pub trait Length:
Sealed
+ Unsigned
+ 'static {
type Word: 'static;
}Expand description
Type-level enum representing the SPI transaction length, in bytes
This trait acts as both a type-level enum, forming a type class for
transaction lengths, as well as a type-level function mapping the Length
to the corresponding Word size.
The SPI transaction length is represented in the type domain using
Unsigned types from the typenum crate. The length can be set
statically, using a length from U1 to U255, or it can be set
dynamically, using the DynLength marker type. All valid Length types
are re-exported in this module.
The SPI transaction length affects the word size for the embedded HAL
traits, as well as other aspects of the SPI API. Transaction lengths of 1-4
only require a single read/write of the DATA register, so they have an
AtomicSize behave differently than longer transaction lengths.
Required Associated Types§
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.