FeatherHAB/wsprhab Changeset - aa624684a65e

Changeset - aa624684a65e

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! ! !

Ethan Zonca - 10 years ago 2016-04-02 19:58:26
ez@ethanzonca.com

Update CMSIS and HAL library, fixes USART issues! Now the uart actually receives data from the GPS.

22 files changed:

.cproject

.settings/language.settings.xml

Makefile

STM32F031G6_FLASH.ld

drivers/CMSIS/DSP_Lib/Examples/arm_class_marks_example/ARM/arm_class_marks_example_f32.c

211

drivers/CMSIS/DSP_Lib/Examples/arm_class_marks_example/GCC/arm_class_marks_example_f32.c

211

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/arm_convolution_example_f32.c

247

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/math_helper.c

458

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/math_helper.h

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/arm_convolution_example_f32.c

247

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/math_helper.c

458

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/math_helper.h

drivers/CMSIS/DSP_Lib/Examples/arm_dotproduct_example/ARM/arm_dotproduct_example_f32.c

178

drivers/CMSIS/DSP_Lib/Examples/arm_dotproduct_example/GCC/arm_dotproduct_example_f32.c

178

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/ARM/arm_fft_bin_data.c

308

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/ARM/arm_fft_bin_example_f32.c

158

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/GCC/arm_fft_bin_data.c

308

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/GCC/arm_fft_bin_example_f32.c

158

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/arm_fir_data.c

134

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/arm_fir_example_f32.c

233

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/math_helper.c

458

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/math_helper.h

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.cproject

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@@ @@ -14,28 +14,28 @@ @@
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+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.instructionset.1320909947" name="Instruction set" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.instructionset" value="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.instructionset.thumb" valueType="enumerated"/>
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@@ @@ -61,7 +61,7 @@ @@
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 							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.name.646545745" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.name"/>
+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.name.646545745" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.name" value="GNU Tools for ARM Embedded Processors" valueType="string"/>
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@@ @@ -86,9 +86,9 @@ @@
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-							<builder id="ilg.gnuarmeclipse.managedbuild.cross.builder.2134930605" managedBuildOn="false" name="Gnu Make Builder.Default" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
+							<builder id="ilg.gnuarmeclipse.managedbuild.cross.builder.2134930605" keepEnvironmentInBuildfile="false" managedBuildOn="false" name="Gnu Make Builder" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.1256890659" name="Cross ARM GNU Assembler" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler">
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@@ @@ -96,32 +96,46 @@ @@
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 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.c.linker.1047334191" name="Cross ARM C Linker" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.c.linker">
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 									<additionalInput kind="additionalinputdependency" paths="$(USER_OBJS)"/>
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 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.printsize.format.1013771305" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.printsize.format"/>
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 			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
 			<storageModule moduleId="ilg.gnuarmeclipse.managedbuild.packs">
 				<option id="cmsis.device.name" value="STM32F031G6"/>
 				<option id="cmsis.subfamily.name" value="STM32F031"/>
 				<option id="cmsis.family.name" value="STM32F0 Series"/>
 				<option id="cmsis.device.vendor.name" value="STMicroelectronics"/>
 				<option id="cmsis.device.vendor.id" value="13"/>
 				<option id="cmsis.device.pack.vendor" value="Keil"/>
 				<option id="cmsis.device.pack.name" value="STM32F0xx_DFP"/>
 				<option id="cmsis.device.pack.version" value="1.4.0"/>
 				<option id="cmsis.core.name" value="Cortex-M0"/>
 				<option id="cmsis.compiler.define" value="STM32F031"/>
 				<memory section="IRAM1" size="0x1000" start="0x20000000" startup="0"/>
 				<memory section="IROM1" size="0x8000" start="0x08000000" startup="1"/>
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@@ @@ -134,4 +148,10 @@ @@
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 	<storageModule moduleId="org.eclipse.cdt.core.LanguageSettingsProviders"/>
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 		<configuration configurationName="Default">
 			<resource resourceType="PROJECT" workspacePath="/wsprhab"/>
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 	<storageModule moduleId="org.eclipse.cdt.internal.ui.text.commentOwnerProjectMappings"/>
 </cproject>

.settings/language.settings.xml

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@@ @@ -5,7 +5,7 @@ @@
 			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
 			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
 			<provider copy-of="extension" id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser"/>
-			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="1398560194249728998" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT GCC Built-in Compiler Settings Cross ARM" parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="1410364124118934374" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT GCC Built-in Compiler Settings Cross ARM" parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
 				<language-scope id="org.eclipse.cdt.core.gcc"/>
 				<language-scope id="org.eclipse.cdt.core.g++"/>
 			</provider>

Makefile

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@@ @@ -11,8 +11,7 @@ @@
 BUILD_NUMBER ?= 0
 # SOURCES: list of sources in the user application
 SOURCES = main.c system_stm32f0xx.c adc.c dma.c gpio.c i2c.c interrupts.c usart.c  gps.c
 SOURCES = main.c  adc.c gpio.c i2c.c interrupts.c usart.c  gps.c system_stm32f0xx.c
 # TARGET: name of the user application
 TARGET = wsprhab-b$(BUILD_NUMBER)

STM32F031G6_FLASH.ld

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@@ @@ -35,7 +35,7 @@ ENTRY(Reset_Handler) @@
 /* Generate a link error if heap and stack don't fit into RAM */
 _Min_Heap_Size = 0;      /* required amount of heap  */
-_Min_Stack_Size = 0x400; /* required amount of stack */
+_Min_Stack_Size = 0x200; /* required amount of stack */
 /* Specify the memory areas */
 MEMORY

drivers/CMSIS/DSP_Lib/Examples/arm_class_marks_example/ARM/arm_class_marks_example_f32.c

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@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_class_marks_example_f32.c
+*
 * Description:   Example code to calculate Minimum, Maximum
 *                Mean, std and variance of marks obtained in a class
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup ClassMarks Class Marks Example
+ *
  * \par Description:
  * \par
  * Demonstrates the use the Maximum, Minimum, Mean, Standard Deviation, Variance
  * and Matrix functions to calculate statistical values of marks obtained in a class.
+ *
  * \note This example also demonstrates the usage of static initialization.
+ *
  * \par Variables Description:
  * \par
  * \li \c testMarks_f32 points to the marks scored by 20 students in 4 subjects
  * \li \c max_marks     Maximum of all marks
  * \li \c min_marks     Minimum of all marks
  * \li \c mean          Mean of all marks
  * \li \c var           Variance of the marks
  * \li \c std           Standard deviation of the marks
  * \li \c numStudents   Total number of students in the class
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_mat_init_f32()
  * - arm_mat_mult_f32()
  * - arm_max_f32()
  * - arm_min_f32()
  * - arm_mean_f32()
  * - arm_std_f32()
  * - arm_var_f32()
+ *
  * <b> Refer  </b>
  * \link arm_class_marks_example_f32.c \endlink
+ *
  */
 /** \example arm_class_marks_example_f32.c
   */
 #include "arm_math.h"
 #define USE_STATIC_INIT
  /* ----------------------------------------------------------------------
 ** Global defines
 ** ------------------------------------------------------------------- */
 #define TEST_LENGTH_SAMPLES   (20*4)
 /* ----------------------------------------------------------------------
 ** List of Marks scored by 20 students for 4 subjects
 ** ------------------------------------------------------------------- */
 const float32_t testMarks_f32[TEST_LENGTH_SAMPLES] =
+{
 .000000,  37.000000,  81.000000,  28.000000,
 .000000,  72.000000,  36.000000,  38.000000,
 .000000,  51.000000,  63.000000,  64.000000,
 .000000,  82.000000,  95.000000,  90.000000,
 .000000,  51.000000,  54.000000,  42.000000,
 .000000,  56.000000,  45.000000,  57.000000,
 .000000,  69.000000,  35.000000,  52.000000,
 .000000,  81.000000,  58.000000,  47.000000,
 .000000,  76.000000, 100.000000,  29.000000,
 .000000,  47.000000,  29.000000,  50.000000,
 .000000,  41.000000,  61.000000,  46.000000,
 .000000,  50.000000,  48.000000,  36.000000,
 .000000,  55.000000,  44.000000,  40.000000,
 .000000,  94.000000,  84.000000,  37.000000,
 .000000,  71.000000,  47.000000,  77.000000,
 .000000,  50.000000,  49.000000,  35.000000,
 .000000,  67.000000,  40.000000,  31.000000,
 .000000,  68.000000,  61.000000,  38.000000,
 .000000,  28.000000,  28.000000,  76.000000,
 .000000,  33.000000,  29.000000,  39.000000
 };
 /* ----------------------------------------------------------------------
 * Number of subjects X 1
 * ------------------------------------------------------------------- */
 const float32_t testUnity_f32[4] =
+{
 .000,  1.000,   1.000,  1.000
 };
 /* ----------------------------------------------------------------------
 ** f32 Output buffer
 ** ------------------------------------------------------------------- */
 static float32_t testOutput[TEST_LENGTH_SAMPLES];
 /* ------------------------------------------------------------------
 * Global defines
 *------------------------------------------------------------------- */
 #define   NUMSTUDENTS  20
 #define     NUMSUBJECTS  4
 /* ------------------------------------------------------------------
 * Global variables
 *------------------------------------------------------------------- */
  uint32_t    numStudents = 20;
  uint32_t    numSubjects = 4;
 float32_t    max_marks, min_marks, mean, std, var;
  uint32_t    student_num;
 /* ----------------------------------------------------------------------------------
 * Main f32 test function.  It returns maximum marks secured and student number
 * ------------------------------------------------------------------------------- */
 int32_t main()
+{
 #ifndef  USE_STATIC_INIT
   arm_matrix_instance_f32 srcA;
   arm_matrix_instance_f32 srcB;
   arm_matrix_instance_f32 dstC;
   /* Input and output matrices initializations */
   arm_mat_init_f32(&srcA, numStudents, numSubjects, (float32_t *)testMarks_f32);
   arm_mat_init_f32(&srcB, numSubjects, 1, (float32_t *)testUnity_f32);
   arm_mat_init_f32(&dstC, numStudents, 1, testOutput);
 #else
   /* Static Initializations of Input and output matrix sizes and array */
   arm_matrix_instance_f32 srcA = {NUMSTUDENTS, NUMSUBJECTS, (float32_t *)testMarks_f32};
   arm_matrix_instance_f32 srcB = {NUMSUBJECTS, 1, (float32_t *)testUnity_f32};
   arm_matrix_instance_f32 dstC = {NUMSTUDENTS, 1, testOutput};
 #endif
   /* ----------------------------------------------------------------------
   *Call the Matrix multiplication process function
   * ------------------------------------------------------------------- */
   arm_mat_mult_f32(&srcA, &srcB, &dstC);
   /* ----------------------------------------------------------------------
   ** Call the Max function to calculate max marks among numStudents
   ** ------------------------------------------------------------------- */
   arm_max_f32(testOutput, numStudents, &max_marks, &student_num);
   /* ----------------------------------------------------------------------
   ** Call the Min function to calculate min marks among numStudents
   ** ------------------------------------------------------------------- */
   arm_min_f32(testOutput, numStudents, &min_marks, &student_num);
   /* ----------------------------------------------------------------------
   ** Call the Mean function to calculate mean
   ** ------------------------------------------------------------------- */
   arm_mean_f32(testOutput, numStudents, &mean);
   /* ----------------------------------------------------------------------
   ** Call the std function to calculate standard deviation
   ** ------------------------------------------------------------------- */
   arm_std_f32(testOutput, numStudents, &std);
   /* ----------------------------------------------------------------------
   ** Call the var function to calculate variance
   ** ------------------------------------------------------------------- */
   arm_var_f32(testOutput, numStudents, &var);
   while(1);                             /* main function does not return */
+}

