stm32f4xx_hal_msp.c

#include "defines.h"

/**
  * @brief CAN MSP Initialization 
  *        This function configures the hardware resources used in this example: 
  *           - Peripheral's clock enable
  *           - Peripheral's GPIO Configuration  
  *           - NVIC configuration for DMA interrupt request enable
  * @param hcan: CAN handle pointer
  * @retval None
  */
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
  GPIO_InitTypeDef   GPIO_InitStruct;
  
  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* CAN1 Periph clock enable */
  CANx_CLK_ENABLE();
  /* Enable GPIO clock ****************************************/
  CANx_GPIO_CLK_ENABLE();
  
  /*##-2- Configure peripheral GPIO ##########################################*/ 
  /* CAN1 TX GPIO pin configuration */
  GPIO_InitStruct.Pin = CANx_TX_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Alternate =  CANx_TX_AF;
  
  HAL_GPIO_Init(CANx_TX_GPIO_PORT, &GPIO_InitStruct);
  
  /* CAN1 RX GPIO pin configuration */
  GPIO_InitStruct.Pin = CANx_RX_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Alternate =  CANx_RX_AF;
  
  HAL_GPIO_Init(CANx_TX_GPIO_PORT, &GPIO_InitStruct);
  
  /*##-3- Configure the NVIC #################################################*/
  /* NVIC configuration for CAN1 Reception complete interrupt */

    HAL_NVIC_SetPriority(CANx_RX_IRQn1, 1, 0);
  HAL_NVIC_EnableIRQ(CANx_RX_IRQn1);

}
/**
  * @brief CAN MSP De-Initialization 
  *        This function frees the hardware resources used in this example:
  *          - Disable the Peripheral's clock
  *          - Revert GPIO to their default state
  * @param hcan: CAN handle pointer
  * @retval None
  */
void HAL_CAN_MspDeInit(CAN_HandleTypeDef *hcan)
{
  /*##-1- Reset peripherals ##################################################*/
  CANx_FORCE_RESET();
  CANx_RELEASE_RESET();

  /*##-2- Disable peripherals and GPIO Clocks ################################*/
  /* De-initialize the CAN1 TX GPIO pin */
  HAL_GPIO_DeInit(CANx_TX_GPIO_PORT, CANx_TX_PIN);
  /* De-initialize the CAN1 RX GPIO pin */
  HAL_GPIO_DeInit(CANx_RX_GPIO_PORT, CANx_RX_PIN);
  
  /*##-4- Disable the NVIC for CAN reception #################################*/
  HAL_NVIC_DisableIRQ(CANx_RX_IRQn1);
}