Add support for epd7in5bc_v3

examples/epd7in5bc_v3.rs

@@ -0,0 +1,145 @@
+#![deny(warnings)]
+
+use embedded_graphics::{
+    mono_font::MonoTextStyleBuilder,
+    prelude::*,
+    primitives::{Circle, Line, PrimitiveStyle},
+    text::{Baseline, Text, TextStyleBuilder},
+};
+use embedded_hal::prelude::*;
+use epd_waveshare::{
+    color::TriColor,
+    epd7in5bc_v3::{Display7in5bc, Epd7in5bc},
+    graphics::DisplayRotation,
+    prelude::*,
+};
+use linux_embedded_hal::{
+    spidev::{self, SpidevOptions},
+    sysfs_gpio::Direction,
+    Delay, Pin, Spidev,
+};
+
+// The pins in this example are for the Universal e-Paper Raw Panel Driver HAT
+// activate spi, gpio in raspi-config
+// needs to be run with sudo because of some sysfs_gpio permission problems and follow-up timing problems
+// see https://github.com/rust-embedded/rust-sysfs-gpio/issues/5 and follow-up issues
+
+fn main() -> Result<(), std::io::Error> {
+    // Configure SPI
+    // Settings are taken from
+    let mut spi = Spidev::open("/dev/spidev0.0").expect("spidev directory");
+    let options = SpidevOptions::new()
+        .bits_per_word(8)
+        .max_speed_hz(4_000_000)
+        .mode(spidev::SpiModeFlags::SPI_MODE_0)
+        .build();
+    spi.configure(&options).expect("spi configuration");
+
+    // Configure Digital I/O Pin to be used as Chip Select for SPI
+    let cs = Pin::new(26); //BCM7 CE0
+    cs.export().expect("cs export");
+    while !cs.is_exported() {}
+    cs.set_direction(Direction::Out).expect("CS Direction");
+    cs.set_value(1).expect("CS Value set to 1");
+
+    let busy = Pin::new(24); // GPIO 24, board J-18
+    busy.export().expect("busy export");
+    while !busy.is_exported() {}
+    busy.set_direction(Direction::In).expect("busy Direction");
+    //busy.set_value(1).expect("busy Value set to 1");
+
+    let dc = Pin::new(25); // GPIO 25, board J-22
+    dc.export().expect("dc export");
+    while !dc.is_exported() {}
+    dc.set_direction(Direction::Out).expect("dc Direction");
+    dc.set_value(1).expect("dc Value set to 1");
+
+    let rst = Pin::new(17); // GPIO 17, board J-11
+    rst.export().expect("rst export");
+    while !rst.is_exported() {}
+    rst.set_direction(Direction::Out).expect("rst Direction");
+    rst.set_value(1).expect("rst Value set to 1");
+
+    let mut delay = Delay {};
+
+    let mut epd7in5 =
+        Epd7in5bc::new(&mut spi, cs, busy, dc, rst, &mut delay).expect("eink initalize error");
+
+    println!("Test all the rotations");
+    let mut display = Display7in5bc::default();
+
+    display.set_rotation(DisplayRotation::Rotate0);
+    draw_text(&mut display, "Rotate 0!", 5, 5);
+
+    display.set_rotation(DisplayRotation::Rotate90);
+    draw_text(&mut display, "Rotate 90!", 5, 5);
+
+    display.set_rotation(DisplayRotation::Rotate180);
+    draw_text(&mut display, "Rotate 180!", 5, 5);
+
+    display.set_rotation(DisplayRotation::Rotate270);
+    draw_text(&mut display, "Rotate 270!", 5, 5);
+
+    epd7in5.update_frame(&mut spi, display.buffer(), &mut delay)?;
+    epd7in5
+        .display_frame(&mut spi, &mut delay)
+        .expect("display frame new graphics");
+    delay.delay_ms(5000u16);
+
+    display.clear_buffer(TriColor::White);
+    println!("Now test new graphics with default rotation and some special stuff:");
+
+    // draw a analog clock
+    let _ = Circle::with_center(Point::new(52, 52), 80)
+        .into_styled(PrimitiveStyle::with_fill(TriColor::Chromatic))
+        .draw(&mut display);
+    let _ = Circle::with_center(Point::new(52, 52), 80)
+        .into_styled(PrimitiveStyle::with_stroke(TriColor::Black, 3))
+        .draw(&mut display);
+    let _ = Line::new(Point::new(52, 52), Point::new(18, 28))
+        .into_styled(PrimitiveStyle::with_stroke(TriColor::White, 5))
+        .draw(&mut display);
+    let _ = Line::new(Point::new(52, 52), Point::new(68, 28))
+        .into_styled(PrimitiveStyle::with_stroke(TriColor::White, 1))
+        .draw(&mut display);
+
+    // draw white on black background
+    let style = MonoTextStyleBuilder::new()
+        .font(&embedded_graphics::mono_font::ascii::FONT_6X10)
+        .text_color(TriColor::White)
+        .background_color(TriColor::Chromatic)
+        .build();
+    let text_style = TextStyleBuilder::new().baseline(Baseline::Top).build();
+
+    let _ = Text::with_text_style("Hello World!", Point::new(112, 10), style, text_style)
+        .draw(&mut display);
+
+    // use bigger/different font
+    let style = MonoTextStyleBuilder::new()
+        .font(&embedded_graphics::mono_font::ascii::FONT_10X20)
+        .text_color(TriColor::White)
+        .background_color(TriColor::Chromatic)
+        .build();
+
+    let _ = Text::with_text_style("Hello\nWorld!", Point::new(112, 40), style, text_style)
+        .draw(&mut display);
+
+    epd7in5.update_color_frame(&mut spi, display.bw_buffer(), display.chromatic_buffer()).unwrap();
+    epd7in5.display_frame(&mut spi, &mut delay).unwrap();
+
+    println!("Finished tests - going to sleep");
+    epd7in5.clear_frame(&mut spi, &mut delay).unwrap();
+    epd7in5.sleep(&mut spi, &mut delay)
+}
+
+fn draw_text(display: &mut Display7in5bc, text: &str, x: i32, y: i32) {
+    let style = MonoTextStyleBuilder::new()
+        .font(&embedded_graphics::mono_font::ascii::FONT_6X10)
+        .text_color(TriColor::White)
+        .background_color(TriColor::Black)
+        .build();
+
+    let text_style = TextStyleBuilder::new().baseline(Baseline::Top).build();
+
+    let _ = Text::with_text_style(text, Point::new(x, y), style, text_style).draw(display);
+}

