diff --git a/Makefile b/Makefile
new file mode 100644
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,109 @@
+
+TARGET:=Demonstration
+TOOLCHAIN_PATH:=/usr/bin
+TOOLCHAIN_PREFIX:=arm-none-eabi
+OPTLVL:=3 # Optimization level, can be [0, 1, 2, 3, s].
+
+#PROJECT_NAME:=$(notdir $(lastword $(CURDIR)))
+TOP:=$(shell readlink -f "../..")
+DISCOVERY:=$(TOP)/Utilities/STM32L100C-Discovery
+STMLIB:=$(TOP)/Libraries
+STD_PERIPH:=$(STMLIB)/STM32L1xx_StdPeriph_Driver
+STARTUP:=$(STMLIB)/CMSIS/Device/ST/STM32L1xx/Source/Templates/gcc_ride7
+LINKER_SCRIPT:=$(CURDIR)/stm32-flash.ld
+#LINKER_SCRIPT:=$(CURDIR)/../stm32_flash.ld
+
+INCLUDE=-I$(CURDIR)
+INCLUDE+=-I$(STMLIB)/CMSIS/Include
+INCLUDE+=-I$(STMLIB)/CMSIS/Device/ST/STM32L1xx/Include
+INCLUDE+=-I$(STD_PERIPH)/inc
+INCLUDE+=-I$(DISCOVERY)
+#INCLUDE+=-I$(STMLIB)/STM32_USB_OTG_Driver/inc
+#INCLUDE+=-I$(STMLIB)/STM32_USB_Device_Library/Class/hid/inc
+#INCLUDE+=-I$(STMLIB)/STM32_USB_Device_Library/Core/inc
+
+# vpath is used so object files are written to the current directory instead
+# of the same directory as their source files
+vpath %.c $(DISCOVERY) $(STD_PERIPH)/src \
+ $(STMLIB)/STM32_USB_OTG_Driver/src \
+ $(STMLIB)/STM32_USB_Device_Library/Class/hid/src \
+ $(STMLIB)/STM32_USB_Device_Library/Core/src
+vpath %.s $(STARTUP)
+
+ASRC=startup_stm32l1xx_mdp.s
+
+# Project Source Files
+SRC=main.c
+SRC+=stm32l1xx_it.c
+SRC+=system_stm32l1xx.c
+SRC+=stm32l100c_discovery.c
+
+# Discovery Source Files
+#SRC+=stm32f4_discovery_lis302dl.c
+#SRC+=stm32f4_discovery.c
+#SRC+=stm32f4_discovery_audio_codec.c
+
+# Standard Peripheral Source Files
+SRC+=stm32l1xx_syscfg.c
+SRC+=misc.c
+SRC+=stm32l1xx_adc.c
+SRC+=stm32l1xx_dac.c
+SRC+=stm32l1xx_dma.c
+SRC+=stm32l1xx_exti.c
+SRC+=stm32l1xx_flash.c
+SRC+=stm32l1xx_gpio.c
+SRC+=stm32l1xx_i2c.c
+SRC+=stm32l1xx_rcc.c
+SRC+=stm32l1xx_spi.c
+SRC+=stm32l1xx_tim.c
+
+# USB Source Files
+#SRC+=usb_dcd_int.c
+#SRC+=usb_core.c
+#SRC+=usb_dcd.c
+#SRC+=usbd_hid_core.c
+#SRC+=usbd_req.c
+#SRC+=usbd_core.c
+#SRC+=usbd_ioreq.c
+
+CDEFS=-DUSE_STDPERIPH_DRIVER
+CDEFS+=-DSTM32L1XX
+CDEFS+=-DMANGUSTA_DISCOVERY
+#CDEFS+=-DUSE_USB_OTG_FS
+CDEFS+=-DHSE_VALUE=8000000
+
+MCUFLAGS=-mcpu=cortex-m3 -mthumb
+#MCUFLAGS=-mcpu=cortex-m4 -mthumb -mlittle-endian -mfpu=fpa -mfloat-abi=hard -mthumb-interwork
+#MCUFLAGS=-mcpu=cortex-m4 -mfpu=vfpv4-sp-d16 -mfloat-abi=hard
+COMMONFLAGS=-O$(OPTLVL) -g -Wall
+CFLAGS=$(COMMONFLAGS) $(MCUFLAGS) $(INCLUDE) $(CDEFS)
+
+LDLIBS=
+LDFLAGS=$(COMMONFLAGS) -fno-exceptions -ffunction-sections -fdata-sections \
+ -nostartfiles -Wl,--gc-sections,-T$(LINKER_SCRIPT)
+
+#####
+#####
+
+OBJ = $(SRC:%.c=%.o) $(ASRC:%.s=%.o)
+
+CC=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gcc
