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Add Display3in7 update_partial_frame #248

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2 changes: 2 additions & 0 deletions src/epd3in7/command.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,8 @@ pub(crate) enum Command {
WriteRam = 0x24,
/// This command writes VCOM register from MCU interface
WriteVcomRegister = 0x2C,
/// This command will transfer its data to R RAM, until another command is written
WriteRamRed = 0x26,
/// This command writes LUT register from MCU interface (105 bytes),
/// which contains the content of VS [nx-LUT], TP #[nX], RP #[n]
WriteLutRegister = 0x32,
Expand Down
34 changes: 32 additions & 2 deletions src/epd3in7/constants.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// This LUT clears the whole display during updates.
#[allow(unused)]
pub(crate) const LUT_1GRAY_GC: [u8; 105] = [
0x2A, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //1
0x05, 0x2A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //2
Expand All @@ -13,7 +13,7 @@ pub(crate) const LUT_1GRAY_GC: [u8; 105] = [
0x22, 0x22, 0x22, 0x22, 0x22,
];

// This LUT updates only the pixels that have changed.
#[allow(unused)]
pub(crate) const LUT_1GRAY_DU: [u8; 105] = [
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //1
0x01, 0x2A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //2
Expand All @@ -27,3 +27,33 @@ pub(crate) const LUT_1GRAY_DU: [u8; 105] = [
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //10
0x22, 0x22, 0x22, 0x22, 0x22,
];

#[allow(unused)]
pub(crate) const LUT_4GRAY_GC: [u8; 105] = [
0x2A, 0x06, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //1
0x28, 0x06, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //2
0x20, 0x06, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //3
0x14, 0x06, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //5
0x00, 0x02, 0x02, 0x0A, 0x00, 0x00, 0x00, 0x08, 0x08, 0x02, //6
0x00, 0x02, 0x02, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //10
0x22, 0x22, 0x22, 0x22, 0x22,
];

#[allow(unused)]
pub(crate) const LUT_1GRAY_A2: [u8; 105] = [
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //1
0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //2
0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //3
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //5
0x00, 0x00, 0x03, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //6
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //10
0x22, 0x22, 0x22, 0x22, 0x22,
];
94 changes: 78 additions & 16 deletions src/epd3in7/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,29 @@ pub struct EPD3in7<SPI, BUSY, DC, RST, DELAY> {
background_color: Color,
}

impl<SPI, BUSY, DC, RST, DELAY> EPD3in7<SPI, BUSY, DC, RST, DELAY>
where
SPI: SpiDevice,
BUSY: InputPin,
DC: OutputPin,
RST: OutputPin,
DELAY: DelayNs,
{
fn reset_ram_start_end_positions(&mut self, spi: &mut SPI) -> Result<(), SPI::Error> {
self.interface.cmd_with_data(
spi,
Command::SetRamXAddressStartEndPosition,
&[0x00, 0x00, 0x17, 0x01],
)?;
self.interface.cmd_with_data(
spi,
Command::SetRamYAddressStartEndPosition,
&[0x00, 0x00, 0xDF, 0x01],
)?;
Ok(())
}
}

impl<SPI, BUSY, DC, RST, DELAY> InternalWiAdditions<SPI, BUSY, DC, RST, DELAY>
for EPD3in7<SPI, BUSY, DC, RST, DELAY>
where
Expand All @@ -64,7 +87,7 @@ where
self.interface.reset(delay, 30, 10);

self.interface.cmd(spi, Command::SwReset)?;
delay.delay_us(300000u32);
delay.delay_us(10000u32);

self.interface
.cmd_with_data(spi, Command::AutoWriteRedRamRegularPattern, &[0xF7])?;
Expand Down Expand Up @@ -101,19 +124,10 @@ where
self.interface.cmd_with_data(
spi,
Command::DisplayOption,
&[0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x4F, 0xFF, 0xFF, 0xFF, 0xFF],
&[0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF],
)?;

self.interface.cmd_with_data(
spi,
Command::SetRamXAddressStartEndPosition,
&[0x00, 0x00, 0x17, 0x01],
)?;
self.interface.cmd_with_data(
spi,
Command::SetRamYAddressStartEndPosition,
&[0x00, 0x00, 0xDF, 0x01],
)?;
self.reset_ram_start_end_positions(spi)?;

self.interface
.cmd_with_data(spi, Command::DisplayUpdateSequenceSetting, &[0xCF])?;
Expand Down Expand Up @@ -197,7 +211,6 @@ where
Ok(())
}

#[allow(unused)]
fn update_partial_frame(
&mut self,
spi: &mut SPI,
Expand All @@ -208,12 +221,61 @@ where
width: u32,
height: u32,
) -> Result<(), SPI::Error> {
todo!()
let x_start = x;
let x_end = x + width - 1;
let y_start = y;
let y_end = y + height - 1;

self.interface.cmd_with_data(
spi,
Command::SetRamXAddressStartEndPosition,
&[
(x_start & 0xFF) as u8,
((x_start >> 8) & 0x03) as u8,
(x_end & 0xFF) as u8,
((x_end >> 8) & 0x03) as u8,
],
)?;
self.interface.cmd_with_data(
spi,
Command::SetRamYAddressStartEndPosition,
&[
(y_start & 0xFF) as u8,
((y_start >> 8) & 0x03) as u8,
(y_end & 0xFF) as u8,
((y_end >> 8) & 0x03) as u8,
],
)?;

self.interface.cmd_with_data(
spi,
Command::SetRamXAddressCounter,
&[(x_start & 0xFF) as u8, ((x_start >> 8) & 0x03) as u8],
)?;
self.interface.cmd_with_data(
spi,
Command::SetRamYAddressCounter,
&[(y_start & 0xFF) as u8, ((y_start >> 8) & 0x03) as u8],
)?;

self.interface
.cmd_with_data(spi, Command::WriteRam, buffer)?;

self.set_lut(spi, delay, Some(RefreshLut::Quick))?;
self.interface
.cmd_with_data(spi, Command::DisplayUpdateSequenceSetting, &[0xCF])?;
self.interface.cmd(spi, Command::DisplayUpdateSequence)?;
self.interface.wait_until_idle(delay, IS_BUSY_LOW);

self.reset_ram_start_end_positions(spi)?;

Ok(())
}

fn display_frame(&mut self, spi: &mut SPI, delay: &mut DELAY) -> Result<(), SPI::Error> {
//self.interface
// .cmd_with_data(spi, Command::WRITE_LUT_REGISTER, &LUT_1GRAY_GC)?;
self.set_lut(spi, delay, Some(RefreshLut::Full))?;
self.interface
.cmd_with_data(spi, Command::DisplayUpdateSequenceSetting, &[0xC7])?;
self.interface.cmd(spi, Command::DisplayUpdateSequence)?;
self.interface.wait_until_idle(delay, IS_BUSY_LOW);
Ok(())
Expand Down
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