src/command_v3.rs

@@ -0,0 +1,141 @@
+
+use crate::traits;
+
+/// Epd7in5b_v3 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)]
+#[derive(Copy, Clone)]
+pub(crate) enum Command {
+    /// Set Resolution, LUT selection, BWR pixels, gate scan direction, source shift
+    /// direction, booster switch, soft reset.
+    PanelSetting = 0x00,
+
+    /// Selecting internal and external power
+    PowerSetting = 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.
+    PowerOff = 0x02,
+
+    /// Setting Power OFF sequence
+    PowerOffSequenceSetting = 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".
+    PowerOn = 0x04,
+
+    /// Starting data transmission
+    BoosterSoftStart = 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.
+    DeepSleep = 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.
+    ///
+    /// BLACK/WHITE or OLD_DATA
+    DataStartTransmissionBlackWhite = 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.
+    DataStop = 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.
+    DisplayRefresh = 0x12,
+
+    /// RED or NEW_DATA
+    DataStartTransmissionChromatic = 0x13,
+
+    /// Dual SPI - what for?
+    DualSpi = 0x15,
+
+    /// This command builds the VCOM Look-Up Table (LUTC).
+    LutForVcom = 0x20,
+    /// This command builds the White to White Look-Up Table (LUTWW).
+    LutWhiteToWhite = 0x21,
+    /// This command builds the Black to White Look-Up Table (LUTKW).
+    LutBlackToWhite = 0x22,
+    /// This command builds the White to Black Look-Up Table (LUTWK).
+    LutWhiteToBlack = 0x23,
+    /// This command builds the Black to Black Look-Up Table (LUTKK).
+    LutBlackToBlack = 0x24,
+    /// This command builds the Border? Look-Up Table (LUTR0).
+    LutBorder = 0x25,
+
+    /// This command builds the XON Look-Up Table (LUTXON).
+    LutXon = 0x2A,
+
+    /// The command controls the PLL clock frequency.
+    PllControl = 0x30,
+
+    /// This command reads the temperature sensed by the temperature sensor.
+    TemperatureSensor = 0x40,
+
+    /// This command indicates the interval of Vcom and data output. When setting the
+    /// vertical back porch, the total blanking will be kept (20 Hsync).
+    VcomAndDataIntervalSetting = 0x50,
+
+    /// This command defines non-overlap period of Gate and Source.
+    TconSetting = 0x60,
+    /// This command defines alternative resolution and this setting is of higher priority
+    /// than the RES\[1:0\] in R00H (PSR).
+    TconResolution = 0x61,
+    //TODO /// This command defines MCU host direct access external memory mode.
+    GateSourceStart = 0x65,
+
+    /// The LUT_REV / Chip Revision is read from OTP address = 25001 and 25000.
+    Revision = 0x70,
+
+    /// This command sets `VCOM_DC` value.
+    VcmDcSetting = 0x82,
+
+    // TODO
+    ProgramMode = 0xA0,
+    //
+    // TODO
+    ActiveProgram = 0xA1,
+
+    // TODO
+    ReadOtpData = 0xA2,
+    // /// This is in all the Waveshare controllers for Epd7in5, but it's not documented
+    // /// anywhere in the datasheet `¯\_(ツ)_/¯`
+    // FlashMode = 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::PanelSetting.address(), 0x00);
+        assert_eq!(Command::DisplayRefresh.address(), 0x12);
+    }
+}

