AWLU111001D1F7_SBSFU/Projects/STM32F407-Discovery/Applications/2_Images/AWLU111001D1F7/Src/i2c.c

/**
  ******************************************************************************
  * File Name          : I2C.c
  * Description        : This file provides code for the configuration
  *                      of the I2C instances.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "i2c.h"

/* USER CODE BEGIN 0 */
uint8_t I2C_METER_rx_buffer[I2C_BUFFER_SIZE];
uint8_t I2C_METER_recv_end_flag;
uint16_t I2C_METER_rx_len;
/* USER CODE END 0 */

I2C_HandleTypeDef hi2c2;

#ifndef METER_IC_I2C_DISABLE_DMA
DMA_HandleTypeDef hdma_i2c2_rx;
#endif

/* I2C2 init function */
void MX_I2C2_Init(void)
{

  hi2c2.Instance = I2C2;
  hi2c2.Init.ClockSpeed = 100000;
  hi2c2.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c2.Init.OwnAddress1 = 0;
  hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c2.Init.OwnAddress2 = 0;
  hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c2) != HAL_OK)
  {
    Error_Handler();
  }

}

void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspInit 0 */

  /* USER CODE END I2C2_MspInit 0 */

    __HAL_RCC_GPIOF_CLK_ENABLE();
    /**I2C2 GPIO Configuration
    PF0     ------> I2C2_SDA
    PF1     ------> I2C2_SCL
    */
    GPIO_InitStruct.Pin = I2C2_SDA_MeterIc_Pin|I2C2_SCL_MeterIc_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
    HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

    /* I2C2 clock enable */
    __HAL_RCC_I2C2_CLK_ENABLE();

#ifndef METER_IC_I2C_DISABLE_DMA
    /* I2C2 DMA Init */
    /* I2C2_RX Init */
    hdma_i2c2_rx.Instance = DMA1_Stream3;
    hdma_i2c2_rx.Init.Channel = DMA_CHANNEL_7;
    hdma_i2c2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_i2c2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_i2c2_rx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_i2c2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_i2c2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_i2c2_rx.Init.Mode = DMA_CIRCULAR;
    hdma_i2c2_rx.Init.Priority = DMA_PRIORITY_LOW;
    hdma_i2c2_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_i2c2_rx) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(i2cHandle,hdmarx,hdma_i2c2_rx);
#endif //METER_IC_I2C_DISABLE_DMA
  /* USER CODE BEGIN I2C2_MspInit 1 */

  /* USER CODE END I2C2_MspInit 1 */
  }
}

void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{

  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspDeInit 0 */

  /* USER CODE END I2C2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_I2C2_CLK_DISABLE();

    /**I2C2 GPIO Configuration
    PF0     ------> I2C2_SDA
    PF1     ------> I2C2_SCL
    */
    HAL_GPIO_DeInit(I2C2_SDA_MeterIc_GPIO_Port, I2C2_SDA_MeterIc_Pin);

    HAL_GPIO_DeInit(I2C2_SCL_MeterIc_GPIO_Port, I2C2_SCL_MeterIc_Pin);

    /* I2C2 DMA DeInit */
    HAL_DMA_DeInit(i2cHandle->hdmarx);
  /* USER CODE BEGIN I2C2_MspDeInit 1 */

  /* USER CODE END I2C2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */
void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *I2cHandle)
{
    I2C_METER_recv_end_flag = ON;
}
/* USER CODE END 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/