LPD8806 Class Reference

Class that stores state and functions for interacting with LPD8806 LED strips. More...

#include <LPD8806.h>

Public Member Functions
	LPD8806 (uint16_t n, uint8_t dpin, uint8_t cpin)
	Instantiates a new LPD8806 class using Software SPI. More...
	LPD8806 (uint16_t n)
	Instantiates a new LPD8806 class using Hardware SPI. Can also be used to create an object where we define the number of LEDs and pins later. More...
void	begin (void)
	Activate hard/soft SPI as appropriate.
void	setPixelColor (uint16_t n, uint8_t r, uint8_t g, uint8_t b)
	Set pixel color from separate 7-bit R, G, B components. More...
void	setPixelColor (uint16_t n, uint32_t c)
	Set pixel color from 'packed' 32-bit GRB (not RGB) value. More...
void	setPixelColorRGB (uint16_t n, uint32_t c)
	Set pixel color from 'packed' 32-bit RGB value. More...
void	show (void)
	Writes all the LED data to the strip at once!
void	updatePins (uint8_t dpin, uint8_t cpin)
	Change pin assignments post-constructor, switching to software SPI. More...
void	updatePins (void)
	Change pin assignments post-constructor, switching to hardware SPI.
void	updateLength (uint16_t n)
	Change strip length, calls malloc and free! More...
uint16_t	numPixels (void)
	Retrieve number of LEDs in strip. More...
uint32_t	Color (byte, byte, byte)
	Convert separate R,G,B into combined 32-bit GRB color. More...
uint32_t	getPixelColor (uint16_t n)
	Query color from previously-set pixel (returns packed 32-bit GRB value) More...

Detailed Description

Class that stores state and functions for interacting with LPD8806 LED strips.

Constructor & Destructor Documentation

LPD8806() [1/2]

LPD8806::LPD8806	(	uint16_t	n,
		uint8_t	dpin,
		uint8_t	cpin
	)

Instantiates a new LPD8806 class using Software SPI.

Parameters

n	Number of pixels we will be addressing
dpin	Our bit-bang data pin
cpin	Our bit-bag clock pin

LPD8806() [2/2]

LPD8806::LPD8806

(

uint16_t

n

)

Instantiates a new LPD8806 class using Hardware SPI. Can also be used to create an object where we define the number of LEDs and pins later.

Parameters

n	Number of pixels we will be addressing. If not passed in make sure to call updateLength() later!

Member Function Documentation

setPixelColor() [1/2]

void LPD8806::setPixelColor	(	uint16_t	n,
		uint8_t	r,
		uint8_t	g,
		uint8_t	b
	)

Set pixel color from separate 7-bit R, G, B components.

Parameters

n	Pixel # to change (0 is first pixel)
r	Red value, 0-127
g	Green value, 0-127
b	Blue value, 0-127

setPixelColor() [2/2]

void LPD8806::setPixelColor	(	uint16_t	n,
		uint32_t	c
	)

Set pixel color from 'packed' 32-bit GRB (not RGB) value.

Parameters

n	Pixel # to change (0 is first pixel)
c	Packed color word

setPixelColorRGB()

void LPD8806::setPixelColorRGB	(	uint16_t	n,
		uint32_t	c
	)

Set pixel color from 'packed' 32-bit RGB value.

Parameters

n	Pixel # to change (0 is first pixel)
c	Packed color word

updatePins()

void LPD8806::updatePins	(	uint8_t	dpin,
		uint8_t	cpin
	)

Change pin assignments post-constructor, switching to software SPI.

Parameters

dpin	Our bit-bang data pin
cpin	Our bit-bag clock pin

updateLength()

void LPD8806::updateLength

(

uint16_t

n

)

Change strip length, calls malloc and free!

Parameters

n	New number of LEDs in strip

numPixels()

uint16_t LPD8806::numPixels

(

void

)

Retrieve number of LEDs in strip.

Returns

Number of LEDs in strip

Color()

uint32_t LPD8806::Color	(	byte	r,
		byte	g,
		byte	b
	)

Convert separate R,G,B into combined 32-bit GRB color.

Parameters

r	Red value, 0-127
g	Green value, 0-127
b	Blue value, 0-127

Returns

21-bit color value in uint32_t with red, green and blue packed

getPixelColor()

uint32_t LPD8806::getPixelColor

(

uint16_t

n

)

Query color from previously-set pixel (returns packed 32-bit GRB value)

Parameters

n	Pixel # to change (0 is first pixel)

Returns

Packed color word

---

The documentation for this class was generated from the following files:

• LPD8806.h
• LPD8806.cpp