Hi to all engineers,

I was testing timer0 on 18f242 using ICE2000 emulator for
Some reason the code quits running after a few seconds.
Does my code look correct?


/****************************************************
 *                                  Timer0 test code: pic18f242

 *                                  Andre Abelian:

 *                                  7:15:2003

 *                                  Hi-Tech compiler:

 ****************************************************/
#include <pic18.h>
#include "delay.c"
#define PORTBIT(adr, bit)       ((unsigned)(&adr)*8+(bit))
static bit            led1  @ PORTBIT(PORTB, 0);
static bit            led2  @ PORTBIT(PORTB, 7);

// function decaration
void init(void);

// main program
void main(void)
{
    init();         // setup all
    while(1);
}

/*  interrupt isr */
static void interrupt isr(void)
{
            if (TMR0IF)
            {
            TMR0IF=0;           // clear interrupt flag
            led1^=0x01;
            }
}

/*
 * Init All
 *
 */
void init(void)
{
     TRISB=0x00; // all portb output
             TRISA=0xFF; // all porta all input
             PORTB=0x00; // make sure all leds off
     PORTC=0xFF; // all portc output
/*
 * timer0 setup:
 *
 */
     TMR0ON=1;   // timer0 on
     T08BIT=1;   // timer0  is in 8 bit mode
     T0CS=0;     // internal instruction cycle clock
     T0SE=1;     // increment on high to low
     PSA=0;      // timer0 prescaler is assigned
     T0CON|=0x07; // 1:256 prescale value
/*
 * INTCON Register setup:
 *
 */
     GIE=1;       // Global Interrupt enable
     PEIE=1;      // enable peripheral interrupt
     TMR0IE=1;    // enable TMR0 interrupt
     INT0IE=0;    // disable the INT0 external
     RBIE=0;      // disable Port on change
}



any help will appreciate.


Andre

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