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//! An application with one task
//!
//! ```
//!
//! #![deny(unsafe_code)]
//! #![feature(const_fn)]
//! #![feature(proc_macro)]
//! #![no_std]
//!
//! extern crate cortex_m;
//! #[macro_use(task)]
//! extern crate cortex_m_rtfm as rtfm;
//! extern crate stm32f103xx;
//!
//! use cortex_m::peripheral::SystClkSource;
//! use rtfm::{app, Threshold};
//!
//! app! {
//! device: stm32f103xx,
//!
//! // Here tasks are declared
//! //
//! // Each task corresponds to an interrupt or an exception. Every time the
//! // interrupt or exception becomes *pending* the corresponding task handler
//! // will be executed.
//! tasks: {
//! // Here we declare that we'll use the SYS_TICK exception as a task
//! SYS_TICK: {
//! // This is the priority of the task.
//! // 1 is the lowest priority a task can have.
//! // The maximum priority is determined by the number of priority bits
//! // the device has. This device has 4 priority bits so 16 is the
//! // maximum value.
//! priority: 1,
//!
//! // These are the *resources* associated with this task
//! //
//! // The peripherals that the task needs can be listed here
//! resources: [GPIOC],
//! },
//! }
//! }
//!
//! fn init(p: init::Peripherals) {
//! // power on GPIOC
//! p.RCC.apb2enr.modify(|_, w| w.iopcen().enabled());
//!
//! // configure PC13 as output
//! p.GPIOC.bsrr.write(|w| w.bs13().set());
//! p.GPIOC
//! .crh
//! .modify(|_, w| w.mode13().output().cnf13().push());
//!
//! // configure the system timer to generate one interrupt every second
//! p.SYST.set_clock_source(SystClkSource::Core);
//! p.SYST.set_reload(8_000_000); // 1s
//! p.SYST.enable_interrupt();
//! p.SYST.enable_counter();
//! }
//!
//! fn idle() -> ! {
//! loop {
//! rtfm::wfi();
//! }
//! }
//!
//! // This binds the `sys_tick` handler to the `SYS_TICK` task
//! //
//! // This particular handler has local state associated to it. The value of the
//! // `STATE` variable will be preserved across invocations of this handler
//! task!(SYS_TICK, sys_tick, Locals {
//! static STATE: bool = false;
//! });
//!
//! // This is the task handler of the SYS_TICK exception
//! //
//! // `t` is the preemption threshold token. We won't use it this time.
//! // `l` is the data local to this task. The type here must match the one declared
//! // in `task!`.
//! // `r` is the resources this task has access to. `SYS_TICK::Resources` has one
//! // field per resource declared in `app!`.
//! fn sys_tick(_t: &mut Threshold, l: &mut Locals, r: SYS_TICK::Resources) {
//! // toggle state
//! *l.STATE = !*l.STATE;
//!
//! if *l.STATE {
//! // set the pin PC13 high
//! r.GPIOC.bsrr.write(|w| w.bs13().set());
//! } else {
//! // set the pin PC13 low
//! r.GPIOC.bsrr.write(|w| w.br13().reset());
//! }
//! }
//! ```
// Auto-generated. Do not modify.
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