drivers/CMSIS/DSP_Lib/Examples/arm_class_marks_example/GCC/arm_class_marks_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_class_marks_example_f32.c
+*
 * Description:   Example code to calculate Minimum, Maximum
 *                Mean, std and variance of marks obtained in a class
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup ClassMarks Class Marks Example
+ *
  * \par Description:
  * \par
  * Demonstrates the use the Maximum, Minimum, Mean, Standard Deviation, Variance
  * and Matrix functions to calculate statistical values of marks obtained in a class.
+ *
  * \note This example also demonstrates the usage of static initialization.
+ *
  * \par Variables Description:
  * \par
  * \li \c testMarks_f32 points to the marks scored by 20 students in 4 subjects
  * \li \c max_marks     Maximum of all marks
  * \li \c min_marks     Minimum of all marks
  * \li \c mean          Mean of all marks
  * \li \c var           Variance of the marks
  * \li \c std           Standard deviation of the marks
  * \li \c numStudents   Total number of students in the class
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_mat_init_f32()
  * - arm_mat_mult_f32()
  * - arm_max_f32()
  * - arm_min_f32()
  * - arm_mean_f32()
  * - arm_std_f32()
  * - arm_var_f32()
+ *
  * <b> Refer  </b>
  * \link arm_class_marks_example_f32.c \endlink
+ *
  */
 /** \example arm_class_marks_example_f32.c
   */
 #include "arm_math.h"
 #define USE_STATIC_INIT
  /* ----------------------------------------------------------------------
 ** Global defines
 ** ------------------------------------------------------------------- */
 #define TEST_LENGTH_SAMPLES   (20*4)
 /* ----------------------------------------------------------------------
 ** List of Marks scored by 20 students for 4 subjects
 ** ------------------------------------------------------------------- */
 const float32_t testMarks_f32[TEST_LENGTH_SAMPLES] =
+{
 .000000,  37.000000,  81.000000,  28.000000,
 .000000,  72.000000,  36.000000,  38.000000,
 .000000,  51.000000,  63.000000,  64.000000,
 .000000,  82.000000,  95.000000,  90.000000,
 .000000,  51.000000,  54.000000,  42.000000,
 .000000,  56.000000,  45.000000,  57.000000,
 .000000,  69.000000,  35.000000,  52.000000,
 .000000,  81.000000,  58.000000,  47.000000,
 .000000,  76.000000, 100.000000,  29.000000,
 .000000,  47.000000,  29.000000,  50.000000,
 .000000,  41.000000,  61.000000,  46.000000,
 .000000,  50.000000,  48.000000,  36.000000,
 .000000,  55.000000,  44.000000,  40.000000,
 .000000,  94.000000,  84.000000,  37.000000,
 .000000,  71.000000,  47.000000,  77.000000,
 .000000,  50.000000,  49.000000,  35.000000,
 .000000,  67.000000,  40.000000,  31.000000,
 .000000,  68.000000,  61.000000,  38.000000,
 .000000,  28.000000,  28.000000,  76.000000,
 .000000,  33.000000,  29.000000,  39.000000
 };
 /* ----------------------------------------------------------------------
 * Number of subjects X 1
 * ------------------------------------------------------------------- */
 const float32_t testUnity_f32[4] =
+{
 .000,  1.000,   1.000,  1.000
 };
 /* ----------------------------------------------------------------------
 ** f32 Output buffer
 ** ------------------------------------------------------------------- */
 static float32_t testOutput[TEST_LENGTH_SAMPLES];
 /* ------------------------------------------------------------------
 * Global defines
 *------------------------------------------------------------------- */
 #define   NUMSTUDENTS  20
 #define     NUMSUBJECTS  4
 /* ------------------------------------------------------------------
 * Global variables
 *------------------------------------------------------------------- */
  uint32_t    numStudents = 20;
  uint32_t    numSubjects = 4;
 float32_t    max_marks, min_marks, mean, std, var;
  uint32_t    student_num;
 /* ----------------------------------------------------------------------------------
 * Main f32 test function.  It returns maximum marks secured and student number
 * ------------------------------------------------------------------------------- */
 int32_t main()
+{
 #ifndef  USE_STATIC_INIT
   arm_matrix_instance_f32 srcA;
   arm_matrix_instance_f32 srcB;
   arm_matrix_instance_f32 dstC;
   /* Input and output matrices initializations */
   arm_mat_init_f32(&srcA, numStudents, numSubjects, (float32_t *)testMarks_f32);
   arm_mat_init_f32(&srcB, numSubjects, 1, (float32_t *)testUnity_f32);
   arm_mat_init_f32(&dstC, numStudents, 1, testOutput);
 #else
   /* Static Initializations of Input and output matrix sizes and array */
   arm_matrix_instance_f32 srcA = {NUMSTUDENTS, NUMSUBJECTS, (float32_t *)testMarks_f32};
   arm_matrix_instance_f32 srcB = {NUMSUBJECTS, 1, (float32_t *)testUnity_f32};
   arm_matrix_instance_f32 dstC = {NUMSTUDENTS, 1, testOutput};
 #endif
   /* ----------------------------------------------------------------------
   *Call the Matrix multiplication process function
   * ------------------------------------------------------------------- */
   arm_mat_mult_f32(&srcA, &srcB, &dstC);
   /* ----------------------------------------------------------------------
   ** Call the Max function to calculate max marks among numStudents
   ** ------------------------------------------------------------------- */
   arm_max_f32(testOutput, numStudents, &max_marks, &student_num);
   /* ----------------------------------------------------------------------
   ** Call the Min function to calculate min marks among numStudents
   ** ------------------------------------------------------------------- */
   arm_min_f32(testOutput, numStudents, &min_marks, &student_num);
   /* ----------------------------------------------------------------------
   ** Call the Mean function to calculate mean
   ** ------------------------------------------------------------------- */
   arm_mean_f32(testOutput, numStudents, &mean);
   /* ----------------------------------------------------------------------
   ** Call the std function to calculate standard deviation
   ** ------------------------------------------------------------------- */
   arm_std_f32(testOutput, numStudents, &std);
   /* ----------------------------------------------------------------------
   ** Call the var function to calculate variance
   ** ------------------------------------------------------------------- */
   arm_var_f32(testOutput, numStudents, &var);
   while(1);                             /* main function does not return */
+}

