STM32篇——IIC通信

//I2C1对象
 I2C_HandleTypeDef hi2c1;
 //根据配置自动生成初始化代码，并在main函数中进行了调用
 static void MX_I2C1_Init(void)
{
  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();
  }

HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout);
HAL_I2C_Mem_Read (I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout);

//IIC全局变量
#define ADDR_WR_AT24CXX 0xA0 //写器件地址
#define ADDR_RD_AT24CXX 0xA1 //读器件地址
#define BuffSize 256
uint8_t Wr_buff[BuffSize],Rd_buff[BuffSize];//读写数据buff

//EEPROM测试
void EEPROM_IIC_Test(void)
{
    HAL_StatusTypeDef error;
    uint8_t length = 8 ;
    for(uint16_t i = 0;i<256;i++) Wr_buff[i] = i;
    //AT24Cxx地址00开始写入8Byte数据
    error = HAL_I2C_Mem_Write(&hi2c1,ADDR_WR_AT24CXX,0x00,I2C_MEMADD_SIZE_16BIT,Wr_buff,length,1000);
    if(error == HAL_OK) printf("eeprom write done!\r\n");
    else                printf("eeprom write fail!\r\n");
    HAL_Delay(1000);
    //从地址0x00开始读8Byte数据，并打印。
    error = HAL_I2C_Mem_Read(&hi2c1,ADDR_RD_AT24CXX,0x00,I2C_MEMADD_SIZE_16BIT,Rd_buff,length,1000);
    if(error == HAL_OK)
    {
        printf("eeprom read done!\r\n");
        for(uint16_t i=0;i<length;i++)
        {
            printf("0x%02x ",Rd_buff[i]);
        }
        printf("\r\n");
    }
    else  printf("eeprom write fail!\r\n");
}