add: driver for epd7in3e

Author: QuentinLeeWeber

src/epd7in3e/command.rs

@@ -0,0 +1,44 @@
+use crate::traits;
+
+#[allow(dead_code, clippy::upper_case_acronyms)]
+#[derive(Clone, Copy, Debug)]
+pub(crate) enum Command {
+    Ox00 = 0x00,
+    Ox01 = 0x01,
+
+    PowerOff = 0x02,
+
+    Ox03 = 0x03,
+
+    PowerOn = 0x04,
+
+    Ox05 = 0x05,
+    Ox06 = 0x06,
+
+    DeepSleep = 0x07,
+
+    Ox08 = 0x08,
+
+    DataStartTransmission = 0x10,
+
+    DataFresh = 0x12,
+
+    Ox30 = 0x30,
+
+    Ox50 = 0x50,
+    Ox60 = 0x60,
+    Ox61 = 0x61,
+
+    Ox84 = 0x84,
+
+    CMDH = 0xAA,
+
+    OxE3 = 0xE3,
+}
+
+impl traits::Command for Command {
+    /// Returns the address of the command
+    fn address(self) -> u8 {
+        self as u8
+    }
+}

src/epd7in3e/mod.rs

@@ -0,0 +1,271 @@
+//! A simple Driver for the Waveshare 7.3inch e-Paper HAT (E) Display via SPI
+//!
+//! # References
+//!
+//! - [Datasheet](https://www.waveshare.com/wiki/7.3inch_e-Paper_HAT_(E))
+//! - [Waveshare Python driver](https://github.com/waveshareteam/e-Paper/blob/8be47b27f1a6808fd82ea9ceeac04c172e4ee9a8/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd7in3e.py)
+
+use embedded_hal::{
+    delay::DelayNs,
+    digital::{InputPin, OutputPin},
+    spi::SpiDevice,
+};
+
+use crate::{
+    buffer_len,
+    color::OctColor,
+    interface::DisplayInterface,
+    traits::{InternalWiAdditions, WaveshareDisplay},
+};
+
+use self::command::Command;
+
+mod command;
+
+/// Full size buffer for use with the 7in3e EPD
+#[cfg(feature = "graphics")]
+pub type Display7in3e = crate::graphics::Display<
+    WIDTH,
+    HEIGHT,
+    false,
+    { buffer_len(WIDTH as usize, HEIGHT as usize * 4) },
+    OctColor,
+>;
+
+/// Width of the display
+pub const WIDTH: u32 = 800;
+/// Height of the display
+pub const HEIGHT: u32 = 480;
+/// Default Background Color
+pub const DEFAULT_BACKGROUND_COLOR: OctColor = OctColor::White;
+/// Default mode of writing data (single byte vs blockwise)
+const SINGLE_BYTE_WRITE: bool = true;
+
+/// Epd7in3e driver
+pub struct Epd7in3e<SPI, BUSY, DC, RST, DELAY> {
+    /// Connection Interface
+    interface: DisplayInterface<SPI, BUSY, DC, RST, DELAY, SINGLE_BYTE_WRITE>,
+    /// Background Color
+    color: OctColor,
+}
+
+impl<SPI, BUSY, DC, RST, DELAY> InternalWiAdditions<SPI, BUSY, DC, RST, DELAY>
+    for Epd7in3e<SPI, BUSY, DC, RST, DELAY>
+where
+    SPI: SpiDevice,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayNs,
+{
+    fn init(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), <SPI>::Error> {
+        self.interface.reset(delay, 20_000, 2_000);
+        self.wait_busy_low(delay);
+        delay.delay_ms(30);
+
+        self.cmd_with_data(spi, Command::CMDH, &[0x49, 0x55, 0x20, 0x08, 0x09, 0x18])?;
+        self.cmd_with_data(spi, Command::Ox01, &[0x3F])?;
+        self.cmd_with_data(spi, Command::Ox00, &[0x5F, 0x69])?;
+        self.cmd_with_data(spi, Command::Ox03, &[0x00, 0x54, 0x00, 0x44])?;
+        self.cmd_with_data(spi, Command::Ox05, &[0x40, 0x1F, 0x1F, 0x2C])?;
+        self.cmd_with_data(spi, Command::Ox06, &[0x6F, 0x1F, 0x17, 0x49])?;
+        self.cmd_with_data(spi, Command::Ox08, &[0x6F, 0x1F, 0x1F, 0x22])?;
+        self.cmd_with_data(spi, Command::Ox30, &[0x03])?;
+        self.cmd_with_data(spi, Command::Ox50, &[0x3F])?;
+        self.cmd_with_data(spi, Command::Ox60, &[0x02, 0x00])?;
+        self.cmd_with_data(spi, Command::Ox61, &[0x03, 0x20, 0x01, 0xE0])?;
+        self.cmd_with_data(spi, Command::Ox84, &[0x01])?;
+        self.cmd_with_data(spi, Command::OxE3, &[0x2F])?;
+        self.wait_busy_low(delay);
+
+        Ok(())
+    }
+}
+
+impl<SPI, BUSY, DC, RST, DELAY> WaveshareDisplay<SPI, BUSY, DC, RST, DELAY>
+    for Epd7in3e<SPI, BUSY, DC, RST, DELAY>
+where
+    SPI: SpiDevice,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayNs,
+{
+    type DisplayColor = OctColor;
+
+    fn new(
+        spi: &mut SPI,
+        busy: BUSY,
+        dc: DC,
+        rst: RST,
+        delay: &mut DELAY,
+        delay_us: Option<u32>,
+    ) -> Result<Self, <SPI>::Error>
+    where
+        Self: Sized,
+    {
+        let interface = DisplayInterface::new(busy, dc, rst, delay_us);
