Add 7in5bc support, caemor#26

README.md

@@ -39,6 +39,7 @@ epd.update_and_display_frame(&mut spi, &display.buffer())?;
 | Device (with Link) | Colors | Flexible Display | Partial Refresh | Supported | Tested |
 | :---: | --- | :---: | :---: | :---: | :---: |
 | [7.5 Inch B/W V2 (A)](https://www.waveshare.com/product/7.5inch-e-paper-hat.htm) [[1](#1-75-inch-bw-v2-a)] | Black, White | ✕ | ✕ | ✔ | ✔ |
+| [7.5 Inch B/W/R (B/C)](https://www.waveshare.com/7.5inch-e-Paper-HAT-B.htm) | Black, White, Red | ✔ | ✕ | ✔ | ✔ |
 | [7.5 Inch B/W (A)](https://www.waveshare.com/product/7.5inch-e-paper-hat.htm) | Black, White | ✕ | ✕ | ✔ | ✔ |
 | [4.2 Inch B/W (A)](https://www.waveshare.com/product/4.2inch-e-paper-module.htm) | Black, White | ✕ | Not officially [[2](#2-42-inch-e-ink-blackwhite---partial-refresh)] | ✔ | ✔ |
 | [1.54 Inch B/W (A)](https://www.waveshare.com/1.54inch-e-Paper-Module.htm) | Black, White | ✕ | ✔ | ✔ | ✔ |

