微處理器 - Microchip ATtiny13 - Assembly - Sleep

參考資訊：
https://www.microchip.com/en-us/product/attiny13#Documentation
https://nerdathome.blogspot.com/2008/04/avr-as-usage-tutorial.html

本練習使用Power-down模式


main.s

    .equ PCMSK, 0x15
    .equ PINB,  0x16
    .equ DDRB,  0x17
    .equ PORTB, 0x18
    .equ GIMSK, 0x3b
    .equ MCUCR, 0x35
  
    .equ BTN,   0
    .equ LED,   1
  
    .org 0x0000
    rjmp main
    reti
    rjmp pcint0_handler
  
    .org 0x0010
main:
    sbi DDRB, LED
    cbi DDRB, BTN
    sbi PORTB, LED
    sbi PORTB, BTN
    ldi r16, 0x20
    out GIMSK, r16
    ldi r16, 0x01
    out PCMSK, r16
    ldi r16, 0x30
    out MCUCR, r16
    sei
    sleep
    cbi PORTB, 1

loop:
    rjmp loop

pcint0_handler:
    reti

編譯和燒錄

$ avr-as -mmcu=attiny13 -o main.o main.s
$ avr-ld -o main.elf main.o
$ avr-objcopy --output-target=ihex main.elf main.ihex
$ sudo avrdude -c usbasp -p t13 -B 1024 -U flash:w:main.ihex:i

完成