Component: RGB LED SK6812 RGBW (LEDs)

Author	Matrix TSL
Version	1.5
Category	LEDs

RGB LED SK6812 RGBW component

A simple chained RGBW LED controller IC allowing multiple LEDs to be controlled using a serial data stream. Compatible with the SK6812 RGBW Type Controller ICs. Allows RGBW LEDs to be driven with full 24-bit colour depth plus 8-bit white channel. Allows single chains, 2D arrays and 3D cube formations to be simulated. Requires a high speed microcontroller to generate the critical timings to drive the device.

Detailed description

No detailed description exists yet for this component

Examples

LEDs can be wired either active high or active low. The LED components should each have a property allowing you to configure which LED type your using.

An active high LED will light when the microcontroller pin is outputting a logic 1 and be off when the microcontroller pin is outputting a logic 0 or in input mode.

An active low LED will light when the microcontroller pin is outputting a logic 0 and be off when the microcontroller pin is outputting a logic 1 or in input mode.

The series resistor can be on either side of the LED and acts to protect the LED from damage due to excess current. The value of resistor used can be changed based on the brightness of the LED and power consumption.

This LED Calculator tool is a good resource for calculating the correct LED series protection resistor.

LED Resistor Calculator Tool

Downloadable macro reference

	SetBrightness
Allows the output colour brightness of the LEDs to be scaled down. For example to save current usage or to reduce brightness in dark environments.
- FLOAT	Scaler
Range: 0.0 to 1.0 Default: 1.0, 0 = Off, 0.5 = Half Brightness, 1.0 = Full Brightness
- VOID	Return

	GetLEDColour
Sets the colour of a single LED in RAM as a 1D array.
- UINT	LED
LED to change the colour / Range: 0 to (LED Count - 1)
- BYTE	ColIdx
0 = Red, 1 = Green, 2 = Blue, 3 = White
- BYTE	Return

	OutputLow
- VOID	Return

	SetBrightnessByte
Allows the output colour brightness of the LEDs to be scaled down. For example to save current usage or to reduce brightness in dark environments.
- BYTE	Scaler
Range: 0 to 255 Default: 255, 0 = Off, 128 = Half Brightness, 255 = Full Brightness
- VOID	Return

	Delay_T0L
- VOID	Return

	DrawLine2D
Draws a line on a 2D array of LEDs
- UINT	X1
Start X Coordinate
- UINT	Y1
Start Y Coordinate
- UINT	X2
End X Coordinate
- UINT	Y2
End Y Coordinate
- BYTE	R
Red colour channel
- BYTE	G
Green colour channel
- BYTE	B
Blue colour channel
- BYTE	W
White colour channel
- VOID	Return

	OutputHigh
- VOID	Return

	SetLEDColour
Sets the colour of a single LED in RAM as a 1D array.
- UINT	LED
LED to change the colour / Range: 0 to (LED Count - 1)
- BYTE	R
Red Colour Channel
- BYTE	G
Green Colour Channel
- BYTE	B
Blue Colour Channel
- BYTE	W
White Colour Channel
- VOID	Return

	SetAllLEDColour
Sets the colour of all the LEDs in RAM
- BYTE	R
Red Colour Channel
- BYTE	G
Green Colour Channel
- BYTE	B
Blue Colour Channel
- BYTE	W
White colour channel
- VOID	Return

	Delay_T0H
- VOID	Return

	Delay_T1L
- VOID	Return

	Refresh
Clocks out the current colour data to the LEDs from the values stored in RAM
- VOID	Return

	ShiftLEDs1D
Shifts the LED colours in 1D and wraps
- BYTE	Direction
0 = Forwards, 1 = Backwards
- BYTE	DataMode
0=ResetToZero, 1=WrapAroundDisplay, 2=Smear
- VOID	Return

	DrawLine3D
Draws a line on a 3D array of LEDs
- UINT	X1
Start X Coordinate
- UINT	Y1
Start Y Coordinate
- UINT	Z1
Start Z Coordinate
- UINT	X2
End X Coordinate
- UINT	Y2
End Y Coordinate
- UINT	Z2
End Z Coordinate
- BYTE	R
Red Colour Channel
- BYTE	G
Green Colour Channel
- BYTE	B
Blue Colour Channel
- BYTE	W
White Colour Channel
- VOID	Return

	Delay_T1H
- VOID	Return

	GetLEDIndex2D
Sets the index of a single LED in RAM as a 2D array.
- UINT	X
LED Column to change the colour / Range: 0 to (LED Column - 1)
- UINT	Y
LED Row to change the colour / Range: 0 to (LED Row - 1)
- UINT	Return

