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//! Two tasks running at the *same* priority with access to the same resource
#![deny(unsafe_code)]
#![deny(warnings)]
#![feature(proc_macro)]
#![no_std]
extern crate cortex_m_rtfm as rtfm;
extern crate stm32f103xx;
use rtfm::{app, Threshold};
app! {
device: stm32f103xx,
resources: {
static COUNTER: u64 = 0;
},
// Both SYS_TICK and TIM2 have access to the `COUNTER` data
tasks: {
SYS_TICK: {
path: sys_tick,
resources: [COUNTER],
},
TIM2: {
path: tim2,
resources: [COUNTER],
},
},
}
fn init(_p: init::Peripherals, _r: init::Resources) {
// ..
}
fn idle() -> ! {
loop {
rtfm::wfi();
}
}
// As both tasks are running at the same priority one can't preempt the other.
// Thus both tasks have direct access to the resource
fn sys_tick(_t: &mut Threshold, mut r: SYS_TICK::Resources) {
// ..
*r.COUNTER += 1;
// ..
}
fn tim2(_t: &mut Threshold, mut r: TIM2::Resources) {
// ..
*r.COUNTER += 1;
// ..
}
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