Meadow.Foundation.Displays.St7735

St7735
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The ST7735 is a display controller used to drive color displays over SPI using 12, 16 or 18 bbp. These displays require a backlight. These displays are commonly found with a resolution of 128x160.

The Meadow.Foundation ST7735 driver currently only supports 16bpp RGB565.

Code Example

MicroGraphics graphics;

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

    var spiBus = Device.CreateSpiBus();

    //note - you may need to adjust the DisplayType for your specific St7735
    var display = new St7735(
        spiBus: spiBus,
        chipSelectPin: Device.Pins.D02,
        dcPin: Device.Pins.D01,
        resetPin: Device.Pins.D00,
        width: 128,
        height: 160,
        St7735.DisplayType.ST7735R);

    graphics = new MicroGraphics(display);

    return base.Initialize();
}

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

    graphics.DrawCircle(60, 60, 20, Color.Purple);
    graphics.DrawRectangle(10, 10, 30, 60, Color.Red);
    graphics.DrawTriangle(20, 20, 10, 70, 60, 60, Color.Green);

    graphics.DrawCircle(90, 60, 20, Color.Cyan, true);
    graphics.DrawRectangle(100, 100, 30, 10, Color.Yellow, true);
    graphics.DrawTriangle(120, 20, 110, 70, 160, 60, Color.Pink, true);

    graphics.DrawLine(10, 120, 110, 130, Color.SlateGray);

    graphics.Show();

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a ST7735 to your Meadow board, connect the following:

ST7735	Meadow Pin
LED-	3V3
LED+	GND
MOSI	MOSI
SCK	SCK
RESET	D15
A0	D14
CS	D13
VCC	3V3
GND	GND

It should look like the following diagram: