Remarks

Gc9a01
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

MicroGraphics graphics;

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

    var config = new SpiClockConfiguration(new Frequency(12000, Frequency.UnitType.Kilohertz), SpiClockConfiguration.Mode.Mode0);
    var spiBus = Device.CreateSpiBus(Device.Pins.SCK, Device.Pins.MOSI, Device.Pins.MISO, config);

    Resolver.Log.Info("Create display driver instance");

    var display = new Gc9a01
    (
        spiBus: spiBus,
        chipSelectPin: Device.Pins.D02,
        dcPin: Device.Pins.D01,
        resetPin: Device.Pins.D00
    );

    graphics = new MicroGraphics(display)
    {
        IgnoreOutOfBoundsPixels = true,
        CurrentFont = new Font12x20()
    };

    return base.Initialize();
}

public override Task Run()
{
    graphics.Clear();
    graphics.DrawTriangle(10, 10, 50, 50, 10, 50, Meadow.Foundation.Color.Red);
    graphics.DrawRectangle(20, 15, 40, 20, Meadow.Foundation.Color.Yellow, false);
    graphics.DrawCircle(50, 50, 40, Meadow.Foundation.Color.Blue, false);
    graphics.DrawText(5, 5, "Meadow F7");
    graphics.Show();

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a Gc9a01 to your Meadow board, connect the following:

Gc9a01	Meadow Pin
GND	GND
VCC	3V3
SCL	SCK
SDA	MOSI
CS	D02
DC	D01
RESET	D00

It should look like the following diagram:

Characteristic	Locus
Inheritance	System.Object TftSpiBase > Gc9a01
Implements	IGraphicsDisplay IRotatableDisplay
Inherited Members	TftSpiBase.ColorMode TftSpiBase.Rotation TftSpiBase.Width TftSpiBase.Height TftSpiBase.PixelBuffer TftSpiBase.dataCommandPort TftSpiBase.resetPort TftSpiBase.chipSelectPort TftSpiBase.spiDisplay TftSpiBase.imageBuffer TftSpiBase.readBuffer TftSpiBase.Data TftSpiBase.Command TftSpiBase.IsColorTypeSupported(ColorMode) TftSpiBase.CreateBuffer(ColorMode, Int32, Int32) TftSpiBase.Clear(Boolean) TftSpiBase.Fill(Color, Boolean) TftSpiBase.WriteBuffer(Int32, Int32, IPixelBuffer) TftSpiBase.DrawPixel(Int32, Int32, Boolean) TftSpiBase.DrawPixel(Int32, Int32, Color) TftSpiBase.DrawPixel(Int32, Int32, Byte, Byte, Byte) TftSpiBase.InvertPixel(Int32, Int32) TftSpiBase.Fill(Int32, Int32, Int32, Int32, Color) TftSpiBase.Show() TftSpiBase.Show(Int32, Int32, Int32, Int32) TftSpiBase.Write(Byte) TftSpiBase.Write(Byte[]) TftSpiBase.DelayMs(Int32) TftSpiBase.SendCommand(TftSpiBase.Register) TftSpiBase.SendCommand(TftSpiBase.LcdCommand) TftSpiBase.SendCommand(Byte) TftSpiBase.SendData(Int32) TftSpiBase.SendData(Byte) TftSpiBase.SendData(Byte[]) TftSpiBase.Clear(Color)
Namespace	Meadow.Foundation.Displays
Assembly	TftSpi.dll

Syntax

public class Gc9a01 : TftSpiBase, IGraphicsDisplay, IRotatableDisplay

Constructors

Gc9a01(ISpiBus, IDigitalOutputPort, IDigitalOutputPort, IDigitalOutputPort)

Create a new Gc9a01 color display object

Declaration

public Gc9a01(ISpiBus spiBus, IDigitalOutputPort chipSelectPort, IDigitalOutputPort dataCommandPort, IDigitalOutputPort resetPort)

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

Gc9a01(ISpiBus, IPin, IPin, IPin)

Create a new Gc9a01 color display object

Declaration

public Gc9a01(ISpiBus spiBus, IPin chipSelectPin, IPin dcPin, IPin resetPin)

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

Properties

DefautColorMode

The display default color mode

Declaration

public override ColorMode DefautColorMode { get; }

Property Value

Type	Description
ColorMode

Overrides

TftSpiBase.DefautColorMode

SupportedColorModes

The color modes supported by the display

Declaration

public override ColorMode SupportedColorModes { get; }

Property Value

Type	Description
ColorMode

Overrides

TftSpiBase.SupportedColorModes

Methods

Initialize()

Initialize the display

Declaration

protected override void Initialize()

Overrides

TftSpiBase.Initialize()

SetAddressWindow(Int32, Int32, Int32, Int32)

Set address window to update

Declaration

protected override void SetAddressWindow(int x0, int y0, int x1, int y1)

Parameters

Type	Name	Description
System.Int32	x0	Start x position in pixels
System.Int32	y0	End x position in pixels
System.Int32	x1	Start y position in pixels
System.Int32	y1	End y position in pixels

Overrides

TftSpiBase.SetAddressWindow(Int32, Int32, Int32, Int32)

SetRotation(RotationType)

Set the rotation of the display

Declaration

public void SetRotation(RotationType rotation)

Parameters

Type	Name	Description
RotationType	rotation	The rotation