Atmel ATSTK500 500 Starter kit and development system. ATSTK500 ATSTK500 Hoja De Datos

Los códigos de productos

ATSTK500

AVR STK500 User Guide

9-1

Rev. 1925C–AVR–3/03

Section 9

Example Applications

9.1

Using LEDs and
Switches

Connect PORTB to LEDS and PORTD to SWITCHES.

LEDs will operate differently depending on what switch is pressed.

Tip: Copy the code from this document into AVR Studio.

;***** STK500 LEDS and SWITCH demonstration

.include “8515def.inc”

.def Temp

=r16 ; Temporary register

.def Delay

=r17 ; Delay variable 1

.def Delay2

=r18

; Delay variable 2

;***** Initialization

RESET:

ser

Temp

out

DDRB,Temp

; Set PORTB to output

;**** Test input/output

LOOP:

out

PORTB,temp

; Update LEDS

sbis

PIND,0x00

; If (Port D, pin0 == 0)

inc

Temp

; then count LEDS one down

sbis

PIND,0x01

; If (Port D, pin1 == 0)