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******************************************************************************
* @file stm32l1xx_syscfg.c
* @author MCD Application Team
* @version V1.2.0
* @date 22-February-2013
* @brief This file provides firmware functions to manage the following
* functionalities of the SYSCFG and RI peripherals:
* + SYSCFG Initialization and Configuration
* + RI Initialization and Configuration
*
@verbatim
===============================================================================
##### How to use this driver #####
===============================================================================
[..] This driver provides functions for:
(#) Remapping the memory accessible in the code area using
SYSCFG_MemoryRemapConfig().
(#) Manage the EXTI lines connection to the GPIOs using
SYSCFG_EXTILineConfig().
(#) Routing of I/Os toward the input captures of timers (TIM2, TIM3 and TIM4).
(#) Input routing of COMP1 and COMP2.
(#) Routing of internal reference voltage VREFINT to PB0 and PB1.
(#) The RI registers can be accessed only when the comparator
APB interface clock is enabled.
To enable comparator clock use:
RCC_APB1PeriphClockCmd(RCC_APB1Periph_COMP, ENABLE).
Following functions uses RI registers:
(++) SYSCFG_RIDeInit()
(++) SYSCFG_RITIMSelect()
(++) SYSCFG_RITIMInputCaptureConfig()
(++) SYSCFG_RIResistorConfig()
(++) SYSCFG_RIChannelSpeedConfig()
(++) SYSCFG_RIIOSwitchConfig()
(++) SYSCFG_RISwitchControlModeCmd()
(++) SYSCFG_RIHysteresisConfig()
(#) The SYSCFG registers can be accessed only when the SYSCFG
interface APB clock is enabled.
To enable SYSCFG APB clock use:
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
Following functions uses SYSCFG registers:
(++) SYSCFG_DeInit()
(++) SYSCFG_MemoryRemapConfig()
(++) SYSCFG_GetBootMode()
(++) SYSCFG_USBPuCmd()
(++) SYSCFG_EXTILineConfig()
@endverbatim
*
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
*
* 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_syscfg.h"
#include "stm32l1xx_rcc.h"
/** @addtogroup STM32L1xx_StdPeriph_Driver
* @{
*/
/** @defgroup SYSCFG
* @brief SYSCFG driver modules
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TIM_SELECT_MASK ((uint32_t)0xFFFCFFFF) /*!< TIM select mask */
#define IC_ROUTING_MASK ((uint32_t)0x0000000F) /*!< Input Capture routing mask */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup SYSCFG_Private_Functions
* @{
*/
/** @defgroup SYSCFG_Group1 SYSCFG Initialization and Configuration functions
* @brief SYSCFG Initialization and Configuration functions
*
@verbatim
===============================================================================
##### SYSCFG Initialization and Configuration functions #####
===============================================================================
@endverbatim
* @{
*/
/**
* @brief Deinitializes the SYSCFG registers to their default reset values.
* @param None.
* @retval None.
* @Note: MEMRMP bits are not reset by APB2 reset.
*/
void SYSCFG_DeInit(void)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SYSCFG, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SYSCFG, DISABLE);
}
/**
* @brief Deinitializes the RI registers to their default reset values.
* @param None.
* @retval None.
*/
void SYSCFG_RIDeInit(void)
{
RI->ICR = ((uint32_t)0x00000000); /*!< Set RI->ICR to reset value */
RI->ASCR1 = ((uint32_t)0x00000000); /*!< Set RI->ASCR1 to reset value */
RI->ASCR2 = ((uint32_t)0x00000000); /*!< Set RI->ASCR2 to reset value */
RI->HYSCR1 = ((uint32_t)0x00000000); /*!< Set RI->HYSCR1 to reset value */
RI->HYSCR2 = ((uint32_t)0x00000000); /*!< Set RI->HYSCR2 to reset value */
RI->HYSCR3 = ((uint32_t)0x00000000); /*!< Set RI->HYSCR3 to reset value */
RI->HYSCR4 = ((uint32_t)0x00000000); /*!< Set RI->HYSCR4 to reset value */
}
/**
* @brief Changes the mapping of the specified memory.
* @param SYSCFG_Memory: selects the memory remapping.
