| // #![feature(stdsimd)] |
| #![no_main] |
| #![no_std] |
| use core::fmt::Write; |
| use cortex_m::asm; |
| use cortex_m_rt::entry; |
| use cortex_m_semihosting as semihosting; |
| |
| //FIXME: This imports the provided #[panic_handler]. |
| #[allow(rust_2018_idioms)] |
| extern crate panic_halt; |
| |
| entry!(main); |
| |
| fn main() -> ! { |
| let x = 42; |
| |
| loop { |
| asm::nop(); |
| |
| // write something through semihosting interface |
| let mut hstdout = semihosting::hio::hstdout().unwrap(); |
| let _ = write!(hstdout, "x = {}\n", x); |
| |
| // exit from qemu |
| semihosting::debug::exit(semihosting::debug::EXIT_SUCCESS); |
| } |
| } |