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/arm_convolution_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_convolution_example_f32.c
+*
 * Description:   Example code demonstrating Convolution of two input signals using fft.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup ConvolutionExample Convolution Example
+ *
  * \par Description:
  * \par
  * Demonstrates the convolution theorem with the use of the Complex FFT, Complex-by-Complex
  * Multiplication, and Support Functions.
+ *
  * \par Algorithm:
  * \par
  * The convolution theorem states that convolution in the time domain corresponds to
  * multiplication in the frequency domain. Therefore, the Fourier transform of the convoution of
  * two signals is equal to the product of their individual Fourier transforms.
  * The Fourier transform of a signal can be evaluated efficiently using the Fast Fourier Transform (FFT).
  * \par
  * Two input signals, <code>a[n]</code> and <code>b[n]</code>, with lengths \c n1 and \c n2 respectively,
  * are zero padded so that their lengths become \c N, which is greater than or equal to <code>(n1+n2-1)</code>
  * and is a power of 4 as FFT implementation is radix-4.
  * The convolution of <code>a[n]</code> and <code>b[n]</code> is obtained by taking the FFT of the input
  * signals, multiplying the Fourier transforms of the two signals, and taking the inverse FFT of
  * the multiplied result.
  * \par
  * This is denoted by the following equations:
  * <pre> A[k] = FFT(a[n],N)
  * B[k] = FFT(b[n],N)
  * conv(a[n], b[n]) = IFFT(A[k] * B[k], N)</pre>
  * where <code>A[k]</code> and <code>B[k]</code> are the N-point FFTs of the signals <code>a[n]</code>
  * and <code>b[n]</code> respectively.
  * The length of the convolved signal is <code>(n1+n2-1)</code>.
+ *
  * \par Block Diagram:
  * \par
  * \image html Convolution.gif
+ *
  * \par Variables Description:
  * \par
  * \li \c testInputA_f32 points to the first input sequence
  * \li \c srcALen length of the first input sequence
  * \li \c testInputB_f32 points to the second input sequence
  * \li \c srcBLen length of the second input sequence
  * \li \c outLen length of convolution output sequence, <code>(srcALen + srcBLen - 1)</code>
  * \li \c AxB points to the output array where the product of individual FFTs of inputs is stored.
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_fill_f32()
  * - arm_copy_f32()
  * - arm_cfft_radix4_init_f32()
  * - arm_cfft_radix4_f32()
  * - arm_cmplx_mult_cmplx_f32()
+ *
  * <b> Refer  </b>
  * \link arm_convolution_example_f32.c \endlink
+ *
  */
 /** \example arm_convolution_example_f32.c
   */
 #include "arm_math.h"
 #include "math_helper.h"
 /* ----------------------------------------------------------------------
 * Defines each of the tests performed
 * ------------------------------------------------------------------- */
 #define MAX_BLOCKSIZE   128
 #define DELTA           (0.000001f)
 #define SNR_THRESHOLD   90
 /* ----------------------------------------------------------------------
 * Declare I/O buffers
 * ------------------------------------------------------------------- */
 float32_t Ak[MAX_BLOCKSIZE];        /* Input A */
 float32_t Bk[MAX_BLOCKSIZE];        /* Input B */
 float32_t AxB[MAX_BLOCKSIZE * 2];   /* Output */
 /* ----------------------------------------------------------------------
 * Test input data for Floating point Convolution example for 32-blockSize
 * Generated by the MATLAB randn() function
 * ------------------------------------------------------------------- */
 float32_t testInputA_f32[64] =
+{
   -0.808920,   1.357369,   1.180861,  -0.504544,   1.762637,  -0.703285,
 .696966,   0.620571,  -0.151093,  -0.100235,  -0.872382,  -0.403579,
   -0.860749,  -0.382648,  -1.052338,   0.128113,  -0.646269,   1.093377,
   -2.209198,   0.471706,   0.408901,   1.266242,   0.598252,   1.176827,
   -0.203421,   0.213596,  -0.851964,  -0.466958,   0.021841,  -0.698938,
   -0.604107,   0.461778,  -0.318219,   0.942520,   0.577585,   0.417619,
 .614665,   0.563679,  -1.295073,  -0.764437,   0.952194,  -0.859222,
   -0.618554,  -2.268542,  -1.210592,   1.655853,  -2.627219,  -0.994249,
   -1.374704,   0.343799,   0.025619,   1.227481,  -0.708031,   0.069355,
   -1.845228,  -1.570886,   1.010668,  -1.802084,   1.630088,   1.286090,
   -0.161050,  -0.940794,   0.367961,   0.291907
 };
 float32_t testInputB_f32[64] =
+{
 .933724,   0.046881,   1.316470,   0.438345,   0.332682,   2.094885,
 .512081,   0.035546,   0.050894,  -2.320371,   0.168711,  -1.830493,
   -0.444834,  -1.003242,  -0.531494,  -1.365600,  -0.155420,  -0.757692,
   -0.431880,  -0.380021,   0.096243,  -0.695835,   0.558850,  -1.648962,
 .020369,  -0.363630,   0.887146,   0.845503,  -0.252864,  -0.330397,
 .269131,  -1.109295,  -1.027876,   0.135940,   0.116721,  -0.293399,
   -1.349799,   0.166078,  -0.802201,   0.369367,  -0.964568,  -2.266011,
 .465178,   0.651222,  -0.325426,   0.320245,  -0.784178,  -0.579456,
 .093374,   0.604778,  -0.048225,   0.376297,  -0.394412,   0.578182,
   -1.218141,  -1.387326,   0.692462,  -0.631297,   0.153137,  -0.638952,
 .635474,   -0.970468,   1.334057,  -0.111370
 };
 const float testRefOutput_f32[127] =
+{
    -0.818943,    1.229484,  -0.533664,    1.016604,   0.341875,  -1.963656,
 .171476,    3.478033,   7.616361,    6.648384,   0.479069,   1.792012,
    -1.295591,   -7.447818,   0.315830,  -10.657445,  -2.483469,  -6.524236,
    -7.380591,   -3.739005,  -8.388957,    0.184147,  -1.554888,   3.786508,
    -1.684421,    5.400610,  -1.578126,    7.403361,   8.315999,   2.080267,
 .077776,    2.749673,   7.138962,    2.748762,   0.660363,   0.981552,
 .442275,    0.552721,  -2.576892,    4.703989,   0.989156,   8.759344,
    -0.564825,   -3.994680,   0.954710,   -5.014144,   6.592329,   1.599488,
   -13.979146,   -0.391891,  -4.453369,   -2.311242,  -2.948764,   1.761415,
    -0.138322,   10.433007,  -2.309103,    4.297153,   8.535523,   3.209462,
 .695819,    5.569919,   2.514304,    5.582029,   2.060199,   0.642280,
 .024616,    1.686615,  -6.481756,    1.343084,  -3.526451,   1.099073,
    -2.965764,   -0.173723,  -4.111484,    6.528384,  -6.965658,   1.726291,
 .535172,   11.023435,   2.338401,   -4.690188,   1.298210,   3.943885,
 .407885,    5.168365,   0.684131,    1.559181,   1.859998,   2.852417,
 .574070,   -6.369078,   6.023458,   11.837963,  -6.027632,   4.469678,
    -6.799093,   -2.674048,   6.250367,   -6.809971,  -3.459360,   9.112410,
    -2.711621,   -1.336678,   1.564249,   -1.564297,  -1.296760,   8.904013,
    -3.230109,    6.878013,  -7.819823,    3.369909,  -1.657410,  -2.007358,
    -4.112825,    1.370685,  -3.420525,   -6.276605,   3.244873,  -3.352638,
 .545372,    0.902211,   0.197489,   -1.408732,   0.523390,   0.348440, 0
 };
 /* ----------------------------------------------------------------------
 * Declare Global variables
 * ------------------------------------------------------------------- */
 uint32_t srcALen = 64;   /* Length of Input A */
 uint32_t srcBLen = 64;   /* Length of Input B */
 uint32_t outLen;         /* Length of convolution output */
 float32_t snr;           /* output SNR */
 int32_t main(void)
+{
   arm_status status;                           /* Status of the example */
   arm_cfft_radix4_instance_f32 cfft_instance;  /* CFFT Structure instance */
   /* CFFT Structure instance pointer */
   arm_cfft_radix4_instance_f32 *cfft_instance_ptr =
       (arm_cfft_radix4_instance_f32*) &cfft_instance;
   /* output length of convolution */
   outLen = srcALen + srcBLen - 1;
   /* Initialise the fft input buffers with all zeros */
   arm_fill_f32(0.0,  Ak, MAX_BLOCKSIZE);
   arm_fill_f32(0.0,  Bk, MAX_BLOCKSIZE);
   /* Copy the input values to the fft input buffers */
   arm_copy_f32(testInputA_f32,  Ak, MAX_BLOCKSIZE/2);
   arm_copy_f32(testInputB_f32,  Bk, MAX_BLOCKSIZE/2);
   /* Initialize the CFFT function to compute 64 point fft */
   status = arm_cfft_radix4_init_f32(cfft_instance_ptr, 64, 0, 1);
   /* Transform input a[n] from time domain to frequency domain A[k] */
   arm_cfft_radix4_f32(cfft_instance_ptr, Ak);
   /* Transform input b[n] from time domain to frequency domain B[k] */
   arm_cfft_radix4_f32(cfft_instance_ptr, Bk);
   /* Complex Multiplication of the two input buffers in frequency domain */
   arm_cmplx_mult_cmplx_f32(Ak, Bk, AxB, MAX_BLOCKSIZE/2);
   /* Initialize the CIFFT function to compute 64 point ifft */
   status = arm_cfft_radix4_init_f32(cfft_instance_ptr, 64, 1, 1);
   /* Transform the multiplication output from frequency domain to time domain,
      that gives the convolved output  */
   arm_cfft_radix4_f32(cfft_instance_ptr, AxB);
   /* SNR Calculation */
   snr = arm_snr_f32((float32_t *)testRefOutput_f32, AxB, srcALen + srcBLen - 1);
   /* Compare the SNR with threshold to test whether the
      computed output is matched with the reference output values. */
   if( snr > SNR_THRESHOLD)
+  {
     status = ARM_MATH_SUCCESS;
+  }
   if( status != ARM_MATH_SUCCESS)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/math_helper.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.c
+*
 * Description:	Definition of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /* ----------------------------------------------------------------------
 *		Include standard header files
 * -------------------------------------------------------------------- */
 #include<math.h>
 /* ----------------------------------------------------------------------
 *		Include project header files
 * -------------------------------------------------------------------- */
 #include "math_helper.h"
 /**
  * @brief  Caluclation of SNR
  * @param  float* 	Pointer to the reference buffer
  * @param  float*	Pointer to the test buffer
  * @param  uint32_t	total number of samples
  * @return float	SNR
  * The function Caluclates signal to noise ratio for the reference output
  * and test output
  */
 float arm_snr_f32(float *pRef, float *pTest, uint32_t buffSize)
+{
   float EnergySignal = 0.0, EnergyError = 0.0;
   uint32_t i;
   float SNR;
   int temp;
   int *test;
   for (i = 0; i < buffSize; i++)
+    {
  	  /* Checking for a NAN value in pRef array */
 	  test =   (int *)(&pRef[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
 	  /* Checking for a NAN value in pTest array */
 	  test =   (int *)(&pTest[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
       EnergySignal += pRef[i] * pRef[i];
       EnergyError += (pRef[i] - pTest[i]) * (pRef[i] - pTest[i]);
+    }
 	/* Checking for a NAN value in EnergyError */
 	test =   (int *)(&EnergyError);
     temp =  *test;
     if(temp == 0x7FC00000)
+    {
   		return(0);
+    }
   SNR = 10 * log10 (EnergySignal / EnergyError);
   return (SNR);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q15_t* 	    Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q15 (q15_t * input_buf, uint32_t blockSize,
                             uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Converts float to fixed in q12.20 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point(q12.20) values
  */
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1048576.0f corresponds to pow(2, 20) */
       pOut[i] = (q31_t) (pIn[i] * 1048576.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 1.0)
+        {
           pOut[i] = 0x000FFFFF;
+        }
+    }
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q15_t* 	Pointer to Ref buffer
  * @param  q15_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q31_t* 	Pointer to Ref buffer
  * @param  q31_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q31 (q31_t * input_buf,
 								 uint32_t blockSize,
                                  uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q7 (q7_t * input_buf,
 								uint32_t blockSize,
                                 uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Caluclates number of guard bits
  * @param  uint32_t 	number of additions
  * @return none
  * The function Caluclates the number of guard bits
  * depending on the numtaps
  */
 uint32_t arm_calc_guard_bits (uint32_t num_adds)
+{
   uint32_t i = 1, j = 0;
   if (num_adds == 1)
+    {
       return (0);
+    }
   while (i < num_adds)
+    {
       i = i * 2;
       j++;
+    }
   return (j);
+}
 /**
  * @brief  Converts Q15 to floating-point
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 void arm_apply_guard_bits (float32_t * pIn,
 						   uint32_t numSamples,
 						   uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       pIn[i] = pIn[i] * arm_calc_2pow(guard_bits);
+    }
+}
 /**
  * @brief  Calculates pow(2, numShifts)
  * @param  uint32_t 	number of shifts
  * @return pow(2, numShifts)
  */
 uint32_t arm_calc_2pow(uint32_t numShifts)
+{
   uint32_t i, val = 1;
   for (i = 0; i < numShifts; i++)
+    {
       val = val * 2;
+    }
   return(val);
+}
 /**
  * @brief  Converts float to fixed q14
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q14 (float *pIn, q15_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 16384.0f corresponds to pow(2, 14) */
       pOut[i] = (q15_t) (pIn[i] * 16384.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q30 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 1073741824.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q29 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 536870912.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 4.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q28 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q28 (float *pIn, q31_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	/* 268435456.0f corresponds to pow(2, 28) */
       pOut[i] = (q31_t) (pIn[i] * 268435456.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 8.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Clip the float values to +/- 1
  * @param  pIn 	input buffer
  * @param  numSamples 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_clip_f32 (float *pIn, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       if(pIn[i] > 1.0f)
+	  {
 	    pIn[i] = 1.0;
+	  }
 	  else if( pIn[i] < -1.0f)
+	  {
 	    pIn[i] = -1.0;
+	  }
+    }
+}

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/ARM/math_helper.h

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Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2013 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.h
+*
 * Description:	Prototypes of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 #include "arm_math.h"
 #ifndef MATH_HELPER_H
 #define MATH_HELPER_H
 float arm_snr_f32(float *pRef, float *pTest,  uint32_t buffSize);
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples);
 void arm_provide_guard_bits_q15(q15_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_provide_guard_bits_q31(q31_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_float_to_q14(float *pIn, q15_t *pOut, uint32_t numSamples);
 void arm_float_to_q29(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q28(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q30(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_clip_f32(float *pIn, uint32_t numSamples);
 uint32_t arm_calc_guard_bits(uint32_t num_adds);
 void arm_apply_guard_bits (float32_t * pIn, uint32_t numSamples, uint32_t guard_bits);
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples);
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t *pOut, uint32_t numSamples);
 uint32_t arm_calc_2pow(uint32_t guard_bits);
 #endif

