MCU:STM32F407ZET6

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为Slave，从机地址直接在代码中修改，开启中断

以下为main.c中的程序

/* 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
/* USER CODE END PFP */

/* USER CODE BEGIN 4 */
/*retargets the C library printf function to the USART*/
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;
uint8_t flag_1 = 0;
uint8_t flag_2 = 0;
uint8_t flag_3 = 0;
uint8_t flag_4 = 0;
uint8_t flag_5 = 0;
uint16_t rx_len = 0;
uint16_t tx_len = 0;
uint8_t RX_Buffer[256];
uint8_t rx_buff[10] = {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(TransferDirection == I2C_DIRECTION_RECEIVE)      //需要发送
	{
		flag_0++;
		tx_len = 0;
		rx_len = 0;
		t_flag = 1;   //置发送标志
		r_flag = 0;   //清楚读标志
		HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, (tx_buff + rx_buff[0]), 1, I2C_FIRST_FRAME);
//		HAL_I2C_Slave_Transmit_IT(&hi2c1, (tx_buff + rx_buff[0]), 1);   //该函数发送会使总线死掉
	}
	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_Seq_Receive_IT(&hi2c1, rx_buff, 1, I2C_FIRST_AND_NEXT_FRAME);
//		HAL_I2C_Slave_Receive_IT(&hi2c1, rx_buff, 1);                   //该函数接受会使总线死掉
	}
	else
	{}
}

void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)  //监听中断回调
{
	flag_2++;
	HAL_I2C_EnableListen_IT(hi2c); // Restart
}

void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c)  //全部发送完成回调
{
	flag_3++;
	tx_len++;
	HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, (tx_buff + rx_buff[0] + tx_len), 1, I2C_FIRST_FRAME);  //模拟eeprom被读一个字的行为
}
void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c)  //全部接收完成回调
{
	flag_4++;
	RX_Buffer[rx_len] = rx_buff[0];
	rx_len++;                             //接收字节长度
#if 1
	if( (r_flag==1) && (rx_len==2) )      //模拟EEPROM下设寄存器值功能
	{
	  rx_len = 0;
	  tx_buff[RX_Buffer[0]] = RX_Buffer[1];
	  memset(RX_Buffer,0,2);
	}
#endif
	HAL_I2C_Slave_Seq_Receive_IT(&hi2c1, rx_buff, 1, I2C_FIRST_AND_NEXT_FRAME);
}
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,j;

  /* 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, 1, I2C_LAST_FRAME);  //开启从机中断接收

  printf("start i2c test!\n\r");

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
#if 1
	  if (flag_0 > 0)
	  {
		printf("T:%d\n\r",flag_0);
		flag_0 = 0;
	  }
	  if(flag_1 > 0)
	  {
		printf("R:%d\n\r",flag_1);
		flag_1 = 0;
	  }
	  if(flag_2 > 0)
	  {
		printf("lc:%d\n\r",flag_2);
		flag_2 = 0;
	  }
	  if(flag_3 > 0)
	  {
		printf("tc:%d\n\r",flag_3);
		flag_3 = 0;
	  }
	  if(flag_4 > 0)
	  {
		printf("rc:%d\n\r",flag_4);
		flag_4 = 0;
	  }
	  if(flag_5 > 0)
	  {
		  printf("er:%d\n\r",flag_5);
		  flag_5 = 0;
	  }
#endif

	  if(rx_len > 0)
	  {
#if 0
		  HAL_Delay(2000);
		  for(i=0;i<rx_len;i++)
		  {
			  printf("%x ",RX_Buffer[i]);
		  }
		  printf("\n\r");
#endif
		  memset(RX_Buffer,0,rx_len);
		  rx_len = 0;
	  }
	  HAL_Delay(4000);

    /* 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};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 12;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  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_DIV16;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV8;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
  /** Enables the Clock Security System 
  */
  HAL_RCC_EnableCSS();
}

/**
  * @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 = 1000;
  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_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

}

测试效果：

问题：

HAL_I2C_Slave_Transmit_IT 和HAL_I2C_Slave_Receive_IT不能用在连续的接收和发送，可以通过对比seq的看到他们的区别！