itm_logger

An implementation of the log facade that sends logging information over ITM stim port 0

License

This template is licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)

• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

lib.rs:

An implementation of the log facade that sends logging information over ITM stim port 0

Calls to logging macros optimize down to nothing if logging feature is not enabled.

Usage

use itm_logger::{
    logger_init,
    update_tpiu_baudrate,
    log,
    info,
    error,
    Level,
};

logger_init();
// if you change the CPU clock during boot up
let sysclk: Hertz = clocks.sysclk().into();
update_tpiu_baudrate(sysclk.0, ITM_BAUD_RATE).expect("Failed to reset TPIU baudrate");

perform-enabled-checks feature

Not enabled by default

Enabling this feature causes the logger to attempt to check if ITM is enabled before writing to it.

This should work on all cortex-m except M0. See is_debugger_attached documentation for more information.

Checks performed are:

• Debug is enabled (DCB::DHCSR::DEBUGEN)
• ITM is enabled (ITM::TCR::ITMENA)
• Stim port we're using is enabled (ITM::TER[PORT])