i2c.c

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/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file    i2c.c
 * @brief   This file provides code for the configuration
 *          of the I2C instances.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2025 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "i2c.h"
 
/* USER CODE BEGIN 0 */
 
/* USER CODE END 0 */
 
I2C_HandleTypeDef hi2c2;
 
/* I2C2 init function */
void MX_I2C2_Init(void)
{
 
  /* USER CODE BEGIN I2C2_Init 0 */
 
  /* USER CODE END I2C2_Init 0 */
 
  /* USER CODE BEGIN I2C2_Init 1 */
 
  /* USER CODE END I2C2_Init 1 */
  hi2c2.Instance = I2C2;
  hi2c2.Init.Timing = 0x30108DFF;
  hi2c2.Init.OwnAddress1 = 0;
  hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c2.Init.OwnAddress2 = 0;
  hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
  hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c2) != HAL_OK)
  {
    Error_Handler();
  }
 
  /** Configure Analogue filter
  */
  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
  {
    Error_Handler();
  }
 
  /** Configure Digital filter
  */
  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2C2_Init 2 */
 
  /* USER CODE END I2C2_Init 2 */
 
}
 
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{
 
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspInit 0 */
 
  /* USER CODE END I2C2_MspInit 0 */
 
  /** Initializes the peripherals clocks
  */
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2C2;
    PeriphClkInitStruct.I2c2ClockSelection = RCC_I2C2CLKSOURCE_PCLK1;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }
 
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**I2C2 GPIO Configuration
    PA11     ------> I2C2_SDA
    PA12     ------> I2C2_SCL
    */
    GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
    /* I2C2 clock enable */
    __HAL_RCC_I2C2_CLK_ENABLE();
  /* 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
    PA11     ------> I2C2_SDA
    PA12     ------> I2C2_SCL
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11);
 
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12);
 
  /* USER CODE BEGIN I2C2_MspDeInit 1 */
 
    /*
    GPIO_InitTypeDef GPIO_InitStruct = { 0 };
    GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
*/
  /* USER CODE END I2C2_MspDeInit 1 */
  }
}
 
/* USER CODE BEGIN 1 */
 
/**
 * @brief Deinitialize I2C2 peripheral for low power mode
 */
void MX_I2C2_DeInit(void)
{
    HAL_I2C_DeInit(&hi2c2);
    // MT 10.1.2026 set to HI, becuase of resistor to VCC
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET);
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_12, GPIO_PIN_SET);
}
 
HAL_StatusTypeDef I2C_IsDeviceReadyMT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Trials, uint32_t Timeout)
{
    HAL_StatusTypeDef status = HAL_I2C_IsDeviceReady(hi2c, DevAddress, Trials, Timeout);
    if (status == HAL_BUSY)
    {
        HAL_I2C_DeInit(hi2c);
        HAL_Delay(100);
        HAL_I2C_Init(hi2c);
    }
    return status;
}
/* USER CODE END 1 */