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a55c9d77ec
- Add RMT output channel support for ESP32, ESP32-S2, ESP32-S3, ESP32-C3 - Add add RMT adapter for `smart-leds` crate - Add example `hello_rgb` for ESP32-S2, ESP32-S3 and ESP32-C3 that either drives one LED at the pin where a LED is located on the official devkits - Add example `hello_rgb` for ESP32 that is driving a 12-element RGB ring.
89 lines
2.5 KiB
Rust
89 lines
2.5 KiB
Rust
//! RGB LED Demo
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//!
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//! This example drives an SK68XX RGB LED that is connected to the GPI48 pin.
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//! A RGB LED is connected to that pin on the 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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#![no_std]
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#![no_main]
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use esp32s3_hal::{
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pac,
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prelude::*,
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pulse_control::ClockSource,
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utils::{smartLedAdapter, SmartLedsAdapter},
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Delay,
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PulseControl,
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RtcCntl,
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Timer,
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IO,
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};
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#[allow(unused_imports)]
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use panic_halt as _;
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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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use xtensa_lx_rt::entry;
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#[entry]
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fn main() -> ! {
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let mut peripherals = pac::Peripherals::take().unwrap();
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let mut rtc_cntl = RtcCntl::new(peripherals.RTC_CNTL);
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let mut timer0 = Timer::new(peripherals.TIMG0);
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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// Disable MWDT and RWDT (Watchdog) flash boot protection
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timer0.disable();
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rtc_cntl.set_wdt_global_enable(false);
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// Configure RMT peripheral globally
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let pulse = PulseControl::new(
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peripherals.RMT,
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&mut peripherals.SYSTEM,
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ClockSource::APB,
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0,
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0,
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0,
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)
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.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 mut led = <smartLedAdapter!(1)>::new(pulse.channel0, io.pins.gpio48);
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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 mut delay = Delay::new();
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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_ms(20u8);
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}
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}
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}
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