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Update RNG example

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This commit is contained in:
Liam Murphy 2021-06-30 12:55:30 +10:00
parent 89fdad3a6b
commit a64dec517c
1 changed files with 17 additions and 4 deletions
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21
examples/nrf/src/bin/rng.rs
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@ -10,15 +10,15 @@ mod example_common;
use defmt::panic; use defmt::panic;
use embassy::executor::Spawner; use embassy::executor::Spawner;
use embassy_nrf::Peripherals;
use embassy_nrf::rng::Rng;
use embassy_nrf::interrupt;
use embassy::traits::rng::Rng as _; use embassy::traits::rng::Rng as _;
use embassy_nrf::interrupt;
use embassy_nrf::rng::Rng;
use embassy_nrf::Peripherals;
use rand::Rng as _; use rand::Rng as _;
#[embassy::main] #[embassy::main]
async fn main(_spawner: Spawner, p: Peripherals) { async fn main(_spawner: Spawner, p: Peripherals) {
let mut rng = Rng::new(p.RNG, interrupt::take!(RNG)); let mut rng = unsafe { Rng::new(p.RNG, interrupt::take!(RNG)) };
// Async API // Async API
let mut bytes = [0; 4]; let mut bytes = [0; 4];
@ -27,4 +27,17 @@ async fn main(_spawner: Spawner, p: Peripherals) {
// Sync API with `rand` // Sync API with `rand`
defmt::info!("A random number from 1 to 10: {:?}", rng.gen_range(1..=10)); defmt::info!("A random number from 1 to 10: {:?}", rng.gen_range(1..=10));
let mut bytes = [0; 1024];
rng.fill_bytes(&mut bytes).await.unwrap();
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)
);
} }