STM32F767 EEPROM 硬件IIC

/* Private variables ---------------------------------------------------------*/

I2C_HandleTypeDef hi2c2;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C2_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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

/* USER CODE END 0 */

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

  /* 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_I2C2_Init();
  /* USER CODE BEGIN 2 */
	
	delay_init(216);
	char eeprom_data_wr[] = "hello, world!";
	char eeprom_data_rd[50];
	volatile HAL_StatusTypeDef res;
	
	#define EEPROM_DEV_ADDR 0xA0
	
	for(uint8_t i = 0; i < strlen(eeprom_data_wr); i++)
	{
		delay_us(20);
		HAL_I2C_Mem_Write(&hi2c2, EEPROM_DEV_ADDR, i, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&eeprom_data_wr[i], 1, HAL_MAX_DELAY);
	}
	
	delay_ms(20);
	
	for(uint8_t i = 0; i < strlen(eeprom_data_wr); i++)
	{
		delay_us(20);
		HAL_I2C_Mem_Read(&hi2c2, EEPROM_DEV_ADDR, i, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&eeprom_data_rd[i], 1, HAL_MAX_DELAY);
	}

//HAL_I2C_Mem_Write(&hi2c2, EEPROM_DEV_ADDR, 0, I2C_MEMADD_SIZE_8BIT, (uint8_t*)eeprom_data_wr, strlen(eeprom_data_wr), HAL_MAX_DELAY);
//delay_ms(100);
//HAL_I2C_Mem_Read(&hi2c2, EEPROM_DEV_ADDR, 0, I2C_MEMADD_SIZE_8BIT, (uint8_t*)eeprom_data_rd, strlen(eeprom_data_wr), HAL_MAX_DELAY);
	
  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */

  }
  /* USER CODE END 3 */
}

/**
  * @brief I2C2 Initialization Function
  * @param None
  * @retval None
  */
static 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 = 0x10E66A8D;
  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 */

}

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

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();

}

总结 ：
1、

2、

3、
一次读一个地址或者一次写一个字节，且连续读写需要相隔超过5ms
4、可以一次写一个page(AT24C02一个PAGE为8个字节)，写一次需要间隔至少5ms
HAL_I2C_Mem_Write(&hi2c2, EEPROM_DEV_ADDR, 0, I2C_MEMADD_SIZE_8BIT, (uint8_t*)eeprom_data_wr, 8, HAL_MAX_DELAY);
delay_ms(10);
HAL_I2C_Mem_Read(&hi2c2, EEPROM_DEV_ADDR, 0, I2C_MEMADD_SIZE_8BIT, (uint8_t*)eeprom_data_rd, 8, HAL_MAX_DELAY);