defmtdefmt ("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.
The git version of the defmt book can be viewed at https://defmt-next.ferrous-systems.com/.
The fastest way to get started with defmt is to use our [app-template] to set up a new Cortex-M embedded project.
To include defmt in your existing project, follow our [Application Setup guide].
defmt always compiles on the latest stable rust release. This is enforced by our CI building and testing against this version.
It still might work on older rust versions, but this isn't ensured.
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.