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//! Sends "Hello, world!" through the ITM port 0 //! //! **IMPORTANT** Not all Cortex-M chips support ITM. You'll have to connect the //! microcontroller's SWO pin to the SWD interface. Note that some development //! boards don't provide this option. //! //! ITM is much faster than semihosting. Like 4 orders of magnitude or so. //! //! You'll need [`itmdump`] to receive the message on the host plus you'll need //! to uncomment OpenOCD's ITM support in `.gdbinit`. //! //! [`itmdump`]: https://docs.rs/itm/0.1.1/itm/ //! //! ``` //! //! #![feature(used)] //! #![no_std] //! //! #[macro_use] //! extern crate cortex_m; //! extern crate cortex_m_rt; //! //! use cortex_m::{asm, interrupt, peripheral}; //! //! fn main() { //! interrupt::free( //! |cs| { //! let itm = peripheral::ITM.borrow(&cs); //! //! iprintln!(&itm.stim[0], "Hello, world!"); //! }, //! ); //! } //! //! // 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(); //! } //! ``` // Auto-generated. Do not modify.