Part Number:TMS320F28377S
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
}
*/
