text: /**
    ******************************************************************************
    * @file    I2C/I2C_TwoBoards_RestartAdvComIT/Src/stm32f4xx_hal_msp.c
    * @author  MCD Application Team
    * @version V1.2.6
    * @date    06-May-2016
    * @brief   HAL MSP module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
    *
    * Redistribution and use in source and binary forms, with or without modification,
    * are permitted provided that the following conditions are met:
    *   1. Redistributions of source code must retain the above copyright notice,
    *      this list of conditions and the following disclaimer.
    *   2. 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.
    *   3. Neither the name of STMicroelectronics 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 HOLDER 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.
    *
    ******************************************************************************  
    */ 
  
  /* Includes ------------------------------------------------------------------*/
  #include "main.h"
  
  /** @addtogroup STM32F4xx_HAL_Examples
    * @{
    */
  
  /** @defgroup HAL_MSP
    * @brief HAL MSP module.
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  
  /** @defgroup HAL_MSP_Private_Functions
    * @{
    */
  
  /**
    * @brief I2C MSP Initialization 
    *        This function configures the hardware resources used in this example: 
    *           - Peripheral's clock enable
    *           - Peripheral's GPIO Configuration  
    *           - DMA configuration for transmission request by peripheral 
    *           - NVIC configuration for DMA interrupt request enable
    * @param hi2c: I2C handle pointer
    * @retval None
    */
  void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
  {
    GPIO_InitTypeDef  GPIO_InitStruct;
    
    /*##-1- Enable peripherals and GPIO Clocks #################################*/
    /* Enable GPIO TX/RX clock */
    I2Cx_SCL_GPIO_CLK_ENABLE();
    I2Cx_SDA_GPIO_CLK_ENABLE();
    /* Enable I2Cx clock */
    I2Cx_CLK_ENABLE(); 
  
    /*##-2- Configure peripheral GPIO ##########################################*/  
    /* I2C TX GPIO pin configuration  */
    GPIO_InitStruct.Pin       = I2Cx_SCL_PIN;
    GPIO_InitStruct.Mode      = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull      = GPIO_PULLUP;
    GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = I2Cx_SCL_SDA_AF;
    HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
      
    /* I2C RX GPIO pin configuration  */
    GPIO_InitStruct.Pin       = I2Cx_SDA_PIN;
    GPIO_InitStruct.Alternate = I2Cx_SCL_SDA_AF;
    HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
      
    /*##-3- Configure the NVIC for I2C ########################################*/   
    /* NVIC for I2Cx */
    HAL_NVIC_SetPriority(I2Cx_ER_IRQn, 0, 1);
    HAL_NVIC_EnableIRQ(I2Cx_ER_IRQn);
    HAL_NVIC_SetPriority(I2Cx_EV_IRQn, 0, 2);
    HAL_NVIC_EnableIRQ(I2Cx_EV_IRQn);
  }
  
  /**
    * @brief I2C MSP De-Initialization 
    *        This function frees the hardware resources used in this example:
    *          - Disable the Peripheral's clock
    *          - Revert GPIO, DMA and NVIC configuration to their default state
    * @param hi2c: I2C handle pointer
    * @retval None
    */
  void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
  {
    
    /*##-1- Reset peripherals ##################################################*/
    I2Cx_FORCE_RESET();
    I2Cx_RELEASE_RESET();
  
    /*##-2- Disable peripherals and GPIO Clocks #################################*/
    /* Configure I2C Tx as alternate function  */
    HAL_GPIO_DeInit(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN);
    /* Configure I2C Rx as alternate function  */
    HAL_GPIO_DeInit(I2Cx_SDA_GPIO_PORT, I2Cx_SDA_PIN);
    
    /*##-3- Disable the NVIC for I2C ##########################################*/
    HAL_NVIC_DisableIRQ(I2Cx_ER_IRQn);
    HAL_NVIC_DisableIRQ(I2Cx_EV_IRQn);
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  