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epd2in9: partial refresh support (tested on magtag 2025 w/ SSD1680) #259

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epd2in9: partial refresh support (tested on magtag 2025 w/ SSD1680) #259

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10 changes: 8 additions & 2 deletions src/epd2in9_v2/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,7 @@ pub struct Epd2in9<SPI, BUSY, DC, RST, DELAY> {
background_color: Color,
/// Refresh LUT
refresh: RefreshLut,
partial_init: bool,
}

impl<SPI, BUSY, DC, RST, DELAY> Epd2in9<SPI, BUSY, DC, RST, DELAY>
Expand Down Expand Up @@ -204,6 +205,7 @@ where
interface,
background_color: DEFAULT_BACKGROUND_COLOR,
refresh: RefreshLut::Full,
partial_init: false,
};

epd.init(spi, delay)?;
Expand All @@ -230,6 +232,7 @@ where
buffer: &[u8],
delay: &mut DELAY,
) -> Result<(), SPI::Error> {
self.partial_init = false;
self.wait_until_idle(spi, delay)?;
self.interface.cmd_with_data(spi, Command::WriteRam, buffer)
}
Expand All @@ -244,7 +247,10 @@ where
width: u32,
height: u32,
) -> Result<(), SPI::Error> {
//TODO This is copied from epd2in9 but it seems not working. Partial refresh supported by version 2?
if !self.partial_init {
self.set_lut_helper(spi, delay, &LUT_PARTIAL_2IN9)?;
self.partial_init = true;
}
self.wait_until_idle(spi, delay)?;
self.set_ram_area(spi, x, y, x + width, y + height)?;
self.set_ram_counter(spi, delay, x, y)?;
Expand All @@ -259,7 +265,7 @@ where
self.wait_until_idle(spi, delay)?;
// Enable clock signal, Enable Analog, Load temperature value, DISPLAY with DISPLAY Mode 1, Disable Analog, Disable OSC
self.interface
.cmd_with_data(spi, Command::DisplayUpdateControl2, &[0xC7])?;
.cmd_with_data(spi, Command::DisplayUpdateControl2, &[0xCC])?;
self.interface.cmd(spi, Command::MasterActivation)?;
self.wait_until_idle(spi, delay)?;
Ok(())
Expand Down
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