.nolist
#include <avr/io.h>    
.list

.global TIMER2_COMPB_vect
.extern burst 
											              ; Takte
TIMER2_COMPB_vect:							    ; 5, ISR call
	push	r16								          ; 2
	push	r17							      	    ; 2
	in		r17, _SFR_IO_ADDR(SREG)		  ; 1, save SREG
		
	lds		r16, burst						      ; 2
	dec		r16								          ; 1
	brne	TIMER2_COMPB_vect_not_done  ; 1
	sts		TCCR2B, r16						      ; 2, 16 Takte vom ISR Start bis hier her
											              ; r16 is now zero, stop timer 2
TIMER2_COMPB_vect_not_done:			
	sts		burst, r16						      ; 2

	out		_SFR_IO_ADDR(SREG), r17			; 1
	pop		r17								          ; 2
	pop		r16								          ; 2
	reti									            ; 5