TMS320F28377S: Interrupts: setup

Hey guys,

I'm currently working on a project with the Delfino and ran into a problem when testing interrupts. I have my code set up s.t. whenever GPIO pin 17 receives the HIGH levels of a square-wave input, GPIO pin 18 (an output) is toggled from 0 to 1. Here's my code below. I was also wondering if my function generator was setup correctly for this purpose. I have 3.2 Vpp for the square wave with a 1.5 V offset and a period of 30 us. In addition, I have a 4.7k pull-down resistor before the input.

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <file.h>

#include "F28x_Project.h"     // DSP28x Headerfile
#include "ti_ascii.h"
#include "sci_io.h"
//risky

//#include "Device.h"
//#include "F2837xD_Examples.h"
//###########################################################################
// Global variables used in the project before main function. Declare other     // variables in this section of the code.
//###########################################################################

Uint16 *kittens;  //global pointer kittens
Uint16 bit = 3; //test bit initilized randomly
Uint16 bit_done_flag = 0; //flag to say that interrupt taken
//###########################################################################
// Declare the service routines and functions
//###########################################################################

interrupt void xint1_isr(void);
//interrupt void cpu_timer0_isr(void);
// interrupt void isr1(void);
// void program1(void);
// void program2(void);


//######################   Beginning of the main code #######################


//void main(void)
void main()
{


// Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xD_SysCtrl.c file.
    InitSysCtrl();


// Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
       DINT;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the F2837xD_PieCtrl.c file.
       InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
       IER = 0x0000;
       IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
       InitPieVectTable();
       // Enable global Interrupts and higher priority real-time debug events:
             // EINT;  // Enable Global interrupt INTM

              //ERTM;  // Enable Global realtime interrupt DBGM



       //###########################################################################
       // User specific code: Your code comes here.
       //###########################################################################





       EALLOW;
       PieVectTable.XINT1_INT = &xint1_isr;
       EDIS;

       EALLOW;


       GpioCtrlRegs.GPAQSEL2.bit.GPIO17=1;
       GpioCtrlRegs.GPACTRL.bit.QUALPRD2 = 200;
       //input
       GpioCtrlRegs.GPAGMUX2.bit.GPIO17 = 0;
       GpioCtrlRegs.GPAMUX2.bit.GPIO17 = 0;         // GPIO 46
       GpioCtrlRegs.GPADIR.bit.GPIO17 = 0;          // input
       //GpioCtrlRegs.GPAINV.bit.GPIO17 = 1;
       
       //output probe
       GpioCtrlRegs.GPAGMUX2.bit.GPIO18 = 0;
       GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 0;         // GPIO 46
       GpioCtrlRegs.GPADIR.bit.GPIO18 = 1;          // ouput
       GpioDataRegs.GPASET.bit.GPIO18 = 0;

       GPIO_SetupXINT1Gpio(17);


       XintRegs.XINT1CR.bit.POLARITY = 0;
       XintRegs.XINT1CR.bit.ENABLE = 1;

       PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
       PieCtrlRegs.PIEIER1.bit.INTx4 = 1;
       IER |= M_INT1;
       EDIS;
       EINT;








for(;;){

	DELAY_US(1);
	Uint16 a = GpioDataRegs.GPADAT.bit.GPIO18;
        



}


             

}







//###################### Start of functions codes #############




//#################### Interrupt Service Routines #################

//interrupt void xint1_isr(&*kittens)
//interrupt void xint1_isr()
interrupt void xint1_isr(void)
{
	EALLOW;
       *kittens = 0;
       DELAY_US(1000000);
       GpioDataRegs.GPATOGGLE.bit.GPIO18 = 1;

       /*//while(!GpioDataRegs.GPBDAT.bit.GPIO46){ //2/4 change
       while(!GpioDataRegs.GPBDAT.bit.GPIO46){
       DELAY_US(1);
       *kittens ++;
       */
    EDIS;


       bit_done_flag=1;    //a simple flag to see if interrupt triggered
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;

}
/*interrupt void cpu_timer0_isr(void){
       //CpuTimer0Regs.TCR.bit.TRB = 1;

       GpioDataRegs.GPBSET.bit.GPIO41 = 1;
       //DELAY_US(3000000);
       DELAY_US(1);
       GpioDataRegs.GPBCLEAR.bit.GPIO41 = 1;
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;


       //toggle
}
*/