Anshorei/epd-waveshare
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EPD 7in5 HD: Added more documentation

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Updated README to include the driver.
Updated CHANGELOG.
Added note about the default background color of the HD driver
This commit is contained in:
pi
2021-04-14 14:59:23 +01:00
parent 73c98d86e7
commit ba1243137d
3 changed files with 10 additions and 3 deletions
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src/epd7in5_hd/mod.rs
+8 -3
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@@ -1,5 +1,9 @@
//! A simple Driver for the Waveshare 7.5" E-Ink Display (HD) via SPI
//!
//! Color values for this driver are inverted compared to the [EPD 7in5 V2 driver](crate::epd7in5_v2)
//! *EPD 7in5 HD:* White = 1/0xFF, Black = 0/0x00
//! *EPD 7in5 V2:* White = 0/0x00, Black = 1/0xFF
//!
//! # References
//!
//! - [Datasheet](https://www.waveshare.com/w/upload/2/27/7inch_HD_e-Paper_Specification.pdf)
@@ -27,7 +31,7 @@ pub const WIDTH: u32 = 880;
/// Height of the display
pub const HEIGHT: u32 = 528;
/// Default Background Color
pub const DEFAULT_BACKGROUND_COLOR: Color = Color::Black; // Inverted for HD (0xFF = White)
pub const DEFAULT_BACKGROUND_COLOR: Color = Color::White; // Inverted for HD as compared to 7in5 v2 (HD: 0xFF = White)
const IS_BUSY_LOW: bool = false;
/// EPD7in5 (HD) driver
@@ -171,13 +175,14 @@ where
fn clear_frame(&mut self, spi: &mut SPI) -> Result<(), SPI::Error> {
let pixel_count = WIDTH * HEIGHT / 8;
let background_color_byte = self.color.get_byte_value();
self.wait_until_idle();
self.cmd_with_data(spi, Command::SET_RAM_Y_AC, &[0x00, 0x00])?;
for cmd in &[Command::WRITE_RAM_BW, Command::WRITE_RAM_RED] {
self.command(spi, *cmd)?;
self.interface.data_x_times(spi, 0xFF, pixel_count)?;
self.interface.data_x_times(spi, background_color_byte, pixel_count)?;
}
self.cmd_with_data(spi, Command::DISPLAY_UPDATE_CONTROL_2, &[0xF7])?;
@@ -249,6 +254,6 @@ mod tests {
fn epd_size() {
assert_eq!(WIDTH, 880);
assert_eq!(HEIGHT, 528);
assert_eq!(DEFAULT_BACKGROUND_COLOR, Color::Black);
assert_eq!(DEFAULT_BACKGROUND_COLOR, Color::White);
}
}