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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
115 lines
2.9 KiB
Rust
115 lines
2.9 KiB
Rust
//! This shows how to use the SYSTIMER peripheral including interrupts.
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//! It's an additional timer besides the TIMG peripherals.
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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 esp32h2_hal::{
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clock::ClockControl,
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interrupt,
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interrupt::Priority,
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peripherals::{self, Peripherals},
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prelude::*,
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systimer::{Alarm, Periodic, SystemTimer, Target},
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Delay,
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};
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use esp_backtrace as _;
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use esp_println::println;
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static ALARM0: Mutex<RefCell<Option<Alarm<Periodic, 0>>>> = Mutex::new(RefCell::new(None));
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static ALARM1: Mutex<RefCell<Option<Alarm<Target, 1>>>> = Mutex::new(RefCell::new(None));
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static ALARM2: Mutex<RefCell<Option<Alarm<Target, 2>>>> = 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 syst = SystemTimer::new(peripherals.SYSTIMER);
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println!("SYSTIMER Current value = {}", SystemTimer::now());
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let alarm0 = syst.alarm0.into_periodic();
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alarm0.set_period(1u32.secs());
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alarm0.interrupt_clear();
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alarm0.enable_interrupt(true);
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let alarm1 = syst.alarm1;
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alarm1.set_target(SystemTimer::now() + (SystemTimer::TICKS_PER_SECOND * 2));
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alarm1.enable_interrupt(true);
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let alarm2 = syst.alarm2;
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alarm2.set_target(SystemTimer::now() + (SystemTimer::TICKS_PER_SECOND * 3));
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alarm2.enable_interrupt(true);
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critical_section::with(|cs| {
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ALARM0.borrow_ref_mut(cs).replace(alarm0);
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ALARM1.borrow_ref_mut(cs).replace(alarm1);
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ALARM2.borrow_ref_mut(cs).replace(alarm2);
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});
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interrupt::enable(
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peripherals::Interrupt::SYSTIMER_TARGET0,
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Priority::Priority1,
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)
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.unwrap();
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interrupt::enable(
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peripherals::Interrupt::SYSTIMER_TARGET1,
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Priority::Priority2,
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)
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.unwrap();
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interrupt::enable(
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peripherals::Interrupt::SYSTIMER_TARGET2,
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Priority::Priority2,
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)
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.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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delay.delay_ms(10000u32);
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}
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}
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#[interrupt]
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fn SYSTIMER_TARGET0() {
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println!("Interrupt lvl1 (alarm0)");
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critical_section::with(|cs| {
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ALARM0
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.borrow_ref_mut(cs)
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.as_mut()
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.unwrap()
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.interrupt_clear()
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});
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}
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#[interrupt]
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fn SYSTIMER_TARGET1() {
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println!("Interrupt lvl2 (alarm1)");
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critical_section::with(|cs| {
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ALARM1
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.borrow_ref_mut(cs)
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.as_mut()
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.unwrap()
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.interrupt_clear()
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});
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}
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#[interrupt]
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fn SYSTIMER_TARGET2() {
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println!("Interrupt lvl2 (alarm2)");
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critical_section::with(|cs| {
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ALARM2
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.borrow_ref_mut(cs)
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.as_mut()
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.unwrap()
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.interrupt_clear()
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});
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}
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