Added a new Display Trait, but that is still in work and renamed a few other traitnames to make them more clear

src/epd4in2/mod.rs

@@ -73,7 +73,8 @@ pub const SPI_MODE: Mode = Mode {
 
 /// EPD4in2 driver
 ///
-pub struct EPD4in2<SPI, CS, BUSY, DC, RST, D> {
+pub struct EPD4in2<SPI, CS, BUSY, DC, RST, D>
+  {
     /// Connection Interface
     interface: ConnectionInterface<SPI, CS, BUSY, DC, RST, D>,
     /// Width
@@ -84,15 +85,17 @@ pub struct EPD4in2<SPI, CS, BUSY, DC, RST, D> {
     color: Color,
 }
 
-impl<SPI, CS, BUSY, DC, RST, D, E> WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
-    for EPD4in2<SPI, CS, BUSY, DC, RST, D>
-where
-    SPI: Write<u8, Error = E>,
+
+
+impl<SPI, CS, BUSY, DataCommand, RST, Delay, Error> WaveshareInterface<SPI, CS, BUSY, DataCommand, RST, Delay, Error>
+    for EPD4in2<SPI, CS, BUSY, DataCommand, RST, Delay>
+where 
+    SPI: Write<u8>,
     CS: OutputPin,
     BUSY: InputPin,
-    DC: OutputPin,
+    DataCommand: OutputPin,
     RST: OutputPin,
-    D: DelayUs<u16> + DelayMs<u16>,
+    Delay: DelayUs<u16> + DelayMs<u16>,
 {
     fn get_width(&self) -> u16 {
         self.width
@@ -117,11 +120,11 @@ where
     ///
     /// epd4in2.sleep();
     /// ```
-    fn new(spi: SPI, cs: CS, busy: BUSY, dc: DC, rst: RST, delay: D) -> Result<Self, E> {
+    fn new(interface: ConnectionInterface<SPI, CS, BUSY, DataCommand, RST, Delay>) -> Result<Self, Error> {
         let width = WIDTH as u16;
         let height = HEIGHT as u16;
 
-        let interface = ConnectionInterface::new(spi, cs, busy, dc, rst, delay);
+        
         let color = Color::White;
         let mut epd = EPD4in2 {
             interface,
@@ -135,7 +138,7 @@ where
         Ok(epd)
     }
 
-    fn init(&mut self) -> Result<(), E> {
+    fn init(&mut self) -> Result<(), Error> {
         // reset the device
         self.reset();
 

src/interface/mod.rs

@@ -12,6 +12,7 @@ use drawing::color::Color;
 
 /// Interface for the physical connection between display and the controlling device
 pub mod connection_interface;
+use self::connection_interface::ConnectionInterface;
 
 
 /// All commands need to have this trait which gives the address of the command
@@ -21,6 +22,12 @@ pub(crate) trait Command {
 }
 
 
+pub trait Displays {
+    fn width(self) -> u8;
+    fn height(self) -> u8;
+}
+
+
 //TODO: add LUT trait with set_fast_lut and set_manual_lut and set_normal_lut or sth like that?
 // for partial updates
 trait LUTSupport<Error> {
@@ -30,14 +37,14 @@ trait LUTSupport<Error> {
 }
 
 
-pub trait WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
+pub trait WaveshareInterface<SPI, CS, BUSY, DataCommand, RST, Delay, Error>
     where 
-        SPI: Write<u8, Error = E>,
+        SPI: Write<u8>,
         CS: OutputPin,
         BUSY: InputPin,
-        DC: OutputPin,
+        DataCommand: OutputPin,
         RST: OutputPin,
-        D: DelayUs<u16> + DelayMs<u16>,
+        Delay: DelayUs<u16> + DelayMs<u16>,
 {
     /// Get the width of the display
     fn get_width(&self) -> u16;
@@ -49,13 +56,8 @@ pub trait WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
     /// 
     /// This already initialises the device. That means [init()](WaveshareInterface::init()) isn't needed directly afterwards
     fn new(
-        spi: SPI, 
-        cs: CS, 
-        busy: BUSY, 
-        dc: DC, 
-        rst: RST, 
-        delay: D
-    ) -> Result<Self, E>
+        interface: ConnectionInterface<SPI, CS, BUSY, DataCommand, RST, Delay>,
+    ) -> Result<Self, Error>
         where Self: Sized;
 
     /// This initialises the EPD and powers it up
@@ -65,13 +67,13 @@ pub trait WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
     /// This function calls [reset()](WaveshareInterface::reset()),
     /// so you don't need to call reset your self when trying to wake your device up
     /// after setting it to sleep.
-    fn init(&mut self) -> Result<(), E>;
+    fn init(&mut self) -> Result<(), Error>;
 
 
     // void DisplayFrame(const unsigned char* frame_buffer);
     /// Transmit a full frame to the SRAM of the DPD
     /// 
-    fn update_frame(&mut self, buffer: &[u8]) -> Result<(), E>;
+    fn update_frame(&mut self, buffer: &[u8]) -> Result<(), Error>;
 
     //TODO: is dtm always used?
     /// Transmit partial data to the SRAM of the EPD,
@@ -81,18 +83,18 @@ pub trait WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
     /// Normally it should be dtm2, so use false
     /// 
     /// BUFFER needs to be of size: w / 8 * l !
-    fn update_partial_frame(&mut self, buffer: &[u8], x: u16, y: u16, width: u16, height: u16) -> Result<(), E>;
+    fn update_partial_frame(&mut self, buffer: &[u8], x: u16, y: u16, width: u16, height: u16) -> Result<(), Error>;
 
     /// Displays the frame data from SRAM
-    fn display_frame(&mut self) -> Result<(), E>;
+    fn display_frame(&mut self) -> Result<(), Error>;
 
     // TODO: add this abstraction function
-    fn update_and_display_frame(&mut self, buffer: &[u8]) -> Result<(), E>;
+    fn update_and_display_frame(&mut self, buffer: &[u8]) -> Result<(), Error>;
 
     /// Clears the frame from the buffer
     /// 
     /// Uses the chosen background color
-    fn clear_frame(&mut self) -> Result<(), E>;
+    fn clear_frame(&mut self) -> Result<(), Error>;
 
     /// Sets the backgroundcolor for various commands like [clear_frame()](WaveshareInterface::clear_frame())
     fn set_background_color(&mut self, color: Color);
@@ -104,7 +106,7 @@ pub trait WaveshareInterface<SPI, CS, BUSY, DC, RST, D, E>
     /// But you can also use [reset()](WaveshareInterface::reset()) to awaken.
     /// But as you need to power it up once more anyway you can also just directly use [init()](WaveshareInterface::init()) for resetting
     /// and initialising which already contains the reset
-    fn sleep(&mut self) -> Result<(), E>;
+    fn sleep(&mut self) -> Result<(), Error>;
 
     /// Resets the device.
     ///