mirror of
https://github.com/esp-rs/esp-hal.git
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be184a552d
* CS impl * use CS Mutex in C3 examples * use CS Mutex in S2 examples * Update esp32 example * run fmt * Update S3 examples * Remove uses of unsafe where no longer required * use esp_backtrace in examples * fix import & fmt once more * Bump MSRV to 1.60.0 Co-authored-by: Jesse Braham <jesse@beta7.io>
81 lines
2.0 KiB
Rust
81 lines
2.0 KiB
Rust
//! GPIO interrupt
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//!
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//! This prints "Interrupt" when the boot button is pressed.
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//! It also blinks an LED like the blinky example.
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#![no_std]
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#![no_main]
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use core::cell::RefCell;
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use critical_section::Mutex;
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use esp32s2_hal::{
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clock::ClockControl,
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gpio::{Gpio0, IO},
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gpio_types::{Event, Input, Pin, PullDown},
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interrupt,
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macros::ram,
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pac::{self, Peripherals},
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prelude::*,
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timer::TimerGroup,
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Delay,
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Rtc,
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};
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use esp_backtrace as _;
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use xtensa_lx_rt::entry;
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static BUTTON: Mutex<RefCell<Option<Gpio0<Input<PullDown>>>>> = Mutex::new(RefCell::new(None));
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take().unwrap();
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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 timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut wdt = timer_group0.wdt;
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let mut rtc = Rtc::new(peripherals.RTC_CNTL);
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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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// Set GPIO15 as an output, and set its state high initially.
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let mut led = io.pins.gpio15.into_push_pull_output();
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let mut button = io.pins.gpio0.into_pull_down_input();
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button.listen(Event::FallingEdge);
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critical_section::with(|cs| BUTTON.borrow_ref_mut(cs).replace(button));
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interrupt::enable(pac::Interrupt::GPIO, interrupt::Priority::Priority2).unwrap();
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led.set_high().unwrap();
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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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loop {
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led.toggle().unwrap();
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delay.delay_ms(500u32);
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}
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}
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#[ram]
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#[interrupt]
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fn GPIO() {
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esp_println::println!(
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"GPIO Interrupt with priority {}",
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xtensa_lx::interrupt::get_level()
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);
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critical_section::with(|cs| {
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BUTTON
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.borrow_ref_mut(cs)
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.as_mut()
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.unwrap()
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.clear_interrupt()
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});
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}
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