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/arm_convolution_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_convolution_example_f32.c
+*
 * Description:   Example code demonstrating Convolution of two input signals using fft.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup ConvolutionExample Convolution Example
+ *
  * \par Description:
  * \par
  * Demonstrates the convolution theorem with the use of the Complex FFT, Complex-by-Complex
  * Multiplication, and Support Functions.
+ *
  * \par Algorithm:
  * \par
  * The convolution theorem states that convolution in the time domain corresponds to
  * multiplication in the frequency domain. Therefore, the Fourier transform of the convoution of
  * two signals is equal to the product of their individual Fourier transforms.
  * The Fourier transform of a signal can be evaluated efficiently using the Fast Fourier Transform (FFT).
  * \par
  * Two input signals, <code>a[n]</code> and <code>b[n]</code>, with lengths \c n1 and \c n2 respectively,
  * are zero padded so that their lengths become \c N, which is greater than or equal to <code>(n1+n2-1)</code>
  * and is a power of 4 as FFT implementation is radix-4.
  * The convolution of <code>a[n]</code> and <code>b[n]</code> is obtained by taking the FFT of the input
  * signals, multiplying the Fourier transforms of the two signals, and taking the inverse FFT of
  * the multiplied result.
  * \par
  * This is denoted by the following equations:
  * <pre> A[k] = FFT(a[n],N)
  * B[k] = FFT(b[n],N)
  * conv(a[n], b[n]) = IFFT(A[k] * B[k], N)</pre>
  * where <code>A[k]</code> and <code>B[k]</code> are the N-point FFTs of the signals <code>a[n]</code>
  * and <code>b[n]</code> respectively.
  * The length of the convolved signal is <code>(n1+n2-1)</code>.
+ *
  * \par Block Diagram:
  * \par
  * \image html Convolution.gif
+ *
  * \par Variables Description:
  * \par
  * \li \c testInputA_f32 points to the first input sequence
  * \li \c srcALen length of the first input sequence
  * \li \c testInputB_f32 points to the second input sequence
  * \li \c srcBLen length of the second input sequence
  * \li \c outLen length of convolution output sequence, <code>(srcALen + srcBLen - 1)</code>
  * \li \c AxB points to the output array where the product of individual FFTs of inputs is stored.
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_fill_f32()
  * - arm_copy_f32()
  * - arm_cfft_radix4_init_f32()
  * - arm_cfft_radix4_f32()
  * - arm_cmplx_mult_cmplx_f32()
+ *
  * <b> Refer  </b>
  * \link arm_convolution_example_f32.c \endlink
+ *
  */
 /** \example arm_convolution_example_f32.c
   */
 #include "arm_math.h"
 #include "math_helper.h"
 /* ----------------------------------------------------------------------
 * Defines each of the tests performed
 * ------------------------------------------------------------------- */
 #define MAX_BLOCKSIZE   128
 #define DELTA           (0.000001f)
 #define SNR_THRESHOLD   90
 /* ----------------------------------------------------------------------
 * Declare I/O buffers
 * ------------------------------------------------------------------- */
 float32_t Ak[MAX_BLOCKSIZE];        /* Input A */
 float32_t Bk[MAX_BLOCKSIZE];        /* Input B */
 float32_t AxB[MAX_BLOCKSIZE * 2];   /* Output */
 /* ----------------------------------------------------------------------
 * Test input data for Floating point Convolution example for 32-blockSize
 * Generated by the MATLAB randn() function
 * ------------------------------------------------------------------- */
 float32_t testInputA_f32[64] =
+{
   -0.808920,   1.357369,   1.180861,  -0.504544,   1.762637,  -0.703285,
 .696966,   0.620571,  -0.151093,  -0.100235,  -0.872382,  -0.403579,
   -0.860749,  -0.382648,  -1.052338,   0.128113,  -0.646269,   1.093377,
   -2.209198,   0.471706,   0.408901,   1.266242,   0.598252,   1.176827,
   -0.203421,   0.213596,  -0.851964,  -0.466958,   0.021841,  -0.698938,
   -0.604107,   0.461778,  -0.318219,   0.942520,   0.577585,   0.417619,
 .614665,   0.563679,  -1.295073,  -0.764437,   0.952194,  -0.859222,
   -0.618554,  -2.268542,  -1.210592,   1.655853,  -2.627219,  -0.994249,
   -1.374704,   0.343799,   0.025619,   1.227481,  -0.708031,   0.069355,
   -1.845228,  -1.570886,   1.010668,  -1.802084,   1.630088,   1.286090,
   -0.161050,  -0.940794,   0.367961,   0.291907
 };
 float32_t testInputB_f32[64] =
+{
 .933724,   0.046881,   1.316470,   0.438345,   0.332682,   2.094885,
 .512081,   0.035546,   0.050894,  -2.320371,   0.168711,  -1.830493,
   -0.444834,  -1.003242,  -0.531494,  -1.365600,  -0.155420,  -0.757692,
   -0.431880,  -0.380021,   0.096243,  -0.695835,   0.558850,  -1.648962,
 .020369,  -0.363630,   0.887146,   0.845503,  -0.252864,  -0.330397,
 .269131,  -1.109295,  -1.027876,   0.135940,   0.116721,  -0.293399,
   -1.349799,   0.166078,  -0.802201,   0.369367,  -0.964568,  -2.266011,
 .465178,   0.651222,  -0.325426,   0.320245,  -0.784178,  -0.579456,
 .093374,   0.604778,  -0.048225,   0.376297,  -0.394412,   0.578182,
   -1.218141,  -1.387326,   0.692462,  -0.631297,   0.153137,  -0.638952,
 .635474,   -0.970468,   1.334057,  -0.111370
 };
 const float testRefOutput_f32[127] =
+{
    -0.818943,    1.229484,  -0.533664,    1.016604,   0.341875,  -1.963656,
 .171476,    3.478033,   7.616361,    6.648384,   0.479069,   1.792012,
    -1.295591,   -7.447818,   0.315830,  -10.657445,  -2.483469,  -6.524236,
    -7.380591,   -3.739005,  -8.388957,    0.184147,  -1.554888,   3.786508,
    -1.684421,    5.400610,  -1.578126,    7.403361,   8.315999,   2.080267,
 .077776,    2.749673,   7.138962,    2.748762,   0.660363,   0.981552,
 .442275,    0.552721,  -2.576892,    4.703989,   0.989156,   8.759344,
    -0.564825,   -3.994680,   0.954710,   -5.014144,   6.592329,   1.599488,
   -13.979146,   -0.391891,  -4.453369,   -2.311242,  -2.948764,   1.761415,
    -0.138322,   10.433007,  -2.309103,    4.297153,   8.535523,   3.209462,
 .695819,    5.569919,   2.514304,    5.582029,   2.060199,   0.642280,
 .024616,    1.686615,  -6.481756,    1.343084,  -3.526451,   1.099073,
    -2.965764,   -0.173723,  -4.111484,    6.528384,  -6.965658,   1.726291,
 .535172,   11.023435,   2.338401,   -4.690188,   1.298210,   3.943885,
 .407885,    5.168365,   0.684131,    1.559181,   1.859998,   2.852417,
 .574070,   -6.369078,   6.023458,   11.837963,  -6.027632,   4.469678,
    -6.799093,   -2.674048,   6.250367,   -6.809971,  -3.459360,   9.112410,
    -2.711621,   -1.336678,   1.564249,   -1.564297,  -1.296760,   8.904013,
    -3.230109,    6.878013,  -7.819823,    3.369909,  -1.657410,  -2.007358,
    -4.112825,    1.370685,  -3.420525,   -6.276605,   3.244873,  -3.352638,
 .545372,    0.902211,   0.197489,   -1.408732,   0.523390,   0.348440, 0
 };
 /* ----------------------------------------------------------------------
 * Declare Global variables
 * ------------------------------------------------------------------- */
 uint32_t srcALen = 64;   /* Length of Input A */
 uint32_t srcBLen = 64;   /* Length of Input B */
 uint32_t outLen;         /* Length of convolution output */
 float32_t snr;           /* output SNR */
 int32_t main(void)
+{
   arm_status status;                           /* Status of the example */
   arm_cfft_radix4_instance_f32 cfft_instance;  /* CFFT Structure instance */
   /* CFFT Structure instance pointer */
   arm_cfft_radix4_instance_f32 *cfft_instance_ptr =
       (arm_cfft_radix4_instance_f32*) &cfft_instance;
   /* output length of convolution */
   outLen = srcALen + srcBLen - 1;
   /* Initialise the fft input buffers with all zeros */
   arm_fill_f32(0.0,  Ak, MAX_BLOCKSIZE);
   arm_fill_f32(0.0,  Bk, MAX_BLOCKSIZE);
   /* Copy the input values to the fft input buffers */
   arm_copy_f32(testInputA_f32,  Ak, MAX_BLOCKSIZE/2);
   arm_copy_f32(testInputB_f32,  Bk, MAX_BLOCKSIZE/2);
   /* Initialize the CFFT function to compute 64 point fft */
   status = arm_cfft_radix4_init_f32(cfft_instance_ptr, 64, 0, 1);
   /* Transform input a[n] from time domain to frequency domain A[k] */
   arm_cfft_radix4_f32(cfft_instance_ptr, Ak);
   /* Transform input b[n] from time domain to frequency domain B[k] */
   arm_cfft_radix4_f32(cfft_instance_ptr, Bk);
   /* Complex Multiplication of the two input buffers in frequency domain */
   arm_cmplx_mult_cmplx_f32(Ak, Bk, AxB, MAX_BLOCKSIZE/2);
   /* Initialize the CIFFT function to compute 64 point ifft */
   status = arm_cfft_radix4_init_f32(cfft_instance_ptr, 64, 1, 1);
   /* Transform the multiplication output from frequency domain to time domain,
      that gives the convolved output  */
   arm_cfft_radix4_f32(cfft_instance_ptr, AxB);
   /* SNR Calculation */
   snr = arm_snr_f32((float32_t *)testRefOutput_f32, AxB, srcALen + srcBLen - 1);
   /* Compare the SNR with threshold to test whether the
      computed output is matched with the reference output values. */
   if( snr > SNR_THRESHOLD)
+  {
     status = ARM_MATH_SUCCESS;
+  }
   if( status != ARM_MATH_SUCCESS)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/math_helper.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.c
+*
 * Description:	Definition of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /* ----------------------------------------------------------------------
 *		Include standard header files
 * -------------------------------------------------------------------- */
 #include<math.h>
 /* ----------------------------------------------------------------------
 *		Include project header files
 * -------------------------------------------------------------------- */
 #include "math_helper.h"
 /**
  * @brief  Caluclation of SNR
  * @param  float* 	Pointer to the reference buffer
  * @param  float*	Pointer to the test buffer
  * @param  uint32_t	total number of samples
  * @return float	SNR
  * The function Caluclates signal to noise ratio for the reference output
  * and test output
  */
 float arm_snr_f32(float *pRef, float *pTest, uint32_t buffSize)
+{
   float EnergySignal = 0.0, EnergyError = 0.0;
   uint32_t i;
   float SNR;
   int temp;
   int *test;
   for (i = 0; i < buffSize; i++)
+    {
  	  /* Checking for a NAN value in pRef array */
 	  test =   (int *)(&pRef[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
 	  /* Checking for a NAN value in pTest array */
 	  test =   (int *)(&pTest[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
       EnergySignal += pRef[i] * pRef[i];
       EnergyError += (pRef[i] - pTest[i]) * (pRef[i] - pTest[i]);
+    }
 	/* Checking for a NAN value in EnergyError */
 	test =   (int *)(&EnergyError);
     temp =  *test;
     if(temp == 0x7FC00000)
+    {
   		return(0);
+    }
   SNR = 10 * log10 (EnergySignal / EnergyError);
   return (SNR);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q15_t* 	    Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q15 (q15_t * input_buf, uint32_t blockSize,
                             uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Converts float to fixed in q12.20 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point(q12.20) values
  */
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1048576.0f corresponds to pow(2, 20) */
       pOut[i] = (q31_t) (pIn[i] * 1048576.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 1.0)
+        {
           pOut[i] = 0x000FFFFF;
+        }
+    }
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q15_t* 	Pointer to Ref buffer
  * @param  q15_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q31_t* 	Pointer to Ref buffer
  * @param  q31_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q31 (q31_t * input_buf,
 								 uint32_t blockSize,
                                  uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q7 (q7_t * input_buf,
 								uint32_t blockSize,
                                 uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Caluclates number of guard bits
  * @param  uint32_t 	number of additions
  * @return none
  * The function Caluclates the number of guard bits
  * depending on the numtaps
  */
 uint32_t arm_calc_guard_bits (uint32_t num_adds)
+{
   uint32_t i = 1, j = 0;
   if (num_adds == 1)
+    {
       return (0);
+    }
   while (i < num_adds)
+    {
       i = i * 2;
       j++;
+    }
   return (j);
+}
 /**
  * @brief  Converts Q15 to floating-point
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 void arm_apply_guard_bits (float32_t * pIn,
 						   uint32_t numSamples,
 						   uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       pIn[i] = pIn[i] * arm_calc_2pow(guard_bits);
+    }
+}
 /**
  * @brief  Calculates pow(2, numShifts)
  * @param  uint32_t 	number of shifts
  * @return pow(2, numShifts)
  */
 uint32_t arm_calc_2pow(uint32_t numShifts)
+{
   uint32_t i, val = 1;
   for (i = 0; i < numShifts; i++)
+    {
       val = val * 2;
+    }
   return(val);
+}
 /**
  * @brief  Converts float to fixed q14
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q14 (float *pIn, q15_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 16384.0f corresponds to pow(2, 14) */
       pOut[i] = (q15_t) (pIn[i] * 16384.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q30 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 1073741824.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q29 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 536870912.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 4.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q28 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q28 (float *pIn, q31_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	/* 268435456.0f corresponds to pow(2, 28) */
       pOut[i] = (q31_t) (pIn[i] * 268435456.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 8.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Clip the float values to +/- 1
  * @param  pIn 	input buffer
  * @param  numSamples 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_clip_f32 (float *pIn, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       if(pIn[i] > 1.0f)
+	  {
 	    pIn[i] = 1.0;
+	  }
 	  else if( pIn[i] < -1.0f)
+	  {
 	    pIn[i] = -1.0;
+	  }
+    }
+}

