Added

• Implementations of the WriteIter and WriteIterRead traits from embedded-hal (#53 by @thejpster).

Changed

• BREAKING Upgraded to cortex-m 0.7.
• BREAKING Upgraded to atomic-polyfill 1.0.
• BREAKING Upgraded to xtensa-lx 0.8 (#49 by @jscatena88).

Changed

• Upgraded to embedded-hal alpha support to version 9. Please pin your dependency on shared-bus to an exact version (using =0.#.#) when you make use of the eh-alpha feature flag (#38 by @taks).

Fixed

• Fixed the new_xtensa!() macro not compiling (#40 by @Gazedo).

Added

• Added support for the I2C traits from the embedded-hal alpha 8 version (eh-alpha feature flag) (#36).

Fixed

• Fixed the atomic-polyfill dependency being pulled in even in cases where it is not used.
• Fixed a problem with the ADC sharing embedded-hal dependency.

Added

• A mutex type for Xtensa LX6 micorontrollers (e.g. ESP32) (#22 by @pyaillet).
• A proxy type for sharing an ADC to allow "concurrently" reading its channels from multiple tasks (#24 by @geomatsi).
• Support for thumbv6 targets by using atomic-polyfill instead of libcore atomics (#30).

Changed

• Updated the documentation on how to use shared-bus with RTIC.
• Removed superfluous trait bounds on the types - the trait bounds are really only necessary on the impl-blocks.

Fixed

• Fixed the Clone implementations from 0.2.1 being useless due to an unnecessary trait bound.

Added

• Added a new "Mutex" and bus-manager for compatibility with RTIC. Check the documentation for the BusManagerAtomicCheck for details.

Changed

• I2cProxy and SpiProxy now implement Clone. Cloning a proxy might be useful if a driver wants to split bus access up even further internally without wrapping the bus-proxy in another bus-manager.

Complete rework of the crate, most items have changed at least slightly.
Please read the updated documentation to understand how the new version
works.

Added

• A BusMutexSimple for sharing within a single task/thread with minimal overhead.
• Macros for instanciating a 'global' bus manager which lives for 'static.

Changed

• The BusMutex trait's lock() method now passes &mut to the closure, removing the RefCell from the manager.
• The generic parameter of BusMutex was moved into an associated type.
• Instead of a single proxy-type for everything, separate proxy types were introduced, to allow different constraints on their creation.

Fixed

• The SPI proxy is now !Send to make sure it can only be used from within a single thread/task.