arduinisten/projekte/attiny13/blink.asm

.INCLUDE "tn13def.inc"

; data direction = output
	sbi DDRB, 1 ; PB1

loop:

; clear bit
	cbi PORTB, 1

; wait
; takes roughly ((2+2)*(256*256))/(9.6*1000*1000/8) ~ .218 seconds.
; 2 cycles SBIW + 2 cycles BRNE for 256*256 subtractions
; 9.6 MHz (CKSEL[1..0] = 10) with CKDIV=8
loop1:
 	sbiw ZL, 1
	brne loop1

; set bit
	sbi PORTB, 1

; wait
loop2:
	sbiw ZL, 1
	brne loop2

; again! again! again!
	rjmp loop
erstes attiny13 experiment 14 years ago			`.INCLUDE "tn13def.inc"`

comment blink.asm a bit 14 years ago			`; data direction = output`
erstes attiny13 experiment 14 years ago			`sbi DDRB, 1 ; PB1`
comment blink.asm a bit 14 years ago
erstes attiny13 experiment 14 years ago			`loop:`
comment blink.asm a bit 14 years ago
			`; clear bit`
erstes attiny13 experiment 14 years ago			`cbi PORTB, 1`

comment blink.asm a bit 14 years ago			`; wait`
calc time 14 years ago			`; takes roughly ((2+2)(256256))/(9.610001000/8) ~ .218 seconds.`
			`; 2 cycles SBIW + 2 cycles BRNE for 256*256 subtractions`
			`; 9.6 MHz (CKSEL[1..0] = 10) with CKDIV=8`
erstes attiny13 experiment 14 years ago			`loop1:`
			`sbiw ZL, 1`
			`brne loop1`

comment blink.asm a bit 14 years ago			`; set bit`
erstes attiny13 experiment 14 years ago			`sbi PORTB, 1`

comment blink.asm a bit 14 years ago			`; wait`
erstes attiny13 experiment 14 years ago			`loop2:`
			`sbiw ZL, 1`
			`brne loop2`

comment blink.asm a bit 14 years ago			`; again! again! again!`
erstes attiny13 experiment 14 years ago			`rjmp loop`