drivers/CMSIS/DSP_Lib/Examples/arm_convolution_example/GCC/math_helper.h

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2013 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.h
+*
 * Description:	Prototypes of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 #include "arm_math.h"
 #ifndef MATH_HELPER_H
 #define MATH_HELPER_H
 float arm_snr_f32(float *pRef, float *pTest,  uint32_t buffSize);
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples);
 void arm_provide_guard_bits_q15(q15_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_provide_guard_bits_q31(q31_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_float_to_q14(float *pIn, q15_t *pOut, uint32_t numSamples);
 void arm_float_to_q29(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q28(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q30(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_clip_f32(float *pIn, uint32_t numSamples);
 uint32_t arm_calc_guard_bits(uint32_t num_adds);
 void arm_apply_guard_bits (float32_t * pIn, uint32_t numSamples, uint32_t guard_bits);
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples);
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t *pOut, uint32_t numSamples);
 uint32_t arm_calc_2pow(uint32_t guard_bits);
 #endif

drivers/CMSIS/DSP_Lib/Examples/arm_dotproduct_example/ARM/arm_dotproduct_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_dotproduct_example_f32.c
+*
 * Description:   Example code computing dot product of two vectors.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup DotproductExample Dot Product Example
+ *
  * \par Description:
  * \par
  * Demonstrates the use of the Multiply and Add functions to perform the dot product.
  * The dot product of two vectors is obtained by multiplying corresponding elements
  * and summing the products.
  * \par Algorithm:
  * \par
  * The two input vectors \c A and \c B with length \c n, are multiplied element-by-element
  * and then added to obtain dot product.
  * \par
  * This is denoted by the following equation:
  *         <pre>  dotProduct = A[0] * B[0] + A[1] * B[1] + ... + A[n-1] * B[n-1]</pre>
+ *
  * \par Block Diagram:
  * \par
  * \image html dotProduct.gif
+ *
  * \par Variables Description:
  * \par
  * \li \c srcA_buf_f32 points to first input vector
  * \li \c srcB_buf_f32 points to second input vector
  * \li \c testOutput   stores dot product of the two input vectors.
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_mult_f32()
  * - arm_add_f32()
+ *
  * <b> Refer  </b>
  * \link arm_dotproduct_example_f32.c \endlink
+ *
  */
 /** \example arm_dotproduct_example_f32.c
   */
 #include <math.h>
 #include "arm_math.h"
 /* ----------------------------------------------------------------------
 * Defines each of the tests performed
 * ------------------------------------------------------------------- */
 #define MAX_BLOCKSIZE     32
 #define DELTA           (0.000001f)
 /* ----------------------------------------------------------------------
 * Test input data for Floating point Dot Product example for 32-blockSize
 * Generated by the MATLAB randn() function
 * ------------------------------------------------------------------- */
 /* ----------------------------------------------------------------------
 ** Test input data of srcA for blockSize 32
 ** ------------------------------------------------------------------- */
 float32_t srcA_buf_f32[MAX_BLOCKSIZE] =
+{
   -0.4325648115282207,  -1.6655843782380970,  0.1253323064748307,
 .2876764203585489,  -1.1464713506814637,  1.1909154656429988,
 .1891642016521031,  -0.0376332765933176,  0.3272923614086541,
 .1746391428209245,  -0.1867085776814394,  0.7257905482933027,
   -0.5883165430141887,   2.1831858181971011, -0.1363958830865957,
 .1139313135208096,   1.0667682113591888,  0.0592814605236053,
   -0.0956484054836690,  -0.8323494636500225,  0.2944108163926404,
   -1.3361818579378040,   0.7143245518189522,  1.6235620644462707,
   -0.6917757017022868,   0.8579966728282626,  1.2540014216025324,
   -1.5937295764474768,  -1.4409644319010200,  0.5711476236581780,
   -0.3998855777153632,   0.6899973754643451
 };
 /* ----------------------------------------------------------------------
 ** Test input data of srcB for blockSize 32
 ** ------------------------------------------------------------------- */
 float32_t srcB_buf_f32[MAX_BLOCKSIZE] =
+{
 .7491401329284098,  0.1325982188803279,   0.3252281811989881,
   -0.7938091410349637,  0.3149236145048914,  -0.5272704888029532,
 .9322666565031119,  1.1646643544607362,  -2.0456694357357357,
   -0.6443728590041911,  1.7410657940825480,   0.4867684246821860,
 .0488288293660140,  1.4885752747099299,   1.2705014969484090,
   -1.8561241921210170,  2.1343209047321410,  1.4358467535865909,
   -0.9173023332875400, -1.1060770780029008,   0.8105708062681296,
 .6985430696369063, -0.4015827425012831,   1.2687512030669628,
   -0.7836083053674872,  0.2132664971465569,   0.7878984786088954,
 .8966819356782295, -0.1869172943544062,   1.0131816724341454,
 .2484350696132857,  0.0596083377937976
 };
 /* Reference dot product output */
 float32_t  refDotProdOut = 5.9273644806352142;
 /* ----------------------------------------------------------------------
 * Declare Global variables
 * ------------------------------------------------------------------- */
 float32_t multOutput[MAX_BLOCKSIZE];  /* Intermediate output */
 float32_t testOutput;  /* Final ouput */
 arm_status status;   /* Status of the example */
 int32_t main(void)
+{
   uint32_t i;       /* Loop counter */
   float32_t diff;     /* Difference between reference and test outputs */
   /* Multiplication of two input buffers */
   arm_mult_f32(srcA_buf_f32, srcB_buf_f32, multOutput, MAX_BLOCKSIZE);
   /* Accumulate the multiplication output values to
      get the dot product of the two inputs */
   for(i=0; i< MAX_BLOCKSIZE; i++)
+  {
     arm_add_f32(&testOutput, &multOutput[i], &testOutput, 1);
+  }
   /* absolute value of difference between ref and test */
   diff = fabsf(refDotProdOut - testOutput);
   /* Comparison of dot product value with reference */
   if(diff > DELTA)
+  {
     status = ARM_MATH_TEST_FAILURE;
+  }
   if( status == ARM_MATH_TEST_FAILURE)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_dotproduct_example/GCC/arm_dotproduct_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:         arm_dotproduct_example_f32.c
+*
 * Description:   Example code computing dot product of two vectors.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup DotproductExample Dot Product Example
+ *
  * \par Description:
  * \par
  * Demonstrates the use of the Multiply and Add functions to perform the dot product.
  * The dot product of two vectors is obtained by multiplying corresponding elements
  * and summing the products.
  * \par Algorithm:
  * \par
  * The two input vectors \c A and \c B with length \c n, are multiplied element-by-element
  * and then added to obtain dot product.
  * \par
  * This is denoted by the following equation:
  *         <pre>  dotProduct = A[0] * B[0] + A[1] * B[1] + ... + A[n-1] * B[n-1]</pre>
+ *
  * \par Block Diagram:
  * \par
  * \image html dotProduct.gif
+ *
  * \par Variables Description:
  * \par
  * \li \c srcA_buf_f32 points to first input vector
  * \li \c srcB_buf_f32 points to second input vector
  * \li \c testOutput   stores dot product of the two input vectors.
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_mult_f32()
  * - arm_add_f32()
+ *
  * <b> Refer  </b>
  * \link arm_dotproduct_example_f32.c \endlink
+ *
  */
 /** \example arm_dotproduct_example_f32.c
   */
 #include <math.h>
 #include "arm_math.h"
 /* ----------------------------------------------------------------------
 * Defines each of the tests performed
 * ------------------------------------------------------------------- */
 #define MAX_BLOCKSIZE     32
 #define DELTA           (0.000001f)
 /* ----------------------------------------------------------------------
 * Test input data for Floating point Dot Product example for 32-blockSize
 * Generated by the MATLAB randn() function
 * ------------------------------------------------------------------- */
 /* ----------------------------------------------------------------------
 ** Test input data of srcA for blockSize 32
 ** ------------------------------------------------------------------- */
 float32_t srcA_buf_f32[MAX_BLOCKSIZE] =
+{
   -0.4325648115282207,  -1.6655843782380970,  0.1253323064748307,
 .2876764203585489,  -1.1464713506814637,  1.1909154656429988,
 .1891642016521031,  -0.0376332765933176,  0.3272923614086541,
 .1746391428209245,  -0.1867085776814394,  0.7257905482933027,
   -0.5883165430141887,   2.1831858181971011, -0.1363958830865957,
 .1139313135208096,   1.0667682113591888,  0.0592814605236053,
   -0.0956484054836690,  -0.8323494636500225,  0.2944108163926404,
   -1.3361818579378040,   0.7143245518189522,  1.6235620644462707,
   -0.6917757017022868,   0.8579966728282626,  1.2540014216025324,
   -1.5937295764474768,  -1.4409644319010200,  0.5711476236581780,
   -0.3998855777153632,   0.6899973754643451
 };
 /* ----------------------------------------------------------------------
 ** Test input data of srcB for blockSize 32
 ** ------------------------------------------------------------------- */
 float32_t srcB_buf_f32[MAX_BLOCKSIZE] =
+{
 .7491401329284098,  0.1325982188803279,   0.3252281811989881,
   -0.7938091410349637,  0.3149236145048914,  -0.5272704888029532,
 .9322666565031119,  1.1646643544607362,  -2.0456694357357357,
   -0.6443728590041911,  1.7410657940825480,   0.4867684246821860,
 .0488288293660140,  1.4885752747099299,   1.2705014969484090,
   -1.8561241921210170,  2.1343209047321410,  1.4358467535865909,
   -0.9173023332875400, -1.1060770780029008,   0.8105708062681296,
 .6985430696369063, -0.4015827425012831,   1.2687512030669628,
   -0.7836083053674872,  0.2132664971465569,   0.7878984786088954,
 .8966819356782295, -0.1869172943544062,   1.0131816724341454,
 .2484350696132857,  0.0596083377937976
 };
 /* Reference dot product output */
 float32_t  refDotProdOut = 5.9273644806352142;
 /* ----------------------------------------------------------------------
 * Declare Global variables
 * ------------------------------------------------------------------- */
 float32_t multOutput[MAX_BLOCKSIZE];  /* Intermediate output */
 float32_t testOutput;  /* Final ouput */
 arm_status status;   /* Status of the example */
 int32_t main(void)
+{
   uint32_t i;       /* Loop counter */
   float32_t diff;     /* Difference between reference and test outputs */
   /* Multiplication of two input buffers */
   arm_mult_f32(srcA_buf_f32, srcB_buf_f32, multOutput, MAX_BLOCKSIZE);
   /* Accumulate the multiplication output values to
      get the dot product of the two inputs */
   for(i=0; i< MAX_BLOCKSIZE; i++)
+  {
     arm_add_f32(&testOutput, &multOutput[i], &testOutput, 1);
+  }
   /* absolute value of difference between ref and test */
   diff = fabsf(refDotProdOut - testOutput);
   /* Comparison of dot product value with reference */
   if(diff > DELTA)
+  {
     status = ARM_MATH_TEST_FAILURE;
+  }
   if( status == ARM_MATH_TEST_FAILURE)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/ARM/arm_fft_bin_data.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
 * Title:	     	arm_fft_bin_data.c
+*
 * Description:	 Data file used for example code
+*
 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 #include "arm_math.h"
 /* ----------------------------------------------------------------------
 Test Input signal contains 10KHz signal + Uniformly distributed white noise
 ** ------------------------------------------------------------------- */
 float32_t testInput_f32_10khz[2048] =
+{
 -0.865129623056441, 	0.000000000000000, 	-2.655020678073846, 	0.000000000000000, 	0.600664612949661, 	0.000000000000000, 	0.080378093886515, 	0.000000000000000,
 -2.899160484012034, 	0.000000000000000, 	2.563004262857762, 	0.000000000000000, 	3.078328403304206, 	0.000000000000000, 	0.105906778385130, 	0.000000000000000,
 .048366940168201, 	0.000000000000000, 	-0.145696461188734, 	0.000000000000000, 	-0.023417155362879, 	0.000000000000000, 	2.127729174988954, 	0.000000000000000,
 -1.176633086028377, 	0.000000000000000, 	3.690223557991855, 	0.000000000000000, 	-0.622791766173194, 	0.000000000000000, 	0.722837373872203, 	0.000000000000000,
 .739754205367484, 	0.000000000000000, 	-0.062610410524552, 	0.000000000000000, 	-0.891296810967338, 	0.000000000000000, 	-1.845872258871811, 	0.000000000000000,
 .195039415434387, 	0.000000000000000, 	-2.177388969045026, 	0.000000000000000, 	1.078649103637905, 	0.000000000000000, 	2.570976050490193, 	0.000000000000000,
 -1.383551403404574, 	0.000000000000000, 	2.392141424058873, 	0.000000000000000, 	2.858002843205065, 	0.000000000000000, 	-3.682433899725536, 	0.000000000000000,
 -3.488146646451150, 	0.000000000000000, 	1.323468578888120, 	0.000000000000000, 	-0.099771155430726, 	0.000000000000000, 	1.561168082500454, 	0.000000000000000,
 .025026795103179, 	0.000000000000000, 	0.928841900171200, 	0.000000000000000, 	2.930499509864950, 	0.000000000000000, 	2.013349089766430, 	0.000000000000000,
 .381676148486737, 	0.000000000000000, 	-3.081062307950236, 	0.000000000000000, 	-0.389579115537544, 	0.000000000000000, 	0.181540149166620, 	0.000000000000000,
 -2.601953341353208, 	0.000000000000000, 	0.333435137783218, 	0.000000000000000, 	-2.812945856162965, 	0.000000000000000, 	2.649109640172910, 	0.000000000000000,
 -1.003963025744654, 	0.000000000000000, 	1.552460768755035, 	0.000000000000000, 	0.088641345335247, 	0.000000000000000, 	-2.519951327113426, 	0.000000000000000,
 -4.341348988610527, 	0.000000000000000, 	0.557772429359965, 	0.000000000000000, 	-1.671267412948494, 	0.000000000000000, 	0.733951350960387, 	0.000000000000000,
 .409263788034864, 	0.000000000000000, 	3.566033071952806, 	0.000000000000000, 	1.882565173848352, 	0.000000000000000, 	-1.106017073793287, 	0.000000000000000,
 .154456720778718, 	0.000000000000000, 	-2.513205795512153, 	0.000000000000000, 	0.310978660939421, 	0.000000000000000, 	0.579706500111723, 	0.000000000000000,
 .000086383683251, 	0.000000000000000, 	-1.311866980897721, 	0.000000000000000, 	1.840007477574986, 	0.000000000000000, 	-3.253005768451345, 	0.000000000000000,
 .462584328739432, 	0.000000000000000, 	1.610103610851738, 	0.000000000000000, 	0.761914676858907, 	0.000000000000000, 	0.974541361089834, 	0.000000000000000,
 .686845845885983, 	0.000000000000000, 	1.849153122025191, 	0.000000000000000, 	0.787800410401453, 	0.000000000000000, 	-1.187438909666279, 	0.000000000000000,
 -0.754937911044720, 	0.000000000000000, 	0.084373858395232, 	0.000000000000000, 	-2.600269011710521, 	0.000000000000000, 	-0.962982842142644, 	0.000000000000000,
 -0.369328108540868, 	0.000000000000000, 	0.810791418361879, 	0.000000000000000, 	3.587016488699641, 	0.000000000000000, 	-0.520776145083723, 	0.000000000000000,
 .640249919627884, 	0.000000000000000, 	1.103122489464969, 	0.000000000000000, 	2.231779881455556, 	0.000000000000000, 	-1.308035392685241, 	0.000000000000000,
 .424070304330106, 	0.000000000000000, 	-0.200383932651189, 	0.000000000000000, 	-2.365526783356541, 	0.000000000000000, 	-0.989114757436628, 	0.000000000000000,
 .770807688959777, 	0.000000000000000, 	-0.444172737462307, 	0.000000000000000, 	0.079760979374078, 	0.000000000000000, 	-0.005199118412183, 	0.000000000000000,
 -0.664712668309527, 	0.000000000000000, 	-0.624171857561896, 	0.000000000000000, 	0.537306979007338, 	0.000000000000000, 	-2.575955675497642, 	0.000000000000000,
 .562363235756780, 	0.000000000000000, 	1.814069369848895, 	0.000000000000000, 	-1.293428583392509, 	0.000000000000000, 	-1.026188449495686, 	0.000000000000000,
 -2.981771815588717, 	0.000000000000000, 	-4.223468103075124, 	0.000000000000000, 	2.672674782004045, 	0.000000000000000, 	-0.856096801117735, 	0.000000000000000,
 .048517345512563, 	0.000000000000000, 	-0.026860721136222, 	0.000000000000000, 	0.392932277758187, 	0.000000000000000, 	-1.331740855093099, 	0.000000000000000,
 -1.894292129477081, 	0.000000000000000, 	-1.425006468460681, 	0.000000000000000, 	-2.721772427617057, 	0.000000000000000, 	-1.616831100216806, 	0.000000000000000,
 .551177651488947, 	0.000000000000000, 	-0.069685667896087, 	0.000000000000000, 	-3.134634907409102, 	0.000000000000000, 	-0.263627598944639, 	0.000000000000000,
 -1.650469945991350, 	0.000000000000000, 	-2.203580339374399, 	0.000000000000000, 	-0.872203246123242, 	0.000000000000000, 	1.230782812607287, 	0.000000000000000,
 .257288860093291, 	0.000000000000000, 	1.989083106173137, 	0.000000000000000, 	-1.985638729453261, 	0.000000000000000, 	-1.416185105842892, 	0.000000000000000,
 -1.131097688325772, 	0.000000000000000, 	-2.245130805416057, 	0.000000000000000, 	-1.938873996219074, 	0.000000000000000, 	2.043608361562645, 	0.000000000000000,
 -0.583727989880841, 	0.000000000000000, 	-1.785266378212929, 	0.000000000000000, 	1.961457586224753, 	0.000000000000000, 	1.139400099963223, 	0.000000000000000,
 -1.979519343363991, 	0.000000000000000, 	2.003023322818429, 	0.000000000000000, 	0.229004069076829, 	0.000000000000000, 	3.452808862193135, 	0.000000000000000,
 .882273808365857, 	0.000000000000000, 	-1.549450501844438, 	0.000000000000000, 	-3.283872089931876, 	0.000000000000000, 	-0.327025884099064, 	0.000000000000000,
 -0.054979977136430, 	0.000000000000000, 	-1.192280531479012, 	0.000000000000000, 	0.645539328365578, 	0.000000000000000, 	2.300832863404618, 	0.000000000000000,
 -1.092951789535240, 	0.000000000000000, 	-1.017368249363773, 	0.000000000000000, 	-0.142673056169787, 	0.000000000000000, 	0.831073544881250, 	0.000000000000000,
 -2.314612531587064, 	0.000000000000000, 	-2.221456299106321, 	0.000000000000000, 	0.460261143885226, 	0.000000000000000, 	0.050585301888595, 	0.000000000000000,
 .364373329183988, 	0.000000000000000, 	-1.685956552069538, 	0.000000000000000, 	0.050664512351055, 	0.000000000000000, 	-0.193355783902718, 	0.000000000000000,
 -0.158660446046828, 	0.000000000000000, 	2.394156453841953, 	0.000000000000000, 	-1.562965718554525, 	0.000000000000000, 	-2.199750600869900, 	0.000000000000000,
 .544984022381773, 	0.000000000000000, 	-1.988307216807315, 	0.000000000000000, 	-0.628240722541046, 	0.000000000000000, 	-1.436235771505429, 	0.000000000000000,
 .677013691147313, 	0.000000000000000, 	1.600741781678228, 	0.000000000000000, 	-0.757380959134706, 	0.000000000000000, 	-4.784797439515566, 	0.000000000000000,
 .265121462834569, 	0.000000000000000, 	3.862029485934378, 	0.000000000000000, 	2.386823577249430, 	0.000000000000000, 	-3.655779745436893, 	0.000000000000000,
 -0.763541621368016, 	0.000000000000000, 	-1.182140388432962, 	0.000000000000000, 	-1.349106114858063, 	0.000000000000000, 	-2.287533624396759, 	0.000000000000000,
 -0.028603745188423, 	0.000000000000000, 	-1.353580755934427, 	0.000000000000000, 	0.461602380352937, 	0.000000000000000, 	-0.059599055078928, 	0.000000000000000,
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 };

