Crate defmt

A highly efficient logging framework that targets resource-constrained devices, like microcontrollers.

Check out the defmt book at https://defmt.ferrous-systems.com for more information about how to use it.

Compatibility

The defmt wire format might change between major versions. Attempting to read a defmt stream with an incompatible version will result in an error. This means that you have to update both the host and target side if a breaking change in defmt is released.

Macros

assert	Just like the core::assert! macro but defmt is used to log the panic message
assert_eq	Just like the core::assert_eq! macro but defmt is used to log the panic message
assert_ne	Just like the core::assert_ne! macro but defmt is used to log the panic message
dbg	Just like the std::dbg! macro but defmt is used to log the message at TRACE level.
debug	Logs data at debug level.
debug_assert	Just like the core::debug_assert! macro but defmt is used to log the panic message
debug_assert_eq	Just like the core::debug_assert_eq! macro but defmt is used to log the panic message
debug_assert_ne	Just like the core::debug_assert_ne! macro but defmt is used to log the panic message
error	Logs data at error level.
info	Logs data at info level.
intern	Creates an interned string (Str) from a string literal.
panic	Just like the core::panic! macro but defmt is used to log the panic message
timestamp	Defines the global timestamp provider for defmt.
todo	Just like the core::todo! macro but defmt is used to log the panic message
trace	Logs data at trace level.
unimplemented	Just like the core::unimplemented! macro but defmt is used to log the panic message
unreachable	Just like the core::unreachable! macro but defmt is used to log the panic message
unwrap	Unwraps an Option or Result, panicking if it is None or Err.
warn	Logs data at warn level.
write	Writes formatted data to a Formatter.

Structs

Debug2Format	An “adapter” type to feed Debug values into defmt macros, which expect defmt::Format values.
Display2Format	An “adapter” type to feed Display values into defmt macros, which expect defmt::Format values.
Formatter	Handle to a defmt logger.
Str	An interned string created via intern!.

Traits

Format	Trait for types that can be formatted via defmt.
Logger	Global logger acquire-release mechanism
Write	Trait for defmt logging targets.

Attribute Macros

global_logger	Defines the global defmt logger.
panic_handler	Overrides the panicking behavior of defmt::panic!