src/epd7in5bc_v3/graphics.rs

@@ -0,0 +1,74 @@
+use crate::epd7in5bc_v3::{DEFAULT_BACKGROUND_COLOR, HEIGHT, WIDTH, NUM_DISPLAY_BITS};
+use crate::graphics::{DisplayColorRendering, DisplayRotation, TriDisplay};
+use crate::color::TriColor;
+use embedded_graphics_core::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; 2 * NUM_DISPLAY_BITS as usize],
+    rotation: DisplayRotation,
+}
+
+impl Default for Display7in5bc {
+    fn default() -> Self {
+        Display7in5bc {
+            buffer: [DEFAULT_BACKGROUND_COLOR.get_byte_value();
+                2 * NUM_DISPLAY_BITS as usize],
+            rotation: DisplayRotation::default(),
+        }
+    }
+}
+
+impl DrawTarget for Display7in5bc {
+    type Color = TriColor;
+    type Error = core::convert::Infallible;
+
+    fn draw_iter<I>(&mut self, pixels: I) -> Result<(), Self::Error>
+    where
+        I: IntoIterator<Item = Pixel<Self::Color>>,
+    {
+        for pixel in pixels {
+            self.draw_helper_tri(WIDTH, HEIGHT, pixel, DisplayColorRendering::Negative)?;
+        }
+        Ok(())
+    }
+}
+
+impl OriginDimensions for Display7in5bc {
+    fn size(&self) -> Size {
+        Size::new(WIDTH, HEIGHT)
+    }
+}
+
+impl TriDisplay 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
+    }
+
+    fn chromatic_offset(&self) -> usize {
+      NUM_DISPLAY_BITS as usize
+  }
+
+  fn bw_buffer(&self) -> &[u8] {
+      &self.buffer[0..self.chromatic_offset()]
+  }
+
+  fn chromatic_buffer(&self) -> &[u8] {
+      &self.buffer[self.chromatic_offset()..]
+  }
+}

