db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
127 lines
3.3 KiB
Rust
127 lines
3.3 KiB
Rust
//! Demonstrates decoding pulse sequences with RMT
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//! This uses the boot button as input - press the button a couple of
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//! times to generate a pulse sequence and then wait for the idle timeout to see
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//! the recorded pulse sequence
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use embassy_executor::Executor;
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use esp32h2_hal::{
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clock::ClockControl,
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embassy::{self},
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peripherals::Peripherals,
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prelude::*,
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rmt::{asynch::RxChannelAsync, Channel2, PulseCode, RxChannelConfig, RxChannelCreator},
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Rmt,
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IO,
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};
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use esp_backtrace as _;
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use esp_println::{print, println};
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use static_cell::make_static;
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const WIDTH: usize = 80;
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#[embassy_executor::task]
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async fn rmt_task(mut channel: Channel2<2>) {
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let mut data = [PulseCode {
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level1: true,
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length1: 1,
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level2: false,
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length2: 1,
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}; 48];
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loop {
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println!("receive");
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channel.receive(&mut data).await.unwrap();
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println!("received");
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let mut total = 0usize;
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for entry in &data[..data.len()] {
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if entry.length1 == 0 {
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break;
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}
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total += entry.length1 as usize;
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if entry.length2 == 0 {
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break;
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}
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total += entry.length2 as usize;
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}
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for entry in &data[..data.len()] {
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if entry.length1 == 0 {
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break;
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}
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let count = WIDTH / (total / entry.length1 as usize);
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let c = if entry.level1 { '-' } else { '_' };
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for _ in 0..count + 1 {
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print!("{}", c);
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}
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if entry.length2 == 0 {
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break;
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}
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let count = WIDTH / (total / entry.length2 as usize);
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let c = if entry.level2 { '-' } else { '_' };
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for _ in 0..count + 1 {
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print!("{}", c);
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}
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}
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println!();
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}
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}
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#[entry]
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fn main() -> ! {
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esp_println::logger::init_logger_from_env();
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println!("Init!");
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let peripherals = Peripherals::take();
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let system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let mut clock_control = system.peripheral_clock_control;
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#[cfg(feature = "embassy-time-systick")]
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embassy::init(
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&clocks,
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esp32h2_hal::systimer::SystemTimer::new(peripherals.SYSTIMER),
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);
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#[cfg(feature = "embassy-time-timg0")]
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embassy::init(
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&clocks,
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esp32h2_hal::timer::TimerGroup::new(peripherals.TIMG0, &clocks, &mut clock_control).timer0,
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);
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let rmt = Rmt::new(peripherals.RMT, 8u32.MHz(), &mut clock_control, &clocks).unwrap();
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let channel = rmt
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.channel2
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.configure(
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io.pins.gpio9,
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RxChannelConfig {
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clk_divider: 255,
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idle_threshold: 10000,
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..RxChannelConfig::default()
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},
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)
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.unwrap();
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// you have to enable the interrupt for async to work
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esp32h2_hal::interrupt::enable(
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esp32h2_hal::peripherals::Interrupt::RMT,
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esp32h2_hal::interrupt::Priority::Priority1,
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)
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.unwrap();
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let executor = make_static!(Executor::new());
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executor.run(|spawner| {
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spawner.spawn(rmt_task(channel)).ok();
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});
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}
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