* This parameter can be one of the following values:
* @arg SYSCFG_MemoryRemap_Flash: Main Flash memory mapped at 0x00000000
* @arg SYSCFG_MemoryRemap_SystemFlash: System Flash memory mapped at 0x00000000
* @arg SYSCFG_MemoryRemap_FSMC: FSMC memory mapped at 0x00000000
* @arg SYSCFG_MemoryRemap_SRAM: Embedded SRAM mapped at 0x00000000
* @retval None
*/
void SYSCFG_MemoryRemapConfig(uint8_t SYSCFG_MemoryRemap)
{
/* Check the parameters */
assert_param(IS_SYSCFG_MEMORY_REMAP_CONFING(SYSCFG_MemoryRemap));
SYSCFG->MEMRMP = SYSCFG_MemoryRemap;
}
/**
* @brief Returns the boot mode as configured by user.
* @param None.
* @retval The boot mode as configured by user. The returned value can be one
* of the following values:
* - 0x00000000: Boot is configured in Main Flash memory
* - 0x00000100: Boot is configured in System Flash memory
* - 0x00000200: Boot is configured in FSMC memory
* - 0x00000300: Boot is configured in Embedded SRAM memory
*/
uint32_t SYSCFG_GetBootMode(void)
{
return (SYSCFG->MEMRMP & SYSCFG_MEMRMP_BOOT_MODE);
}
/**
* @brief Control the internal pull-up on USB DP line.
* @param NewState: New state of the internal pull-up on USB DP line.
* This parameter can be ENABLE: Connect internal pull-up on USB DP line.
* or DISABLE: Disconnect internal pull-up on USB DP line.
* @retval None
*/
void SYSCFG_USBPuCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Connect internal pull-up on USB DP line */
SYSCFG->PMC |= (uint32_t) SYSCFG_PMC_USB_PU;
}
else
{
/* Disconnect internal pull-up on USB DP line */
SYSCFG->PMC &= (uint32_t)(~SYSCFG_PMC_USB_PU);
}
}
/**
* @brief Selects the GPIO pin used as EXTI Line.
* @param EXTI_PortSourceGPIOx : selects the GPIO port to be used as source
* for EXTI lines where x can be (A, B, C, D, E, F, G or H).
* @param EXTI_PinSourcex: specifies the EXTI line to be configured.
* This parameter can be EXTI_PinSourcex where x can be (0..15).
* @retval None
*/
void SYSCFG_EXTILineConfig(uint8_t EXTI_PortSourceGPIOx, uint8_t EXTI_PinSourcex)
{
uint32_t tmp = 0x00;
/* Check the parameters */
assert_param(IS_EXTI_PORT_SOURCE(EXTI_PortSourceGPIOx));
assert_param(IS_EXTI_PIN_SOURCE(EXTI_PinSourcex));
tmp = ((uint32_t)0x0F) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03));
SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] &= ~tmp;
SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] |= (((uint32_t)EXTI_PortSourceGPIOx) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03)));
}
/**
* @}
*/
/** @defgroup SYSCFG_Group2 RI Initialization and Configuration functions
* @brief RI Initialization and Configuration functions
*
@verbatim
===============================================================================
##### RI Initialization and Configuration functions #####
===============================================================================
@endverbatim
* @{
*/
/**
* @brief Configures the routing interface to select which Timer to be routed.
* @note Routing capability can be applied only on one of the three timers
* (TIM2, TIM3 or TIM4) at a time.
* @param TIM_Select: Timer select.
* This parameter can be one of the following values:
* @arg TIM_Select_None: No timer selected and default Timer mapping is enabled.
* @arg TIM_Select_TIM2: Timer 2 Input Captures to be routed.
* @arg TIM_Select_TIM3: Timer 3 Input Captures to be routed.
* @arg TIM_Select_TIM4: Timer 4 Input Captures to be routed.
* @retval None.
*/
void SYSCFG_RITIMSelect(uint32_t TIM_Select)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_RI_TIM(TIM_Select));
/* Get the old register value */
tmpreg = RI->ICR;
/* Clear the TIMx select bits */
tmpreg &= TIM_SELECT_MASK;
/* Select the Timer */
tmpreg |= (TIM_Select);
/* Write to RI->ICR register */
RI->ICR = tmpreg;
}
/**
* @brief Configures the routing interface to map Input Capture 1, 2, 3 or 4
* to a selected I/O pin.