src/epd7in5bc_v3/mod.rs

@@ -0,0 +1,283 @@
+//! A simple Driver for the Waveshare 7.5" E-Ink Display (V3) via SPI
+//!
+//! # References
+//!
+//! - [Datasheet](https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT)
+//! - [Waveshare C driver](https://github.com/waveshare/e-Paper/blob/702def0/RaspberryPi%26JetsonNano/c/lib/e-Paper/EPD_7in5_V2.c)
+//! - [Waveshare Python driver](https://github.com/waveshare/e-Paper/blob/702def0/RaspberryPi%26JetsonNano/python/lib/waveshare_epd/epd7in5_V2.py)
+//!
+//! Important note for V3:
+//! Revision V3 has been released on 2019.11, the resolution is upgraded to 800×480, from 640×384 of V1.
+//! The hardware and interface of V2 are compatible with V1, however, the related software should be updated.
+
+use embedded_hal::{
+    blocking::{delay::*, spi::Write},
+    digital::v2::{InputPin, OutputPin},
+};
+
+use crate::color::TriColor;
+use crate::interface::DisplayInterface;
+use crate::prelude::{WaveshareThreeColorDisplay};
+use crate::traits::{InternalWiAdditions, RefreshLut, WaveshareDisplay};
+
+use crate::command_v3::Command;
+
+#[cfg(feature = "graphics")]
+mod graphics;
+#[cfg(feature = "graphics")]
+pub use self::graphics::Display7in5bc;
+
+/// Width of epd7in5bc_v3 in pixels
+pub const WIDTH: u32 = 800;
+/// Height of epd7in5bc_v3 in pixels
+pub const HEIGHT: u32 = 480;
+/// Default background color (white) of epd7in5bc_v3 display
+pub const DEFAULT_BACKGROUND_COLOR: TriColor = TriColor::White;
+const IS_BUSY_LOW: bool = true;
+
+/// Number of bits for b/w buffer and same for chromatic buffer
+const NUM_DISPLAY_BITS: u32 = WIDTH * HEIGHT / 8;
+
+
+/// Epd7in5bc (V3) driver
+///
+pub struct Epd7in5bc<SPI, CS, BUSY, DC, RST, DELAY> {
+    // Connection Interface
+    interface: DisplayInterface<SPI, CS, BUSY, DC, RST, DELAY>,
+    color: TriColor,
+}
+
+impl<SPI, CS, BUSY, DC, RST, DELAY> InternalWiAdditions<SPI, CS, BUSY, DC, RST, DELAY>
+    for Epd7in5bc<SPI, CS, BUSY, DC, RST, DELAY>
+where
+    SPI: Write<u8>,
+    CS: OutputPin,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayMs<u8>,
+{
+    fn init(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        // Reset the device
+        self.interface.reset(delay, 2);
+
+        self.command_with_data(spi, Command::PowerSetting, &[0x07, 0x07, 0x3F, 0x3F])?;
+        self.command(spi, Command::PowerOn)?;
+
+        self.wait_until_idle(spi, delay)?;
+
+        self.command_with_data(spi, Command::PanelSetting, &[0x0F])?;
+        self.command_with_data(spi, Command::TconResolution, &[0x03, 0x20, 0x01, 0xE0])?;
+
+        self.command_with_data(spi, Command::DualSpi, &[0x00])?;
+
+        self.command_with_data(spi, Command::VcomAndDataIntervalSetting, &[0x11, 0x07])?;
+
+        self.command_with_data(spi, Command::TconSetting, &[0x22])?;
+        self.command_with_data(spi, Command::GateSourceStart, &[0x00, 0x00, 0x00, 0x00])?;
+
+        Ok(())
+    }
+}
+
+impl<SPI, CS, BUSY, DC, RST, DELAY> WaveshareThreeColorDisplay<SPI, CS, BUSY, DC, RST, DELAY>
+    for Epd7in5bc<SPI, CS, BUSY, DC, RST, DELAY>
+where
+    SPI: Write<u8>,
+    CS: OutputPin,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayMs<u8>,
+{
+    fn update_color_frame(
+        &mut self,
+        spi: &mut SPI,
+        black: &[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.command_with_data(spi, Command::DataStartTransmissionBlackWhite, black)
+    }
+
+    fn update_chromatic_frame(
+        &mut self,
+        spi: &mut SPI,
+        chromatic: &[u8],
+    ) -> Result<(), SPI::Error> {
+        self.command_with_data(spi, Command::DataStartTransmissionChromatic, chromatic)
+    }
+}
+
+impl<SPI, CS, BUSY, DC, RST, DELAY> WaveshareDisplay<SPI, CS, BUSY, DC, RST, DELAY>
+    for Epd7in5bc<SPI, CS, BUSY, DC, RST, DELAY>
+where
+    SPI: Write<u8>,
+    CS: OutputPin,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayMs<u8>,
+{
+    type DisplayColor = TriColor;
+
+    fn new(
+        spi: &mut SPI,
+        cs: CS,
+        busy: BUSY,
+        dc: DC,
+        rst: RST,
+        delay: &mut DELAY,
+    ) -> Result<Self, SPI::Error> {
+        let interface = DisplayInterface::new(cs, busy, dc, rst);