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/ARM/arm_fft_bin_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:	     arm_fft_bin_example_f32.c
+*
 * Description:   Example code demonstrating calculation of Max energy bin of
 *                frequency domain of input signal.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup FrequencyBin Frequency Bin Example
+ *
  * \par Description
  * \par
  * Demonstrates the calculation of the maximum energy bin in the frequency
  * domain of the input signal with the use of Complex FFT, Complex
  * Magnitude, and Maximum functions.
+ *
  * \par Algorithm:
  * \par
  * The input test signal contains a 10 kHz signal with uniformly distributed white noise.
  * Calculating the FFT of the input signal will give us the maximum energy of the
  * bin corresponding to the input frequency of 10 kHz.
+ *
  * \par Block Diagram:
  * \image html FFTBin.gif "Block Diagram"
  * \par
  * The figure below shows the time domain signal of 10 kHz signal with
  * uniformly distributed white noise, and the next figure shows the input
  * in the frequency domain. The bin with maximum energy corresponds to 10 kHz signal.
  * \par
  * \image html FFTBinInput.gif "Input signal in Time domain"
  * \image html FFTBinOutput.gif "Input signal in Frequency domain"
+ *
  * \par Variables Description:
  * \par
  * \li \c testInput_f32_10khz points to the input data
  * \li \c testOutput points to the output data
  * \li \c fftSize length of FFT
  * \li \c ifftFlag flag for the selection of CFFT/CIFFT
  * \li \c doBitReverse Flag for selection of normal order or bit reversed order
  * \li \c refIndex reference index value at which maximum energy of bin ocuurs
  * \li \c testIndex calculated index value at which maximum energy of bin ocuurs
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_cfft_f32()
  * - arm_cmplx_mag_f32()
  * - arm_max_f32()
+ *
  * <b> Refer  </b>
  * \link arm_fft_bin_example_f32.c \endlink
+ *
  */
 /** \example arm_fft_bin_example_f32.c
   */
 #include "arm_math.h"
 #include "arm_const_structs.h"
 #define TEST_LENGTH_SAMPLES 2048
 /* -------------------------------------------------------------------
 * External Input and Output buffer Declarations for FFT Bin Example
 * ------------------------------------------------------------------- */
 extern float32_t testInput_f32_10khz[TEST_LENGTH_SAMPLES];
 static float32_t testOutput[TEST_LENGTH_SAMPLES/2];
 /* ------------------------------------------------------------------
 * Global variables for FFT Bin Example
 * ------------------------------------------------------------------- */
 uint32_t fftSize = 1024;
 uint32_t ifftFlag = 0;
 uint32_t doBitReverse = 1;
 /* Reference index at which max energy of bin ocuurs */
 uint32_t refIndex = 213, testIndex = 0;
 /* ----------------------------------------------------------------------
 * Max magnitude FFT Bin test
 * ------------------------------------------------------------------- */
 int32_t main(void)
+{
   arm_status status;
   float32_t maxValue;
   status = ARM_MATH_SUCCESS;
   /* Process the data through the CFFT/CIFFT module */
   arm_cfft_f32(&arm_cfft_sR_f32_len1024, testInput_f32_10khz, ifftFlag, doBitReverse);
   /* Process the data through the Complex Magnitude Module for
   calculating the magnitude at each bin */
   arm_cmplx_mag_f32(testInput_f32_10khz, testOutput, fftSize);
   /* Calculates maxValue and returns corresponding BIN value */
   arm_max_f32(testOutput, fftSize, &maxValue, &testIndex);
   if(testIndex !=  refIndex)
+  {
     status = ARM_MATH_TEST_FAILURE;
+  }
   /* ----------------------------------------------------------------------
   ** Loop here if the signals fail the PASS check.
   ** This denotes a test failure
   ** ------------------------------------------------------------------- */
   if( status != ARM_MATH_SUCCESS)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/GCC/arm_fft_bin_data.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
 * Title:	     	arm_fft_bin_data.c
+*
 * Description:	 Data file used for example code
+*
 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 #include "arm_math.h"
 /* ----------------------------------------------------------------------
 Test Input signal contains 10KHz signal + Uniformly distributed white noise
 ** ------------------------------------------------------------------- */
 float32_t testInput_f32_10khz[2048] =
+{
 -0.865129623056441, 	0.000000000000000, 	-2.655020678073846, 	0.000000000000000, 	0.600664612949661, 	0.000000000000000, 	0.080378093886515, 	0.000000000000000,
 -2.899160484012034, 	0.000000000000000, 	2.563004262857762, 	0.000000000000000, 	3.078328403304206, 	0.000000000000000, 	0.105906778385130, 	0.000000000000000,
 .048366940168201, 	0.000000000000000, 	-0.145696461188734, 	0.000000000000000, 	-0.023417155362879, 	0.000000000000000, 	2.127729174988954, 	0.000000000000000,
 -1.176633086028377, 	0.000000000000000, 	3.690223557991855, 	0.000000000000000, 	-0.622791766173194, 	0.000000000000000, 	0.722837373872203, 	0.000000000000000,
 .739754205367484, 	0.000000000000000, 	-0.062610410524552, 	0.000000000000000, 	-0.891296810967338, 	0.000000000000000, 	-1.845872258871811, 	0.000000000000000,
 .195039415434387, 	0.000000000000000, 	-2.177388969045026, 	0.000000000000000, 	1.078649103637905, 	0.000000000000000, 	2.570976050490193, 	0.000000000000000,
 -1.383551403404574, 	0.000000000000000, 	2.392141424058873, 	0.000000000000000, 	2.858002843205065, 	0.000000000000000, 	-3.682433899725536, 	0.000000000000000,
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 -4.341348988610527, 	0.000000000000000, 	0.557772429359965, 	0.000000000000000, 	-1.671267412948494, 	0.000000000000000, 	0.733951350960387, 	0.000000000000000,
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 .882273808365857, 	0.000000000000000, 	-1.549450501844438, 	0.000000000000000, 	-3.283872089931876, 	0.000000000000000, 	-0.327025884099064, 	0.000000000000000,
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 };