src/epd7in5bc/command.rs

@@ -0,0 +1,154 @@
+//! SPI Commands for the Waveshare 7.5" E-Ink Display
+
+use crate::traits;
+
+/// EPD7in5b commands
+///
+/// Should rarely (never?) be needed directly.
+///
+/// For more infos about the addresses and what they are doing look into the PDFs.
+#[allow(dead_code)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone)]
+pub(crate) enum Command {
+    /// Set Resolution, LUT selection, BWR pixels, gate scan direction, source shift
+    /// direction, booster switch, soft reset.
+    PANEL_SETTING = 0x00,
+
+    /// Selecting internal and external power
+    POWER_SETTING = 0x01,
+
+    /// After the Power Off command, the driver will power off following the Power Off
+    /// Sequence; BUSY signal will become "0". This command will turn off charge pump,
+    /// T-con, source driver, gate driver, VCOM, and temperature sensor, but register
+    /// data will be kept until VDD becomes OFF. Source Driver output and Vcom will remain
+    /// as previous condition, which may have 2 conditions: 0V or floating.
+    POWER_OFF = 0x02,
+
+    /// Setting Power OFF sequence
+    POWER_OFF_SEQUENCE_SETTING = 0x03,
+
+    /// Turning On the Power
+    ///
+    /// After the Power ON command, the driver will power on following the Power ON
+    /// sequence. Once complete, the BUSY signal will become "1".
+    POWER_ON = 0x04,
+
+    /// Starting data transmission
+    BOOSTER_SOFT_START = 0x06,
+
+    /// This command makes the chip enter the deep-sleep mode to save power.
+    ///
+    /// The deep sleep mode would return to stand-by by hardware reset.
+    ///
+    /// The only one parameter is a check code, the command would be excuted if check code = 0xA5.
+    DEEP_SLEEP = 0x07,
+
+    /// This command starts transmitting data and write them into SRAM. To complete data
+    /// transmission, command DSP (Data Stop) must be issued. Then the chip will start to
+    /// send data/VCOM for panel.
+    DATA_START_TRANSMISSION_1 = 0x10,
+
+    /// To stop data transmission, this command must be issued to check the `data_flag`.
+    ///
+    /// After this command, BUSY signal will become "0" until the display update is
+    /// finished.
+    DATA_STOP = 0x11,
+
+    /// After this command is issued, driver will refresh display (data/VCOM) according to
+    /// SRAM data and LUT.
+    ///
+    /// After Display Refresh command, BUSY signal will become "0" until the display
+    /// update is finished.
+    DISPLAY_REFRESH = 0x12,
+
+    /// After this command is issued, image process engine will find thin lines/pixels
+    /// from frame SRAM and update the frame SRAM for applying new gray level waveform.
+    ///
+    /// After "Image Process Command", BUSY_N signal will become "0" until image process
+    /// is finished.
+    IMAGE_PROCESS = 0x13,
+
+    /// This command builds the VCOM Look-Up Table (LUTC).
+    LUT_FOR_VCOM = 0x20,
+    /// This command builds the Black Look-Up Table (LUTB).
+    LUT_BLACK = 0x21,
+    /// This command builds the White Look-Up Table (LUTW).
+    LUT_WHITE = 0x22,
+    /// This command builds the Gray1 Look-Up Table (LUTG1).
+    LUT_GRAY_1 = 0x23,
+    /// This command builds the Gray2 Look-Up Table (LUTG2).
+    LUT_GRAY_2 = 0x24,
+    /// This command builds the Red0 Look-Up Table (LUTR0).
+    LUT_RED_0 = 0x25,
+    /// This command builds the Red1 Look-Up Table (LUTR1).
+    LUT_RED_1 = 0x26,
+    /// This command builds the Red2 Look-Up Table (LUTR2).
+    LUT_RED_2 = 0x27,
+    /// This command builds the Red3 Look-Up Table (LUTR3).
+    LUT_RED_3 = 0x28,
+    /// This command builds the XON Look-Up Table (LUTXON).
+    LUT_XON = 0x29,
+
+    /// The command controls the PLL clock frequency.
+    PLL_CONTROL = 0x30,
+
+    /// This command reads the temperature sensed by the temperature sensor.
+    TEMPERATURE_SENSOR_COMMAND = 0x40,
+    /// This command selects the Internal or External temperature sensor.
+    TEMPERATURE_CALIBRATION = 0x41,
+    /// This command could write data to the external temperature sensor.
+    TEMPERATURE_SENSOR_WRITE = 0x42,
+    /// This command could read data from the external temperature sensor.
+    TEMPERATURE_SENSOR_READ = 0x43,
+
+    /// This command indicates the interval of Vcom and data output. When setting the
+    /// vertical back porch, the total blanking will be kept (20 Hsync).
+    VCOM_AND_DATA_INTERVAL_SETTING = 0x50,
+    /// This command indicates the input power condition. Host can read this flag to learn
+    /// the battery condition.
+    LOW_POWER_DETECTION = 0x51,
+
+    /// This command defines non-overlap period of Gate and Source.
+    TCON_SETTING = 0x60,
+    /// This command defines alternative resolution and this setting is of higher priority
+    /// than the RES\[1:0\] in R00H (PSR).
+    TCON_RESOLUTION = 0x61,
+    /// This command defines MCU host direct access external memory mode.
+    SPI_FLASH_CONTROL = 0x65,
+
+    /// The LUT_REV / Chip Revision is read from OTP address = 25001 and 25000.
+    REVISION = 0x70,
+    /// This command reads the IC status.
+    GET_STATUS = 0x71,
+
+    /// This command implements related VCOM sensing setting.
+    AUTO_MEASUREMENT_VCOM = 0x80,
+    /// This command gets the VCOM value.
+    READ_VCOM_VALUE = 0x81,
+    /// This command sets `VCOM_DC` value.
+    VCM_DC_SETTING = 0x82,
+
+    /// This is in all the Waveshare controllers for EPD7in5, but it's not documented
+    /// anywhere in the datasheet `¯\_(ツ)_/¯`
+    FLASH_MODE = 0xE5,
+}
+
+impl traits::Command for Command {
+    /// Returns the address of the command
+    fn address(self) -> u8 {
+        self as u8
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::traits::Command as CommandTrait;
+
+    #[test]
+    fn command_addr() {
+        assert_eq!(Command::PANEL_SETTING.address(), 0x00);
+        assert_eq!(Command::DISPLAY_REFRESH.address(), 0x12);
+    }
+}

