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//! examples/generics.rs
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
#![no_std]
use cortex_m_semihosting::{debug, hprintln};
use lm3s6965::Interrupt;
use panic_semihosting as _;
use rtfm::{Exclusive, Mutex};
#[rtfm::app(device = lm3s6965)]
const APP: () = {
static mut SHARED: u32 = 0;
#[init]
fn init(_: init::Context) {
rtfm::pend(Interrupt::UART0);
rtfm::pend(Interrupt::UART1);
}
#[task(binds = UART0, resources = [SHARED])]
fn uart0(c: uart0::Context) {
static mut STATE: u32 = 0;
hprintln!("UART0(STATE = {})", *STATE).unwrap();
advance(STATE, c.resources.SHARED);
rtfm::pend(Interrupt::UART1);
debug::exit(debug::EXIT_SUCCESS);
}
#[task(binds = UART1, priority = 2, resources = [SHARED])]
fn uart1(c: uart1::Context) {
static mut STATE: u32 = 0;
hprintln!("UART1(STATE = {})", *STATE).unwrap();
// just to show that `SHARED` can be accessed directly
*c.resources.SHARED += 0;
advance(STATE, Exclusive(c.resources.SHARED));
}
};
fn advance(state: &mut u32, mut shared: impl Mutex<T = u32>) {
*state += 1;
let (old, new) = shared.lock(|shared| {
let old = *shared;
*shared += *state;
(old, *shared)
});
hprintln!("SHARED: {} -> {}", old, new).unwrap();
}
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