//! Prints "Hello, world!" on the OpenOCD console using semihosting
//!
//! ---

#![no_main]
#![no_std]

extern crate cortex_m;
#[macro_use]
extern crate cortex_m_rt as rt;
extern crate cortex_m_semihosting as sh;
extern crate panic_abort; // panicking behavior

use core::fmt::Write;

use cortex_m::asm;
use rt::ExceptionFrame;
use sh::hio;

main!(main);

fn main() -> ! {
    let mut stdout = hio::hstdout().unwrap();
    writeln!(stdout, "Hello, world!").unwrap();

    loop {}
}

exception!(DefaultHandler, dh);

#[inline(always)]
fn dh(_nr: u8) {
    asm::bkpt();
}

exception!(HardFault, hf);

#[inline(always)]
fn hf(_ef: &ExceptionFrame) -> ! {
    asm::bkpt();

    loop {}
}

// As we are not using interrupts, we just bind them all to the `DefaultHandler` exception handler
interrupts!(DefaultHandler);