external interrupt trigger on both rising and falling edge

Hi Sandhya,

Sandhya Jetti said:

do Action A for rising edge

do Action B for falling edge

Is this possible?

Offcourse, it is very much possible using external interrupts.

Regards,

Gautam

Thanks for your reply Gautam

Is there a flag or register set when it is triggered on rising edge and a different flag when triggered on falling edge?

Sandhya Jetti said:

Is there a flag or register set when it is triggered on rising edge and a different flag when triggered on falling edge?

Refer External Interrupts section in SysCtrl and Interrupts User manual of your device. Also, here are the options:

Regards,

Gautam

I know these registers Gautam, but what I am asking is how to know specifically if it triggers on rising edge and falling edge. I can read the polarity bit but it only tells me that the value is 3 which is trigger on both edges.

    EALLOW;
    GpioCtrlRegs.GPAMUX1.bit.GPIO7 = 0;                 // GPIO
    GpioCtrlRegs.GPADIR.bit.GPIO7 = 0;                  // input
    GpioCtrlRegs.GPAQSEL1.bit.GPIO7 = 0;                // XINT1 Synch to SYSCLKOUT only
    GpioIntRegs.GPIOXINT1SEL.bit.GPIOSEL = 7;              // XINT1 is GPIO7
    EDIS;

    XIntruptRegs.XINT1CR.bit.POLARITY = 3;              // Rising edge interrupt and falling edge
    XIntruptRegs.XINT1CR.bit.ENABLE = 1;                // Enable XINT1

__interrupt void xint1_isr(void)
{
    //Do Action A on rising edge

   //Do Action B on falling edge

  
        PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

Thanks

Sandhya

Simple and great idea Mark!!! It works, too bad I didn't think it myself :)

But thanks a lot :)

-Sandhya