#![no_main]
#![no_std]

extern crate panic_semihosting;
// use cortex_m::iprintln;
use cortex_m_rt::entry;
// use cortex_m_semihosting::{dbg, hprintln};

use hal::prelude::*;
use lpc55_hal as hal;

#[entry]
fn main() -> ! {
    let hal = hal::new();
    let anactrl = hal.anactrl;
    let pmc = hal.pmc;
    let mut syscon = hal.syscon;
    // dbg!(syscon.get_num_wait_states());
    let mut gpio = hal.gpio.enabled(&mut syscon);
    let mut iocon = hal.iocon.enabled(&mut syscon);

    // let mut cp = hal::raw::CorePeripherals::take().unwrap();
    // let stim = &mut cp.ITM.stim[0];

    // dbg!(unsafe { &(*hal::raw::TPIU::ptr()) }.sppr.read() );
    // unsafe {      &(*hal::raw::TPIU::ptr())  .sppr.write(2) };
    // dbg!(unsafe { &(*hal::raw::TPIU::ptr()) }.sppr.read() );

    // UM kind of says it's not enabled, but it actually is
    // let iocon = iocon.enabled(&mut syscon);

    // R = pio1_6
    // G = pio1_7
    // B = pio1_4
    //
    // on = low, off = high

    let pins = hal::Pins::take().unwrap();
    let mut red = pins
        .pio1_6
        .into_gpio_pin(&mut iocon, &mut gpio)
        .into_output(hal::drivers::pins::Level::High); // start turned off

    let clocks = hal::ClockRequirements::default()
        .configure(&mut anactrl, &mut pmc, &mut syscon)
        .unwrap();

    let token = clocks.support_utick_token().unwrap();

    let mut utick = hal.utick.enabled(&mut syscon, &token);

    let delay = hal::time::Ticks {
        value: 500_000,
        // clock: &clock,
    }; // 500 ms = 0.5 s

    let mut sleep = hal::time::Busy::wrap(&mut utick);

    loop {
        sleep.sleep(delay);
        red.set_low().unwrap();
        // iprintln!(stim, "led on");

        sleep.sleep(delay);
        red.set_high().unwrap();
        // iprintln!(stim, "led off");
    }
}