* @param RI_InputCapture selects which input capture to be routed.
* This parameter can be one (or combination) of the following parameters:
* @arg RI_InputCapture_IC1: Input capture 1 is selected.
* @arg RI_InputCapture_IC2: Input capture 2 is selected.
* @arg RI_InputCapture_IC3: Input capture 3 is selected.
* @arg RI_InputCapture_IC4: Input capture 4 is selected.
* @param RI_InputCaptureRouting: selects which pin to be routed to Input Capture.
* This parameter can be one of the following values:
* @param RI_InputCaptureRouting_0 to RI_InputCaptureRouting_15
* e.g.
* SYSCFG_RITIMSelect(TIM_Select_TIM2)
* SYSCFG_RITIMInputCaptureConfig(RI_InputCapture_IC1, RI_InputCaptureRouting_1)
* allows routing of Input capture IC1 of TIM2 to PA4.
* For details about correspondence between RI_InputCaptureRouting_x
* and I/O pins refer to the parameters' description in the header file
* or refer to the product reference manual.
* @note Input capture selection bits are not reset by this function.
* To reset input capture selection bits, use SYSCFG_RIDeInit() function.
* @note The I/O should be configured in alternate function mode (AF14) using
* GPIO_PinAFConfig() function.
* @retval None.
*/
void SYSCFG_RITIMInputCaptureConfig(uint32_t RI_InputCapture, uint32_t RI_InputCaptureRouting)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_RI_INPUTCAPTURE(RI_InputCapture));
assert_param(IS_RI_INPUTCAPTURE_ROUTING(RI_InputCaptureRouting));
/* Get the old register value */
tmpreg = RI->ICR;
/* Select input captures to be routed */
tmpreg |= (RI_InputCapture);
if((RI_InputCapture & RI_InputCapture_IC1) == RI_InputCapture_IC1)
{
/* Clear the input capture select bits */
tmpreg &= (uint32_t)(~IC_ROUTING_MASK);
/* Set RI_InputCaptureRouting bits */
tmpreg |= (uint32_t)( RI_InputCaptureRouting);
}
if((RI_InputCapture & RI_InputCapture_IC2) == RI_InputCapture_IC2)
{
/* Clear the input capture select bits */
tmpreg &= (uint32_t)(~(IC_ROUTING_MASK << 4));
/* Set RI_InputCaptureRouting bits */
tmpreg |= (uint32_t)( (RI_InputCaptureRouting << 4));
}
if((RI_InputCapture & RI_InputCapture_IC3) == RI_InputCapture_IC3)
{
/* Clear the input capture select bits */
tmpreg &= (uint32_t)(~(IC_ROUTING_MASK << 8));
/* Set RI_InputCaptureRouting bits */
tmpreg |= (uint32_t)( (RI_InputCaptureRouting << 8));
}
if((RI_InputCapture & RI_InputCapture_IC4) == RI_InputCapture_IC4)
{
/* Clear the input capture select bits */
tmpreg &= (uint32_t)(~(IC_ROUTING_MASK << 12));
/* Set RI_InputCaptureRouting bits */
tmpreg |= (uint32_t)( (RI_InputCaptureRouting << 12));
}
/* Write to RI->ICR register */
RI->ICR = tmpreg;
}
/**
* @brief Configures the Pull-up and Pull-down Resistors
* @param RI_Resistor selects the resistor to connect.
* This parameter can be one of the following values:
* @arg RI_Resistor_10KPU: 10K pull-up resistor.
* @arg RI_Resistor_400KPU: 400K pull-up resistor.
* @arg RI_Resistor_10KPD: 10K pull-down resistor.
* @arg RI_Resistor_400KPD: 400K pull-down resistor.
* @param NewState: New state of the analog switch associated to the selected
* resistor.
* This parameter can be:
* ENABLE so the selected resistor is connected
* or DISABLE so the selected resistor is disconnected.
* @note To avoid extra power consumption, only one resistor should be enabled
* at a time.
