两个外部中断对应一个IST的问题。

011fmh

两个外部中断对应一个IST的问题。 [复制链接]

在搞一个磁卡的驱动，磁卡的大致情况我介绍下：
主要有两个磁道，每个磁道由一根数据线和一根时钟线组成，原理很简单：就是当时钟线电平变低时，去读数据线的值就可以了。

一、编程思路是：
1、设置EINT8、EINT9分别对应两个磁道的时钟信号，下降沿触发中断。
2、两个中断绑定在一个Event上，然后在一个IST中WaitForSingleObject等待这个事件；
3、当事件来后，通过判断EINT8、EINT9分别对应的IO口的状态，判断是那个产生的中断，然后相应读数。

二、现在遇到的问题是：当中断产生几次后，就不再响应。而且相应的次数不一样——很奇怪，因为我每次都InterruptDone了啊。

三：相应代码如下：
1、中断和事件的绑定：
[code]dwSysIntr_Track3 = SYSINTR_NOP;
dwHwIntr[0] = -1;
dwHwIntr[1] = OAL_INTR_FORCE_STATIC;
dwHwIntr[2] = IRQ_EINT8;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(dwHwIntr), &dwSysIntr_Track3, sizeof(DWORD), NULL))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Failed to request dwSysIntr_Track3!\r\n")));
      dwSysIntr_Track3 = SYSINTR_UNDEFINED;
      return FALSE;
}

dwSysIntr_Track2 = SYSINTR_NOP;
dwHwIntr[0] = -1;
dwHwIntr[1] = OAL_INTR_FORCE_STATIC;
dwHwIntr[2] = IRQ_EINT9;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(dwHwIntr), &dwSysIntr_Track2, sizeof(DWORD), NULL))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Failed to request dwSysIntr_Track2!\r\n")));
      dwSysIntr_Track2 = SYSINTR_UNDEFINED;
      return FALSE ;
}

hEvent_DoubleTrack = CreateEvent(NULL, FALSE, FALSE, NULL);
if (!InterruptInitialize(dwSysIntr_Track3, hEvent_DoubleTrack, NULL, 0))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] dwSysIntr_Track3 Interrupt Initialization failed!!!\n")));
      bResult = FALSE;
}

if (!InterruptInitialize(dwSysIntr_Track2, hEvent_DoubleTrack, NULL, 0))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] dwSysIntr_Track2 Interrupt Initialization failed!!!\n")));
      bResult = FALSE;
}

hThread_DoubleTrack = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)ThreadFor_DoubleTrack, 0, 0, (LPDWORD)&dwThreadId_DoubleTrack);
if (hThread_DoubleTrack == NULL)
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Thread of DoubleTrack creation error!!!\n")));
      bResult = FALSE;
}

2、IST函数：
[code]while(1)
{
      ret = WaitForSingleObject(hEvent_DoubleTrack, INFINITE);
if((ret==WAIT_OBJECT_0) && (g_KillDoubleThreadTrack==FALSE))
{
//RETAILMSG(MAG_DUG,(TEXT("ret==WAIT_OBJECT_0!!!\r\n")));
if (!(pGPIOregs->GPNDAT & IOSTAT_EINT8)) //EINT8 is active----->Track3
{
         RETAILMSG(MAG_DUG,(TEXT("EINT8 is active----->Track3\r\n")));
if((!(pGPIOregs->GPKDAT & CP_LOW)) && (g_pBrushCard->primal_num_track3 < 1000))
         {
            g_pBrushCard->card_data_track3[g_pBrushCard->primal_num_track3++] = (char)(pGPIOregs->GPKDAT & TRACK3);  //读出GPK2 bit
         }
InterruptDone(dwSysIntr_Track3);
}

if (!(pGPIOregs->GPNDAT & IOSTAT_EINT9)) //EINT9 is active----->Track2
{
         RETAILMSG(MAG_DUG,(TEXT("EINT9 is active----->Track2\r\n")));
if((!(pGPIOregs->GPKDAT & CP_LOW)) && (g_pBrushCard->primal_num_track2 < 300))
         {
            g_pBrushCard->card_data_track2[g_pBrushCard->primal_num_track2++] = (char)(pGPIOregs->GPKDAT & TRACK2);  //读出GPK3 bit
         }
InterruptDone(dwSysIntr_Track2);
}

}
}

四、曾经尝试过一个中断分别对应一个IST，但是因为两个IST之间的切换时间较长，达不到要求，才改成现在这样子，当时中断时能够正常响应的。现在不知为什么，中断进去几次后就突然不再能产生中断了。也就是“RETAILMSG(MAG_DUG,(TEXT("EINT9 is active----->Track2\r\n")));”不再打印输出了。

sunl

代码怎么贴成这样子，再试试：
[code][///Track3 CLK eint8
dwSysIntr_Track3 = SYSINTR_NOP;
dwHwIntr[0] = -1;
dwHwIntr[1] = OAL_INTR_FORCE_STATIC;
dwHwIntr[2] = IRQ_EINT8;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(dwHwIntr), &dwSysIntr_Track3, sizeof(DWORD), NULL))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Failed to request dwSysIntr_Track3!\r\n")));
      dwSysIntr_Track3 = SYSINTR_UNDEFINED;
      return FALSE;
}

