picow/src/main.rs

#![no_std]
#![no_main]

extern crate panic_halt;
use cyw43_pio::PioSpi;
use embassy_executor::Spawner;
use embassy_rp::{
    bind_interrupts,
    gpio::{Level, Output},
    peripherals::{DMA_CH0, PIO0, USB},
    pio::{self, Pio},
    usb::{self, Driver},
};
use embassy_time::Timer;
use log::info;
use static_cell::StaticCell;

// bind interrupt request to handler
bind_interrupts!(struct Irqs {
    PIO0_IRQ_0 => pio::InterruptHandler<PIO0>;
    USBCTRL_IRQ => usb::InterruptHandler<USB>;
});

// logger task
#[embassy_executor::task]
async fn logger_task(driver: Driver<'static, USB>) {
    embassy_usb_logger::run!(1024, log::LevelFilter::Info, driver);
}

// wireless task
#[embassy_executor::task]
async fn cyw43_task(
    runner: cyw43::Runner<'static, Output<'static>, PioSpi<'static, PIO0, 0, DMA_CH0>>,
) -> ! {
    runner.run().await
}

#[embassy_executor::main]
async fn main(spawner: Spawner) {
    // hardware abstraction layer
    let hal = embassy_rp::init(Default::default());

    // usb driver
    let driver = Driver::new(hal.USB, Irqs);

    // spawn logger task
    spawner.spawn(logger_task(driver)).unwrap();

    // wireless firmware binary
    let fw = include_bytes!("../firmware/43439A0.bin");

    // wireless country locale matrix
    let clm = include_bytes!("../firmware/43439A0_clm.bin");

    // wireless power on signal
    let pwr = Output::new(hal.PIN_23, Level::Low);

    // wireless serial peripheral interface chip select
    let cs = Output::new(hal.PIN_25, Level::High);

    // programmed input/output
    let mut pio = Pio::new(hal.PIO0, Irqs);

    // programmed serial peripheral interface
    let spi = PioSpi::new(
        &mut pio.common,
        pio.sm0,
        pio.irq0,
        cs,
        hal.PIN_24,
        hal.PIN_29,
        hal.DMA_CH0,
    );

    // wireless driver state
    static STATE: StaticCell<cyw43::State> = StaticCell::new();
    let state = STATE.init(cyw43::State::new());

    // spawn wireless task
    let (_, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
    spawner.spawn(cyw43_task(runner)).unwrap();

    // initialize wireless
    control.init(clm).await;
    control
        .set_power_management(cyw43::PowerManagementMode::PowerSave)
        .await;

    // time to blink
    let mut led = false;
    loop {
        led = !led;
        info!("LED: {}", led);
        control.gpio_set(0, led).await;
        Timer::after_secs(1).await;
    }
}