Log defmt messages over the serial port.

Related tags

Utilities defmt-serial
Overview

Crates.io Documentation

defmt-serial

A defmt target for logging over a serial port. Messages can e.g. be read using socat and passed through defmt-print, see example-artemis for how to do that. You can also try it out in a hosted environment: example-std.

#[entry]
fn main() -> ! {
    let mut dp = hal::pac::Peripherals::take().unwrap();
    let pins = hal::gpio::Pins::new(dp.GPIO);

    // set up serial
    let mut serial = hal::uart::Uart0::new(dp.UART0, pins.tx0, pins.rx0);
    defmt_serial::defmt_serial(serial);

    defmt::info!("Hello from defmt!");

    loop {
        asm::wfi();
    }
}

Remember to set the DEFMT_LOG variable when testing, e.g.:

$ cd example-std/
$ DEFMT_LOG=debug cargo run

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Comments
  • Nothing sent out from defmt

    Nothing sent out from defmt

    Hi @gauteh

    Firstly, thanks for your great work!

    I've had a try with it on one of my STM32WLxx PoC projects. However, it seems like nothing has been committed to UART. Here are my attempts:

    • I've tried doing something like embedded_hal_serial_Write::write(&mut uart, 0x55) and I can see the 0x55 printed as ASCII character U in the serial monitor. Therefore I guess the peripheral setup and hardware wiring should be correct.
    • I've also tried defmt-rtt before and it works fine as well.
    • I've also tried using cortex-m-rt only instead of using RTIC. But that didn't work as well.

    Here's my repo: https://github.com/huming2207/lowu/tree/25c9075b1393456c0785ac18f295e49cd54ab79a

    Maybe I forgot to add in some initialization stuff?

    Regards, Jackson

    opened by huming2207 10
Owner
Gaute Hope
Gaute Hope
GitHub
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