+        let color = DEFAULT_BACKGROUND_COLOR;
+
+        let mut epd = Epd7in3e { interface, color };
+
+        epd.init(spi, delay)?;
+
+        Ok(epd)
+    }
+
+    fn sleep(&mut self, spi: &mut SPI, _delay: &mut DELAY) -> Result<(), <SPI>::Error> {
+        self.cmd_with_data(spi, Command::DeepSleep, &[0xA5])
+    }
+
+    fn wake_up(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), <SPI>::Error> {
+        self.init(spi, delay)
+    }
+
+    fn set_background_color(&mut self, color: Self::DisplayColor) {
+        self.color = color;
+    }
+
+    fn background_color(&self) -> &Self::DisplayColor {
+        &self.color
+    }
+
+    fn width(&self) -> u32 {
+        WIDTH
+    }
+
+    fn height(&self) -> u32 {
+        HEIGHT
+    }
+
+    fn update_frame(
+        &mut self,
+        spi: &mut SPI,
+        buffer: &[u8],
+        delay: &mut DELAY,
+    ) -> Result<(), <SPI>::Error> {
+        self.wait_until_idle(spi, delay)?;
+        self.cmd_with_data(spi, Command::DataStartTransmission, buffer)
+    }
+
+    fn update_partial_frame(
+        &mut self,
+        _spi: &mut SPI,
+        _delay: &mut DELAY,
+        _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::PowerOn)?;
+        self.wait_busy_low(delay);
+
+        self.cmd_with_data(spi, Command::DataFresh, &[0x00])?;
+        self.wait_busy_low(delay);
+
+        self.cmd_with_data(spi, Command::PowerOff, &[0x00])?;
+        self.wait_busy_low(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)
+    }
+
+    fn clear_frame(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), <SPI>::Error> {
+        let bg = OctColor::colors_byte(self.color, self.color);
+
+        self.wait_busy_low(delay);
+        self.command(spi, Command::DataStartTransmission)?;
+        self.interface.data_x_times(spi, bg, WIDTH * HEIGHT / 2)?;
+
+        self.display_frame(spi, delay)
+    }
+
+    fn set_lut(
+        &mut self,
+        _spi: &mut SPI,
+        _delay: &mut DELAY,
+        _refresh_rate: Option<crate::traits::RefreshLut>,
+    ) -> Result<(), <SPI>::Error> {
+        unimplemented!()
+    }
+
+    fn wait_until_idle(&mut self, _spi: &mut SPI, delay: &mut DELAY) -> Result<(), <SPI>::Error> {
+        self.wait_busy_low(delay);
+        Ok(())
+    }
+}
+
+impl<SPI, BUSY, DC, RST, DELAY> Epd7in3e<SPI, BUSY, DC, RST, DELAY>
+where
+    SPI: SpiDevice,
+    BUSY: InputPin,
+    DC: OutputPin,
+    RST: OutputPin,
+    DELAY: DelayNs,
+{
+    fn command(&mut self, spi: &mut SPI, command: Command) -> Result<(), SPI::Error> {
+        self.interface.cmd(spi, command)
+    }
+
+    fn cmd_with_data(
+        &mut self,
+        spi: &mut SPI,
+        command: Command,
+        data: &[u8],
+    ) -> Result<(), SPI::Error> {
+        self.interface.cmd_with_data(spi, command, data)
+    }
+
+    fn wait_busy_low(&mut self, delay: &mut DELAY) {
+        self.interface.wait_until_idle(delay, true);
+    }
+
+    /// Show 7 blocks of color, used for quick testing
+    pub fn show_7block(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
+        let color_7 = [
+            OctColor::Black,
+            OctColor::White,
+            OctColor::Green,
+            OctColor::Blue,
+            OctColor::Red,
+            OctColor::Yellow,
+            OctColor::Orange,
+            OctColor::White,
+        ];
+
+        self.command(spi, Command::DataStartTransmission)?;
+        for _ in 0..240 {
+            for color in color_7.iter().take(4) {
+                for _ in 0..100 {
+                    self.interface
+                        .data(spi, &[OctColor::colors_byte(*color, *color)])?;
+                }
+            }
+        }
+
+        for _ in 0..240 {
+            for color in color_7.iter().skip(4) {
+                for _ in 0..100 {
+                    self.interface
+                        .data(spi, &[OctColor::colors_byte(*color, *color)])?;
+                }
+            }
+        }
+
+        self.display_frame(spi, delay)
+    }
+}

src/lib.rs

@@ -97,6 +97,7 @@ pub mod epd4in2;
 pub mod epd5in65f;
 pub mod epd5in83_v2;
 pub mod epd5in83b_v2;
+pub mod epd7in3e;
 pub mod epd7in3f;
 pub mod epd7in5;
 pub mod epd7in5_hd;