drivers/CMSIS/DSP_Lib/Examples/arm_fft_bin_example/GCC/arm_fft_bin_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
 * Title:	     arm_fft_bin_example_f32.c
+*
 * Description:   Example code demonstrating calculation of Max energy bin of
 *                frequency domain of input signal.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup FrequencyBin Frequency Bin Example
+ *
  * \par Description
  * \par
  * Demonstrates the calculation of the maximum energy bin in the frequency
  * domain of the input signal with the use of Complex FFT, Complex
  * Magnitude, and Maximum functions.
+ *
  * \par Algorithm:
  * \par
  * The input test signal contains a 10 kHz signal with uniformly distributed white noise.
  * Calculating the FFT of the input signal will give us the maximum energy of the
  * bin corresponding to the input frequency of 10 kHz.
+ *
  * \par Block Diagram:
  * \image html FFTBin.gif "Block Diagram"
  * \par
  * The figure below shows the time domain signal of 10 kHz signal with
  * uniformly distributed white noise, and the next figure shows the input
  * in the frequency domain. The bin with maximum energy corresponds to 10 kHz signal.
  * \par
  * \image html FFTBinInput.gif "Input signal in Time domain"
  * \image html FFTBinOutput.gif "Input signal in Frequency domain"
+ *
  * \par Variables Description:
  * \par
  * \li \c testInput_f32_10khz points to the input data
  * \li \c testOutput points to the output data
  * \li \c fftSize length of FFT
  * \li \c ifftFlag flag for the selection of CFFT/CIFFT
  * \li \c doBitReverse Flag for selection of normal order or bit reversed order
  * \li \c refIndex reference index value at which maximum energy of bin ocuurs
  * \li \c testIndex calculated index value at which maximum energy of bin ocuurs
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_cfft_f32()
  * - arm_cmplx_mag_f32()
  * - arm_max_f32()
+ *
  * <b> Refer  </b>
  * \link arm_fft_bin_example_f32.c \endlink
+ *
  */
 /** \example arm_fft_bin_example_f32.c
   */
 #include "arm_math.h"
 #include "arm_const_structs.h"
 #define TEST_LENGTH_SAMPLES 2048
 /* -------------------------------------------------------------------
 * External Input and Output buffer Declarations for FFT Bin Example
 * ------------------------------------------------------------------- */
 extern float32_t testInput_f32_10khz[TEST_LENGTH_SAMPLES];
 static float32_t testOutput[TEST_LENGTH_SAMPLES/2];
 /* ------------------------------------------------------------------
 * Global variables for FFT Bin Example
 * ------------------------------------------------------------------- */
 uint32_t fftSize = 1024;
 uint32_t ifftFlag = 0;
 uint32_t doBitReverse = 1;
 /* Reference index at which max energy of bin ocuurs */
 uint32_t refIndex = 213, testIndex = 0;
 /* ----------------------------------------------------------------------
 * Max magnitude FFT Bin test
 * ------------------------------------------------------------------- */
 int32_t main(void)
+{
   arm_status status;
   float32_t maxValue;
   status = ARM_MATH_SUCCESS;
   /* Process the data through the CFFT/CIFFT module */
   arm_cfft_f32(&arm_cfft_sR_f32_len1024, testInput_f32_10khz, ifftFlag, doBitReverse);
   /* Process the data through the Complex Magnitude Module for
   calculating the magnitude at each bin */
   arm_cmplx_mag_f32(testInput_f32_10khz, testOutput, fftSize);
   /* Calculates maxValue and returns corresponding BIN value */
   arm_max_f32(testOutput, fftSize, &maxValue, &testIndex);
   if(testIndex !=  refIndex)
+  {
     status = ARM_MATH_TEST_FAILURE;
+  }
   /* ----------------------------------------------------------------------
   ** Loop here if the signals fail the PASS check.
   ** This denotes a test failure
   ** ------------------------------------------------------------------- */
   if( status != ARM_MATH_SUCCESS)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
  /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/arm_fir_data.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
 * Title:	     	arm_fir_data.c
+*
 * Description:	 Data file used for example code
+*
 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 #include "arm_math.h"
 /* ----------------------------------------------------------------------
 ** Test input signal contains 1000Hz + 15000 Hz
 ** ------------------------------------------------------------------- */
 float32_t testInput_f32_1kHz_15kHz[320] =
+{
 +0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
 +0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
 +0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
 -0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
 -0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
 -0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
 +0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
 +0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
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 -0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
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 +0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
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 };
 float32_t refOutput[320] =
+{
 +0.0000000000f, -0.0010797829f, -0.0007681386f, -0.0001982932f, +0.0000644313f, +0.0020854271f, +0.0036891871f, +0.0015855941f,
 -0.0026280805f, -0.0075907658f, -0.0119390538f, -0.0086665968f, +0.0088981202f, +0.0430539279f, +0.0974468742f, +0.1740405600f,
 +0.2681416601f, +0.3747720089f, +0.4893362230f, +0.6024154672f, +0.7058740791f, +0.7968348987f, +0.8715901940f, +0.9277881093f,
 +0.9682182661f, +0.9934674267f, +1.0012052245f, +0.9925859371f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
 +0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, -0.0000000000f, -0.1309866321f,
 -0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
 -0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
 -0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
 +0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
 +0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
 +0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, -0.0000000000f, -0.1309866321f,
 -0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
 -0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
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 -0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
 +0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
 +0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
 +0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
 -0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
 -0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
 -0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
 +0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
 +0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
 +0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
 -0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
 -0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
 -0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, -0.0000000000f, +0.1309866321f,
 +0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
 +0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
 +0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
 -0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
 -0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
 -0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
 +0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
 +0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f
 };

