rtic/examples/shared-with-init.rs

//! `examples/shared-with-init.rs`

#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
#![no_std]

extern crate panic_halt;

use cortex_m_semihosting::debug;
use lm3s6965::Interrupt;
use rtfm::app;

pub struct MustBeSend;

#[app(device = lm3s6965)]
const APP: () = {
    static mut SHARED: Option<MustBeSend> = None;

    #[init(resources = [SHARED])]
    fn init(c: init::Context) {
        // this `message` will be sent to task `UART0`
        let message = MustBeSend;
        *c.resources.SHARED = Some(message);

        rtfm::pend(Interrupt::UART0);
    }

    #[interrupt(resources = [SHARED])]
    fn UART0(c: UART0::Context) {
        if let Some(message) = c.resources.SHARED.take() {
            // `message` has been received
            drop(message);

            debug::exit(debug::EXIT_SUCCESS);
        }
    }
};