/*
 * any key firmware
 * Copyright (C) 2020  Luca Schmid

 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#![no_std]
#![no_main]

use cortex_m_rt::entry;
use panic_halt as _;
use stm32f0xx_hal::pac::Peripherals;
use stm32f0xx_hal::prelude::*;

#[entry]
fn main() -> ! {
    let mut p = Peripherals::take().unwrap();

    let mut rcc = p.RCC.configure().freeze(&mut p.FLASH);

    let gpioa = p.GPIOA.split(&mut rcc);
    let gpiob = p.GPIOB.split(&mut rcc);

    let (mut led1_b, mut led1_g, mut led1_r, mut led2_g, mut led2_r, mut led2_b) = cortex_m::interrupt::free(|cs| (
        gpioa.pa0.into_push_pull_output(cs),
        gpioa.pa1.into_push_pull_output(cs),
        gpioa.pa2.into_push_pull_output(cs),
        gpiob.pb0.into_push_pull_output(cs),
        gpiob.pb1.into_push_pull_output(cs),
        gpiob.pb5.into_push_pull_output(cs),
    ));
    led1_r.set_high().ok(); //   0
    led1_g.set_high().ok(); //   0
    led1_b.set_low().ok();  // 255
    // ^ blue
    led2_r.set_high().ok(); //   0
    led2_g.set_low().ok();  // 255
    led2_b.set_low().ok();  // 255
    // ^ cyan

    loop {
        cortex_m::asm::nop();
    }
}