串口、以太网中断嵌套，串口只能接收一次数据。

只看该作者 · 2013-8-15 16:55

使用串口中断接收数据，单独的一个中断时接收正常。
if (USART_GetITStatus(EVAL_COM2, USART_IT_RXNE) != RESET)//发生接收中断
  {
uint8_t RxData=0;
//RxData=    EVAL_COM2_ReceiveChar();
/* received data */
while( EVAL_COM2_ReceiveChar()!=0x55);
      USART_Rx_Buffer[0] = 0x55;
while(ByteCount <= 12)
{
   USART_Rx_Buffer[i++] = EVAL_COM2_ReceiveChar();  //接收
   ByteCount++;
}
USART_ClearITPendingBit(EVAL_COM2,  USART_IT_RXNE); //清除中断标志
}
但是加上以太网中断以后就会出现串口中断只接收一次数据的情况，放置断电调试时会碰到Failed to set breakpoint at 0x08009E04(out of hardware breakpoints),后面接着运行还有at 0xFFFFFFF8(this area does not support hardware breakpoints)
  NVIC_InitStructure.NVIC_IRQChannel = ETH_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /*串口中断优先级pre-emption priority ,子优先级 */
  NVIC_InitStructure.NVIC_IRQChannel = EVAL_COM2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  //NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
中断都开启了，不知道是什么原因造成的，大家有没有碰到过，给点意见？谢谢
使用的107芯片，两天了木有进展

只看该作者 · 2013-8-15 17:00

while( EVAL_COM2_ReceiveChar()!=0x55);是判断报文的头部，
接收函数是
uint8_t EVAL_COM2_ReceiveChar(void)
{
while(USART_GetFlagStatus(EVAL_COM2, USART_FLAG_RXNE) == RESET);
return(USART_ReceiveData(EVAL_COM2));
}
采用这种方法也是参考网上的例子，不知道是不是有什么缺陷，但是单独使用串口中断是没有问题的，波特率是57600