	DrawRectangle2D
Draws a basic 2D rectangle onto the LEDs
- BYTE	X1
- BYTE	Y1
- BYTE	X2
- BYTE	Y2
- BYTE	DrawStyle
Sets the draw style - 0=Soild, 1=Edge, 2=Corners
- BYTE	R
- BYTE	G
- BYTE	B
- BYTE	W
White Colour Channel
- VOID	Return

	ShiftLEDs2D
Shifts the contents of the display by the number of vertices specified ***Please Note that Wrap mode is currently unavailable***
- INT	X
Number of pixels to shift the display -1 to 1 / 0 = No Shift
- INT	Y
Number of pixels to shift the display -1 to 1 / 0 = No Shift
- BYTE	DataMode
0=ResetToZero, 1=WrapAroundDisplay, 2=Smear
- VOID	Return

	GetLEDIndex3D
Gets the index of a single LED in RAM as a 3D array.
- UINT	X
LED Column to change the colour / Range: 0 to (LED Column - 1)
- UINT	Y
LED Row to change the colour / Range: 0 to (LED Row - 1)
- UINT	Z
LED Layer to change the colour / Range: 0 to (LED Layer - 1)
- UINT	Return

	DrawCuboid3D
Draws a basic 3D cuboid onto the LEDs
- BYTE	X1
Start X pixel coordinate
- BYTE	Y1
Start Y pixel coordinate
- BYTE	Z1
Start Z pixel coordinate
- BYTE	X2
End X pixel coordinate
- BYTE	Y2
End Y pixel coordinate
- BYTE	Z2
End Z pixel coordinate
- BYTE	DrawStyle
Sets the draw style - 0=Soild, 1=Edge, 2=Corners
- BYTE	R
Red Colour Channel
- BYTE	G
Green Colour Channel
- BYTE	B
White Colour Channel
- BYTE	W
White Colour Channel
- VOID	Return

	Initialise
Inisialises the RGB colour RAM to 0,0,0 = LED Off and clocks out the data to initialise all the LED ICs in the chain.
- VOID	Return

	ShiftLEDs3D
Shifts the contents of the display by the number of vertices specified ***Please Note that Wrap mode is currently unavailable***
- INT	X
Number of pixels to shift the display -1 to 1 / 0 = No Shift
- INT	Y
Number of pixels to shift the display -1 to 1 / 0 = No Shift
- INT	Z
Number of pixels to shift the display -1 to 1 / 0 = No Shift
- BYTE	DataMode
0=ResetToZero, 1=WrapAroundDisplay, 2=Smear
- VOID	Return

Property reference

	Properties
	LED Controller
Allows the user to select which LED controller IC they are using. The different controller ICs all work the same way but have different timing characteristics.
	Data Order
Configures the order the colour data is clocked out to the LEDs
	Reset Time (uS)
Blanking reset period to reset the LED shift chain and start from the beginning
	T0H (uS)
Logic 0 high time in microseconds
	T0L (uS)
Logic 0 low time in microseconds
	T1H (uS)
Logic 1 high time in microseconds
	T1L (uS)
Logic 1 low time in microseconds
	LED Arrangement
Controls the arrangement of the LEDs on the panel. 1D - Creates a straight line of LEDs 2D - Creates an X by Y Array of LEDs 3D - Creates an X by Y by Z Array of LEDs
	LED Count
Total number of LEDs in the design
	Arrangement
LEDs will likely be arranged in one of two ways. Parallel = Each row of LEDs run from left to right - easier to address but harder to wire. Alternating = Each row of LEDs runs in an alternating direction - harder to address but easier to wire.
	Column Count
Number of horizontal LEDs - X axis
	Column Spacing
X Spacing Between LEDs on the Panel
	Row Count
Number of vertical LEDs - Y axis
	Row Spacing
Y Spacing Between LEDs on the Panel
	Layer Count
Number of LED layers - Z axis
	Layer Spacing
Z Spacing Between LEDs on the Panel
	Flip X
Flips the X axis if the LEDs are wired from the right hand side of the display.
	Flip Y
Flips the Y axis if the LEDs are wired from the under side of the display.
	Flip Z
Flips the X axis if the LEDs are wired from the upper most side of the display.
	Connections
	Data Pin
LED Data Pin - Connected to the Data In pin of the first WS821x IC.
	Simulations