mirror of
https://github.com/esp-rs/esp-idf-hal.git
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2b6fe48fa0
* WIP: Initial tx rmt implementation * Rename Bulder to Config to line up with other mods * WIP Potential traits for a "pulses" mod in embedded-hal * WIP: Initial tx rmt implementation * Rename Bulder to Config to line up with other mods * WIP Potential traits for a "pulses" mod in embedded-hal * Copied example code from ledc fork. Semi-working example. * Rename level to pulse. dev-dep versions. * WIP RMT, Examples * WIP RMT Fix neopixel example * WIP RMT morse code work * WIP RMT fixed morse example * WIP RMT more config, docs. * WIP RMT fix compilation * WIP RMT Fix doc comment in example. * WIP RMT: notes on examples * WIP RMT Group up same level config items. * WIP RMT Change half_inserted to an Option * WIP RMT Don't need to return Result in clear() * WIP RMT Config refactor. Into for enum. * Result instead of Option in PulseTick * Don't use floats for ticks calcs * WIP Duration for ticks * Cleanups. * Moved Duration logic into PulseDuration. * Remove unused tick_hz field. * Cleanups. * WIP playing around with generics * Refactored out Vec storage out of Writer * WIP Heap and Stack implementations for data * WIP about to nuke tricky const code * Cleanups * Own PinState. start/start_blocking. * Wrap duty percent with range safety. * Use units::Hertz * Use Hertz in ticks_hz * Stop transmitting implementation * Fix morse example * rmt peripheral for channels (4 for now) * Small tweaks * Morse example to demo more functionality * WIP Fixes and testing functionality * Cleanups and notes * Assign devices to number of channels. Cleanups. * Sprinkled TODO's around for docs/fixes * Longer messages don't repeat so remove it for now * Rename data to signal because data is a too generic term * More docs * Don't mention receiving in description. * More docs * Rename `add` to `push` like Vec. More docs. * Rename `Writer` to `Transmit` to line up with rmt docs. * Accidentally had idle_level in carrier config. * More docs and cleanups. std compatibility. * Remove chip::HwChannel import because of a * import later. * Separate duration to ticks calc. Music example. * Added comment on example. * clippy: ok_or_else, Default. * fixes: mut self, allows/features, alloc, &Pulse. * only need feature alloc for the use warning. * rename Signal implementations * Alloc, morse example fix. * Didn't need that map. iter does the ref. * Clippy repairs. println! instead of info!
54 lines
2.1 KiB
Rust
54 lines
2.1 KiB
Rust
//! A simple example to change colours of a WS2812/NeoPixel compatible LED.
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//!
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//! It is set to pin 18 which some dev boards have connected to a compatible LED.
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//!
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//! This example demonstrates the use of [`FixedLengthSignal`][crate::rmt::FixedLengthSignal] which
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//! lives on the stack and requires a known length before creating it.
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//!
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//! There is a similar implementation in the esp-idf project:
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//! https://github.com/espressif/esp-idf/tree/20847eeb96/examples/peripherals/rmt/led_strip
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//!
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//! Datasheet (PDF) for a WS2812, which explains how the pulses are to be sent:
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//! https://cdn-shop.adafruit.com/datasheets/WS2812.pdf
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use core::time::Duration;
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use embedded_hal::delay::blocking::DelayUs;
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use esp_idf_hal::delay::Ets;
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use esp_idf_hal::peripherals::Peripherals;
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use esp_idf_hal::rmt::config::TransmitConfig;
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use esp_idf_hal::rmt::{FixedLengthSignal, PinState, Pulse, Transmit};
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fn main() -> anyhow::Result<()> {
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esp_idf_sys::link_patches();
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let peripherals = Peripherals::take().unwrap();
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let led = peripherals.pins.gpio18.into_output()?;
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let channel = peripherals.rmt.channel0;
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let config = TransmitConfig::new().clock_divider(1);
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let mut tx = Transmit::new(led, channel, &config)?;
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let rgbs = [0xff0000, 0xffff00, 0x00ffff, 0x00ff00, 0xa000ff];
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loop {
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for rgb in rgbs {
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let ticks_hz = tx.counter_clock()?;
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let t0h = Pulse::new_with_duration(ticks_hz, PinState::High, &ns(350))?;
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let t0l = Pulse::new_with_duration(ticks_hz, PinState::Low, &ns(800))?;
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let t1h = Pulse::new_with_duration(ticks_hz, PinState::High, &ns(700))?;
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let t1l = Pulse::new_with_duration(ticks_hz, PinState::Low, &ns(600))?;
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let mut signal = FixedLengthSignal::<24>::new();
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for i in 0..24 {
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let bit = 2_u32.pow(i) & rgb != 0;
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let (high_pulse, low_pulse) = if bit { (t1h, t1l) } else { (t0h, t0l) };
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signal.set(i as usize, &(high_pulse, low_pulse))?;
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}
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tx.start_blocking(&signal)?;
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Ets.delay_ms(1000)?;
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}
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}
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}
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fn ns(nanos: u64) -> Duration {
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Duration::from_nanos(nanos)
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}
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