#![deny(warnings)]
#![no_main]
#![no_std]
use cortex_m_rt::entry;
use stm32h7xx_hal::{pac, prelude::*};
#[macro_use]
mod utilities;
use log::info;
#[entry]
fn main() -> ! {
utilities::logger::init();
let cp = cortex_m::Peripherals::take().unwrap();
let dp = pac::Peripherals::take().expect("cannot take peripherals");
info!("Setup PWR... ");
let pwr = dp.PWR.constrain();
let pwrcfg = example_power!(pwr).freeze();
info!("Setup RCC... ");
let rcc = dp.RCC.constrain();
let ccdr = rcc.sys_ck(100.MHz()).freeze(pwrcfg, &dp.SYSCFG);
info!("");
info!("stm32h7xx-hal example - Random Blinky");
info!("");
let gpioe = dp.GPIOE.split(ccdr.peripheral.GPIOE);
let mut led = gpioe.pe1.into_push_pull_output();
let mut delay = cp.SYST.delay(ccdr.clocks);
let mut rng = dp.RNG.constrain(ccdr.peripheral.RNG, &ccdr.clocks);
let mut random_bytes = [0u16; 3];
match rng.fill(&mut random_bytes) {
Ok(()) => info!("random bytes: {:?}", random_bytes),
Err(err) => info!("RNG error: {:?}", err),
}
loop {
let random_element: Result<u32, _> = rng.gen();
match random_element {
Ok(random) => {
let period = random % 200_u32;
led.toggle();
delay.delay_ms(period);
}
Err(err) => info!("RNG error: {:?}", err),
}
}
}