;Incs and Defs----------------------------------------------------------

.include "atm328p.inc"
.include "global.inc"

;Initialisierungen------------------------------------------------------

.global timer2_init
timer2_init:
	sts		TCCR2A, false						;clear Registers
	sts		TCCR2B, false
	sts		TCNT2, false
	sts		TIMSK2, false

	ldi		timer2_r, (1<<CS20)|(1<<CS21)|(1<<CS22)
	sts		TCCR2B, timer2_r					;Prescaler x1024 (60Hz)
	
	sts		timer2_bool, false					;set Variables
	sts		timer2_cnt, false						
	ret


;Interrupt-Handler------------------------------------------------------

.global timer2_OVF
timer2_OVF:
	push	timer2_r
	lds		timer2_r, timer2_cnt				;Timer-Scaling
	inc 	timer2_r
	lds		temp, timer2_MAX							
	cp		timer2_r, temp
	brne	.+22

;timed actions
	in 		timer2_r, PORTC						;toggle PINC
	lds		temp, timer2_var
	eor		timer2_r, temp
	out		PORTC, timer2_r
	lds		timer2_r, timer2_bool				;toggle Variable
	com		timer2_r
	sts		timer2_bool, timer2_r
	clr 	timer2_r

	sts		timer2_cnt, timer2_r
	pop		timer2_r
	reti