+LD=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gcc
+OBJCOPY=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-objcopy
+AS=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-as
+AR=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-ar
+GDB=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gdb
+
+
+all: $(OBJ)
+ $(CC) -o $(TARGET).elf $(LDFLAGS) $(OBJ) $(LDLIBS)
+ $(OBJCOPY) -O ihex $(TARGET).elf $(TARGET).hex
+ $(OBJCOPY) -O binary $(TARGET).elf $(TARGET).bin
+
+.PHONY: clean
+
+clean:
+ rm -f $(OBJ)
+ rm -f $(TARGET).elf
+ rm -f $(TARGET).hex
+ rm -f $(TARGET).bin
diff --git a/main.c b/main.c
new file mode 100644
--- /dev/null
+++ b/main.c
@@ -0,0 +1,168 @@
+/**
+ ******************************************************************************
+ * @file main.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief Main program body
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+#include "stm32l100c_discovery.h"
+/** @addtogroup STM32L100C-Discovery_Demo
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+static __IO uint32_t TimingDelay;
+uint8_t BlinkSpeed = 0;
+
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/**
+ * @brief Main program.
+ * @param None
+ * @retval None
+ */
+int main(void)
+{
+ RCC_ClocksTypeDef RCC_Clocks;
+
+ /* Configure LED3 and LED4 on STM32L100C-Discovery */
+ STM_EVAL_LEDInit(LED3);
+ STM_EVAL_LEDInit(LED4);
+
+ /* Initialize User_Button on STM32L100C-Discovery */
+ STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_GPIO);
+
+ /* SysTick end of count event each 1ms */
+ RCC_GetClocksFreq(&RCC_Clocks);
+ SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
+
+ /* Initiate Blink Speed variable */
+ BlinkSpeed = 1;
+
+ while(1)
+ {
+ /* Check if the user button is pressed */
+ if(STM_EVAL_PBGetState(BUTTON_USER)== SET)
+ {
+ /* BlinkSpeed: 1 -> 2 -> 0, then re-cycle */
+ /* Turn on LD4 Blue LED during 1s each time User button is pressed */
+ STM_EVAL_LEDOn(LED4);
+
+ /* wait for 1s */
+ Delay(1000);
+
+ /* Turn off LD4 Blue LED after 1s each time User button is pressed */
+ STM_EVAL_LEDOff(LED4);
+
+ /* Increment the blink speed counter */
+ BlinkSpeed++;
+
+ /* Default value for blink speed counter */
+ if(BlinkSpeed == 3)
+ {
+ BlinkSpeed = 0;
+ }
+ }
+
+ /* Test on blink speed */
+ if(BlinkSpeed == 2)
+ {
+ /* LED3 toggles each 100 ms */
+ STM_EVAL_LEDToggle(LED3);
+
+ /* maintain LED3 status for 100ms */
+ Delay(100);
+ }
+ else if(BlinkSpeed == 1)
+ {
+ /* LED3 toggles each 200 ms */
+ STM_EVAL_LEDToggle(LED3);
+
+ /* maintain LED3 status for 200ms */
+ Delay(200);
+ }
+ else
+ {
+ /* LED3 Off */
+ STM_EVAL_LEDOff(LED3);
+ }
+ }
+}
+
+/**
+ * @brief Inserts a delay time.
