IIC读数据疑问：使能IIC清除EV6事件问题

_libra

  /* Clear EV6 by setting again the PE bit */
  I2C_Cmd(I2C1, ENABLE);
STM32 手册并未说  使能IIC  能够清楚 ADDR位 即EV6事件；
而是 失能IIC将由硬件清楚此位；

请大神解惑，不胜感激；

ADDR：地址已被发送(主模式)/地址匹配(从模式) (Address sent (master mode)/matched (slave mode))位1
在软件读取SR1寄存器后，对SR2寄存器的读操作将清除该位，或当PE=0时，由硬件清除该位。

完整函数如下：
void I2C_EE_BufferRead(u8* pBuffer, u8 ReadAddr, u16 NumByteToRead)
{  
  //*((u8 *)0x4001080c) |=0x80;
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY)); // Added by Najoua 27/08/2008   

  /* Send START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  //*((u8 *)0x4001080c) &=~0x80;

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C1, EEPROM_ADDRESS, I2C_Direction_Transmitter);

  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

  /* Clear EV6 by setting again the PE bit */
  I2C_Cmd(I2C1, ENABLE);

  /* Send the EEPROM's internal address to write to */
  I2C_SendData(I2C1, ReadAddr);  

  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send STRAT condition a second time */  
  I2C_GenerateSTART(I2C1, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send EEPROM address for read */
  I2C_Send7bitAddress(I2C1, EEPROM_ADDRESS, I2C_Direction_Receiver);

  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

  /* While there is data to be read */
  while(NumByteToRead)  
  {
    if(NumByteToRead == 1)
    {
      /* Disable Acknowledgement */
      I2C_AcknowledgeConfig(I2C1, DISABLE);

      /* Send STOP Condition */
      I2C_GenerateSTOP(I2C1, ENABLE);
    }

    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))  
    {      
      /* Read a byte from the EEPROM */
      *pBuffer = I2C_ReceiveData(I2C1);

      /* Point to the next location where the byte read will be saved */
      pBuffer++;

      /* Decrement the read bytes counter */
      NumByteToRead--;        
    }   
  }

笑你像狗

所以还是自己再加上清除标志位比较保险

_libra

感觉这句是没用的

北海被害

有用啊，我看手册也是说失能才起作用的，同问；使能外设会先有个失能的过程吗

_libra

wins 还有很多bug呢，改正就好了