Module cortex_m_quickstart::examples::_5_device

Using a device crate

Crates generated using svd2rust are referred to as device crates. These crates provides an API to access the peripherals of a device. When you depend on one of these crates and the "rt" feature is enabled you don't need link to the cortex-m-rt crate.

Device crates also provide an interrupt! macro to register interrupt handlers.

This example depends on the stm32f103xx crate so you'll have to add it to your Cargo.toml.

$ edit Cargo.toml && cat $_
[dependencies.stm32f103xx]
features = ["rt"]
version = "0.7.0"

---

#![no_std]
 
extern crate cortex_m;
#[macro_use(exception, interrupt)]
extern crate stm32f103xx;
 
use cortex_m::interrupt;
 
fn main() {
    interrupt::free(|cs| {
        let _gpioa = stm32f103xx::GPIOA.borrow(cs);
        // do something with GPIOA
    });
}
 
exception!(SYS_TICK, tick, locals: {
    ticks: u32 = 0;
});
 
fn tick(l: &mut SYS_TICK::Locals) {
    l.ticks += 1;
    // ..
}
 
interrupt!(TIM2, tock, locals: {
    tocks: u32 = 0;
});
 
fn tock(l: &mut TIM2::Locals) {
    l.tocks += 1;
    // ..
}