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https://github.com/esp-rs/esp-hal.git
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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
71 lines
1.8 KiB
Rust
71 lines
1.8 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::{borrow::BorrowMut, cell::RefCell};
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use critical_section::Mutex;
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use esp32_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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xtensa_lx,
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Delay,
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};
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use esp_backtrace as _;
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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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// 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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unsafe 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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.borrow_mut()
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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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