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//! Two tasks running at *different* priorities 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, Resource, Threshold};
//!
//! app! {
//! device: stm32f103xx,
//!
//! resources: {
//! static COUNTER: u64 = 0;
//! },
//!
//! tasks: {
//! // The `SYS_TICK` task has higher priority than `TIM2`
//! SYS_TICK: {
//! path: sys_tick,
//! priority: 2,
//! resources: [COUNTER],
//! },
//!
//! TIM2: {
//! path: tim2,
//! priority: 1,
//! resources: [COUNTER],
//! },
//! },
//! }
//!
//! fn init(_p: init::Peripherals, _r: init::Resources) {
//! // ..
//! }
//!
//! fn idle() -> ! {
//! loop {
//! rtfm::wfi();
//! }
//! }
//!
//! fn sys_tick(_t: &mut Threshold, mut r: SYS_TICK::Resources) {
//! // ..
//!
//! // This task can't be preempted by `tim2` so it has direct access to the
//! // resource data
//! *r.COUNTER += 1;
//!
//! // ..
//! }
//!
//! fn tim2(t: &mut Threshold, mut r: TIM2::Resources) {
//! // ..
//!
//! // As this task runs at lower priority it needs a critical section to
//! // prevent `sys_tick` from preempting it while it modifies this resource
//! // data. The critical section is required to prevent data races which can
//! // lead to undefined behavior.
//! r.COUNTER.claim_mut(t, |counter, _t| {
//! // `claim_mut` creates a critical section
//! *counter += 1;
//! });
//!
//! // ..
//! }
//! ```
// Auto-generated. Do not modify.
|
