rtic/examples/periodic-payload.rs

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// # Pointers (old)
//
// ~52~ 48 bytes .bss
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//
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// # -Os
//
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// init
// a(bl=8000000, now=8000180, input=0)
// a(bl=16000000, now=16000180, input=1)
// a(bl=24000000, now=24000180, input=2)
//
// # -O3
//
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// init
// a(bl=8000000, now=8000168, input=0)
// a(bl=16000000, now=16000168, input=1)
// a(bl=24000000, now=24000168, input=2)
//
// # Indices (new)
//
// 32 bytes .bss
//
// ## -O3
//
// init
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// a(bl=8000000, now=8000172, input=0)
// a(bl=16000000, now=16000172, input=1)
//
// ## -Os
//
// init
// a(bl=8000000, now=8000179, input=0)
// a(bl=16000000, now=16000179, input=1)
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#![deny(unsafe_code)]
#![deny(warnings)]
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#![feature(proc_macro)]
#![no_std]
#[macro_use]
extern crate cortex_m;
extern crate cortex_m_rtfm as rtfm;
extern crate panic_abort;
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extern crate stm32f103xx;
use cortex_m::asm;
use cortex_m::peripheral::{DWT, ITM};
use rtfm::app;
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app! {
device: stm32f103xx,
resources: {
static ITM: ITM;
},
init: {
async_after: [a],
},
free_interrupts: [EXTI0],
tasks: {
a: {
async_after: [a],
input: u16,
resources: [ITM],
},
},
}
const MS: u32 = 8_000;
const S: u32 = 1_000 * MS;
#[inline(always)]
fn init(mut ctxt: init::Context) -> init::LateResources {
iprintln!(&mut ctxt.core.ITM.stim[0], "init");
ctxt.async.a.post(&mut ctxt.threshold, 1 * S, 0).ok();
init::LateResources { ITM: ctxt.core.ITM }
}
#[inline(always)]
fn idle(_ctxt: idle::Context) -> ! {
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loop {
asm::wfi();
}
}
fn a(mut ctxt: a::Context) {
let now = DWT::get_cycle_count();
let input = ctxt.input;
let bl = ctxt.baseline;
let itm = ctxt.resources.ITM;
iprintln!(
&mut itm.stim[0],
"a(bl={}, now={}, input={})",
bl,
now,
input
);
ctxt.async
.a
.post(&mut ctxt.threshold, 1 * S, input + 1)
.ok();
}