+ * @param nTime: specifies the delay time length, in 1 ms.
+ * @retval None
+ */
+void Delay(__IO uint32_t nTime)
+{
+ TimingDelay = nTime;
+
+ while(TimingDelay != 0);
+}
+
+/**
+ * @brief Decrements the TimingDelay variable.
+ * @param None
+ * @retval None
+ */
+void TimingDelay_Decrement(void)
+{
+ if (TimingDelay != 0x00)
+ {
+ TimingDelay--;
+ }
+}
+
+#ifdef USE_FULL_ASSERT
+
+/**
+ * @brief Reports the name of the source file and the source line number
+ * where the assert_param error has occurred.
+ * @param file: pointer to the source file name
+ * @param line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+ /* User can add his own implementation to report the file name and line number,
+ ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+ /* Infinite loop */
+ while (1)
+ {}
+}
+#endif
+
+/**
+ * @}
+ */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/main.h b/main.h
new file mode 100644
--- /dev/null
+++ b/main.h
@@ -0,0 +1,45 @@
+/**
+ ******************************************************************************
+ * @file main.h
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief Header for main.c module
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAIN_H
+#define __MAIN_H
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l1xx.h"
+#include "stm32l100c_discovery.h"
+/* Exported types ------------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+void TimingDelay_Decrement(void);
+void Delay(__IO uint32_t nTime);
+
+#endif /* __MAIN_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/stm32-flash.ld b/stm32-flash.ld
new file mode 100644
--- /dev/null
+++ b/stm32-flash.ld
@@ -0,0 +1,173 @@
+/*
+*****************************************************************************
+**
+** File : STM32-FLASH.ld
+**
+** Abstract : Linker script for STM32L100xC Device with
+** 256KByte FLASH and 16KByte RAM
+**
+** Set heap size, stack size and stack location according
+** to application requirements.
+**
+** Set memory bank area and size if external memory is used.
+**
+** Target : STMicroelectronics STM32
+**
+** Environment : Atollic TrueSTUDIO(R)
+**
+** Distribution: The file is distributed "as is," without any warranty
+** of any kind.
+**
+** (c)Copyright Atollic AB.
+** You may use this file as-is or modify it according to the needs of your
+** project. Distribution of this file (unmodified or modified) is not
+** permitted. Atollic AB permit registered Atollic TrueSTUDIO(R) users the
+** rights to distribute the assembled, compiled & linked contents of this
+** file as part of an application binary file, provided that it is built
+** using the Atollic TrueSTUDIO(R) toolchain.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = 0x20004000; /* end of 16K RAM */
+
+/* Generate a link error if heap and stack don't fit into RAM */
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Specify the memory areas */
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 16K
+ MEMORY_B1 (rx) : ORIGIN = 0x60000000, LENGTH = 0K
+}
+
+/* Define output sections */
+SECTIONS
+{
+ /* The startup code goes first into FLASH */
+ .isr_vector :
+ {
+ . = ALIGN(4);
+ KEEP(*(.isr_vector)) /* Startup code */
+ . = ALIGN(4);
+ } >FLASH
+
+ /* The program code and other data goes into FLASH */
+ .text :
+ {
+ . = ALIGN(4);
+ *(.text) /* .text sections (code) */
+ *(.text*) /* .text* sections (code) */
+ *(.rodata) /* .rodata sections (constants, strings, etc.) */
+ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
+ *(.glue_7) /* glue arm to thumb code */
+ *(.glue_7t) /* glue thumb to arm code */
+
+ KEEP (*(.init))
+ KEEP (*(.fini))
+
+ . = ALIGN(4);
+ _etext = .; /* define a global symbols at end of code */
+ } >FLASH
+
+
+ .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
+ .ARM : {
+ __exidx_start = .;
