Rename red to chromatic, rename epd2in9b to epd2in9bc

src/color.rs

@@ -24,8 +24,8 @@ pub enum TriColor {
     Black,
     /// White color
     White,
-    /// Red color
-    Red,
+    /// Chromatic color
+    Chromatic,
 }
 
 //TODO: Rename get_bit_value to bit() and get_byte_value to byte() ?

src/epd1in54b/mod.rs

@@ -101,8 +101,13 @@ where
         &mut self,
         spi: &mut SPI,
         black: &[u8],
-        red: &[u8],
+        chromatic: &[u8],
     ) -> Result<(), SPI::Error> {
+        self.update_achromatic_frame(spi, black)?;
+        self.update_chromatic_frame(spi, chromatic)
+    }
+
+    fn update_achromatic_frame(&mut self, spi: &mut SPI, black: &[u8]) -> Result<(), SPI::Error> {
         self.wait_until_idle();
         self.send_resolution(spi)?;
 
@@ -113,10 +118,17 @@ where
             let expanded = expand_bits(*b);
             self.interface.data(spi, &expanded)?;
         }
+        Ok(())
+    }
 
+    fn update_chromatic_frame(
+        &mut self,
+        spi: &mut SPI,
+        chromatic: &[u8],
+    ) -> Result<(), SPI::Error> {
         self.interface
             .cmd(spi, Command::DATA_START_TRANSMISSION_2)?;
-        self.interface.data(spi, red)?;
+        self.interface.data(spi, chromatic)?;
         Ok(())
     }
 }

src/epd2in9bc/command.rs

@@ -1,4 +1,4 @@
-//! SPI Commands for the Waveshare 2.9" red E-Ink Display
+//! SPI Commands for the Waveshare 2.9" (B/C) E-Ink Display
 use crate::traits;
 
 #[allow(dead_code)]

src/epd2in9bc/graphics.rs

@@ -1,26 +1,26 @@
-use crate::epd2in9b::{DEFAULT_BACKGROUND_COLOR, HEIGHT, NUM_DISPLAY_BITS, WIDTH};
+use crate::epd2in9bc::{DEFAULT_BACKGROUND_COLOR, HEIGHT, NUM_DISPLAY_BITS, WIDTH};
 use crate::graphics::{Display, DisplayRotation};
 use embedded_graphics::pixelcolor::BinaryColor;
 use embedded_graphics::prelude::*;
 
-/// Full size buffer for use with the 2in9b EPD
+/// Full size buffer for use with the 2in9b/c EPD
 ///
 /// Can also be manually constructed and be used together with VarDisplay
-pub struct Display2in9b {
+pub struct Display2in9bc {
     buffer: [u8; NUM_DISPLAY_BITS as usize],
     rotation: DisplayRotation,
 }
 
-impl Default for Display2in9b {
+impl Default for Display2in9bc {
     fn default() -> Self {
-        Display2in9b {
+        Display2in9bc {
             buffer: [DEFAULT_BACKGROUND_COLOR.get_byte_value(); NUM_DISPLAY_BITS as usize],
             rotation: DisplayRotation::default(),
         }
     }
 }
 
-impl DrawTarget<BinaryColor> for Display2in9b {
+impl DrawTarget<BinaryColor> for Display2in9bc {
     type Error = core::convert::Infallible;
 
     fn draw_pixel(&mut self, pixel: Pixel<BinaryColor>) -> Result<(), Self::Error> {
@@ -32,7 +32,7 @@ impl DrawTarget<BinaryColor> for Display2in9b {
     }
 }
 
-impl Display for Display2in9b {
+impl Display for Display2in9bc {
     fn buffer(&self) -> &[u8] {
         &self.buffer
     }

src/epd2in9bc/mod.rs

@@ -1,5 +1,4 @@
-//! A simple Driver for the Waveshare 2.9" (B) E-Ink Display via SPI
-
+//! A simple Driver for the Waveshare 2.9" (B/C) E-Ink Display via SPI
 use embedded_hal::{
     blocking::{delay::*, spi::Write},
     digital::v2::*,
@@ -10,11 +9,11 @@ use crate::traits::{
     InternalWiAdditions, RefreshLUT, WaveshareDisplay, WaveshareThreeColorDisplay,
 };
 
