STM8 中I2C读写函数

void I2C_write(u8 Addr, u8 *WriteData, u8 length)

{

  /* Send STRAT condition */

  I2C_GenerateSTART(ENABLE);

  /* Test on EV5 and clear it */

  while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT)); 

  /* Send EEPROM address for write */

  I2C_Send7bitAddress(Addr, I2C_DIRECTION_TX);  

  /* Test on EV6 and clear it */

  while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));

   I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);// must add   

  for(int i = 0; i  {

    I2C_SendData(WriteData[i]); 

    /* Test on EV8 and clear it */

    while (!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTING));    

  }  

  /* Send STOP condition */

  I2C_GenerateSTOP(ENABLE);  

}

void I2C_Read(u8* pBuffer, u8 ReadAddr, u8 NumByteToRead)

{    

 while(I2C->SR3&0x02);

 I2C->CR2 |= 0x01;

 while(!(I2C->SR1 & 0x01));

 I2C->DR = ReadAddr;

 while(!(I2C->SR1 & 0x02)); 

 I2C->SR1; 

 I2C->SR3;

 while(NumByteToRead)  

{

  if(NumByteToRead == 1) 

    {

      I2C->CR2 &= ~0x04; 

      I2C->CR2 |= 0x02; 

    }  

    if(I2C->SR1 & 0x40)

    {   

      *pBuffer=I2C->DR;

       pBuffer++;  

       NumByteToRead--;        

    }      

  }   

  I2C->CR2 |= 0x04;

}