+ *(.ARM.exidx*)
+ __exidx_end = .;
+ } >FLASH
+
+/* .ARM.attributes : { *(.ARM.attributes) } > FLASH */
+
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array*))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ } >FLASH
+ .init_array :
+ {
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array*))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ } >FLASH
+ .fini_array :
+ {
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(.fini_array*))
+ KEEP (*(SORT(.fini_array.*)))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ } >FLASH
+
+ /* used by the startup to initialize data */
+ _sidata = .;
+
+ /* Initialized data sections goes into RAM, load LMA copy after code */
+ .data : AT ( _sidata )
+ {
+ . = ALIGN(4);
+ _sdata = .; /* create a global symbol at data start */
+ *(.data) /* .data sections */
+ *(.data*) /* .data* sections */
+
+ . = ALIGN(4);
+ _edata = .; /* define a global symbol at data end */
+ } >RAM
+
+ /* Uninitialized data section */
+ . = ALIGN(4);
+ .bss :
+ {
+ /* This is used by the startup in order to initialize the .bss secion */
+ _sbss = .; /* define a global symbol at bss start */
+ __bss_start__ = _sbss;
+ *(.bss)
+ *(.bss*)
+ *(COMMON)
+
+ . = ALIGN(4);
+ _ebss = .; /* define a global symbol at bss end */
+ __bss_end__ = _ebss;
+ } >RAM
+
+ PROVIDE ( end = _ebss );
+ PROVIDE ( _end = _ebss );
+
+ /* User_heap_stack section, used to check that there is enough RAM left */
+ ._user_heap_stack :
+ {
+ . = ALIGN(4);
+ . = . + _Min_Heap_Size;
+ . = . + _Min_Stack_Size;
+ . = ALIGN(4);
+ } >RAM
+
+ /* MEMORY_bank1 section, code must be located here explicitly */
+ /* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
+ .memory_b1_text :
+ {
+ *(.mb1text) /* .mb1text sections (code) */
+ *(.mb1text*) /* .mb1text* sections (code) */
+ *(.mb1rodata) /* read-only data (constants) */
+ *(.mb1rodata*)
+ } >MEMORY_B1
+
+ /* Remove information from the standard libraries */
+ /DISCARD/ :
+ {
+ libc.a ( * )
+ libm.a ( * )
+ libgcc.a ( * )
+ }
+
+ .ARM.attributes 0 : { *(.ARM.attributes) }
+
+}
diff --git a/stm32l1xx_conf.h b/stm32l1xx_conf.h
new file mode 100644
--- /dev/null
+++ b/stm32l1xx_conf.h
@@ -0,0 +1,85 @@
+/**
+ ******************************************************************************
+ * @file stm32l1xx_conf.h
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief Library configuration file.
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32L1xx_CONF_H
+#define __STM32L1xx_CONF_H
+
+/* Includes ------------------------------------------------------------------*/
+/* Uncomment/Comment the line below to enable/disable peripheral header file inclusion */
+#include "stm32l1xx_adc.h"
+#include "stm32l1xx_aes.h"
+#include "stm32l1xx_comp.h"
+#include "stm32l1xx_crc.h"
+#include "stm32l1xx_dac.h"
+#include "stm32l1xx_dbgmcu.h"
+#include "stm32l1xx_dma.h"
+#include "stm32l1xx_exti.h"
+#include "stm32l1xx_flash.h"
+#include "stm32l1xx_fsmc.h"
+#include "stm32l1xx_gpio.h"
+#include "stm32l1xx_i2c.h"
+#include "stm32l1xx_iwdg.h"
+#include "stm32l1xx_lcd.h"
+#include "stm32l1xx_opamp.h"
+#include "stm32l1xx_pwr.h"
+#include "stm32l1xx_rcc.h"
+#include "stm32l1xx_rtc.h"
+#include "stm32l1xx_sdio.h"
+#include "stm32l1xx_spi.h"
+#include "stm32l1xx_syscfg.h"
+#include "stm32l1xx_tim.h"
+#include "stm32l1xx_usart.h"
+#include "stm32l1xx_wwdg.h"
+#include "misc.h" /* High level functions for NVIC and SysTick (add-on to CMSIS functions) */
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Uncomment the line below to expanse the "assert_param" macro in the
+ Standard Peripheral Library drivers code */
+/* #define USE_FULL_ASSERT 1 */
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef USE_FULL_ASSERT
+
+/**
+ * @brief The assert_param macro is used for function's parameters check.
