timer.c

TMS320F2812 cpu_timer0_isr and GPIO is run. timer0 is run frequently. GPIO is run in timer0.

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "timer.h"

interrupt void cpu_timer0_isr(void);

void init_gpio(void){
		EALLOW;
		GpioMuxRegs.GPAMUX.all=0x0000;
		GpioMuxRegs.GPADIR.all=0xffff; // PA DIR: 1=output,0=input
		GpioMuxRegs.GPAQUAL.all=0x0000; // PA Input Qualification:
		
		GpioMuxRegs.GPBMUX.all=0x0000;
		GpioMuxRegs.GPBDIR.all=0xffff; // PA DIR: 1=output,0=input
		GpioMuxRegs.GPBQUAL.all=0x0000; // PA Input Qualification:
		EDIS;
}

interrupt void cpu_timer0_isr(void)
{
   CpuTimer0.InterruptCount++;
   // Acknowledge this interrupt to receive more interrupts from group 1
   PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
   
   cputimer0_f = 1;
}

void main(void)
{
	InitSysCtrl();
	init_gpio();
	DINT;
	InitPieCtrl();
	IER = 0x0000;
	IFR = 0x0000;
	InitPieVectTable();

	EALLOW;  // This is needed to write to EALLOW protected registers
	PieVectTable.TINT0 = &cpu_timer0_isr;
	EDIS; 		// This is needed to disable write to EALLOW protected registers
	InitCpuTimers();
	ConfigCpuTimer(&CpuTimer0, 150, 25000);
	StartCpuTimer0();
	IER |= M_INT1; // for TINT0
	PieCtrlRegs.PIEIER1.bit.INTx7 = 1;

	EINT;
	ERTM;

  for(;;)	{
  	if(cputimer0_f == 1)	{
  		
  		GpioDataRegs.GPATOGGLE.bit.GPIOA0 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA1 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA2 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA3 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA4 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA5 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA6 =1;
  		GpioDataRegs.GPATOGGLE.bit.GPIOA7 =1;
  		
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB0 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB1 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB2 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB3 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB4 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB5 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB6 =1;
  		GpioDataRegs.GPBTOGGLE.bit.GPIOB7 =1;
  		
  		cputimer0_f = 0;
  	}	
  }
}