200 lines
6.8 KiB
C
200 lines
6.8 KiB
C
/**
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******************************************************************************
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* @file HAL_syscfg.c
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* @author IC Applications Department
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* @version V0.8
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* @date 2019_08_02
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* @brief This file provides firmware functions to manage the following
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* functionalities of the SYSCFG peripheral:
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* + Remapping the memory mapped at 0x00000000
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* + Remapping the DMA channels
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* + Enabling I2C fast mode plus driving capability for I2C pins
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* + Configuring the EXTI lines connection to the GPIO port
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* + Configuring the CFGR2 features (Connecting some internal signal
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* to the break input of TIM1)
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*
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* @verbatim
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===============================================================================
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##### How to use this driver #####
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===============================================================================
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[..]
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The SYSCFG registers can be accessed only when the SYSCFG
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interface APB clock is enabled.
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To enable SYSCFG APB clock use:
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RCC_APBPeriphClockCmd(RCC_APBPeriph_SYSCFG, ENABLE).
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* @endverbatim
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2016 HOLOCENE</center></h2>
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "HAL_syscfg.h"
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/** @addtogroup StdPeriph_Driver
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* @{
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*/
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/** @defgroup SYSCFG
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* @brief SYSCFG driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup SYSCFG_Private_Functions
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* @{
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*/
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/** @defgroup SYSCFG_Group1 SYSCFG Initialization and Configuration functions
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* @brief SYSCFG Initialization and Configuration functions
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*
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@verbatim
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===============================================================================
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##### SYSCFG Initialization and Configuration functions #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Deinitializes the SYSCFG registers to their default reset values.
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* @param None
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* @retval None
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* @note MEM_MODE bits are not affected by APB reset.
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* @note MEM_MODE bits took the value from the user option bytes.
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* @note CFGR2 register is not affected by APB reset.
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* @note CLABBB configuration bits are locked when set.
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* @note To unlock the configuration, perform a system reset.
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*/
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void SYSCFG_DeInit(void)
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{
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/* Set SYSCFG_CFGR1 register to reset value without affecting MEM_MODE bits */
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SYSCFG->CFGR &= SYSCFG_CFGR_MEM_MODE;
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/* Set EXTICRx registers to reset value */
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SYSCFG->EXTICR[0] = 0;
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SYSCFG->EXTICR[1] = 0;
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SYSCFG->EXTICR[2] = 0;
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SYSCFG->EXTICR[3] = 0;
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}
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/**
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* @brief Configures the memory mapping at address 0x00000000.
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* @param SYSCFG_MemoryRemap: selects the memory remapping.
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* This parameter can be one of the following values:
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* @arg SYSCFG_MemoryRemap_Flash: Main Flash memory mapped at 0x00000000
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* @arg SYSCFG_MemoryRemap_SystemMemory: System Flash memory mapped at 0x00000000
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* @arg SYSCFG_MemoryRemap_SRAM: Embedded SRAM mapped at 0x00000000
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* @retval None
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*/
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void SYSCFG_MemoryRemapConfig(uint32_t SYSCFG_MemoryRemap)
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{
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uint32_t tmpctrl = 0;
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/* Check the parameter */
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assert_param(IS_SYSCFG_MEMORY_REMAP(SYSCFG_MemoryRemap));
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/* Get CFGR1 register value */
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tmpctrl = SYSCFG->CFGR;
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/* Clear MEM_MODE bits */
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tmpctrl &= (uint32_t) (~SYSCFG_CFGR_MEM_MODE);
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/* Set the new MEM_MODE bits value */
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tmpctrl |= (uint32_t) SYSCFG_MemoryRemap;
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/* Set CFGR1 register with the new memory remap configuration */
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SYSCFG->CFGR = tmpctrl;
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}
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/**
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* @brief Configure the DMA channels remapping.
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* @param SYSCFG_DMARemap: selects the DMA channels remap.
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* This parameter can be one of the following values:
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* @arg SYSCFG_DMARemap_TIM17: Remap TIM17 DMA requests from channel1 to channel2
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* @arg SYSCFG_DMARemap_TIM16: Remap TIM16 DMA requests from channel3 to channel4
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* @arg SYSCFG_DMARemap_UART1Rx: Remap UART1 Rx DMA requests from channel3 to channel5
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* @arg SYSCFG_DMARemap_UART1Tx: Remap UART1 Tx DMA requests from channel2 to channel4
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* @arg SYSCFG_DMARemap_ADC1: Remap ADC1 DMA requests from channel1 to channel2
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* @param NewState: new state of the DMA channel remapping.
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* This parameter can be: ENABLE or DISABLE.
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* @note When enabled, DMA channel of the selected peripheral is remapped
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* @note When disabled, Default DMA channel is mapped to the selected peripheral
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* @note By default TIM17 DMA requests is mapped to channel 1,
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* use SYSCFG_DMAChannelRemapConfig(SYSCFG_DMARemap_TIM17, Enable) to remap
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* TIM17 DMA requests to channel 2 and use
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* SYSCFG_DMAChannelRemapConfig(SYSCFG_DMARemap_TIM17, Disable) to map
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* TIM17 DMA requests to channel 1 (default mapping)
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* @retval None
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*/
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void SYSCFG_DMAChannelRemapConfig(uint32_t SYSCFG_DMARemap, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_SYSCFG_DMA_REMAP(SYSCFG_DMARemap));
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Remap the DMA channel */
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SYSCFG->CFGR |= (uint32_t)SYSCFG_DMARemap;
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}
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else
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{
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/* use the default DMA channel mapping */
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SYSCFG->CFGR &= (uint32_t)(~SYSCFG_DMARemap);
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}
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}
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/**
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* @brief Selects the GPIO pin used as EXTI Line.
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* @param EXTI_PortSourceGPIOx: selects the GPIO port to be used as source
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* for EXTI lines where x can be (A, B, C, D, E or F).
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* @param EXTI_PinSourcex: specifies the EXTI line to be configured.
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* @note This parameter can be EXTI_PinSourcex where x can be:
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* For MCU: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOD.
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* @retval None
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*/
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void SYSCFG_EXTILineConfig(uint8_t EXTI_PortSourceGPIOx, uint8_t EXTI_PinSourcex)
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{
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uint32_t tmp = 0x00;
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/* Check the parameters */
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assert_param(IS_EXTI_PORT_SOURCE(EXTI_PortSourceGPIOx));
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assert_param(IS_EXTI_PIN_SOURCE(EXTI_PinSourcex));
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tmp = ((uint32_t)0x0F) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03));
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SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] &= ~tmp;
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SYSCFG->EXTICR[EXTI_PinSourcex >> 0x02] |= (((uint32_t)EXTI_PortSourceGPIOx) << (0x04 * (EXTI_PinSourcex & (uint8_t)0x03)));
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/*-------------------------(C) COPYRIGHT 2016 HOLOCENE ----------------------*/
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