STM32中I2C总线上数据的读、写。

/**
  * @brief  从I2C1总线上的某一器件的某一起始地址中读取一定字节的数据到数组中
  * @param  driver_Addr：I2C器件地址
  * @param  start_Addr：起始字节地址
  * @param  number_Bytes：要读取的字节数量（小于一页）
  * @param  read_Buffer：存放读取数据的数组指针
  * @retval 是否读取成功
  */
u8 I2C1_Read_NBytes(u8 driver_Addr, u8 start_Addr, u8 number_Bytes, u8 *read_Buffer)
{
  uint8_t read_Num;
  u8 I2C_Timeout;
  
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }
  I2C_TransferHandling(I2C1, driver_Addr, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);  //I2C_No_StartStop I2C_Generate_Start_Write
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }
  
  I2C_SendData(I2C1, start_Addr);
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TC) == RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }  

  
  I2C_TransferHandling(I2C1, driver_Addr, number_Bytes,  I2C_AutoEnd_Mode, I2C_Generate_Start_Read);
  
  for(read_Num = 0; read_Num<number_Bytes; read_Num++)
  {
    I2C_Timeout = 200;
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET)
    {
      if((I2C_Timeout--) == 0)
      {
        return 1;
      }
    }      
    read_Buffer[read_Num] = I2C_ReceiveData(I2C1);
  }  
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET);
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }
 
  return 0;
}

u8 I2C1_Write_NBytes(u8 driver_Addr, u8 start_Addr, u8 number_Bytes, u8 *write_Buffer)
{
  u8 write_Num;
  u8 I2C_Timeout;
  
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      //I2C_ClearFlag(I2C1, I2C_FLAG_BUSY);
      return 1;
    }
  }
  I2C_TransferHandling(I2C1, driver_Addr, number_Bytes+1, I2C_AutoEnd_Mode, I2C_Generate_Start_Write);
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }
  
  I2C_SendData(I2C1, start_Addr);
  //while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET);
 
  //I2C_TransferHandling(I2C1, driver_Addr, number_Bytes, I2C_AutoEnd_Mode, I2C_No_StartStop);  
  for(write_Num = 0; write_Num<number_Bytes; write_Num++)
  {
    I2C_Timeout = 200;
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
    {      
      if((I2C_Timeout--) == 0)
      {
        return 1;
      }
    }
    I2C_SendData(I2C1, write_Buffer[write_Num]);    
  }
 
  I2C_Timeout = 200;
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET)
  {
    if((I2C_Timeout--) == 0)
    {
      return 1;
    }
  }
 
  return 0;
}