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/arm_fir_example_f32.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
  * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+ *
 * $Date:         17. January 2013
 * $Revision:     V1.4.0
+*
 * Project:       CMSIS DSP Library
  * Title:        arm_fir_example_f32.c
+ *
  * Description:  Example code demonstrating how an FIR filter can be used
  *               as a low pass filter.
+ *
  * Target Processor: Cortex-M4/Cortex-M3
+ *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
  * -------------------------------------------------------------------- */
 /**
  * @ingroup groupExamples
  */
 /**
  * @defgroup FIRLPF FIR Lowpass Filter Example
+ *
  * \par Description:
  * \par
  * Removes high frequency signal components from the input using an FIR lowpass filter.
  * The example demonstrates how to configure an FIR filter and then pass data through
  * it in a block-by-block fashion.
  * \image html FIRLPF_signalflow.gif
+ *
  * \par Algorithm:
  * \par
  * The input signal is a sum of two sine waves:  1 kHz and 15 kHz.
  * This is processed by an FIR lowpass filter with cutoff frequency 6 kHz.
  * The lowpass filter eliminates the 15 kHz signal leaving only the 1 kHz sine wave at the output.
  * \par
  * The lowpass filter was designed using MATLAB with a sample rate of 48 kHz and
  * a length of 29 points.
  * The MATLAB code to generate the filter coefficients is shown below:
  * <pre>
  *     h = fir1(28, 6/24);
  * </pre>
  * The first argument is the "order" of the filter and is always one less than the desired length.
  * The second argument is the normalized cutoff frequency.  This is in the range 0 (DC) to 1.0 (Nyquist).
  * A 6 kHz cutoff with a Nyquist frequency of 24 kHz lies at a normalized frequency of 6/24 = 0.25.
  * The CMSIS FIR filter function requires the coefficients to be in time reversed order.
  * <pre>
  *     fliplr(h)
  * </pre>
  * The resulting filter coefficients and are shown below.
  * Note that the filter is symmetric (a property of linear phase FIR filters)
  * and the point of symmetry is sample 14.  Thus the filter will have a delay of
  * 14 samples for all frequencies.
  * \par
  * \image html FIRLPF_coeffs.gif
  * \par
  * The frequency response of the filter is shown next.
  * The passband gain of the filter is 1.0 and it reaches 0.5 at the cutoff frequency 6 kHz.
  * \par
  * \image html FIRLPF_response.gif
  * \par
  * The input signal is shown below.
  * The left hand side shows the signal in the time domain while the right hand side is a frequency domain representation.
  * The two sine wave components can be clearly seen.
  * \par
  * \image html FIRLPF_input.gif
  * \par
  * The output of the filter is shown below.  The 15 kHz component has been eliminated.
  * \par
  * \image html FIRLPF_output.gif
+ *
  * \par Variables Description:
  * \par
  * \li \c testInput_f32_1kHz_15kHz points to the input data
  * \li \c refOutput points to the reference output data
  * \li \c testOutput points to the test output data
  * \li \c firStateF32 points to state buffer
  * \li \c firCoeffs32 points to coefficient buffer
  * \li \c blockSize number of samples processed at a time
  * \li \c numBlocks number of frames
+ *
  * \par CMSIS DSP Software Library Functions Used:
  * \par
  * - arm_fir_init_f32()
  * - arm_fir_f32()
+ *
  * <b> Refer  </b>
  * \link arm_fir_example_f32.c \endlink
+ *
  */
 /** \example arm_fir_example_f32.c
  */
 /* ----------------------------------------------------------------------
 ** Include Files
 ** ------------------------------------------------------------------- */
 #include "arm_math.h"
 #include "math_helper.h"
 /* ----------------------------------------------------------------------
 ** Macro Defines
 ** ------------------------------------------------------------------- */
 #define TEST_LENGTH_SAMPLES  320
 #define SNR_THRESHOLD_F32    140.0f
 #define BLOCK_SIZE            32
 #define NUM_TAPS              29
 /* -------------------------------------------------------------------
  * The input signal and reference output (computed with MATLAB)
  * are defined externally in arm_fir_lpf_data.c.
  * ------------------------------------------------------------------- */
 extern float32_t testInput_f32_1kHz_15kHz[TEST_LENGTH_SAMPLES];
 extern float32_t refOutput[TEST_LENGTH_SAMPLES];
 /* -------------------------------------------------------------------
  * Declare Test output buffer
  * ------------------------------------------------------------------- */
 static float32_t testOutput[TEST_LENGTH_SAMPLES];
 /* -------------------------------------------------------------------
  * Declare State buffer of size (numTaps + blockSize - 1)
  * ------------------------------------------------------------------- */
 static float32_t firStateF32[BLOCK_SIZE + NUM_TAPS - 1];
 /* ----------------------------------------------------------------------
 ** FIR Coefficients buffer generated using fir1() MATLAB function.
 ** fir1(28, 6/24)
 ** ------------------------------------------------------------------- */
 const float32_t firCoeffs32[NUM_TAPS] = {
   -0.0018225230f, -0.0015879294f, +0.0000000000f, +0.0036977508f, +0.0080754303f, +0.0085302217f, -0.0000000000f, -0.0173976984f,
   -0.0341458607f, -0.0333591565f, +0.0000000000f, +0.0676308395f, +0.1522061835f, +0.2229246956f, +0.2504960933f, +0.2229246956f,
   +0.1522061835f, +0.0676308395f, +0.0000000000f, -0.0333591565f, -0.0341458607f, -0.0173976984f, -0.0000000000f, +0.0085302217f,
   +0.0080754303f, +0.0036977508f, +0.0000000000f, -0.0015879294f, -0.0018225230f
 };
 /* ------------------------------------------------------------------
  * Global variables for FIR LPF Example
  * ------------------------------------------------------------------- */
 uint32_t blockSize = BLOCK_SIZE;
 uint32_t numBlocks = TEST_LENGTH_SAMPLES/BLOCK_SIZE;
 float32_t  snr;
 /* ----------------------------------------------------------------------
  * FIR LPF Example
  * ------------------------------------------------------------------- */
 int32_t main(void)
+{
   uint32_t i;
   arm_fir_instance_f32 S;
   arm_status status;
   float32_t  *inputF32, *outputF32;
   /* Initialize input and output buffer pointers */
   inputF32 = &testInput_f32_1kHz_15kHz[0];
   outputF32 = &testOutput[0];
   /* Call FIR init function to initialize the instance structure. */
   arm_fir_init_f32(&S, NUM_TAPS, (float32_t *)&firCoeffs32[0], &firStateF32[0], blockSize);
   /* ----------------------------------------------------------------------
   ** Call the FIR process function for every blockSize samples
   ** ------------------------------------------------------------------- */
   for(i=0; i < numBlocks; i++)
+  {
     arm_fir_f32(&S, inputF32 + (i * blockSize), outputF32 + (i * blockSize), blockSize);
+  }
   /* ----------------------------------------------------------------------
   ** Compare the generated output against the reference output computed
   ** in MATLAB.
   ** ------------------------------------------------------------------- */
   snr = arm_snr_f32(&refOutput[0], &testOutput[0], TEST_LENGTH_SAMPLES);
   if (snr < SNR_THRESHOLD_F32)
+  {
     status = ARM_MATH_TEST_FAILURE;
+  }
   else
+  {
     status = ARM_MATH_SUCCESS;
+  }
   /* ----------------------------------------------------------------------
   ** Loop here if the signal does not match the reference output.
   ** ------------------------------------------------------------------- */
   if( status != ARM_MATH_SUCCESS)
+  {
     while(1);
+  }
   while(1);                             /* main function does not return */
+}
 /** \endlink */

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/math_helper.c

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.c
+*
 * Description:	Definition of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 /* ----------------------------------------------------------------------
 *		Include standard header files
 * -------------------------------------------------------------------- */
 #include<math.h>
 /* ----------------------------------------------------------------------
 *		Include project header files
 * -------------------------------------------------------------------- */
 #include "math_helper.h"
 /**
  * @brief  Caluclation of SNR
  * @param  float* 	Pointer to the reference buffer
  * @param  float*	Pointer to the test buffer
  * @param  uint32_t	total number of samples
  * @return float	SNR
  * The function Caluclates signal to noise ratio for the reference output
  * and test output
  */
 float arm_snr_f32(float *pRef, float *pTest, uint32_t buffSize)
+{
   float EnergySignal = 0.0, EnergyError = 0.0;
   uint32_t i;
   float SNR;
   int temp;
   int *test;
   for (i = 0; i < buffSize; i++)
+    {
  	  /* Checking for a NAN value in pRef array */
 	  test =   (int *)(&pRef[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
 	  /* Checking for a NAN value in pTest array */
 	  test =   (int *)(&pTest[i]);
       temp =  *test;
 	  if(temp == 0x7FC00000)
+	  {
 	  		return(0);
+	  }
       EnergySignal += pRef[i] * pRef[i];
       EnergyError += (pRef[i] - pTest[i]) * (pRef[i] - pTest[i]);
+    }
 	/* Checking for a NAN value in EnergyError */
 	test =   (int *)(&EnergyError);
     temp =  *test;
     if(temp == 0x7FC00000)
+    {
   		return(0);
+    }
   SNR = 10 * log10 (EnergySignal / EnergyError);
   return (SNR);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q15_t* 	    Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q15 (q15_t * input_buf, uint32_t blockSize,
                             uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Converts float to fixed in q12.20 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point(q12.20) values
  */
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1048576.0f corresponds to pow(2, 20) */
       pOut[i] = (q31_t) (pIn[i] * 1048576.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 1.0)
+        {
           pOut[i] = 0x000FFFFF;
+        }
+    }
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q15_t* 	Pointer to Ref buffer
  * @param  q15_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Compare MATLAB Reference Output and ARM Test output
  * @param  q31_t* 	Pointer to Ref buffer
  * @param  q31_t* 	Pointer to Test buffer
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t * pOut, uint32_t numSamples)
+{
   uint32_t i;
   int32_t diff, diffCrnt = 0;
   uint32_t maxDiff = 0;
   for (i = 0; i < numSamples; i++)
+  {
   	diff = pIn[i] - pOut[i];
   	diffCrnt = (diff > 0) ? diff : -diff;
 	if(diffCrnt > maxDiff)
+	{
 		maxDiff = diffCrnt;
+	}
+  }
   return(maxDiff);
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q31 (q31_t * input_buf,
 								 uint32_t blockSize,
                                  uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Provide guard bits for Input buffer
  * @param  q31_t* 	Pointer to input buffer
  * @param  uint32_t 	blockSize
  * @param  uint32_t 	guard_bits
  * @return none
  * The function Provides the guard bits for the buffer
  * to avoid overflow
  */
 void arm_provide_guard_bits_q7 (q7_t * input_buf,
 								uint32_t blockSize,
                                 uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < blockSize; i++)
+    {
       input_buf[i] = input_buf[i] >> guard_bits;
+    }
+}
 /**
  * @brief  Caluclates number of guard bits
  * @param  uint32_t 	number of additions
  * @return none
  * The function Caluclates the number of guard bits
  * depending on the numtaps
  */
 uint32_t arm_calc_guard_bits (uint32_t num_adds)
+{
   uint32_t i = 1, j = 0;
   if (num_adds == 1)
+    {
       return (0);
+    }
   while (i < num_adds)
+    {
       i = i * 2;
       j++;
+    }
   return (j);
+}
 /**
  * @brief  Converts Q15 to floating-point
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  */
 void arm_apply_guard_bits (float32_t * pIn,
 						   uint32_t numSamples,
 						   uint32_t guard_bits)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       pIn[i] = pIn[i] * arm_calc_2pow(guard_bits);
+    }
+}
 /**
  * @brief  Calculates pow(2, numShifts)
  * @param  uint32_t 	number of shifts
  * @return pow(2, numShifts)
  */
 uint32_t arm_calc_2pow(uint32_t numShifts)
+{
   uint32_t i, val = 1;
   for (i = 0; i < numShifts; i++)
+    {
       val = val * 2;
+    }
   return(val);
+}
 /**
  * @brief  Converts float to fixed q14
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q14 (float *pIn, q15_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 16384.0f corresponds to pow(2, 14) */
       pOut[i] = (q15_t) (pIn[i] * 16384.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q30 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 1073741824.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 2.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q30 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q29 (float *pIn, q31_t * pOut,
 					   uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	  /* 1073741824.0f corresponds to pow(2, 30) */
       pOut[i] = (q31_t) (pIn[i] * 536870912.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 4.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Converts float to fixed q28 format
  * @param  uint32_t 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_float_to_q28 (float *pIn, q31_t * pOut,
                        uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
 	/* 268435456.0f corresponds to pow(2, 28) */
       pOut[i] = (q31_t) (pIn[i] * 268435456.0f);
       pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
       if (pIn[i] == (float) 8.0)
+        {
           pOut[i] = 0x7FFFFFFF;
+        }
+    }
+}
 /**
  * @brief  Clip the float values to +/- 1
  * @param  pIn 	input buffer
  * @param  numSamples 	number of samples in the buffer
  * @return none
  * The function converts floating point values to fixed point values
  */
 void arm_clip_f32 (float *pIn, uint32_t numSamples)
+{
   uint32_t i;
   for (i = 0; i < numSamples; i++)
+    {
       if(pIn[i] > 1.0f)
+	  {
 	    pIn[i] = 1.0;
+	  }
 	  else if( pIn[i] < -1.0f)
+	  {
 	    pIn[i] = -1.0;
+	  }
+    }
+}

drivers/CMSIS/DSP_Lib/Examples/arm_fir_example/ARM/math_helper.h

➞

Show inline comments

@@ new file 100644 @@
 /* ----------------------------------------------------------------------
 * Copyright (C) 2010-2013 ARM Limited. All rights reserved.
+*
 * $Date:        17. January 2013
 * $Revision: 	V1.4.0
+*
 * Project: 	    CMSIS DSP Library
+*
 * Title:	    math_helper.h
+*
 * Description:	Prototypes of all helper functions required.
+*
 * Target Processor: Cortex-M4/Cortex-M3
+*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   - Neither the name of ARM LIMITED nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
+*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * -------------------------------------------------------------------- */
 #include "arm_math.h"
 #ifndef MATH_HELPER_H
 #define MATH_HELPER_H
 float arm_snr_f32(float *pRef, float *pTest,  uint32_t buffSize);
 void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples);
 void arm_provide_guard_bits_q15(q15_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_provide_guard_bits_q31(q31_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
 void arm_float_to_q14(float *pIn, q15_t *pOut, uint32_t numSamples);
 void arm_float_to_q29(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q28(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_float_to_q30(float *pIn, q31_t *pOut, uint32_t numSamples);
 void arm_clip_f32(float *pIn, uint32_t numSamples);
 uint32_t arm_calc_guard_bits(uint32_t num_adds);
 void arm_apply_guard_bits (float32_t * pIn, uint32_t numSamples, uint32_t guard_bits);
 uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples);
 uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t *pOut, uint32_t numSamples);
 uint32_t arm_calc_2pow(uint32_t guard_bits);
 #endif

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