+ * @param expr: If expr is false, it calls assert_failed function which reports
+ * the name of the source file and the source line number of the call
+ * that failed. If expr is true, it returns no value.
+ * @retval None
+ */
+ #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+ void assert_failed(uint8_t* file, uint32_t line);
+#else
+ #define assert_param(expr) ((void)0)
+#endif /* USE_FULL_ASSERT */
+
+#endif /* __STM32L1xx_CONF_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/stm32l1xx_it.c b/stm32l1xx_it.c
new file mode 100644
--- /dev/null
+++ b/stm32l1xx_it.c
@@ -0,0 +1,168 @@
+/**
+ ******************************************************************************
+ * @file stm32l1xx_it.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief Main Interrupt Service Routines.
+ * This file provides template for all exceptions handler and
+ * peripherals interrupt service routine.
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l1xx_it.h"
+#include "main.h"
+
+/** @addtogroup STM32L100C-Discovery_Demo
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/******************************************************************************/
+/* Cortex-M3 Processor Exceptions Handlers */
+/******************************************************************************/
+
+/**
+ * @brief This function handles NMI exception.
+ * @param None
+ * @retval None
+ */
+void NMI_Handler(void)
+{
+}
+
+/**
+ * @brief This function handles Hard Fault exception.
+ * @param None
+ * @retval None
+ */
+void HardFault_Handler(void)
+{
+ /* Go to infinite loop when Hard Fault exception occurs */
+ while (1)
+ {
+ }
+}
+
+/**
+ * @brief This function handles Memory Manage exception.
+ * @param None
+ * @retval None
+ */
+void MemManage_Handler(void)
+{
+ /* Go to infinite loop when Memory Manage exception occurs */
+ while (1)
+ {
+ }
+}
+
+/**
+ * @brief This function handles Bus Fault exception.
+ * @param None
+ * @retval None
+ */
+void BusFault_Handler(void)
+{
+ /* Go to infinite loop when Bus Fault exception occurs */
+ while (1)
+ {
+ }
+}
+
+/**
+ * @brief This function handles Usage Fault exception.
+ * @param None
+ * @retval None
+ */
+void UsageFault_Handler(void)
+{
+ /* Go to infinite loop when Usage Fault exception occurs */
+ while (1)
+ {
+ }
+}
+
+/**
+ * @brief This function handles SVCall exception.
+ * @param None
+ * @retval None
+ */
+void SVC_Handler(void)
+{
+}
+
+/**
+ * @brief This function handles Debug Monitor exception.
+ * @param None
+ * @retval None
+ */
+void DebugMon_Handler(void)
+{
+}
+
+/**
+ * @brief This function handles PendSVC exception.
+ * @param None
+ * @retval None
+ */
+void PendSV_Handler(void)
+{
+}
+
+/**
+ * @brief This function handles SysTick Handler.
+ * @param None
+ * @retval None
+ */
+void SysTick_Handler(void)
+{
+ TimingDelay_Decrement();
+}
+
+/******************************************************************************/
+/* STM32L1xx Peripherals Interrupt Handlers */
+/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
+/* available peripheral interrupt handler's name please refer to the startup */
+/* file (startup_stm32l1xx_xx.s). */
+/******************************************************************************/
+
+/**
+ * @brief This function handles PPP interrupt request.
+ * @param None
+ * @retval None
+ */
+/*void PPP_IRQHandler(void)
+{
+}*/
+
+/**
+ * @}
+ */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/stm32l1xx_it.h b/stm32l1xx_it.h
new file mode 100644
--- /dev/null
+++ b/stm32l1xx_it.h
@@ -0,0 +1,60 @@
+/**
+ ******************************************************************************
+ * @file stm32l1xx_it.h
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief This file contains the headers of the interrupt handlers.
