pic18f4550 timer 2 interrupt

[john blue]

Hi,

I am trying to use timer 2 interrupt, but the tm2if flag did not set. Anyone can help to check whether whats wrong with my code? I am using Hi Tech C. Thanks

#include <htc.h>
#include <stdio.h>
#include "isr.h"
#define USE_OR_MASKS 
#include "plib.h"

//Chip Settings
__CONFIG(1,0x0200);
__CONFIG(2,0X1E1F);
__CONFIG(3,0X8100);
__CONFIG(4,0X00C1);
__CONFIG(5,0XC00F);



void main(){

while(1){

	TRISD7 = 1;
	TRISD6 = 0;
	
	TRISD0 = 0;
	TRISD1 = 0;
	TRISD2 = 0; 	
	TRISD5 = 0;

	//.5mA,5mA,50mA
	RD0 = pulse;
	RD1 = 1;
	RD2 = 1;

	RD5 = 0;
	
 	CMCON = 0x01;   //Outputs' Mode

  	TRISA0 = 1;    // Configure as input pin for negative input of Comparator 1
    TRISA3 = 1;    // Configure as input pin for positive input of Comparator 1
//	TRISA4 = 0;    // Output
	TRISA4 = 1;    // Input for proteus sim
	TRISA1 = 1;

	RA4 = C1OUT;
     
	//Interrupt enable
	IPEN = 1;
	GIEH=1;																	
		
	PEIE=1;

	TMR2IF = 0;
	TMR2IE = 1; 
	ei();


	T2CON = 56;
	TMR2ON = 1;
	PR2 = 246;

	
  T2CKPS0 = 0;
  T2CKPS1 = 0;
 
 T2OUTPS0 = 0;
 T2OUTPS1 = 1;
 T2OUTPS2 = 1;
 T2OUTPS3 = 1;
	TMR2IP = 1;


	//startup
	if(!RD7){
	RD6 = 1;
	}
	
}

	
}

 

[Pommie]

As you haven't posted your ISR code, it's difficult to comment.

My guess would be that the code may not even be running due to the wrong config values. Had you used the Microchip labels, instead of silly hex values, I would have been able to check them.

Mike.