+        let color = DEFAULT_BACKGROUND_COLOR;
+
+        let mut epd =  Epd7in5bc { interface, color };
+
+        epd.init(spi, delay)?;
+
+        Ok(epd)
+    }
+
+    fn wake_up(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        self.init(spi, delay)
+    }
+
+    fn sleep(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        // self.wait_until_idle(spi, delay)?;
+        // self.command_with_data(spi, Command::VcomAndDataIntervalSetting, &[0xF7])?;
+
+        self.command(spi, Command::PowerOff)?;
+        self.wait_until_idle(spi, delay)?;
+
+        self.command_with_data(spi, Command::DeepSleep, &[0xA5])?;
+        Ok(())
+    }
+
+    fn update_frame(
+        &mut self,
+        spi: &mut SPI,
+        buffer: &[u8],
+        delay: &mut DELAY,
+    ) -> Result<(), SPI::Error> {
+        self.wait_until_idle(spi, delay)?;
+        self.command_with_data(spi, Command::DataStartTransmissionBlackWhite, buffer)?;
+
+        self.command(spi, Command::DataStartTransmissionChromatic)?;
+        self.interface.data_x_times(spi, 0x00, WIDTH * HEIGHT / 8)?;
+
+        self.wait_until_idle(spi, delay)?;
+        Ok(())
+    }
+
+    #[allow(unused)]
+    fn update_partial_frame(
+        &mut self,
+        spi: &mut SPI,
+        buffer: &[u8],
+        x: u32,
+        y: u32,
+        width: u32,
+        height: u32,
+    ) -> Result<(), SPI::Error> {
+        unimplemented!()
+    }
+
+    fn display_frame(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        self.command(spi, Command::DisplayRefresh)?;
+        delay.delay_ms(100); // The delay here is necessary, 200uS at least!!!
+        self.wait_until_idle(spi, delay)?;
+        Ok(())
+    }
+
+    fn update_and_display_frame(
+        &mut self,
+        spi: &mut SPI,
+        buffer: &[u8],
+        delay: &mut DELAY,
+    ) -> Result<(), SPI::Error> {
+        self.update_frame(spi, buffer, delay)?;
+        self.display_frame(spi, delay)?;
+        Ok(())
+    }
+
+    fn clear_frame(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        self.wait_until_idle(spi, delay)?;
+
+        self.command(spi, Command::DataStartTransmissionBlackWhite)?;
+        self.interface.data_x_times(spi, 0xFF, WIDTH * HEIGHT / 8)?;
+
+        self.command(spi, Command::DataStartTransmissionChromatic)?;
+        self.interface.data_x_times(spi, 0x00, WIDTH * HEIGHT / 8)?;
+
+        self.command(spi, Command::DisplayRefresh)?;
+        Ok(())
+    }
+
+    fn set_background_color(&mut self, color: TriColor) {
+        self.color = color;
+    }
+
+    fn background_color(&self) -> &TriColor {
+        &self.color
+    }
+
+    fn width(&self) -> u32 {
+        WIDTH
+    }
+
+    fn height(&self) -> u32 {
+        HEIGHT
+    }
+
+    fn set_lut(
+        &mut self,
+        _spi: &mut SPI,
+        _refresh_rate: Option<RefreshLut>,
+    ) -> Result<(), SPI::Error> {
+        unimplemented!()
+    }
+
+    fn is_busy(&self) -> bool {
+        self.interface.is_busy(IS_BUSY_LOW)
+    }
+}
+
+impl<SPI, CS, BUSY, DC, RST, DELAY> Epd7in5bc<SPI, CS, BUSY, DC, RST, DELAY>
+where
+    SPI: Write<u8>,
+    CS: OutputPin,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayMs<u8>,
+{
+    fn command(&mut self, spi: &mut SPI, command: Command) -> Result<(), SPI::Error> {
+        self.interface.cmd(spi, command)
+    }
+
+    fn send_data(&mut self, spi: &mut SPI, data: &[u8]) -> Result<(), SPI::Error> {
+        self.interface.data(spi, data)
+    }
+
+    fn command_with_data(
+        &mut self,
+        spi: &mut SPI,
+        command: Command,
+        data: &[u8],
+    ) -> Result<(), SPI::Error> {
+        self.interface.cmd_with_data(spi, command, data)
+    }
+
+    fn wait_until_idle(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        while self.interface.is_busy(IS_BUSY_LOW) {
+            self.interface.cmd(spi, Command::Revision)?;
+            delay.delay_ms(20);
+        }
+        Ok(())
+    }
+}

src/lib.rs

@@ -67,6 +67,7 @@
 pub mod graphics;
 
 mod traits;
+mod command_v3;
 
 pub mod color;
 
@@ -89,6 +90,7 @@ pub mod epd5in83b_v2;
 pub mod epd7in5;
 pub mod epd7in5_hd;
 pub mod epd7in5_v2;
+pub mod epd7in5bc_v3;
 
 pub(crate) mod type_a;