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32L1xx_IT_H
+#define __STM32L1xx_IT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l1xx.h"
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void MemManage_Handler(void);
+void BusFault_Handler(void);
+void UsageFault_Handler(void);
+void SVC_Handler(void);
+void DebugMon_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32L1xx_IT_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/system_stm32l1xx.c b/system_stm32l1xx.c
new file mode 100644
--- /dev/null
+++ b/system_stm32l1xx.c
@@ -0,0 +1,396 @@
+/**
+ ******************************************************************************
+ * @file system_stm32l1xx.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 29-July-2013
+ * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
+ * This file contains the system clock configuration for STM32L1xx Ultra
+ * Low power devices, and is generated by the clock configuration
+ * tool STM32L1xx_Clock_Configuration_V1.1.0.xls
+ *
+ * 1. This file provides two functions and one global variable to be called from
+ * user application:
+ * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier
+ * and Divider factors, AHB/APBx prescalers and Flash settings),
+ * depending on the configuration made in the clock xls tool.
+ * This function is called at startup just after reset and
+ * before branch to main program. This call is made inside
+ * the "startup_stm32l1xx_xx.s" file.
+ *
+ * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
+ * by the user application to setup the SysTick
+ * timer or configure other parameters.
+ *
+ * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
+ * be called whenever the core clock is changed
+ * during program execution.
+ *
+ * 2. After each device reset the MSI (2.1 MHz Range) is used as system clock source.
+ * Then SystemInit() function is called, in "startup_stm32l1xx_xx.s" file, to
+ * configure the system clock before to branch to main program.
+ *
+ * 3. If the system clock source selected by user fails to startup, the SystemInit()
+ * function will do nothing and MSI still used as system clock source. User can
+ * add some code to deal with this issue inside the SetSysClock() function.
+ *
+ * 4. The default value of HSE crystal is set to 8MHz, refer to "HSE_VALUE" define
+ * in "stm32l1xx.h" file. When HSE is used as system clock source, directly or
+ * through PLL, and you are using different crystal you have to adapt the HSE
+ * value to your own configuration.
+ *
+ * 5. This file configures the system clock as follows:
+ *=============================================================================
+ * System Clock Configuration
+ *=============================================================================
+ * System Clock source | PLL(HSI)
+ *-----------------------------------------------------------------------------
+ * SYSCLK | 32000000 Hz
+ *-----------------------------------------------------------------------------
+ * HCLK | 32000000 Hz
+ *-----------------------------------------------------------------------------
+ * AHB Prescaler | 1
+ *-----------------------------------------------------------------------------
+ * APB1 Prescaler | 1
+ *-----------------------------------------------------------------------------
+ * APB2 Prescaler | 1
+ *-----------------------------------------------------------------------------
+ * HSE Frequency | 8000000 Hz
+ *-----------------------------------------------------------------------------
+ * PLL DIV | 2
+ *-----------------------------------------------------------------------------
+ * PLL MUL | 4
+ *-----------------------------------------------------------------------------
+ * VDD | 3.3 V
+ *-----------------------------------------------------------------------------
+ * Vcore | 1.8 V (Range 1)
+ *-----------------------------------------------------------------------------
+ * Flash Latency | 1 WS
+ *-----------------------------------------------------------------------------
+ * Require 48MHz for USB clock | Disabled
+ *-----------------------------------------------------------------------------
+ *=============================================================================
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT 2013 STMicroelectronics
+ *
+ * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.st.com/software_license_agreement_liberty_v2
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************
+ */
+
+/** @addtogroup CMSIS
+ * @{
+ */
+
+/** @addtogroup stm32l1xx_system
+ * @{
+ */
+
+/** @addtogroup STM32L1xx_System_Private_Includes
+ * @{
+ */
+
+#include "stm32l1xx.h"
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_TypesDefinitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_Defines
+ * @{
+ */
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+ Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
+ This value must be a multiple of 0x200. */
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_Variables
+ * @{
+ */
+uint32_t SystemCoreClock = 32000000;
+__I uint8_t PLLMulTable[9] = {3, 4, 6, 8, 12, 16, 24, 32, 48};
+__I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_FunctionPrototypes
+ * @{
+ */
+
+static void SetSysClock(void);
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32L1xx_System_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Setup the microcontroller system.
