STM32 中的 I2C 通信

Question

我的問題很簡單，我只想將 i2c 從屬模式下的 STM32F103C8 藍色 phill 卡的 20 字節數據發送到主模式下的樹莓派 3，我使用 STM32Cube IDE 可以為我使用任何其他 Z581D6381F3F35E4F9D77201ACF87B34。 在瀏覽了 web 之后，我並不完全了解這一切所需的一切。 謝謝，

我添加了我正在測試的源代碼，目前它對我不起作用，我想知道可能出了什么問題，

#include "main.h"

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

//#define MASTER_BOARD
#define I2C_ADDRESS        0x30F

#define RXBUFFERSIZE    20

/* USER CODE END PD */

//#define I2C_SPEEDCLOCK   100000
#define I2C_DUTYCYCLE    I2C_DUTYCYCLE_2

/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;

/* USER CODE BEGIN PV */

uint8_t aTxBuffer[] = " ****I2C_TwoBoards communication based on IT****  ****I2C_TwoBoards communication based on IT**** ";

uint8_t aRxBuffer[RXBUFFERSIZE];

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
/* USER CODE BEGIN PFP */

int main(void) {
    /* USER CODE BEGIN 1 */

    HAL_Init();

    /* USER CODE BEGIN Init */

    /* USER CODE END Init */

    /* Configure the system clock */
    SystemClock_Config();

    /* USER CODE BEGIN SysInit */

    /* USER CODE END SysInit */

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_I2C1_Init();
    /* USER CODE BEGIN 2 */

    if (HAL_I2C_Init(&I2cHandle) != HAL_OK) {
        /* Initialization Error */
        Error_Handler();
    }

    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1) {
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */

    if(HAL_I2C_Slave_Receive_IT(&I2cHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
      {
        /* Transfer error in reception process */
        Error_Handler();
      }
//**************************************************************************************************
    while (HAL_I2C_GetState(&I2cHandle) != HAL_I2C_STATE_READY)
      {
      }
//**************************************************************************************************
    if(HAL_I2C_Slave_Transmit_IT(&I2cHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
      {
        /* Transfer error in transmission process */
        Error_Handler();
      }
//**************************************************************************************************
    while (HAL_I2C_GetState(&I2cHandle) != HAL_I2C_STATE_READY)
      {
      }
//**************************************************************************************************

    if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,RXBUFFERSIZE))
      {
        /* Processing Error */
        Error_Handler();
      }

}

/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void) {
    RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
    RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };

    /** Initializes the CPU, AHB and APB busses clocks
     */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
        Error_Handler();
    }
    /** Initializes the CPU, AHB and APB busses clocks
     */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
            | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
        Error_Handler();
    }
}

/**
 * @brief I2C1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_I2C1_Init(void) {

    /* USER CODE BEGIN I2C1_Init 0 */

    /* USER CODE END I2C1_Init 0 */

    /* USER CODE BEGIN I2C1_Init 1 */

    /* USER CODE END I2C1_Init 1 */
    hi2c1.Instance = I2C1;
    hi2c1.Init.ClockSpeed = 100000;
    hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    if (HAL_I2C_Init(&hi2c1) != HAL_OK) {
        Error_Handler();
    }
    /* USER CODE BEGIN I2C1_Init 2 */

    /* USER CODE END I2C1_Init 2 */

}

/**
 * @brief GPIO Initialization Function
 * @param None
 * @retval None
 */
static void MX_GPIO_Init(void) {

    /* GPIO Ports Clock Enable */
    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
 * @brief  This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void) {
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */

    /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{ 
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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

Answer 1

這個問題很廣泛，所以我將回答解決這類問題的方法。

嘗試將其縮小為更小的步驟，每個步驟都可以分解為更小的步驟，甚至在這里產生新的問題。

1. 找到一個 STM32 I2C 從機示例，構建和 flash 它。

   1. 如何在 STM32 上運行一個閃爍的示例
   2. 如何打開i2c端口
   3. 連接示波器並觀察 output

2. 從 RPi 讀取任何數據

   1. 你能從已知良好的從站讀取數據嗎？
3. 連接設備
4. 修改從代碼以發送自定義數據。
5. 在您的樹莓派上編寫應用程序