34 lines
816 B
Rust
34 lines
816 B
Rust
//! Sends "Hello, world!" through the ITM port 0
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//!
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//! ITM is much faster than semihosting. Like 4 orders of magnitude or so.
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//!
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//! **NOTE** Cortex-M0 chips don't support ITM.
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//!
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//! You'll have to connect the microcontroller's SWO pin to the SWD interface. Note that some
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//! development boards don't provide this option.
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//!
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//! You'll need [`itmdump`] to receive the message on the host plus you'll need to uncomment two
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//! `monitor` commands in the `.gdbinit` file.
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//!
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//! [`itmdump`]: https://docs.rs/itm/0.2.1/itm/
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//!
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//! ---
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#![no_main]
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#![no_std]
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extern crate panic_halt;
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use cortex_m::{iprintln, Peripherals};
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use cortex_m_rt::entry;
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#[entry]
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fn main() -> ! {
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let mut p = Peripherals::take().unwrap();
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let stim = &mut p.ITM.stim[0];
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iprintln!(stim, "Hello, world!");
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loop {}
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}
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