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#![no_std] //! A generic display interface //! //! This crate contains an error type and traits to implement for bus interface drivers drivers to //! be consumed by display drivers. It abstracts over the different communication methods available //! to drive a display and allows a driver writer to focus on driving the display itself and only //! have to implement a single interface. pub mod prelude; /// A ubiquitous error type for all kinds of problems which could happen when communicating with a /// display #[derive(Clone, Debug)] pub enum DisplayError { /// Unable to write to bus BusWriteError, /// Unable to assert or de-assert data/command switching signal DCError, /// Unable to assert chip select signal CSError, } /// This trait implements a write-only interface for a display which has separate data and command /// modes. It is the responsibility of implementations to activate the correct mode in their /// implementation when corresponding method is called. pub trait WriteOnlyDataCommand<WIDTH> { /// Send a batch of commands to display fn send_commands(&mut self, cmd: &[WIDTH]) -> Result<(), DisplayError>; /// Send pixel data to display fn send_data(&mut self, buf: &[WIDTH]) -> Result<(), DisplayError>; }