avr-devel

avr-devel is the 8-bit AVR counterpart of esp32-devel: the avr cross toolchain, the build rules, the flashing and a blink template.

Payload	What it provides
toolchains/avr	the avr cross toolchain of the selected board
rules/app	builds the flashable image, reports the firmware size, flashes on xmake install
includes/board	the board options and the avr-gcc / avrdude package definitions
templates/c/avr.blink	xmake create -t avr.blink
modules/*	the board table, the image builder, the flasher and the tool finders

Supported boards: uno, nano (ATmega328P) and mega2560 (ATmega2560).

The toolchain comes from the packages the addon ships, so nothing has to be installed by hand: avr-gcc brings avr-libc, the startup code and the device linker scripts — the entry point is a plain int main(void) — and avrdude writes the image over the serial bootloader of the board, no programmer needed.

Install

$ xmake addon --install avr-devel

Create and build a project

$ xmake create -t avr.blink -l c blink
$ cd blink
$ xmake f --board=uno
$ xmake

[ 38%]: linking.release blink.elf
[ 56%]: generating.release blink.hex

AVR Memory Usage
----------------
Device: atmega328p

Program:     296 bytes (0.9% Full)
Data:         50 bytes (2.4% Full)

Flash and monitor

$ xmake install                    # flash it, the serial port is auto-detected
$ xmake run                        # flash it and then watch the serial output
$ xmake f --port=/dev/ttyUSB0 --baud=57600

Use it in your own project

add_addons("avr-devel")
includes("@addon/avr-devel/board")

target("blink")
    add_rules("@addon/avr-devel/app")
    add_files("src/*.c")

Option	Default	Description
--board	uno	uno, nano or mega2560
--f_cpu	the frequency of the board	the cpu frequency in Hz, e.g. 8000000
--port	auto-detected	the serial port
--baud	the bootloader rate of the board	the flashing baud rate
--monitor_baud	9600	the serial monitor baud rate

Known gaps

Only the serial bootloader is supported, an ISP programmer is not. The prebuilt toolchain has no macOS arm64 build, it runs under Rosetta.