difference in timing

sachin.kolkar said:

hi guys,
i m facing problem with timer

Click to expand...

Pommie said:

Unbelievable.

Mike.

Click to expand...

unsigned short counter,second,m;
 void main()
{
TRISB=0x00;
PORTB=0x0F;
T1CON=0b00001001;
TMR1H=0x80;
TMR1L=0x0F;
T1CON.TMR1ON=1;
PIR1.TMR1IF=0;
PIE1.TMR1IE=1;
INTCON=0xC0;
d0
{
 if(counter==30)
{
 counter=0;
second++;
if(second==60)
{
m++;
second=0;
if(m==1)
{
m=0;
PORTB=~PORTB;

}
}
}

}while(1);
}

void interrupt()
{
counter++;
TMR1H=0x80;
TMR1L=0x04;
PIR1.TMR1IF=0;
}

Pommie said:

That is because you don't initialise counter or seconds in your code. Try setting them to zero at the start of your main routine.

Mike.

Click to expand...

Pommie said:

That is because you don't initialise counter or seconds in your code. Try setting them to zero at the start of your main routine.

Mike.

Click to expand...

Pommie said:

Just set them to zero,

Code:

unsigned short counter,second,m;
void main()
{
[COLOR="Blue"]    counter=0;
    second=0;[/COLOR]
    TRISB=0x00;
    PORTB=0x0F;
    T1CON=0b00001001;
    TMR1H=0x80;

You might also consider setting m=0 as well.

Mike.

Click to expand...