+ * Initialize the Embedded Flash Interface, the PLL and update the
+ * SystemCoreClock variable.
+ * @param None
+ * @retval None
+ */
+void SystemInit (void)
+{
+ /*!< Set MSION bit */
+ RCC->CR |= (uint32_t)0x00000100;
+
+ /*!< Reset SW[1:0], HPRE[3:0], PPRE1[2:0], PPRE2[2:0], MCOSEL[2:0] and MCOPRE[2:0] bits */
+ RCC->CFGR &= (uint32_t)0x88FFC00C;
+
+ /*!< Reset HSION, HSEON, CSSON and PLLON bits */
+ RCC->CR &= (uint32_t)0xEEFEFFFE;
+
+ /*!< Reset HSEBYP bit */
+ RCC->CR &= (uint32_t)0xFFFBFFFF;
+
+ /*!< Reset PLLSRC, PLLMUL[3:0] and PLLDIV[1:0] bits */
+ RCC->CFGR &= (uint32_t)0xFF02FFFF;
+
+ /*!< Disable all interrupts */
+ RCC->CIR = 0x00000000;
+
+ /* Configure the System clock frequency, AHB/APBx prescalers and Flash settings */
+ SetSysClock();
+
+#ifdef VECT_TAB_SRAM
+ SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */
+#else
+ SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */
+#endif
+}
+
+/**
+ * @brief Update SystemCoreClock according to Clock Register Values
+ * The SystemCoreClock variable contains the core clock (HCLK), it can
+ * be used by the user application to setup the SysTick timer or configure
+ * other parameters.
+ *
+ * @note Each time the core clock (HCLK) changes, this function must be called
+ * to update SystemCoreClock variable value. Otherwise, any configuration
+ * based on this variable will be incorrect.
+ *
+ * @note - The system frequency computed by this function is not the real
+ * frequency in the chip. It is calculated based on the predefined
+ * constant and the selected clock source:
+ *
+ * - If SYSCLK source is MSI, SystemCoreClock will contain the MSI
+ * value as defined by the MSI range.
+ *
+ * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
+ *
+ * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
+ *
+ * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
+ * or HSI_VALUE(*) multiplied/divided by the PLL factors.
+ *
+ * (*) HSI_VALUE is a constant defined in stm32l1xx.h file (default value
+ * 16 MHz) but the real value may vary depending on the variations
+ * in voltage and temperature.
+ *
+ * (**) HSE_VALUE is a constant defined in stm32l1xx.h file (default value
+ * 8 MHz), user has to ensure that HSE_VALUE is same as the real
+ * frequency of the crystal used. Otherwise, this function may
+ * have wrong result.
+ *
+ * - The result of this function could be not correct when using fractional
+ * value for HSE crystal.
