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//! A showcase of the `app!` macro syntax
#![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 CO_OWNED: u32 = 0;
static ON: bool = false;
static OWNED: bool = false;
static SHARED: bool = false;
},
init: {
// This is the path to the `init` function
//
// `init` doesn't necessarily has to be in the root of the crate
path: main::init,
},
idle: {
// This is a path to the `idle` function
//
// `idle` doesn't necessarily has to be in the root of the crate
path: main::idle,
resources: [OWNED, SHARED],
},
tasks: {
SYS_TICK: {
path: sys_tick,
// If omitted priority is assumed to be 1
// priority: 1,
resources: [CO_OWNED, ON, SHARED],
},
TIM2: {
// Tasks are enabled, between `init` and `idle`, by default but they
// can start disabled if `false` is specified here
enabled: false,
path: tim2,
priority: 1,
resources: [CO_OWNED],
},
},
}
mod main {
use rtfm::{self, Resource, Threshold};
pub fn init(_p: ::init::Peripherals, _r: ::init::Resources) {}
pub fn idle(t: &mut Threshold, mut r: ::idle::Resources) -> ! {
loop {
*r.OWNED != *r.OWNED;
if *r.OWNED {
if r.SHARED.claim(t, |shared, _| **shared) {
rtfm::wfi();
}
} else {
r.SHARED.claim_mut(t, |shared, _| **shared = !**shared);
}
}
}
}
fn sys_tick(_t: &mut Threshold, r: SYS_TICK::Resources) {
**r.ON = !**r.ON;
**r.CO_OWNED += 1;
}
fn tim2(_t: &mut Threshold, r: TIM2::Resources) {
**r.CO_OWNED += 1;
}
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