按照例程修改的程序，可是例程能实现的功能，我自己接一个开关（开关一端接地，另一端接GPIO），就无法实现中断的功能。请各位指出我的错误，谢谢。- #define DELAY (CPU_RATE/1000*6*510) //Qual period at 6 samplesvoid main(void)
- { InitSysCtrl();
- // InitGpio(); // Skipped for this example
- DINT;
- InitPieCtrl();
- IER = 0x0000;
- IFR = 0x0000;
- InitPieVectTable();
- EALLOW;
- PieVectTable.XINT3_INT = &xint3_isr;
- EDIS;
- PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
- PieCtrlRegs.PIEIER12.bit.INTx1 = 1;
- IER |= M_INT12;
- EINT;
- EALLOW;
- GpioDataRegs.GPASET.bit.GPIO31 = 1;
- GpioCtrlRegs.GPAMUX2.bit.GPIO31 = 0; // GPIO
- GpioCtrlRegs.GPADIR.bit.GPIO31 = 1; // output
- EDIS;
- EALLOW;
- GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 0; // GPIO
- GpioCtrlRegs.GPBDIR.bit.GPIO33 = 0; // input
- GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 0;
- EDIS;
- GPIO_SetupXINT3Gpio(33);
- XintRegs.XINT3CR.bit.POLARITY = 0; // Falling edge interrupt
- XintRegs.XINT3CR.bit.ENABLE = 1; // Enable XINT3
- for(;;)
- {
- }
- }
- interrupt void xint3_isr(void)
- {
- GpioDataRegs.GPATOGGLE.bit.GPIO31 = 1;
- PieCtrlRegs.PIEACK.all = PIEACK_GROUP12;
- }
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