* @retval None
*/
void SYSCFG_RIResistorConfig(uint32_t RI_Resistor, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_RI_RESISTOR(RI_Resistor));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the resistor */
COMP->CSR |= (uint32_t) RI_Resistor;
}
else
{
/* Disable the Resistor */
COMP->CSR &= (uint32_t) (~RI_Resistor);
}
}
/**
* @brief Configures the ADC channels speed.
* @param RI_Channel selects the channel.
* This parameter can be one of the following values:
* @arg RI_Channel_3: Channel 3 is selected.
* @arg RI_Channel_8: Channel 8 is selected.
* @arg RI_Channel_13: Channel 13 is selected.
* @param RI_ChannelSpeed: The speed of the selected ADC channel
* This parameter can be:
* RI_ChannelSpeed_Fast: The selected channel is a fast ADC channel
* or RI_ChannelSpeed_Slow: The selected channel is a slow ADC channel.
* @retval None
*/
void SYSCFG_RIChannelSpeedConfig(uint32_t RI_Channel, uint32_t RI_ChannelSpeed)
{
/* Check the parameters */
assert_param(IS_RI_CHANNEL(RI_Channel));
assert_param(IS_RI_CHANNELSPEED(RI_ChannelSpeed));
if(RI_ChannelSpeed != RI_ChannelSpeed_Fast)
{
/* Set the selected channel as a slow ADC channel */
COMP->CSR &= (uint32_t) (~RI_Channel);
}
else
{
/* Set the selected channel as a fast ADC channel */
COMP->CSR |= (uint32_t) (RI_Channel);
}
}
/**
* @brief Close or Open the routing interface Input Output switches.
* @param RI_IOSwitch: selects the I/O analog switch number.
* This parameter can be one of the following values:
* @param RI_IOSwitch_CH0 --> RI_IOSwitch_CH15.
* @param RI_IOSwitch_CH18 --> RI_IOSwitch_CH25.
* @param RI_IOSwitch_GR10_1 --> RI_IOSwitch_GR10_4.
* @param RI_IOSwitch_GR6_1 --> RI_IOSwitch_GR6_2.
* @param RI_IOSwitch_GR5_1 --> RI_IOSwitch_GR5_3.
* @param RI_IOSwitch_GR4_1 --> RI_IOSwitch_GR4_3.
* @param RI_IOSwitch_VCOMP
* RI_IOSwitch_CH27
* @param RI_IOSwitch_CH28 --> RI_IOSwitch_CH30
* @param RI_IOSwitch_GR10_1 --> RI_IOSwitch_GR10_4
* @param RI_IOSwitch_GR6_1
* @param RI_IOSwitch_GR6_2
* @param RI_IOSwitch_GR5_1 --> RI_IOSwitch_GR5_3
* @param RI_IOSwitch_GR4_1 --> RI_IOSwitch_GR4_4
* @param RI_IOSwitch_CH0b --> RI_IOSwitch_CH3b
* @param RI_IOSwitch_CH6b --> RI_IOSwitch_CH12b
* @param RI_IOSwitch_GR6_3
* @param RI_IOSwitch_GR6_4
* @param RI_IOSwitch_GR5_4
* @param NewState: New state of the analog switch.
* This parameter can be
* ENABLE so the Input Output switch is closed
* or DISABLE so the Input Output switch is open.
* @retval None
*/
void SYSCFG_RIIOSwitchConfig(uint32_t RI_IOSwitch, FunctionalState NewState)
{
uint32_t ioswitchmask = 0;
/* Check the parameters */
assert_param(IS_RI_IOSWITCH(RI_IOSwitch));
/* Read Analog switch register index */
ioswitchmask = RI_IOSwitch >> 31;
/* Get Bits[30:0] of the IO switch */
RI_IOSwitch &= 0x7FFFFFFF;
if (NewState != DISABLE)
{
if (ioswitchmask != 0)
{
/* Close the analog switches */
RI->ASCR1 |= RI_IOSwitch;
}
else
{
/* Open the analog switches */
RI->ASCR2 |= RI_IOSwitch;
}
}
else
{
if (ioswitchmask != 0)
{
/* Close the analog switches */
RI->ASCR1 &= (~ (uint32_t)RI_IOSwitch);
}
else
{
/* Open the analog switches */
RI->ASCR2 &= (~ (uint32_t)RI_IOSwitch);
}
}
}
/**
* @brief Enable or disable the switch control mode.
