/not_working.rs Secret
Created
February 11, 2022 23:42
nrf52840 timer attempt
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#![no_main] | |
#![no_std] | |
use core::cell::RefCell; | |
use cortex_m::{interrupt::Mutex, peripheral::NVIC, prelude::_embedded_hal_timer_CountDown}; | |
use cortex_m_rt::entry; | |
use hal::{ | |
pac::{interrupt, Interrupt, Peripherals, TIMER0}, | |
timer::Periodic, | |
Timer, | |
}; | |
use nrf52840_hal as hal; | |
static TIMER: Mutex<RefCell<Option<Timer<TIMER0, Periodic>>>> = Mutex::new(RefCell::new(None)); | |
#[entry] | |
fn main() -> ! { | |
let periph = Peripherals::take().unwrap(); | |
unsafe { | |
NVIC::unmask(Interrupt::TIMER0); | |
} | |
let mut timer = Timer::periodic(periph.TIMER0); | |
timer.enable_interrupt(); | |
timer.start(2_000_000u32); | |
cortex_m::interrupt::free(move |cs| { | |
*TIMER.borrow(cs).borrow_mut() = Some(timer); | |
}); | |
loop {} | |
} | |
#[interrupt] | |
fn TIMER0() { | |
cortex_m::interrupt::free(move |cs| { | |
let mut timer_cell = TIMER.borrow(cs).borrow_mut(); | |
let timer = timer_cell.as_mut().unwrap(); | |
timer.event_compare_cc0().reset(); | |
}) | |
} | |
#[panic_handler] | |
fn panic(_: &core::panic::PanicInfo) -> ! { | |
loop { | |
cortex_m::asm::bkpt(); | |
} | |
} |
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