* > if you aren't critical sectioning or similar.

for the bare metal app, I have to use a critical section to get the context for global pins that I toggle and clear in the interrupt, but that's it:

```rust
#[interrupt]
fn EXTI15_10() {
    // info!("EXTI15_10 fired!");
    cortex_m::interrupt::free(|cs| {
        if let Some(led) = LED.borrow(cs).borrow_mut().as_mut() {
            led.set_high();
            led.set_low();
        }
        if let Some(button) = BUTTON.borrow(cs).borrow_mut().as_mut() {
            button.clear_interrupt_pending_bit();
        }
    })
}
```