ZigEmbeddedGroup / uf2

USB Flashing Format (UF2) for your build.zig

uf2

USB Flashing Format (UF2) for your build.zig

This package is for assembling uf2 files from ELF binaries. This format is used for flashing a microcontroller over a mass storage interface, such as the Pi Pico.

See https://github.com/microsoft/uf2#file-containers for how we're going to embed file source into the format.

For use in a build.zig:

const uf2 = @import("uf2");

pub fn build(b: *Build) void {
    // ...
    const uf2_dep = b.dependency("uf2", .{});

    const uf2_file = uf2.from_elf(uf2_dep, exe, .{ .family_id = .RP2040 });
    _ = b.addInstallFile(uf2_file, "bin/test.uf2");
}

Manually Executing elf2uf2

pub fn build(b: *Build) void {
    // ...

    const uf2_dep = b.dependency("uf2", .{});

    const elf2uf2_run = b.addRunArtifact(uf2_dep.artifact("elf2uf2"));

    // family id
    elf2uf2_run.addArgs(&.{"--family-id", "RP2040"});

    // elf file
    elf2uf2_run.addArg("--elf-path");
    elf2uf2_run.addArtifactArg(exe);

    // output file
    const uf2_file = elf2uf2_run.addPrefixedOutputFileArg("--output-path", "test.uf2");
    _ = b.addInstallFile(uf2_file, "bin/test.uf2");
}