d5d8897c84
Unsafe is not required here given that all futures are required to live longer than their global peripheral instances. There are other occurrences of unsafe being used on new that should be removed. I started to do that but then went down a bit of a rabbit hole.
41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
#![no_std]
|
|
#![no_main]
|
|
#![feature(type_alias_impl_trait)]
|
|
|
|
#[path = "../example_common.rs"]
|
|
mod example_common;
|
|
|
|
use defmt::unwrap;
|
|
use embassy::executor::Spawner;
|
|
use embassy::traits::rng::Rng as _;
|
|
use embassy_nrf::interrupt;
|
|
use embassy_nrf::rng::Rng;
|
|
use embassy_nrf::Peripherals;
|
|
use rand::Rng as _;
|
|
|
|
#[embassy::main]
|
|
async fn main(_spawner: Spawner, p: Peripherals) {
|
|
let mut rng = Rng::new(p.RNG, interrupt::take!(RNG));
|
|
|
|
// Async API
|
|
let mut bytes = [0; 4];
|
|
unwrap!(rng.fill_bytes(&mut bytes).await); // nRF RNG is infallible
|
|
defmt::info!("Some random bytes: {:?}", bytes);
|
|
|
|
// Sync API with `rand`
|
|
defmt::info!("A random number from 1 to 10: {:?}", rng.gen_range(1..=10));
|
|
|
|
let mut bytes = [0; 1024];
|
|
unwrap!(rng.fill_bytes(&mut bytes).await);
|
|
let zero_count: u32 = bytes.iter().fold(0, |acc, val| acc + val.count_zeros());
|
|
let one_count: u32 = bytes.iter().fold(0, |acc, val| acc + val.count_ones());
|
|
defmt::info!(
|
|
"Chance of zero: {}%",
|
|
zero_count * 100 / (bytes.len() as u32 * 8)
|
|
);
|
|
defmt::info!(
|
|
"Chance of one: {}%",
|
|
one_count * 100 / (bytes.len() as u32 * 8)
|
|
);
|
|
}
|