* @param NewState: New state of the switch control mode. This parameter can
* be ENABLE: ADC analog switches closed if the corresponding
* I/O switch is also closed.
* When using COMP1, switch control mode must be enabled.
* or DISABLE: ADC analog switches open or controlled by the ADC interface.
* When using the ADC for acquisition, switch control mode
* must be disabled.
* @note COMP1 comparator and ADC cannot be used at the same time since
* they share the ADC switch matrix.
* @retval None
*/
void SYSCFG_RISwitchControlModeCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the Switch control mode */
RI->ASCR1 |= (uint32_t) RI_ASCR1_SCM;
}
else
{
/* Disable the Switch control mode */
RI->ASCR1 &= (uint32_t)(~RI_ASCR1_SCM);
}
}
/**
* @brief Enable or disable Hysteresis of the input schmitt triger of Ports A..E
* When the I/Os are programmed in input mode by standard I/O port
* registers, the Schmitt trigger and the hysteresis are enabled by default.
* When hysteresis is disabled, it is possible to read the
* corresponding port with a trigger level of VDDIO/2.
* @param RI_Port: selects the GPIO Port.
* This parameter can be one of the following values:
* @arg RI_PortA: Port A is selected
* @arg RI_PortB: Port B is selected
* @arg RI_PortC: Port C is selected
* @arg RI_PortD: Port D is selected
* @arg RI_PortE: Port E is selected
* @arg RI_PortF: Port F is selected
* @arg RI_PortG: Port G is selected
* @param RI_Pin : Selects the pin(s) on which to enable or disable hysteresis.
* This parameter can any value from RI_Pin_x where x can be (0..15) or RI_Pin_All.
* @param NewState new state of the Hysteresis.
* This parameter can be:
* ENABLE so the Hysteresis is on
* or DISABLE so the Hysteresis is off
* @retval None
*/
void SYSCFG_RIHysteresisConfig(uint8_t RI_Port, uint16_t RI_Pin,
FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_RI_PORT(RI_Port));
assert_param(IS_RI_PIN(RI_Pin));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(RI_Port == RI_PortA)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR1 &= (uint32_t)~((uint32_t)RI_Pin);
}
else
{
/* Hysteresis off */
RI->HYSCR1 |= (uint32_t) RI_Pin;
}
}
else if(RI_Port == RI_PortB)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR1 &= (uint32_t) (~((uint32_t)RI_Pin) << 16);
}
else
{
/* Hysteresis off */
RI->HYSCR1 |= (uint32_t) ((uint32_t)(RI_Pin) << 16);
}
}
else if(RI_Port == RI_PortC)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR2 &= (uint32_t) (~((uint32_t)RI_Pin));
}
else
{
/* Hysteresis off */
RI->HYSCR2 |= (uint32_t) (RI_Pin );
}
}
else if(RI_Port == RI_PortD)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR2 &= (uint32_t) (~((uint32_t)RI_Pin) << 16);
}
else
{
/* Hysteresis off */
RI->HYSCR2 |= (uint32_t) ((uint32_t)(RI_Pin) << 16);
}
}
else if(RI_Port == RI_PortE)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR3 &= (uint32_t) (~((uint32_t)RI_Pin));
}
else
{
/* Hysteresis off */
RI->HYSCR3 |= (uint32_t) (RI_Pin );
}
}
else if(RI_Port == RI_PortF)
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR3 &= (uint32_t) (~((uint32_t)RI_Pin) << 16);
}
else
{
/* Hysteresis off */
RI->HYSCR3 |= (uint32_t) ((uint32_t)(RI_Pin) << 16);
}
}
else /* RI_Port == RI_PortG */
{
if (NewState != DISABLE)
{
/* Hysteresis on */
RI->HYSCR4 &= (uint32_t) (~((uint32_t)RI_Pin));
}
else
{
/* Hysteresis off */
RI->HYSCR4 |= (uint32_t) (RI_Pin);
}
}
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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