Avr Assembler [best] Download Page

avr-gcc -mmcu=atmega328p -c blink.asm -o blink.o avr-gcc -mmcu=atmega328p blink.o -o blink.elf avr-objcopy -O ihex blink.elf blink.hex Or using original AVRASM32:

; Blink LED on PB5 (Arduino Uno pin 13) – ATmega328P .nolist .include "m328pdef.inc" ; Register names .list .org 0x0000 rjmp RESET avr assembler download

LOOP: ; Turn LED on sbi PORTB, 5 ldi r16, 0xFF call DELAY ; Turn LED off cbi PORTB, 5 ldi r16, 0xFF call DELAY rjmp LOOP avr-gcc -mmcu=atmega328p -c blink

sudo apt update sudo apt install gcc-avr avr-libc avrdude binutils-avr That's it. You now have avr-as , avr-ld , avr-objcopy , and avrdude . Install Homebrew first, then: Welcome

DELAY: ; Delay loop (approximate) ldi r17, 0xFF L1: ldi r18, 0xFF L2: dec r18 brne L2 dec r17 brne L1 dec r16 brne DELAY ret

So, you want to blink an LED by talking directly to the metal? Welcome.