embassy/examples/stm32wl/src/bin/random.rs
2022-12-04 09:38:57 +01:00

34 lines
774 B
Rust

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::pac;
use embassy_stm32::rng::Rng;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut config = embassy_stm32::Config::default();
config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
config.rcc.enable_lsi = true; //Needed for RNG to work
let p = embassy_stm32::init(config);
unsafe {
pac::RCC.ccipr().modify(|w| {
w.set_rngsel(0b01);
});
}
info!("Hello World!");
let mut rng = Rng::new(p.RNG);
let mut buf = [0u8; 16];
unwrap!(rng.async_fill_bytes(&mut buf).await);
info!("random bytes: {:02x}", buf);
loop {}
}