Remarks

Hx8357b
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 Hx8357b(
        spiBus: spiBus,
        chipSelectPin: Device.Pins.D02,
        dcPin: Device.Pins.D01,
        resetPin: Device.Pins.D00,
        width: 320, height: 480, colorMode: ColorMode.Format16bppRgb565);

    graphics = new MicroGraphics(display);
    graphics.IgnoreOutOfBoundsPixels = true;

    return base.Initialize();
}

public override Task Run()
{
    graphics.Clear();

    graphics.DrawRectangle(120, 0, 120, 220, Color.White, true);
    graphics.DrawRectangle(0, 0, 120, 20, Color.Red, true);
    graphics.DrawRectangle(0, 20, 120, 20, Color.Purple, true);
    graphics.DrawRectangle(0, 40, 120, 20, Color.Blue, true);
    graphics.DrawRectangle(0, 60, 120, 20, Color.Green, true);
    graphics.DrawRectangle(0, 80, 120, 20, Color.Yellow, true);
    graphics.DrawRectangle(0, 120, 120, 20, Color.Orange, true);

    graphics.Show();

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a Hx8357b to your Meadow board, connect the following:

Hx8357b	Meadow Pin
GND	GND
VCC	3V3
SCL	SCK
SDA	MOSI
RESET	D00
DC	D01
CS	D02

It should look like the following diagram:

Characteristic	Locus
Inheritance	System.Object TftSpiBase Hx8357d > Hx8357b
Implements	IGraphicsDisplay IRotatableDisplay
Inherited Members	Hx8357d.DefautColorMode Hx8357d.SupportedColorModes Hx8357d.SetAddressWindow(Int32, Int32, Int32, Int32) Hx8357d.SetRotation(RotationType) 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 Hx8357b : Hx8357d, IGraphicsDisplay, IRotatableDisplay

Constructors

Hx8357b(ISpiBus, IDigitalOutputPort, IDigitalOutputPort, IDigitalOutputPort, Int32, Int32, ColorMode)

Create a new Hx8357b color display object

Declaration

public Hx8357b(ISpiBus spiBus, IDigitalOutputPort chipSelectPort, IDigitalOutputPort dataCommandPort, IDigitalOutputPort resetPort, int width = 320, int height = 480, ColorMode colorMode = default(ColorMode))

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
System.Int32	width	Width of display in pixels
System.Int32	height	Height of display in pixels
ColorMode	colorMode	The color mode to use for the display buffer

Hx8357b(ISpiBus, IPin, IPin, IPin, Int32, Int32, ColorMode)

Create a new Hx8357b color display object

Declaration

public Hx8357b(ISpiBus spiBus, IPin chipSelectPin, IPin dcPin, IPin resetPin, int width = 320, int height = 480, ColorMode colorMode = default(ColorMode))

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
System.Int32	width	Width of display in pixels
System.Int32	height	Height of display in pixels
ColorMode	colorMode	The color mode to use for the display buffer

Methods

Initialize()

Initialize the display

Declaration

protected override void Initialize()

Overrides

Hx8357d.Initialize()

SendCommand(Hx8357b.RegisterHX8357B)

Send a command to the display

Declaration

protected void SendCommand(Hx8357b.RegisterHX8357B command)

Parameters

Type	Name	Description
Hx8357b.RegisterHX8357B	command	The command to send