Module f3::examples::_01_itm

Sends "Hello, world!" through the first ITM stimulus port

To receive the message on the host you'll have to do three things:

You'll need to uncomment lines 8 and 15 of the .gdbinit file.

You'll also need to connect the SWO pin of the on-board SWD programmer to pin PB3 as shown here.

Finally, you'll need to run itmdump itm.fifo (mind the file paths) to receive the message. Read the documentation of the itm crate, which provides the itmdump tool, for details.

#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
#![no_std]
 
#[macro_use]
extern crate cortex_m;
extern crate f3;
extern crate panic_semihosting;
#[macro_use(entry, exception)]
extern crate cortex_m_rt as rt;
 
use cortex_m::asm;
use rt::ExceptionFrame;
 
entry!(main);
 
fn main() -> ! {
    let p = cortex_m::Peripherals::take().unwrap();
    let mut itm = p.ITM;
 
    iprintln!(&mut itm.stim[0], "Hello, world!");
 
    asm::bkpt();
 
    loop {}
}
 
exception!(HardFault, hard_fault);
 
fn hard_fault(ef: &ExceptionFrame) -> ! {
    panic!("{:#?}", ef);
}
 
exception!(*, default_handler);
 
fn default_handler(irqn: i16) {
    panic!("Unhandled exception (IRQn = {})", irqn);
}