#![no_main]
#![no_std]
extern crate cortex_m_rt;
extern crate panic_halt;
use cortex_m_rt::{entry, exception};
#[entry]
fn foo() -> ! {
loop {}
}
#[exception]
fn SysTick() {
static mut COUNT: u64 = 0;
if *COUNT % 2 == 0 {
*COUNT += 1;
} else {
*COUNT *= 2;
}
}
#[exception]
fn SVCall() {
// If this was allowed it would lead to a data race as `SVCall` could preempt `SysTick`
SysTick(); //~ ERROR cannot find function, tuple struct or tuple variant `SysTick` in this scope [E0425]
}