Tool/software: Code Composer Studio
Hello friends, I have issue to set GPIO38 as a External interrupt pin for TMS320F28335. Please Guide me in right direction for to configure GPIO.I have configure Gpio as per mentioned below.
#define INPUT 0
GpioCtrlRegs.GPBMUX1.bit.GPIO38 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO38= INPUT;
EALLOW;
PieVectTable.XINT3 = &fpga_GPIO_interrupt_isr; // register ISR in interrupt vector table
EDIS;
PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable PIE block
PieCtrlRegs.PIEIER1.bit.INTx3 = 1; // Enable PIE Group 1 INT3
PieCtrlRegs.PIEACK.bit.ACK3 = 0;
IER |= M_INT1; // Enable CPU interrupt 1
EINT; // Enable Global Interrupt
EALLOW;
GpioCtrlRegs.GPACTRL.bit.QUALPRD0 = 0xFF; //Each Sample window is 510*SYSCLKOUT
GpioCtrlRegs.GPBQSEL1.bit.GPIO38 = 0; //Xint1 Synch to SYSCLKOUT only
GpioIntRegs.GPIOXINT3SEL.bit.GPIOSEL = 38; //tag XINT3 interrupt with GPIO38
EDIS;
XIntruptRegs.XINT3CR.bit.POLARITY = 1; //Detect interrupt on rising edge of GPIO38
XIntruptRegs.XINT3CR.bit.ENABLE = 1; //Enable XINT3
and isr of that GPIO is
__interrupt void fpga_GPIO_interrupt_isr(void)
{
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
i put break point on PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; but code does not reach to that point
