const std = @import("std");
const microzig = @import("microzig");

const rp2040 = microzig.hal;
const i2c = rp2040.i2c;
const gpio = rp2040.gpio;
const peripherals = microzig.chip.peripherals;

pub const std_options = struct {
    pub const log_level = .info;
    pub const logFn = rp2040.uart.log;
};

const uart = rp2040.uart.num(0);
const i2c0 = i2c.num(0);

pub fn main() !void {
    uart.apply(.{
        .baud_rate = 115200,
        .tx_pin = gpio.num(0),
        .rx_pin = gpio.num(1),
        .clock_config = rp2040.clock_config,
    });
    rp2040.uart.init_logger(uart);

    _ = i2c0.apply(.{
        .clock_config = rp2040.clock_config,
        .scl_pin = gpio.num(4),
        .sda_pin = gpio.num(5),
    });

    for (0..std.math.maxInt(u7)) |addr| {
        const a: i2c.Address = @enumFromInt(addr);

        // Skip over any reserved addresses.
        if (a.is_reserved()) continue;

        var rx_data: [1]u8 = undefined;
        _ = i2c0.read_blocking(a, &rx_data) catch continue;

        std.log.info("I2C device found at address {X}.", .{addr});
    }
}