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83 lines
2.2 KiB
Zig
83 lines
2.2 KiB
Zig
const micro = @import("microzig");
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// Configures the led_pin and uart index
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const cfg = if (micro.config.has_board)
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switch (micro.config.board_name) {
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.@"mbed LPC1768" => .{
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.led_pin = micro.Pin("LED-1"),
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.uart_idx = 1,
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.pins = .{},
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},
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.STM32F3DISCOVERY => .{
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.led_pin = micro.Pin("LD3"),
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.uart_idx = 1,
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.pins = .{},
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},
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.STM32F4DISCOVERY => .{
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.led_pin = micro.Pin("LD5"),
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.uart_idx = 2,
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.pins = .{ .tx = micro.Pin("PA2"), .rx = micro.Pin("PA3") },
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},
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.@"Longan Nano" => .{
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.led_pin = micro.Pin("PA2"),
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.uart_idx = 1,
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.pins = .{ .tx = null, .rx = null },
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},
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.@"Arduino Uno" => .{
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.led_pin = micro.Pin("D13"),
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.uart_idx = 0,
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.pins = .{},
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},
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else => @compileError("unknown board"),
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}
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else switch (micro.config.chip_name) {
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.@"NXP LPC1768" => .{ .led_pin = micro.Pin("P1.18"), .uart_idx = 1, .pins = .{} },
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.GD32VF103x8 => .{ .led_pin = micro.Pin("PA2"), .uart_idx = 1, .pins = .{} },
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else => @compileError("unknown chip"),
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};
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pub fn main() !void {
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const led = micro.Gpio(cfg.led_pin, .{
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.mode = .output,
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.initial_state = .low,
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});
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led.init();
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var uart = micro.Uart(cfg.uart_idx, cfg.pins).init(.{
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.baud_rate = 9600,
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.stop_bits = .one,
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.parity = null,
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.data_bits = .eight,
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}) catch |err| {
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blinkError(led, err);
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micro.hang();
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};
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var out = uart.writer();
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while (true) {
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led.setToHigh();
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try out.writeAll("Hello microzig!\r\n");
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led.setToLow();
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micro.debug.busySleep(100_000);
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}
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}
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fn blinkError(led: anytype, err: micro.uart.InitError) void {
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var blinks: u3 =
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switch (err) {
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error.UnsupportedBaudRate => 1,
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error.UnsupportedParity => 2,
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error.UnsupportedStopBitCount => 3,
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error.UnsupportedWordSize => 4,
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};
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while (blinks > 0) : (blinks -= 1) {
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led.setToHigh();
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micro.debug.busySleep(1_000_000);
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led.setToLow();
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micro.debug.busySleep(1_000_000);
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}
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}
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