DSP28335外部中断进不了的问题？

只看该作者 · 2016-5-24 20:57

我用了DSP28335的五个外部中断，初步测试都正常，但是当我在while(1)中加入数码管显示程序后XINT1和XINT2就不好使了，XINT1有时能触发有时不行，XINT2几乎都触发不了，数码管显示正常，我XINT1和XINT2是用按键开关触发的，请问这是为什么？该怎么解决呢？
下面是程序
   while(1)
   {
   Show_Data();
   }

__interrupt void xint1_isr(void)
{
GpioDataRegs.GPBCLEAR.all = 0x4; // GPIO34 is low
Xint1Count++;
GpioDataRegs.GPATOGGLE.bit.GPIO31 = 1;
GpioDataRegs.GPATOGGLE.bit.GPIO30 = 1;
if(ModeSelect == InternalMode)
ModeSelect = ExternalMode;
else
ModeSelect = InternalMode;
// Acknowledge this interrupt to get more from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

__interrupt void xint2_isr(void)
{
GpioDataRegs.GPBCLEAR.all = 0x4; // GPIO34 is low
Xint2Count++;
GpioDataRegs.GPATOGGLE.bit.GPIO29 = 1;
if(LockButton == OutputUnlock)
LockButton = OutputLock;
else
LockButton = OutputUnlock;
// Acknowledge this interrupt to get more from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

void Show_Data(void)
{
int i,j;
Uint16 tempV,tempF;
tempV = VoltageExp;
tempF = FrequencyExp/10;
for(i=7;i>=4;i--)  //后四位依次扫描？
{
j = tempF%10;
      HC595_IN(wei[i]);  //先传位码
      if(i==5)
        HC595_IN(duan[j]&0xfe);  //再传段码
      else
        HC595_IN(duan[j]);  //再传段码
      HC595_OUT();
      tempF = tempF/10;
      asm(" NOP");asm(" NOP");asm(" NOP");asm(" NOP");
}
for(i=3;i>=0;i--)  //前四位依次扫描
{
j = tempV%10;
      HC595_IN(wei[i]);  //先传位码
      HC595_IN(duan[j]);  //再传段码
      HC595_OUT();
      tempV = tempV/10;
      asm(" NOP");asm(" NOP");asm(" NOP");asm(" NOP");
}
}

只看该作者 · 2016-5-26 21:52

XINT1有时能触发有时不行，XINT2几乎都触发不了

首先先检查硬件连接有没有问题

DSP28335外部中断进不了的问题？

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