Remarks

Il91874V03
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The IL91874V3 is a tri-color display controller for ePaper displays. Data is sent to the controller via SPI and supports partial screen updates.

The IL91874V3 is paired with a wide range of three color ePaper display sizes and resolutions.

Sample projects available on GitHub

Code Example

MicroGraphics graphics;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize ...");

    var display = new Il91874V03(
        spiBus: Device.CreateSpiBus(),
        chipSelectPin: Device.Pins.D02,
        dcPin: Device.Pins.D01,
        resetPin: Device.Pins.D00,
        busyPin: Device.Pins.D03,
        width: 176,
        height: 264);

    graphics = new MicroGraphics(display);

    return base.Initialize();
}

public override Task Run()
{
    graphics.DrawRectangle(1, 1, 126, 32, Meadow.Foundation.Color.Red, false);

    graphics.CurrentFont = new Font8x12();
    graphics.DrawText(2, 2, "IL91874V03", Meadow.Foundation.Color.Black);
    graphics.DrawText(2, 20, "Meadow F7", Meadow.Foundation.Color.Black);

    graphics.Show();

    return Task.CompletedTask;
}

Sample project(s) available on GitHub

Wiring Example

To control a IL91874V3 from Meadow, connect the following:

Il91874V03	Meadow Pin
BUSY	D15
RST	D14
DC	D13
CS	D12
CLK	SCK
DIN	MOSI
GND	GND
VCC	3V3

If your display does not include any of the above pins, they can be omitted. Pass NULL into the constructor for the missing pin(s).

Characteristic	Locus
Inheritance	System.Object EPaperBase EPaperMonoBase > Il91874V03
Implements	IGraphicsDisplay
Inherited Members	EPaperMonoBase.ColorMode EPaperMonoBase.SupportedColorModes EPaperMonoBase.PixelBuffer EPaperMonoBase.EnabledColor EPaperMonoBase.DisabledColor EPaperMonoBase.imageBuffer EPaperMonoBase.Width EPaperMonoBase.Height EPaperMonoBase.Clear(Boolean) EPaperMonoBase.Fill(Color, Boolean) EPaperMonoBase.Fill(Int32, Int32, Int32, Int32, Color) EPaperMonoBase.Clear(Boolean, Boolean) EPaperMonoBase.DrawPixel(Int32, Int32, Boolean) EPaperMonoBase.DrawPixel(Int32, Int32, Color) EPaperMonoBase.InvertPixel(Int32, Int32) EPaperMonoBase.Show(Int32, Int32, Int32, Int32) EPaperMonoBase.Show() EPaperMonoBase.WriteBuffer(Int32, Int32, IPixelBuffer) EPaperMonoBase.Sleep() EPaperMonoBase.SendCommand(EPaperMonoBase.Command) EPaperBase.commandBuffer EPaperBase.dataCommandPort EPaperBase.resetPort EPaperBase.chipSelectPort EPaperBase.busyPort EPaperBase.spiPeripheral EPaperBase.DataState EPaperBase.CommandState EPaperBase.Write(Byte) EPaperBase.Reset() EPaperBase.DelayMs(Int32) EPaperBase.SendCommand(Byte) EPaperBase.SendData(Int32) EPaperBase.SendData(Byte) EPaperBase.SendData(Byte[]) EPaperBase.WaitUntilIdle()
Namespace	Meadow.Foundation.Displays
Assembly	EPaper.dll

Syntax

public class Il91874V03 : EPaperMonoBase, IGraphicsDisplay

Constructors

Il91874V03(ISpiBus, IDigitalOutputPort, IDigitalOutputPort, IDigitalOutputPort, IDigitalInputPort, Int32, Int32)

Create a new Il91874V03 ePaper display object

Declaration

public Il91874V03(ISpiBus spiBus, IDigitalOutputPort chipSelectPort, IDigitalOutputPort dataCommandPort, IDigitalOutputPort resetPort, IDigitalInputPort busyPort, int width, int height)

Parameters

Type	Name	Description
ISpiBus	spiBus	SPI bus connected to display
IDigitalOutputPort	chipSelectPort	Chip select output port
IDigitalOutputPort	dataCommandPort	Data command output port
IDigitalOutputPort	resetPort	Reset output port
IDigitalInputPort	busyPort	Busy input port
System.Int32	width	Width of display in pixels
System.Int32	height	Height of display in pixels

Il91874V03(ISpiBus, IPin, IPin, IPin, IPin, Int32, Int32)

Create a new Il91874V03 object

Declaration

public Il91874V03(ISpiBus spiBus, IPin chipSelectPin, IPin dcPin, IPin resetPin, IPin busyPin, int width = 176, int height = 264)

Parameters

Type	Name	Description
ISpiBus	spiBus	SPI bus connected to display
IPin	chipSelectPin	Chip select pin
IPin	dcPin	Data command pin
IPin	resetPin	Reset pin
IPin	busyPin	Busy pin
System.Int32	width	Width of display in pixels
System.Int32	height	Height of display in pixels

Methods

ClearFrame()

Clears the SRAM on the display controller Doesn't update the display

Declaration

public void ClearFrame()

DisplayFrame()

Display data from the display controller SRAM

Declaration

public override void DisplayFrame()

Overrides

EPaperMonoBase.DisplayFrame()

Initialize()

Initalize the display

Declaration

protected override void Initialize()

Overrides

EPaperMonoBase.Initialize()

SetFrameMemory(Byte[])

Set frame buffer memory of display (full screen)

Declaration

public override void SetFrameMemory(byte[] buffer)

Parameters

Type	Name	Description
System.Byte[]	buffer	The image buffer

Overrides

EPaperMonoBase.SetFrameMemory(Byte[])

SetFrameMemory(Byte[], Int32, Int32, Int32, Int32)

Set frame buffer memory of display

Declaration

public override void SetFrameMemory(byte[] buffer, int x, int y, int width, int height)

Parameters

Type	Name	Description
System.Byte[]	buffer	buffer
System.Int32	x	x location
System.Int32	y	y location
System.Int32	width	width in pixels
System.Int32	height	height in pixels

Overrides

EPaperMonoBase.SetFrameMemory(Byte[], Int32, Int32, Int32, Int32)