+ * @param None
+ * @retval None
+ */
+void SystemCoreClockUpdate (void)
+{
+ uint32_t tmp = 0, pllmul = 0, plldiv = 0, pllsource = 0, msirange = 0;
+
+ /* Get SYSCLK source -------------------------------------------------------*/
+ tmp = RCC->CFGR & RCC_CFGR_SWS;
+
+ switch (tmp)
+ {
+ case 0x00: /* MSI used as system clock */
+ msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13;
+ SystemCoreClock = (32768 * (1 << (msirange + 1)));
+ break;
+ case 0x04: /* HSI used as system clock */
+ SystemCoreClock = HSI_VALUE;
+ break;
+ case 0x08: /* HSE used as system clock */
+ SystemCoreClock = HSE_VALUE;
+ break;
+ case 0x0C: /* PLL used as system clock */
+ /* Get PLL clock source and multiplication factor ----------------------*/
+ pllmul = RCC->CFGR & RCC_CFGR_PLLMUL;
+ plldiv = RCC->CFGR & RCC_CFGR_PLLDIV;
+ pllmul = PLLMulTable[(pllmul >> 18)];
+ plldiv = (plldiv >> 22) + 1;
+
+ pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
+
+ if (pllsource == 0x00)
+ {
+ /* HSI oscillator clock selected as PLL clock entry */
+ SystemCoreClock = (((HSI_VALUE) * pllmul) / plldiv);
+ }
+ else
+ {
+ /* HSE selected as PLL clock entry */
+ SystemCoreClock = (((HSE_VALUE) * pllmul) / plldiv);
+ }
+ break;
+ default: /* MSI used as system clock */
+ msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13;
+ SystemCoreClock = (32768 * (1 << (msirange + 1)));
+ break;
+ }
+ /* Compute HCLK clock frequency --------------------------------------------*/
+ /* Get HCLK prescaler */
+ tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
+ /* HCLK clock frequency */
+ SystemCoreClock >>= tmp;
+}
+
+/**
+ * @brief Configures the System clock frequency, AHB/APBx prescalers and Flash
+ * settings.
+ * @note This function should be called only once the RCC clock configuration
+ * is reset to the default reset state (done in SystemInit() function).
+ * @param None
+ * @retval None
+ */
+static void SetSysClock(void)
+{
+ __IO uint32_t StartUpCounter = 0, HSIStatus = 0;
+
+ /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/
+ /* Enable HSI */
+ RCC->CR |= ((uint32_t)RCC_CR_HSION);
+
+ /* Wait till HSI is ready and if Time out is reached exit */
+ do
+ {
+ HSIStatus = RCC->CR & RCC_CR_HSIRDY;
+ } while((HSIStatus == 0) && (StartUpCounter != HSI_STARTUP_TIMEOUT));
+
+ if ((RCC->CR & RCC_CR_HSIRDY) != RESET)
+ {
+ HSIStatus = (uint32_t)0x01;
+ }
+ else
+ {
+ HSIStatus = (uint32_t)0x00;
+ }
+
+ if (HSIStatus == (uint32_t)0x01)
+ {
+ /* Enable 64-bit access */
+ FLASH->ACR |= FLASH_ACR_ACC64;
+
+ /* Enable Prefetch Buffer */
+ FLASH->ACR |= FLASH_ACR_PRFTEN;
+
+ /* Flash 1 wait state */
+ FLASH->ACR |= FLASH_ACR_LATENCY;
+
+
+ /* Power enable */
+ RCC->APB1ENR |= RCC_APB1ENR_PWREN;
+
+ /* Select the Voltage Range 1 (1.8 V) */
+ PWR->CR = PWR_CR_VOS_0;
+
+
+ /* Wait Until the Voltage Regulator is ready */
+ while((PWR->CSR & PWR_CSR_VOSF) != RESET)
+ {
+ }
+
+ /* HCLK = SYSCLK /1*/
+ RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
+
+ /* PCLK2 = HCLK /1*/
+ RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
+
+ /* PCLK1 = HCLK /1*/
+ RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1;
+
+ /* PLL configuration */
+ RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLMUL |
+ RCC_CFGR_PLLDIV));
+ RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSI | RCC_CFGR_PLLMUL4 | RCC_CFGR_PLLDIV2);
+
+ /* Enable PLL */
+ RCC->CR |= RCC_CR_PLLON;
+
+ /* Wait till PLL is ready */
+ while((RCC->CR & RCC_CR_PLLRDY) == 0)
+ {
+ }
+
+ /* Select PLL as system clock source */
+ RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
+ RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL;
+
+ /* Wait till PLL is used as system clock source */
+ while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_PLL)
+ {
+ }
+ }
+ else
+ {
+ /* If HSI fails to start-up, the application will have wrong clock
+ configuration. User can add here some code to deal with this error */
+ }
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2013 STMicroelectronics *****END OF FILE****/