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https://github.com/esp-rs/esp-hal.git
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0064766ef2
* No longer publicly expose the `PeripheralClockControl` struct * Update examples as needed to get things building again * Update CHANGELOG.md * Address review feedback, fix a warning * Use a critical section for all devices other than the ESP32-C6/H2, as they modify multiple registers * Rebase and update `etm` driver to fix build errors
88 lines
2.3 KiB
Rust
88 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 esp32s2_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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use xtensa_atomic_emulation_trap as _;
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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 = esp32s2_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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esp32s2_hal::interrupt::enable(
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esp32s2_hal::peripherals::Interrupt::RMT,
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esp32s2_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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