Blinky example copied from microzig-examples

build.zig

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+const std = @import("std");
+const rp2040 = @import("rp2040");
+
+const available_examples = [_]Example{
+    .{ .name = "pico_adc", .target = rp2040.boards.raspberry_pi.pico, .file = "src/adc.zig" },
+    .{ .name = "pico_blinky", .target = rp2040.boards.raspberry_pi.pico, .file = "src/blinky.zig" },
+    // TODO: Fix multicore hal! .{ .name = "pico", .target = rp2040.boards.raspberry_pi.pico , .file = "src/blinky_core1.zig" },
+    .{ .name = "pico_flash-program", .target = rp2040.boards.raspberry_pi.pico, .file = "src/flash_program.zig" },
+    .{ .name = "pico_gpio-clk", .target = rp2040.boards.raspberry_pi.pico, .file = "src/gpio_clk.zig" },
+    .{ .name = "pico_i2c-bus-scan", .target = rp2040.boards.raspberry_pi.pico, .file = "src/i2c_bus_scan.zig" },
+    .{ .name = "pico_pwm", .target = rp2040.boards.raspberry_pi.pico, .file = "src/pwm.zig" },
+    .{ .name = "pico_random", .target = rp2040.boards.raspberry_pi.pico, .file = "src/random.zig" },
+    .{ .name = "pico_spi-master", .target = rp2040.boards.raspberry_pi.pico, .file = "src/spi_master.zig" },
+    .{ .name = "pico_squarewave", .target = rp2040.boards.raspberry_pi.pico, .file = "src/squarewave.zig" },
+    .{ .name = "pico_uart", .target = rp2040.boards.raspberry_pi.pico, .file = "src/uart.zig" },
+    .{ .name = "pico_usb-device", .target = rp2040.boards.raspberry_pi.pico, .file = "src/usb_device.zig" },
+    .{ .name = "pico_usb-hid", .target = rp2040.boards.raspberry_pi.pico, .file = "src/usb_hid.zig" },
+    .{ .name = "pico_ws2812", .target = rp2040.boards.raspberry_pi.pico, .file = "src/ws2812.zig" },
+
+    .{ .name = "rp2040-matrix_tiles", .target = rp2040.boards.waveshare.rp2040_matrix, .file = "src/tiles.zig" },
+
+    //     .{ .name = "rp2040-eth", .target = rp2040.boards.waveshare.rp2040_eth },
+    //     .{ .name = "rp2040-plus-4m", .target = rp2040.boards.waveshare.rp2040_plus_4m },
+    //     .{ .name = "rp2040-plus-16m", .target = rp2040.boards.waveshare.rp2040_plus_16m },
+};
+
+pub fn build(b: *std.Build) void {
+    const microzig = @import("microzig").init(b, "microzig");
+    const optimize = b.standardOptimizeOption(.{});
+
+    for (available_examples) |example| {
+        // `addFirmware` basically works like addExecutable, but takes a
+        // `microzig.Target` for target instead of a `std.zig.CrossTarget`.
+        //
+        // The target will convey all necessary information on the chip,
+        // cpu and potentially the board as well.
+        const firmware = microzig.addFirmware(b, .{
+            .name = example.name,
+            .target = example.target,
+            .optimize = optimize,
+            .source_file = .{ .path = example.file },
+        });
+
+        // `installFirmware()` is the MicroZig pendant to `Build.installArtifact()`
+        // and allows installing the firmware as a typical firmware file.
+        //
+        // This will also install into `$prefix/firmware` instead of `$prefix/bin`.
+        microzig.installFirmware(b, firmware, .{});
+
+        // For debugging, we also always install the firmware as an ELF file
+        microzig.installFirmware(b, firmware, .{ .format = .elf });
+    }
+}
+
+const Example = struct {
+    target: @import("microzig").Target,
+    name: []const u8,
+    file: []const u8,
+};

build.zig.zon

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+.{
+    .name = "microzig-raspberrypi-rp2040-examples",
+    .version = "0.1.0",
+    .dependencies = .{
+        .microzig = .{
+            .url = "https://github.com/ZigEmbeddedGroup/microzig/archive/c6c9ec4516f57638e751141085c9d76120990312.tar.gz",
+            .hash = "1220af58bdaa721b8189f3a7adfda660517dd354463463388e96d69fe4ceccf80b92",
+        },
+        .rp2040 = .{
+            .url = "https://github.com/ZigEmbeddedGroup/raspberrypi-rp2040/archive/67d36eebb0fbd89633db1a51d6d2bcb049f2066a.tar.gz",
+            .hash = "122094bf268f45b188f3916f9e5964f4257414afaafba98a455ac47d25389a456832",
+        },
+    },
+}

src/blinky.zig

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+const std = @import("std");
+const microzig = @import("microzig");
+const rp2040 = microzig.hal;
+const time = rp2040.time;
+
+const pin_config = rp2040.pins.GlobalConfiguration{
+    .GPIO25 = .{
+        .name = "led",
+        .direction = .out,
+    },
+};
+
+pub fn main() !void {
+    const pins = pin_config.apply();
+
+    while (true) {
+        pins.led.toggle();
+        time.sleep_ms(250);
+    }
+}