-/// Width of epd2in9b in pixels
+/// Width of epd2in9bc in pixels
 pub const WIDTH: u32 = 128;
-/// Height of epd2in9b in pixels
+/// Height of epd2in9bc in pixels
 pub const HEIGHT: u32 = 296;
-/// Default background color (white) of epd2in9b display
+/// Default background color (white) of epd2in9bc display
 pub const DEFAULT_BACKGROUND_COLOR: Color = Color::White;
 
 const NUM_DISPLAY_BITS: u32 = WIDTH * HEIGHT / 8;
@@ -23,7 +22,7 @@ const IS_BUSY_LOW: bool = true;
 const VCOM_DATA_INTERVAL: u8 = 0x07;
 const WHITE_BORDER: u8 = 0x70;
 const BLACK_BORDER: u8 = 0x30;
-const RED_BORDER: u8 = 0xb0;
+const CHROMATIC_BORDER: u8 = 0xb0;
 const FLOATING_BORDER: u8 = 0xF0;
 
 use crate::color::{Color, TriColor};
@@ -34,16 +33,16 @@ use self::command::Command;
 #[cfg(feature = "graphics")]
 mod graphics;
 #[cfg(feature = "graphics")]
-pub use self::graphics::Display2in9b;
+pub use self::graphics::Display2in9bc;
 
-/// EPD2in9b driver
-pub struct EPD2in9b<SPI, CS, BUSY, DC, RST> {
+/// EPD2in9bc driver
+pub struct EPD2in9bc<SPI, CS, BUSY, DC, RST> {
     interface: DisplayInterface<SPI, CS, BUSY, DC, RST>,
     color: Color,
 }
 
 impl<SPI, CS, BUSY, DC, RST> InternalWiAdditions<SPI, CS, BUSY, DC, RST>
-    for EPD2in9b<SPI, CS, BUSY, DC, RST>
+    for EPD2in9bc<SPI, CS, BUSY, DC, RST>
 where
     SPI: Write<u8>,
     CS: OutputPin,
@@ -90,7 +89,7 @@ where
 }
 
 impl<SPI, CS, BUSY, DC, RST> WaveshareThreeColorDisplay<SPI, CS, BUSY, DC, RST>
-    for EPD2in9b<SPI, CS, BUSY, DC, RST>
+    for EPD2in9bc<SPI, CS, BUSY, DC, RST>
 where
     SPI: Write<u8>,
     CS: OutputPin,
@@ -102,15 +101,41 @@ where
         &mut self,
         spi: &mut SPI,
         black: &[u8],
-        red: &[u8],
+        chromatic: &[u8],
     ) -> Result<(), SPI::Error> {
-        self.update_mono_frame(spi, black)?;
-        self.update_red_frame(spi, red)
+        self.update_achromatic_frame(spi, black)?;
+        self.update_chromatic_frame(spi, chromatic)
+    }
+
+    /// Update only the black/white data of the display.
+    ///
+    /// Finish by calling `update_chromatic_frame`.
+    fn update_achromatic_frame(&mut self, spi: &mut SPI, black: &[u8]) -> Result<(), SPI::Error> {
+        self.interface
+            .cmd(spi, Command::DATA_START_TRANSMISSION_1)?;
+        self.interface.data(spi, black)?;
+        Ok(())
+    }
+
+    /// Update only chromatic data of the display.
+    ///
+    /// This data takes precedence over the black/white data.
+    fn update_chromatic_frame(
+        &mut self,
+        spi: &mut SPI,
+        chromatic: &[u8],
+    ) -> Result<(), SPI::Error> {
+        self.interface
+            .cmd(spi, Command::DATA_START_TRANSMISSION_2)?;
+        self.interface.data(spi, chromatic)?;
+
+        self.wait_until_idle();
+        Ok(())
     }
 }
 
 impl<SPI, CS, BUSY, DC, RST> WaveshareDisplay<SPI, CS, BUSY, DC, RST>
-    for EPD2in9b<SPI, CS, BUSY, DC, RST>
+    for EPD2in9bc<SPI, CS, BUSY, DC, RST>
 where
     SPI: Write<u8>,
     CS: OutputPin,
@@ -129,7 +154,7 @@ where
         let interface = DisplayInterface::new(cs, busy, dc, rst);
         let color = DEFAULT_BACKGROUND_COLOR;
 
