Meadow.Foundation.Displays.Il91874

Il91874
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The IL91874 is a tri-color display controller for ePaper displays. Data is sent to the controller via SPI and supports partial screen updates.

The IL91874 is commonly paired with a 2.7" 264x176 three color ePaper display.

Sample projects available on GitHub

Code Example

MicroGraphics graphics;

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

    var display = new Il91874(
        spiBus: Device.CreateSpiBus(),
        chipSelectPin: Device.Pins.A04,
        dcPin: Device.Pins.A03,
        resetPin: Device.Pins.A02,
        busyPin: Device.Pins.A01,
        width: 176,
        height: 264);

    graphics = new MicroGraphics(display);

    return Task.CompletedTask;
}

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

    graphics.Clear();

    graphics.DrawRectangle(10, 40, 120, 60, Color.Black, true);
    graphics.DrawRectangle(20, 80, 120, 90, Color.Red, true);

    graphics.CurrentFont = new Font12x16();
    graphics.DrawText(2, 20, "Meadow F7", Color.Black);
    graphics.DrawText(30, 50, "Color", Color.Red);
    graphics.DrawText(50, 90, "Black", Color.Black);
    graphics.DrawText(50, 120, "White", Color.White);

    graphics.Show();

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To control a IL91874 from Meadow, connect the following:

IL91874	Meadow Pin
BUSY	D15
RST	D14
DC	D13
CS	D12
CLK	SCK
DIN	MOSI
GND	GND
3V3	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).