// compile with
// $ zig build-obj --release-small -mcpu atmega32u2 -target avr-freestanding-eabi test.zig
// inspect ASM output with
// $ avr-objdump -d -j .progmem.data test.o

const std = @import("std");

pub fn send(data: []const u8) void {
    for (data) |byte| {
        _ = asm volatile (
            \\hello:
            \\        rjmp .+20
            \\goodbye:
            :
            : [byte] "r" (byte)
        );
    }
}

export fn main() void {
    var leds = [_]u16{0} ** 32;
    send(std.mem.sliceAsBytes(leds[0..]));
}