Release 1.0.0-alpha.6

*** This is (also) an alpha release with breaking changes (sorry) ***

Changed

• Use u8 as default SPI as Serial Word type
• The Minimum Supported Rust Version (MSRV) is now 1.46.0

Added

• Added Can Controller Area Network traits.
• Error traits for SPI, I2C and Serial traits. The error types used in those must
  implement these Error traits, which implies providing a conversion to a common
  set of error kinds. Generic drivers using these interfaces can then convert the errors
  to this common set to act upon them.

Removed

• Removed DelayMs in favor of DelayUs with u32 as type for clarity.

Release 1.0.0-alpha.5

*** This is (also) an alpha release with breaking changes (sorry) ***

Added

• Added IoPin trait for pins that can change between being inputs or outputs
  dynamically.
• Added Debug to all spi mode types.

Changed

• Swap PWM channel arguments to references
• All trait methods have been renamed to remove the try_ prefix (i.e. try_send -> send) for consistency.
• Moved all traits into two sub modules for each feature depending on the execution model: blocking and nb (non-blocking). For example, the spi traits can now be found under embedded_hal::spi::blocking or embedded_hal::spi::nb.
• Execution-model-independent definitions have been moved into the feature module. For example, SPI Phase is now defined in embedded_hal::spi::Phase. For convenience, these definitions are reexported in both of its blocking and non-blocking submodules.
• Re-export nb::{block!, Error, Result} to avoid version mismatches. These should be used instead of
  importing the nb crate directly in dependent crates.
• blocking::Serial: renamed bwrite_all to write, bflush to `flush.
• Removed prelude to avoid method name conflicts between different flavors (blocking, nb) of the same trait. Traits must now be manually imported.
• Removed the various Default marker traits.
• Removed &[W] returned slice in spi::blocking::Transfer.
• Require all associated error types to implement core::fmt::Debug.

Removed

• Removed random number generation (rng) traits in favor of rand_core.

Release 0.2.6

Added

Backported non-breaking changes from the upcoming 1.0 release:

• Transactional SPI interface for executing groups of SPI transactions.
• Transactional I2C interface for executing groups of I2C transactions.
• 10-bit addressing mode for I2C traits.
• set_state method for OutputPin using an input PinState value.
• IoPin trait for pins that can change between being inputs or outputs
  dynamically.