mirror of
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>
98 lines
2.4 KiB
Rust
98 lines
2.4 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::{Event, Gpio0, Input, PullDown, IO},
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interrupt,
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macros::ram,
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peripherals::{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_atomic_emulation_trap 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();
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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(peripherals::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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#[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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