中断处理程序内部的中断插针读取问题该怎么处理？

我在PIC24FJ256GB110上有一个连接到外部中断的线路。我需要让系统在这条线的前缘和下降边都打断我。这是用来从外部从属设备上连接串行传输的。我想现在把它变成一个关于改变的中断已经太晚了。该板已经布置好了。升高线表示有一包数据正从串行线传送到uart 1。当从机完成后，它丢弃了线路。UART1通过MCC构建文件在中断驱动模式下运行。在外部中断例程中，我需要确定是上升沿还是下降沿发生了。我的逻辑是：inter._handler(){if(外部中断线路1是)high) //我们看到上升沿中断处理它，然后重新编程端口以在下降沿上生成中断，否则处理下降沿代码，并且重新编程外部中断以在上升沿上中断。变消极。是否可以读取中断处理程序中的中断行？这段代码不起作用，因为它永远不会进入在上升沿中断的情况，尽管您可以清楚地看到上升沿确实发生了。连续发送数据包，因此在中断发生的时候，实际端口值已经很长时间了，因为它长1.8毫秒。我试图首先读取端口E（外部中断在PE8，PE9上），但是这似乎没有反映它到达这里的情况。void_.((inter.，no_auto_psv))INT1Inter.(void){static char trash=0;if(EX_INT1_GetValue()==1)//low到high，传入数据{DeBUG3_OUT=1;<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<永远不会到达这里……EX_INT2_NegativeEdgeSet()；//PROGRAM FOR NEGATIVE TRIGGER reset_uart_1_state()；//启用和配置uart缓冲区并启用中断}.{//1至0 EX_INT2_PositiveEdgeSet()；//为上升沿中断UART1_ReadBuffer(&._._.[0]，24)对其进行编程；set_uart_1_state()；UART1_Inter..ble()；//禁用uart接收上的中断，直到我们重新启用它们，._._.[24]=(无符号char)((毫秒>24)&0x000000000FF)；._._.[25]=(无符号char)((毫秒>16)&0x000000FF)；(毫秒>SurvivEdPayTeTeLe[（26）] =（无符号char）（（毫秒& gt；8）& 0x000 00 000 FF）；



      以下为原文

    I have a line connected to an external interrupt on a PIC24FJ256GB110.  I need to have the system interrupt me on both the leading edge and the falling edge of this line.  This is used to bracket a serial transmisison from an external slave.  It is to late to change this to an interrupt on change, I think.  The board has already been laid out.

Raising the line, is an indication that a packet of data is coming down the serial line to uart 1.  When the slave has finished, it
drops the line.
UART1 is running in interrupt driven mode via the MCC built files.
Within the external interrupt routine, I need to figure out whether a rising edge or falling edge happened.
My logic wants to be:
interrupt_handler()
{
      if (the external interrupt line 1 is high)    // we saw a rising edge interrupt
         process it, then reprogram the port to generate an interrupt on the falling edge
     else
         process the falling edge code, and reprogram the external interrupt to interrupt on a rising edge.

The problem is that it always sees the external interrupt line as going negative.  
Is it possible to read the interrupt line within the interrupt handler?
This code does not work, in that it never get into case where it was interrupted on a rising edge, though you can
clearly see that the rising edge does indeed occur.
With the debugger, set for a break point in both sections of the if EX_INT1_GetValue() test, it only hits the falling edge.

The slave is continuously sending packets, so by the time the break happens, the actual port value is long gone, since it is 1.8 ms long.  I tried reading the port E first thing in (the external interrupts are on PE8,PE9), but that does not seem to reflect
what it was when it got here.


void __attribute__((interrupt, no_auto_psv)) _INT1Interrupt(void)
{
static char trash=0;
    if(EX_INT1_GetValue()==1) // low to high, incoming data
        {
         DEBUG3_OUT=1; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<          EX_INT2_NegativeEdgeSet(); // PROGRAM FOR NEGATIVE TRIGGER
         reset_uart_1_state(); // enable and configure uart buffer and enables interrupt
        }
   else
        { // 1 to 0
        EX_INT2_PositiveEdgeSet(); // program it for a rising edge interrupt
        UART1_ReadBuffer(&received_packet_left[0], 24);
        reset_uart_1_state();
       UART1_InterruptDisable(); // disable interrupts on uart reception until we re-enable them
       received_packet_left[24]= (unsigned char) ((milliseconds >> 24 ) & 0x000000FF);
       received_packet_left[25]= (unsigned char) ((milliseconds >> 16 ) & 0x000000FF);
       received_packet_left[26]= (unsigned char) ((milliseconds >> 8 ) & 0x000000FF);
       received_packet_left[27]= (unsigned char) ((milliseconds ) & 0x000000FF);
       received_state_left=RX_DONE;
       DEBUG3_OUT=0;
       }
EX_INT1_InterruptFlagClear();
}

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