AVR-Chat

This should be a simple thing but I'm having trouble getting it to work.  

I want a regular interrupt every 10ms while using the internal 8Mhz oscillator.  I'm using AVR studio with the default (GCC?) compiler.

Can someone let me know what I'm doing wrong?

I try to set the various timer registers like this:

	TCCR0A = 0x00;
	TCCR0B = 0x05;
	TCNT0 = 177;
	TIMSK = 0x01;

What I'm hoping for here is a timer that will use the div1024 start at 177 and set off the timer int when it overflows at 255.

Then I turn on interrupts

        SEI();


Here is my ISR:

#if __GCC__
SIGNAL(SIG_OVERFLOW0)
#else
#pragma vector=TIMER0_OVF_vect
__interrupt void TIMER0_OVF(void)
#endif
{
	uccounter++;
	TCNT0 = 177;	// reset the timer
	return;
}




uccounter is a global unsigned char.  I just use it to toggle a port when its 0.

Am I missing something and is there a library call that makes setting all this easier?

Thanks.