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db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
75 lines
2.4 KiB
Rust
75 lines
2.4 KiB
Rust
//! RGB LED Demo
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//!
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//! This example drives an 12-element RGB ring that is connected to GPIO33
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//!
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//! The LEDs in the ring are transitioning though the HSV color spectrum for
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//! - Saturation: 255
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//! - Hue: 0 - 255
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//! - Value: 255
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//!
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//! For the 12-element RGB ring to work, building the release version is going
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//! to be required.
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#![no_std]
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#![no_main]
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use esp32_hal::{clock::ClockControl, peripherals, prelude::*, rmt::Rmt, Delay, IO};
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use esp_backtrace as _;
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use esp_hal_smartled::{smartLedAdapter, 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::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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// Configure RMT peripheral globally
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let rmt = Rmt::new(peripherals.RMT, 80u32.MHz(), &clocks).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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// -> We need to use the macro `smartLedAdapter!` with the number of addressed
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// LEDs here to initialize the internal LED pulse buffer to the correct
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// size!
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let mut led = <smartLedAdapter!(0, 12)>::new(rmt.channel0, io.pins.gpio33);
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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(&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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let rgb_color = hsv2rgb(color);
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// Assign new color to all 12 LEDs
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data = [rgb_color; 12];
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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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