F28377外部中断问题

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jcky001|

楼主 | 2020-12-7 10:56 | 只看该作者回帖奖励

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外部中断, pi, gp, IO, GPIO

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。
这个例程：external_interrupt#include "F28x_Project.h"
interrupt void xint3_isr(void);
#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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