src/epd7in5bc/graphics.rs

@@ -0,0 +1,146 @@
+use crate::epd7in5::{DEFAULT_BACKGROUND_COLOR, HEIGHT, WIDTH};
+use crate::graphics::{Display, DisplayRotation};
+use embedded_graphics::pixelcolor::BinaryColor;
+use embedded_graphics::prelude::*;
+
+/// Full size buffer for use with the 7in5 EPD
+///
+/// Can also be manually constructed:
+/// `buffer: [DEFAULT_BACKGROUND_COLOR.get_byte_value(); WIDTH / 8 * HEIGHT]`
+pub struct Display7in5bc {
+    buffer: [u8; WIDTH as usize * HEIGHT as usize / 8],
+    rotation: DisplayRotation,
+}
+
+impl Default for Display7in5bc {
+    fn default() -> Self {
+        Display7in5bc {
+            buffer: [DEFAULT_BACKGROUND_COLOR.get_byte_value();
+                WIDTH as usize * HEIGHT as usize / 8],
+            rotation: DisplayRotation::default(),
+        }
+    }
+}
+
+impl DrawTarget<BinaryColor> for Display7in5bc {
+    type Error = core::convert::Infallible;
+
+    fn draw_pixel(&mut self, pixel: Pixel<BinaryColor>) -> Result<(), Self::Error> {
+        self.draw_helper(WIDTH, HEIGHT, pixel)
+    }
+
+    fn size(&self) -> Size {
+        Size::new(WIDTH, HEIGHT)
+    }
+}
+
+impl Display for Display7in5bc {
+    fn buffer(&self) -> &[u8] {
+        &self.buffer
+    }
+
+    fn get_mut_buffer(&mut self) -> &mut [u8] {
+        &mut self.buffer
+    }
+
+    fn set_rotation(&mut self, rotation: DisplayRotation) {
+        self.rotation = rotation;
+    }
+
+    fn rotation(&self) -> DisplayRotation {
+        self.rotation
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::color::Black;
+    use crate::color::Color;
+    use crate::epd7in5;
+    use crate::graphics::{Display, DisplayRotation};
+    use embedded_graphics::{primitives::Line, style::PrimitiveStyle};
+
+    // test buffer length
+    #[test]
+    fn graphics_size() {
+        let display = Display7in5bc::default();
+        assert_eq!(display.buffer().len(), 30720);
+    }
+
+    // test default background color on all bytes
+    #[test]
+    fn graphics_default() {
+        let display = Display7in5bc::default();
+        for &byte in display.buffer() {
+            assert_eq!(byte, epd7in5::DEFAULT_BACKGROUND_COLOR.get_byte_value());
+        }
+    }
+
+    #[test]
+    fn graphics_rotation_0() {
+        let mut display = Display7in5bc::default();
+        let _ = Line::new(Point::new(0, 0), Point::new(7, 0))
+            .into_styled(PrimitiveStyle::with_stroke(Black, 1))
+            .draw(&mut display);
+
+        let buffer = display.buffer();
+
+        assert_eq!(buffer[0], Color::Black.get_byte_value());
+
+        for &byte in buffer.iter().skip(1) {
+            assert_eq!(byte, epd7in5::DEFAULT_BACKGROUND_COLOR.get_byte_value());
+        }
+    }
+
+    #[test]
+    fn graphics_rotation_90() {
+        let mut display = Display7in5bc::default();
+        display.set_rotation(DisplayRotation::Rotate90);
+        let _ = Line::new(Point::new(0, 632), Point::new(0, 639))
+            .into_styled(PrimitiveStyle::with_stroke(Black, 1))
+            .draw(&mut display);
+
+        let buffer = display.buffer();
+
+        assert_eq!(buffer[0], Color::Black.get_byte_value());
+
+        for &byte in buffer.iter().skip(1) {
+            assert_eq!(byte, epd7in5::DEFAULT_BACKGROUND_COLOR.get_byte_value());
+        }
+    }
+
+    #[test]
+    fn graphics_rotation_180() {
+        let mut display = Display7in5bc::default();
+        display.set_rotation(DisplayRotation::Rotate180);
+        let _ = Line::new(Point::new(632, 383), Point::new(639, 383))
+            .into_styled(PrimitiveStyle::with_stroke(Black, 1))
+            .draw(&mut display);
+
+        let buffer = display.buffer();
+
+        assert_eq!(buffer[0], Color::Black.get_byte_value());
+
+        for &byte in buffer.iter().skip(1) {
+            assert_eq!(byte, epd7in5::DEFAULT_BACKGROUND_COLOR.get_byte_value());
+        }
+    }
+
+    #[test]
+    fn graphics_rotation_270() {
+        let mut display = Display7in5bc::default();
+        display.set_rotation(DisplayRotation::Rotate270);
+        let _ = Line::new(Point::new(383, 0), Point::new(383, 7))
+            .into_styled(PrimitiveStyle::with_stroke(Black, 1))
+            .draw(&mut display);
+
+        let buffer = display.buffer();
+
+        assert_eq!(buffer[0], Color::Black.get_byte_value());
+
+        for &byte in buffer.iter().skip(1) {
+            assert_eq!(byte, epd7in5::DEFAULT_BACKGROUND_COLOR.get_byte_value());
+        }
+    }
+}