; timer functions

TIMER1_INIT:

	; clock select, prescaler 8
	in tmp1,TCCR1B
	cbr tmp1,(1<<CS12)
	sbr tmp1,(1<<CS11)
	cbr tmp1,(1<<CS10)
	out TCCR1B,tmp1

	ret

TIMER1_INT_ENABLE:

	; overflow interrupt enable
	in tmp1,TIMSK
	sbr tmp1,(1<<TOIE1)
	out TIMSK,tmp1

	ret

TIMER1_INT_DISABLE:

	; overflow interrupt disable
	in tmp1,TIMSK
	cbr tmp1,(1<<TOIE1)
	out TIMSK,tmp1

	ret