Module cortex_m_quickstart::examples::_2_panic [−] [src]

Redirecting panic! messages

The cortex-m-rt crate provides two options to redirect panic! messages through these two Cargo features:

  • panic-over-semihosting. panic! messages will be printed to the OpenOCD console using semihosting. This is slow.

  • panic-over-itm. panic! messages will be send through the ITM port 0. This is much faster but requires ITM support on the device.

If neither of these options is specified then the panic! message will be lost. Note that all panic!s will trigger a debugger breakpoint.

 
#![feature(used)]
#![no_std]
 
extern crate cortex_m;
extern crate cortex_m_rt;
 
use cortex_m::asm;
 
fn main() {
    panic!("Oops");
}
 
// As we are not using interrupts, we just register a dummy catch all handler
#[allow(dead_code)]
#[used]
#[link_section = ".rodata.interrupts"]
static INTERRUPTS: [extern "C" fn(); 240] = [default_handler; 240];
 
extern "C" fn default_handler() {
    asm::bkpt();
}