42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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#![allow(incomplete_features)]
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#[path = "../example_common.rs"]
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mod example_common;
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use defmt::panic;
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use embassy::executor::Spawner;
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use embassy::traits::rng::Rng as _;
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use embassy_nrf::interrupt;
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use embassy_nrf::rng::Rng;
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use embassy_nrf::Peripherals;
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use rand::Rng as _;
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#[embassy::main]
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async fn main(_spawner: Spawner, p: Peripherals) {
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let mut rng = unsafe { Rng::new(p.RNG, interrupt::take!(RNG)) };
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// Async API
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let mut bytes = [0; 4];
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rng.fill_bytes(&mut bytes).await.unwrap(); // nRF RNG is infallible
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defmt::info!("Some random bytes: {:?}", bytes);
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// Sync API with `rand`
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defmt::info!("A random number from 1 to 10: {:?}", rng.gen_range(1..=10));
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let mut bytes = [0; 1024];
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rng.fill_bytes(&mut bytes).await.unwrap();
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let zero_count: u32 = bytes.iter().fold(0, |acc, val| acc + val.count_zeros());
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let one_count: u32 = bytes.iter().fold(0, |acc, val| acc + val.count_ones());
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defmt::info!(
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"Chance of zero: {}%",
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zero_count * 100 / (bytes.len() as u32 * 8)
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);
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defmt::info!(
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"Chance of one: {}%",
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one_count * 100 / (bytes.len() as u32 * 8)
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);
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}
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