-        let mut epd = EPD2in9b { interface, color };
+        let mut epd = EPD2in9bc { interface, color };
 
         epd.init(spi, delay)?;
 
@@ -183,7 +208,7 @@ where
 
         self.interface.data(spi, &buffer)?;
 
-        // Clear the red layer
+        // Clear the chromatic layer
         let color = self.color.get_byte_value();
 
         self.interface
@@ -231,7 +256,7 @@ where
 
         self.interface.data_x_times(spi, color, NUM_DISPLAY_BITS)?;
 
-        // Clear the red
+        // Clear the chromatic
         self.interface
             .cmd(spi, Command::DATA_START_TRANSMISSION_2)?;
         self.interface.data_x_times(spi, color, NUM_DISPLAY_BITS)?;
@@ -253,7 +278,7 @@ where
     }
 }
 
-impl<SPI, CS, BUSY, DC, RST> EPD2in9b<SPI, CS, BUSY, DC, RST>
+impl<SPI, CS, BUSY, DC, RST> EPD2in9bc<SPI, CS, BUSY, DC, RST>
 where
     SPI: Write<u8>,
     CS: OutputPin,
@@ -298,7 +323,7 @@ where
         let border = match color {
             TriColor::Black => BLACK_BORDER,
             TriColor::White => WHITE_BORDER,
-            TriColor::Red => RED_BORDER,
+            TriColor::Chromatic => CHROMATIC_BORDER,
         };
         self.cmd_with_data(
             spi,
@@ -306,26 +331,4 @@ where
             &[border | VCOM_DATA_INTERVAL],
         )
     }
-
-    /// Update only the black/white data of the display.
-    ///
-    /// Finish by calling `update_red_frame`.
-    pub fn update_mono_frame(&mut self, spi: &mut SPI, black: &[u8]) -> Result<(), SPI::Error> {
-        self.interface
-            .cmd(spi, Command::DATA_START_TRANSMISSION_1)?;
-        self.interface.data(spi, black)?;
-        Ok(())
-    }
-
-    /// Update only red data of the display.
-    ///
-    /// This data takes precedence over the black/white data.
-    pub fn update_red_frame(&mut self, spi: &mut SPI, red: &[u8]) -> Result<(), SPI::Error> {
-        self.interface
-            .cmd(spi, Command::DATA_START_TRANSMISSION_2)?;
-        self.interface.data(spi, red)?;
-
-        self.wait_until_idle();
-        Ok(())
-    }
 }

src/lib.rs

@@ -75,7 +75,7 @@ mod interface;
 pub mod epd1in54;
 pub mod epd1in54b;
 pub mod epd2in9;
-pub mod epd2in9b;
+pub mod epd2in9bc;
 pub mod epd4in2;
 pub mod epd7in5;
 pub mod epd7in5_v2;

src/traits.rs

@@ -69,8 +69,20 @@ where
         &mut self,
         spi: &mut SPI,
         black: &[u8],
-        color: &[u8],
+        chromatic: &[u8],
     ) -> Result<(), SPI::Error>;
+
+    /// Update only the black/white data of the display.
+    ///
+    /// This must be finished by calling `update_chromatic_frame`.
+    fn update_achromatic_frame(&mut self, spi: &mut SPI, black: &[u8]) -> Result<(), SPI::Error>;
+
+    /// Update only the chromatic data of the display.
+    ///
+    /// This should be preceded by a call to `update_achromatic_frame`.
+    /// This data takes precedence over the black/white data.
+    fn update_chromatic_frame(&mut self, spi: &mut SPI, chromatic: &[u8])
+        -> Result<(), SPI::Error>;
 }
 
 /// All the functions to interact with the EPDs