embedded-trainings-2020/advanced/firmware/src/bin/resource-solution.rs

60 lines
1.5 KiB
Rust
Raw Normal View History

2020-06-09 09:52:27 +00:00
#![no_main]
#![no_std]
use cortex_m::asm;
use dk::peripheral::POWER;
2020-06-09 09:52:27 +00:00
use panic_log as _; // panic handler
#[rtic::app(device = dk)]
2020-06-09 09:52:27 +00:00
const APP: () = {
struct Resources {
power: POWER,
counter: usize, // <- new resource
2020-06-09 09:52:27 +00:00
}
#[init]
fn init(_cx: init::Context) -> init::LateResources {
let board = dk::init().unwrap();
let power = board.power;
2020-06-09 09:52:27 +00:00
power.intenset.write(|w| w.usbdetected().set_bit());
2020-06-09 09:52:27 +00:00
log::info!("USBDETECTED interrupt enabled");
2020-06-09 09:52:27 +00:00
init::LateResources {
power,
counter: 0, // <- initialize the new resource
}
}
2020-06-09 09:52:27 +00:00
#[idle]
fn main(_cx: main::Context) -> ! {
loop {
log::info!("idle: going to sleep");
asm::wfi();
log::info!("idle: woke up");
}
}
2020-06-09 09:52:27 +00:00
#[task(binds = POWER_CLOCK, resources = [power, counter])]
// ^^^^^^^ we want to access the resource from here
fn on_power_event(cx: on_power_event::Context) {
log::debug!("POWER event occurred");
let power = cx.resources.power;
let counter = cx.resources.counter;
*counter += 1;
let n = *counter;
log::info!(
"on_power_event: cable connected {} time{}",
n,
if n != 1 { "s" } else { "" }
);
2020-06-09 09:52:27 +00:00
// clear the interrupt flag; otherwise this task will run again after it returns
power.events_usbdetected.reset();
2020-06-09 09:52:27 +00:00
}
};