defmt ("de format", short for "deferred formatting") is a highly efficient logging framework that targets resource-constrained devices, like microcontrollers.
For more details about the framework check the book at https://defmt.ferrous-systems.com.
This repository contains the following packages:
The minimum supported Rust version is 1.76 (or Ferrocene 24.05). defmt is tested against the latest stable Rust version and the MSRV.
Tests are run using cargo xtask -- although this is simply an alias (defined in .cargo/config.toml) for cargo run --package xtask --.
To see a list of options, see xtask/src/main.rs, or run:
For example, to run all the tests, run:
You will need qemu-system-arm installed and in your $PATH for some of the tests (e.g. test-snapshot).
defmt is part of the Knurling project, Ferrous Systems' effort at improving tooling used to develop for embedded systems.
If you think that our work is useful, consider sponsoring it via GitHub Sponsors.
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.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.
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