447411fb58
* Rework hal initialization * Turn sw interrupt control into a virtual peripheral * Return a tuple instead of a named struct * Fix docs * Remove SystemClockControl * Move software interrupts under interrupt * Re-document what's left in system * Update time docs * Update sw int docs * Introduce Config * Fix tests * Remove redundant inits * Doc * Clean up examples&tests * Update tests * Add changelog entry * Start migration guide * Restore some convenience-imports * Remove Config from prelude
67 lines
1.5 KiB
Rust
67 lines
1.5 KiB
Rust
//! Demonstrates generating pulse sequences with RMT
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//!
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//! Connect a logic analyzer to GPIO4 to see the generated pulses.
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//!
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//! The following wiring is assumed:
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//! - generated pulses => GPIO4
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//% CHIPS: esp32 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
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#![no_std]
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#![no_main]
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use esp_backtrace as _;
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use esp_hal::{
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delay::Delay,
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gpio::Io,
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prelude::*,
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rmt::{PulseCode, Rmt, TxChannel, TxChannelConfig, TxChannelCreator},
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};
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#[entry]
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fn main() -> ! {
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let (peripherals, clocks) = esp_hal::init(esp_hal::Config::default());
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let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
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cfg_if::cfg_if! {
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if #[cfg(feature = "esp32h2")] {
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let freq = 32.MHz();
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} else {
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let freq = 80.MHz();
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}
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};
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let rmt = Rmt::new(peripherals.RMT, freq, &clocks).unwrap();
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let tx_config = TxChannelConfig {
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clk_divider: 255,
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..TxChannelConfig::default()
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};
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let mut channel = rmt.channel0.configure(io.pins.gpio4, tx_config).unwrap();
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let delay = Delay::new(&clocks);
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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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let transaction = channel.transmit(&data);
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channel = transaction.wait().unwrap();
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delay.delay_millis(500);
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}
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}
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