56a7553b2d
* Remove uneeded usb generics * Ensure all structs are consistently CamelCased * changelog
95 lines
3.1 KiB
Rust
95 lines
3.1 KiB
Rust
//! RGB LED Demo
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//!
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//! This example drives an SK68XX RGB LED, which is connected to a pin on the
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//! official DevKits.
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//!
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//! The demo will leverage the [`smart_leds`](https://crates.io/crates/smart-leds)
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//! crate functionality to circle through the HSV hue color space (with
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//! saturation and value both at 255). Additionally, we apply a gamma correction
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//! and limit the brightness to 10 (out of 255).
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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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clock::ClockControl,
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delay::Delay,
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gpio::Io,
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peripherals::Peripherals,
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prelude::*,
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rmt::Rmt,
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};
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use esp_hal_smartled::{smartLedBuffer, SmartLedsAdapter};
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use smart_leds::{
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brightness,
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gamma,
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hsv::{hsv2rgb, Hsv},
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SmartLedsWrite,
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};
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#[entry]
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fn main() -> ! {
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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 io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
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// Each devkit uses a unique GPIO for the RGB LED, so in order to support
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// all chips we must unfortunately use `#[cfg]`s:
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cfg_if::cfg_if! {
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if #[cfg(feature = "esp32")] {
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let led_pin = io.pins.gpio33;
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} else if #[cfg(feature = "esp32c3")] {
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let led_pin = io.pins.gpio8;
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} else if #[cfg(any(feature = "esp32c6", feature = "esp32h2"))] {
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let led_pin = io.pins.gpio8;
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} else if #[cfg(feature = "esp32s2")] {
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let led_pin = io.pins.gpio18;
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} else if #[cfg(feature = "esp32s3")] {
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let led_pin = io.pins.gpio48;
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}
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}
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// Configure RMT peripheral globally
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#[cfg(not(feature = "esp32h2"))]
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let rmt = Rmt::new(peripherals.RMT, 80.MHz(), &clocks, None).unwrap();
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#[cfg(feature = "esp32h2")]
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let rmt = Rmt::new(peripherals.RMT, 32.MHz(), &clocks, None).unwrap();
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// We use one of the RMT channels to instantiate a `SmartLedsAdapter` which can
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// be used directly with all `smart_led` implementations
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let rmt_buffer = smartLedBuffer!(1);
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let mut led = SmartLedsAdapter::new(rmt.channel0, led_pin, rmt_buffer, &clocks);
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// Initialize the Delay peripheral, and use it to toggle the LED state in a
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// loop.
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let delay = Delay::new(&clocks);
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let mut color = Hsv {
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hue: 0,
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sat: 255,
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val: 255,
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};
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let mut data;
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loop {
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// Iterate over the rainbow!
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for hue in 0..=255 {
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color.hue = hue;
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// Convert from the HSV color space (where we can easily transition from one
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// color to the other) to the RGB color space that we can then send to the LED
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data = [hsv2rgb(color)];
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// When sending to the LED, we do a gamma correction first (see smart_leds
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// documentation for details) and then limit the brightness to 10 out of 255 so
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// that the output it's not too bright.
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led.write(brightness(gamma(data.iter().cloned()), 10))
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.unwrap();
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delay.delay_millis(20);
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}
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}
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}
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