//Track2 CLK eint9
dwSysIntr_Track2 = SYSINTR_NOP;
dwHwIntr[0] = -1;
dwHwIntr[1] = OAL_INTR_FORCE_STATIC;
dwHwIntr[2] = IRQ_EINT9;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(dwHwIntr), &dwSysIntr_Track2, sizeof(DWORD), NULL))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Failed to request dwSysIntr_Track2!\r\n")));
      dwSysIntr_Track2 = SYSINTR_UNDEFINED;
      return FALSE ;
}

/*if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, dwHwIntr, sizeof(dwHwIntr), &dwSysIntr_DoubleTrack, sizeof(DWORD), NULL))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Failed to request the EINT8、ENT9 sysintr for Doubletrack.\n")));
      dwSysIntr_DoubleTrack = SYSINTR_UNDEFINED;
      bResult = FALSE;
}*/
hEvent_DoubleTrack = CreateEvent(NULL, FALSE, FALSE, NULL);
if (!InterruptInitialize(dwSysIntr_Track3, hEvent_DoubleTrack, NULL, 0))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] dwSysIntr_Track3 Interrupt Initialization failed!!!\n")));
      bResult = FALSE;
}

if (!InterruptInitialize(dwSysIntr_Track2, hEvent_DoubleTrack, NULL, 0))
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] dwSysIntr_Track2 Interrupt Initialization failed!!!\n")));
      bResult = FALSE;
}

hThread_DoubleTrack = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)ThreadFor_DoubleTrack, 0, 0, (LPDWORD)&dwThreadId_DoubleTrack);
if (hThread_DoubleTrack == NULL)
{
      RETAILMSG(MAG_DUG,(TEXT("[MAG] Thread of DoubleTrack creation error!!!\n")));
      bResult = FALSE;
}]

IST如下：
[code][/while(1)
{
      ret = WaitForSingleObject(hEvent_DoubleTrack, INFINITE);
if((ret==WAIT_OBJECT_0) && (g_KillDoubleThreadTrack==FALSE))
{
//RETAILMSG(MAG_DUG,(TEXT("ret==WAIT_OBJECT_0!!!\r\n")));
if (!(pGPIOregs->GPNDAT & IOSTAT_EINT8)) //EINT8 is active----->Track3
{
         RETAILMSG(MAG_DUG,(TEXT("EINT8 is active----->Track3\r\n")));
if((!(pGPIOregs->GPKDAT & CP_LOW)) && (g_pBrushCard->primal_num_track3 < 1000))
         {
            g_pBrushCard->card_data_track3[g_pBrushCard->primal_num_track3++] = (char)(pGPIOregs->GPKDAT & TRACK3);  //读出GPK2 bit
         }
InterruptDone(dwSysIntr_Track3);
}

if (!(pGPIOregs->GPNDAT & IOSTAT_EINT9)) //EINT9 is active----->Track2
{
         RETAILMSG(MAG_DUG,(TEXT("EINT9 is active----->Track2\r\n")));
if((!(pGPIOregs->GPKDAT & CP_LOW)) && (g_pBrushCard->primal_num_track2 < 300))
         {
            g_pBrushCard->card_data_track2[g_pBrushCard->primal_num_track2++] = (char)(pGPIOregs->GPKDAT & TRACK2);  //读出GPK3 bit
         }
InterruptDone(dwSysIntr_Track2);
}
}
}]

明枫

是否会因为其它地方的代码导致的？
如果不好查可以另外建立一个线程，每过一段时间就输出一下相关寄存器的值，看下是否某些关于中断的寄存器被改了

tenfy

建议你先绑定一个中断分别测试，如果都没有问题，再绑定两个。如果绑定一个都有问题的话，建议先解决掉这个问题再说。

另外，贴代码时，需要将代码放在[code]的中间，如下，
[code]

xzhy

感谢楼上两位前辈的指点，都是很好的找问题的办法！~

但还没等我试，发现了更为奇怪的问题：

pGPIOregs->GPNCON &= ~((0x3<<20) | (0x3<<28));
pGPIOregs->GPNCON |= ((0x2<<20) | (0x2<<28));

复制代码

上面的两句有什么问题吗？
1、第二天早上系统启动开始初始化IO，跑到上面程序第一句时，系统死机（我是一句句打印找到这的）。
2、没办法，将第一句屏蔽掉OK了，光有第二句设置中断也能用——但这个问题着实让我摸不着脑袋！~

后来我将IST处理的程序移到了ISR中直接实现——主要是因为考虑到ISR到IST需要过程时间，1ms以上吧，这时候再去读数据线上的电平就晚了。所以上面的代码基本全部删掉了，因为计时两个ISR对应一个IST，但也有其它IST会切换它。所以…… 两位别骂我啊！~

3、但是后来更奇怪的问题又出现了，我和提供磁卡模块的厂家越好，让帮我调试。我带着板子到了人家那里，再其系统又死了，死的地方还是刚才那，这时候只剩下面这一句了：

pGPIOregs->GPNCON |= ((0x2<<20) | (0x2<<28));

复制代码

把它删掉就能正常启动，但这时候中断不起作用了，当然。
4、现在都怀疑S3C6410的这两个中断脚有bug了。GPN8、GPN9.
5、关于磁卡驱动的问题，我又开了一篇帖子《S3C6410——同一时刻来两个外部中断会怎么样？》先节这个贴了。

两个外部中断 对应一个IST的问题。 [复制链接]

最新回复

两个外部中断对应一个IST的问题。 [复制链接]