Class Apa102

Represents APA102/Dotstar Led(s)

Assembly: Apa102.dll

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public class Apa102 : IApa102, ISpiPeripheral, IDisposable, IGraphicsDisplay, IPixelBuffer

Implements:
Meadow.Foundation.Leds.IApa102, Meadow.Hardware.ISpiPeripheral, System.IDisposable, Meadow.Foundation.Graphics.IGraphicsDisplay, Meadow.Foundation.Graphics.Buffers.IPixelBuffer

Properties

DefaultSpiBusSpeed

The default SPI bus speed for the device

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public Frequency DefaultSpiBusSpeed { get; }

SpiBusSpeed

The SPI bus speed for the device

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public Frequency SpiBusSpeed { get; set; }

DefaultSpiBusMode

The default SPI bus mode for the device

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public SpiClockConfiguration.Mode DefaultSpiBusMode { get; }

SpiBusMode

The SPI bus mode for the device

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public SpiClockConfiguration.Mode SpiBusMode { get; set; }

IsDisposed

Is the object disposed

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public bool IsDisposed { get; }

NumberOfLeds

Total number of leds

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public int NumberOfLeds { get; }

Brightness

Brightness used for LEDs Default is 0.5

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public float Brightness { get; set; }

ColorMode

Color mode of leds - 24bpp

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public ColorMode ColorMode { get; }

SupportedColorModes

The Color mode supported by the display

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public ColorMode SupportedColorModes { get; }

Width

Width of pixel array

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public int Width { get; }

Height

Height of pixel array

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public int Height { get; }

PixelBuffer

PixelBuffer representation of the Apa102

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public IPixelBuffer PixelBuffer { get; }

BitDepth

The color bit depth of the display

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public int BitDepth { get; }

ByteCount

The size of the display buffer in bytes

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public int ByteCount { get; }

Buffer

The display buffer - not implemented for the Apa102 driver

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public byte[] Buffer { get; }

Fields

spiComms

SPI Communication bus used to communicate with the peripheral

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protected ISpiCommunications spiComms

Methods

SetLed(int, Color)

Set the color of the specified LED using the global brightness value

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public virtual void SetLed(int index, Color color)

Parameters

Type	Name	Description
System.Int32	index	Index of the LED to change
Meadow.Color	color	The color

SetLed(int, Color, float)

Set the color of the specified LED

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public virtual void SetLed(int index, Color color, float brightness = 1)

Parameters

Type	Name	Description
System.Int32	index	Index of the LED to change
Meadow.Color	color	The color
System.Single	brightness	The brightness 0.0 - 1.0f

SetLed(int, byte[])

Set the color of the specified LED

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public virtual void SetLed(int index, byte[] rgb)

Parameters

Type	Name	Description
System.Int32	index	Index of the LED to change
System.Byte[]	rgb	Byte array representing the color RGB values. byte[0] = Red, byte[1] = Green, byte[2] = Blue

SetLed(int, byte[], float)

Set the color of the specified LED

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public virtual void SetLed(int index, byte[] rgb, float brightness = 1)

Parameters

Type	Name	Description
System.Int32	index	Index of the LED to change
System.Byte[]	rgb	Byte array representing the color RGB values. byte[0] = Red, byte[1] = Green, byte[2] = Blue
System.Single	brightness	The brightness 0.0 - 1.0f

Clear()

Clear the display buffer

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public void Clear()

Clear(bool)

Clear the display buffer

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public void Clear(bool update = false)

Parameters

Type	Name	Description
System.Boolean	update	Update the leds if true

Show()

Transmit the buffer to the LEDs

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public void Show()

Show(int, int, int, int)

Update APA102 with data in display buffer

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public void Show(int left, int top, int right, int bottom)

Parameters

Type	Name	Description
System.Int32	left	left
System.Int32	top	top
System.Int32	right	right
System.Int32	bottom	bottom

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

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public void Dispose()

Dispose(bool)

Dispose of the object

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protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	Is disposing

DrawPixel(int, int, Color)

Draw pixel at location

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public void DrawPixel(int x, int y, Color color)

Parameters

Type	Name	Description
System.Int32	x	x position of pixel
System.Int32	y	y position of pixel
Meadow.Color	color	color of pixel

DrawPixel(int, int, bool)

Draw pixel at a location Primarily used for monochrome displays, prefer overload that accepts a Color

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public void DrawPixel(int x, int y, bool enabled)

Parameters

Type	Name	Description
System.Int32	x	x position of pixel
System.Int32	y	y position of pixel
System.Boolean	enabled	if true draw white, if false draw black

InvertPixel(int, int)

Invert pixel at location

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public void InvertPixel(int x, int y)

Parameters

Type	Name	Description
System.Int32	x	x position of pixel
System.Int32	y	y position of pixel

Fill(Color, bool)

Fill the entire display buffer with a color

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public void Fill(Color clearColor, bool updateDisplay = false)

Parameters

Type	Name	Description
Meadow.Color	clearColor	color to fill
System.Boolean	updateDisplay	update after fill

Fill(int, int, int, int, Color)

Fill a color in the specified region

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public void Fill(int x, int y, int width, int height, Color fillColor)

Parameters

Type	Name	Description
System.Int32	x	x position
System.Int32	y	y position
System.Int32	width	width to fill
System.Int32	height	height to fill
Meadow.Color	fillColor	color to fill

WriteBuffer(int, int, IPixelBuffer)

Draw a buffer at the specified location

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public void WriteBuffer(int x, int y, IPixelBuffer displayBuffer)

Parameters

Type	Name	Description
System.Int32	x	x position
System.Int32	y	y position
Meadow.Foundation.Graphics.Buffers.IPixelBuffer	displayBuffer	buffer to draw

Fill(Color)

Fill the display buffer with a color

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public void Fill(Color color)

Parameters

Type	Name	Description
Meadow.Color	color	The fill color

GetPixel(int, int)

Get the color of a pixel for a given coordinate

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public Color GetPixel(int x, int y)

Returns

Meadow.Color

Parameters

Type	Name	Description
System.Int32	x	X position in pixels
System.Int32	y	Y position in pixels

SetPixel(int, int, Color)

Set the color of a pixel for a given coordinate

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public void SetPixel(int x, int y, Color color)

Parameters

Type	Name	Description
System.Int32	x	X position in pixels
System.Int32	y	Y position in pixels
Meadow.Color	color	Color of pixel

Implements

• Meadow.Foundation.Leds.IApa102
• Meadow.Hardware.ISpiPeripheral
• System.IDisposable
• Meadow.Foundation.Graphics.IGraphicsDisplay
• Meadow.Foundation.Graphics.Buffers.IPixelBuffer