如何使用硬件I2C当作Slave来模拟EEPROM行为？

MCU:STM32F103
IDE:STM32CubeIDE
HAL库
硬件I2C当作Slave,模拟EEPROM行为
测试工具：树莓派为I2C主机，使用I2C-tools进行测试
配置I2C:从机地址可直接在代码中修改，记得开启中断










main.c代码：

/* USER CODE END Header */

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

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

#include "stdio.h"

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

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

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

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

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

PUTCHAR_PROTOTYPE
{
  HAL_UART_Transmit(&huart1,(uint8_t*)&ch, 1, 0xFFFF);
  return ch;
}

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

uint8_t r_flag = 0,t_flag = 0;
uint8_t flag_0 = 0,flag_1 = 0,flag_2 = 0,flag_3 = 0,flag_4 = 0,flag_5 = 0;
uint16_t rx_len = 0;
uint16_t tx_len = 0;
uint16_t rx_count = 0;
uint8_t RX_Buffer[256];
uint8_t rx_buff[256] = {0x00};
uint8_t tx_buff[260] =
{
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
  0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF,
};

void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ADDR);

        if(r_flag == 1)
        {
                rx_count = (255 - hi2c->XferCount);
                memcpy((RX_Buffer + rx_len),rx_buff,rx_count);
                rx_len = rx_count + rx_len;
        }
        if(t_flag == 1)
        {
                tx_len = (255 - hi2c->XferCount) + tx_len;
        }
    if(rx_count == 2)                     //模拟EEPROM写寄存器值功能
    {
            tx_buff[rx_buff[0]] = rx_buff[1] ;
    }

        if(TransferDirection == I2C_DIRECTION_RECEIVE)      //需要发送
        {
                flag_0++;

                t_flag = 1;   //置发送标志
                r_flag = 0;   //清楚读标志
//                HAL_I2C_Slave_Transmit_IT(&hi2c1, (tx_buff + rx_buff[0]), 1);   //该函数发送会使总线死掉
                HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, (tx_buff + rx_buff[0]), 255, I2C_FIRST_FRAME);  //模拟EEPROM获取寄存器值行为
        }
        else if(TransferDirection == I2C_DIRECTION_TRANSMIT)//需要接收
        {
                flag_1++;

                t_flag = 0;  //清除发送标志
                r_flag = 1;  //置读标志
//                HAL_I2C_Slave_Receive_IT(&hi2c1, rx_buff, 1);                   //该函数接受会使总线死掉
                HAL_I2C_Slave_Seq_Receive_IT(&hi2c1, rx_buff, 255, I2C_FIRST_FRAME);
        }
        else
        {}
}

void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)  //监听中断回调，说明传输结束
{
        flag_2++;

        if(r_flag == 1)
        {
                rx_count = (255 - hi2c->XferCount);
                memcpy((RX_Buffer + rx_len),rx_buff,rx_count);
                rx_len = rx_count + rx_len;
        }
        if(t_flag == 1)
        {
                tx_len = (255 - hi2c->XferCount) + tx_len;
        }
    t_flag = 0;  //清除发送标志
    r_flag = 0;  //清除读标志

        HAL_I2C_EnableListen_IT(hi2c); // Restart
}

void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c)  //全部发送完成回调，发送256字节回调
{
        flag_3++;
}
void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c)  //全部接收完成回调，收到256字节回调
{
        flag_4++;
}
void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c)
{
        flag_5++;
}


/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  uint16_t i;

  /* USER CODE END 1 */
  

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  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();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */

  HAL_I2C_EnableListen_IT(&hi2c1);
//  HAL_I2C_Slave_Seq_Receive_IT(&hi2c1, rx_buff, 255, I2C_LAST_FRAME);  //开启从机中断接收
  HAL_I2C_Slave_Receive_IT(&hi2c1, rx_buff, 1);
  printf("start test i2c!nr");

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
#if 1
          if (flag_0 > 0)
          {
                printf("T:%dnr",flag_0);
                flag_0 = 0;
          }
          if(flag_1 > 0)
          {
                printf("R:%dnr",flag_1);
                flag_1 = 0;
          }
          if(flag_2 > 0)
          {
                printf("lc:%dnr",flag_2);
                flag_2 = 0;
          }
          if(flag_3 > 0)
          {
                printf("tc:%dnr",flag_3);
                flag_3 = 0;
          }
          if(flag_4 > 0)
          {
                printf("rc:%dnr",flag_4);
                flag_4 = 0;
          }
          if(flag_5 > 0)
          {
                  printf("er:%dnr",flag_5);
                  flag_5 = 0;
          }
#endif
#if 1
          if((rx_len > 0) && (r_flag == 0) && (t_flag == 0))
          {
#if 0
                  HAL_Delay(2000);
                  for(i=0;i                   {
                          printf("%x ",RX_Buffer);
                  }
                  printf("nr");
#endif
                  memset(RX_Buffer,0,rx_len);
                  rx_len = 0;
                  tx_len = 0;
          }
#endif

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

/**
  * @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_MUL3;
  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_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != 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 = 400000;
  hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c1.Init.OwnAddress1 = 0x30;
  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 USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_MultiProcessor_Init(&huart1, 0, UART_WAKEUPMETHOD_IDLELINE) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

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

  /* GPIO Ports Clock 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 %drn", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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