stm8 硬件iic 从机无法接受数据

losin · 发表于 2015-12-26 16:21:32

stm8 硬件iic 从机无法接受数据，接受到地址，并且已应答，
void  IIC_GPIO_INIT()
{
/*  配置IIC的IO口  为上拉输入*/
  //CLK->PCKENR1 |=0X01;
  GPIOB->DDR &= ~0x30;
  GPIOB->CR1 |= 0x30;
  GPIOB->CR2 &= ~0x30;

}
void IIC_INIT(void)
{

  I2C->CR1 = 0x00;
  I2C->CR2 =0x04; //使能应答
  I2C->FREQR = 0x10; // Set I2C Freq value (16MHz)

  I2C->OARH |= 0x40;
  I2C->OARL = (SLAVE_ADDRESS );
  I2C->CR1 = 0x01;
  I2C->CR2 = 0X04;
  I2C->CR2  |= 0x02;

  I2C->ITR |= 0x07; //开启中断



}

/**
  * @brief I2C Interrupt routine.
  * @param  None
  * @retval None
  */
INTERRUPT_HANDLER(I2C_IRQHandler, 19)
{
  uint8_t temp1=0;
  uint8_t temp2=0;
  temp1=I2C->SR1;
  temp2=I2C->SR3;
  uint8_t data;
if((I2C->SR1 & 0X02)==0x02) // 判读地址是否匹配
{

   I2C->CR2 |= 0X04;
   I2C->SR1&=~(0x04);
}
if((I2C->SR1&0x10)==0x10) //检测到停止位
{
   temp1 = I2C->SR1;
   I2C->CR2|=0x04;

}
if((I2C->SR1&0x40) == 0x40) //接收数据
{
   data= I2C->DR;
   if(IIC_RX_Finish==0)
   {
      IIC_RecBuffer[IIC_RX_NUM]=data;
      IIC_RX_NUM++;
      if(IIC_RX_NUM>=1){IIC_RX_Finish=1;IIC_RX_NUM=0; I2C->ITR = 0x00;}
      I2C->CR2 |= 0X04;//应答
   }
}
}