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c631049efc
closes #32 closes #33
61 lines
1.2 KiB
Rust
61 lines
1.2 KiB
Rust
//! examples/task.rs
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#![deny(unsafe_code)]
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#![deny(warnings)]
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#![no_main]
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#![no_std]
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extern crate panic_semihosting;
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use cortex_m_semihosting::debug;
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use rtfm::app;
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macro_rules! println {
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($($tt:tt)*) => {
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if let Ok(mut stdout) = cortex_m_semihosting::hio::hstdout() {
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use core::fmt::Write;
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writeln!(stdout, $($tt)*).ok();
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}
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};
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}
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#[app(device = lm3s6965)]
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const APP: () = {
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#[init(spawn = [foo])]
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fn init() {
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spawn.foo().unwrap();
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}
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#[task(spawn = [bar, baz])]
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fn foo() {
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println!("foo");
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// spawns `bar` onto the task scheduler
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// `foo` and `bar` have the same priority so `bar` will not run until
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// after `foo` terminates
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spawn.bar().unwrap();
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// spawns `baz` onto the task scheduler
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// `baz` has higher priority than `foo` so it immediately preempts `foo`
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spawn.baz().unwrap();
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}
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#[task]
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fn bar() {
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println!("bar");
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debug::exit(debug::EXIT_SUCCESS);
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}
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#[task(priority = 2)]
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fn baz() {
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println!("baz");
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}
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// Interrupt handlers used to dispatch software tasks
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extern "C" {
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fn UART0();
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fn UART1();
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}
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};
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