48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::rng::{self, Rng};
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use embassy_stm32::time::Hertz;
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use embassy_stm32::{bind_interrupts, peripherals};
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use {defmt_rtt as _, panic_probe as _};
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bind_interrupts!(struct Irqs{
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RNG => rng::InterruptHandler<peripherals::RNG>;
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});
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let mut config = embassy_stm32::Config::default();
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{
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use embassy_stm32::rcc::*;
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config.rcc.hse = Some(Hse {
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freq: Hertz(32_000_000),
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mode: HseMode::Bypass,
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prescaler: HsePrescaler::DIV1,
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});
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config.rcc.mux = ClockSrc::PLL1_R;
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config.rcc.pll = Some(Pll {
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source: PllSource::HSE,
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prediv: PllPreDiv::DIV2,
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mul: PllMul::MUL6,
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divp: None,
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divq: Some(PllQDiv::DIV2), // PLL1_Q clock (32 / 2 * 6 / 2), used for RNG
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divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
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});
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}
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let p = embassy_stm32::init(config);
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info!("Hello World!");
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let mut rng = Rng::new(p.RNG, Irqs);
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let mut buf = [0u8; 16];
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unwrap!(rng.async_fill_bytes(&mut buf).await);
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info!("random bytes: {:02x}", buf);
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loop {}
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}
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