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
87 lines
2.3 KiB
Rust
87 lines
2.3 KiB
Rust
//! Demonstrates generating pulse sequences with RMT
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//! Connect a logic analyzer to GPIO4 to see the generated pulses.
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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_time::{Duration, Timer};
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use esp32_hal::{
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clock::ClockControl,
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embassy::{self, executor::Executor},
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peripherals::Peripherals,
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prelude::*,
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rmt::{asynch::TxChannelAsync, Channel0, PulseCode, TxChannelConfig, TxChannelCreator},
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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 static_cell::make_static;
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#[embassy_executor::task]
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async fn rmt_task(mut channel: Channel0<0>) {
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let mut data = [PulseCode {
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level1: true,
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length1: 200,
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level2: false,
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length2: 50,
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}; 20];
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data[data.len() - 2] = PulseCode {
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level1: true,
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length1: 3000,
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level2: false,
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length2: 500,
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};
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data[data.len() - 1] = PulseCode::default();
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loop {
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esp_println::println!("transmit");
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channel.transmit(&data).await.unwrap();
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esp_println::println!("transmitted\n");
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Timer::after(Duration::from_millis(500)).await;
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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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esp_println::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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#[cfg(feature = "embassy-time-timg0")]
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{
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let timer_group0 = esp32_hal::timer::TimerGroup::new(peripherals.TIMG0, &clocks);
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embassy::init(&clocks, timer_group0.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, 80u32.MHz(), &clocks).unwrap();
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let channel = rmt
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.channel0
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.configure(
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io.pins.gpio4.into_push_pull_output(),
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TxChannelConfig {
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clk_divider: 255,
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..TxChannelConfig::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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esp32_hal::interrupt::enable(
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esp32_hal::peripherals::Interrupt::RMT,
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esp32_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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