96 lines
2.4 KiB
Rust
96 lines
2.4 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::Executor;
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use embassy_rp::gpio::{Level, Output};
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use embassy_rp::multicore::{spawn_core1, Stack};
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use embassy_rp::peripherals::PIN_25;
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use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
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use embassy_sync::channel::Channel;
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use static_cell::StaticCell;
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use {defmt_rtt as _, panic_probe as _};
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const BUF_SIZE: usize = 64;
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static mut CORE1_STACK: Stack<4096> = Stack::new();
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static EXECUTOR0: StaticCell<Executor> = StaticCell::new();
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static EXECUTOR1: StaticCell<Executor> = StaticCell::new();
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static CHANNEL: Channel<CriticalSectionRawMutex, Buffer, 1> = Channel::new();
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enum State {
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Happy,
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Sad,
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Relaxed,
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Surprised,
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Unknown,
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}
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#[derive(Clone)]
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struct Buffer([f32; BUF_SIZE]);
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impl Default for Buffer {
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fn default() -> Self {
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Buffer([0.0; BUF_SIZE])
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}
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}
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#[cortex_m_rt::entry]
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fn main() -> ! {
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let p = embassy_rp::init(Default::default());
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let led = Output::new(p.PIN_25, Level::Low);
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spawn_core1(p.CORE1, unsafe { &mut CORE1_STACK }, move || {
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let executor1 = EXECUTOR1.init(Executor::new());
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executor1.run(|spawner| unwrap!(spawner.spawn(core1_task(led))));
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});
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let executor0 = EXECUTOR0.init(Executor::new());
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executor0.run(|spawner| unwrap!(spawner.spawn(core0_task())));
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}
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#[embassy_executor::task]
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async fn core0_task() {
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use nanorand::{Rng, WyRand};
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let mut rng = WyRand::new();
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let mut buf = Buffer([0.0; BUF_SIZE]);
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let mut count = 0;
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info!("Hello from core 0");
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// Sample EEG data, then append it to buffer
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// When full, send buffer to be added to the queue
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loop {
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if count >= BUF_SIZE {
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CHANNEL.send(buf.clone()).await;
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count = 0;
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} else {
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buf.0[count] = rng.generate::<f32>();
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count += 1;
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}
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}
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}
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#[embassy_executor::task]
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async fn core1_task(mut led: Output<'static, PIN_25>) {
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use tinyvec::ArrayVec;
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let mut queue = ArrayVec::<[Buffer; 64]>::new();
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info!("Hello from core 1");
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loop {
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// Shouldn't block on waiting for message?
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// Need to test
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queue.push(CHANNEL.recv().await);
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process_data(&queue[0]).await;
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queue.remove(0);
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}
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}
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async fn process_data(buf: &Buffer) -> State {
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// Low-pass filter
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// FFT (w/ hanning window)
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info!("Running FFT...");
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return State::Unknown;
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}
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