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https://github.com/esp-rs/esp-hal.git
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248fb356f8
* Add the peripheral module plus some helper macros in preparation * peripheral macro * Add peripheral generation macro * Fixes after rebase * Update the signature of Peripherals::take * syncronise hello world example * fmt the entire repo Co-authored-by: Jesse Braham <jesse@beta7.io>
102 lines
3.0 KiB
Rust
102 lines
3.0 KiB
Rust
//! RGB LED Demo
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//!
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//! This example drives an SK68XX RGB LED that is connected to GPIO18.
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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 esp32s2_hal::{
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clock::ClockControl,
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peripherals::Peripherals,
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prelude::*,
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timer::TimerGroup,
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utils::{smartLedAdapter, SmartLedsAdapter},
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Delay,
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PulseControl,
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Rtc,
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IO,
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};
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#[allow(unused_imports)]
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use esp_backtrace 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_atomic_emulation_trap as _;
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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 peripherals = Peripherals::take();
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let mut system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let mut rtc = Rtc::new(peripherals.RTC_CNTL);
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut wdt = timer_group0.wdt;
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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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wdt.disable();
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rtc.rwdt.disable();
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// Configure RMT peripheral globally
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let pulse = PulseControl::new(peripherals.RMT, &mut system.peripheral_clock_control).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.gpio18);
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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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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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#[xtensa_lx_rt::exception]
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fn exception(
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cause: xtensa_lx_rt::exception::ExceptionCause,
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frame: xtensa_lx_rt::exception::Context,
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) {
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use esp_println::*;
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println!("\n\nException occured {:?} {:x?}", cause, frame);
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let backtrace = esp_backtrace::arch::backtrace();
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for b in backtrace.iter() {
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if let Some(addr) = b {
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println!("0x{:x}", addr)
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}
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}
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}
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