Created
May 1, 2013 04:28
-
-
Save guyc/5493729 to your computer and use it in GitHub Desktop.
The file that is currently on an Arduino Uno with a serial number of 6493234383835120E1B0
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include "LPD8806.h" | |
#include "SPI.h" | |
// Example to control LPD8806-based RGB LED Modules in a strip | |
/*****************************************************************************/ | |
// Number of RGB LEDs in strand: | |
int nLEDs = 32; | |
// number that we will not be writing to | |
int skipLEDs = 16; | |
// Chose 2 pins for output; can be any valid output pins: | |
int dataPin = 2; | |
int clockPin = 3; | |
// First parameter is the number of LEDs in the strand. The LED strips | |
// are 32 LEDs per meter but you can extend or cut the strip. Next two | |
// parameters are SPI data and clock pins: | |
LPD8806 strip = LPD8806(nLEDs, dataPin, clockPin); | |
// You can optionally use hardware SPI for faster writes, just leave out | |
// the data and clock pin parameters. But this does limit use to very | |
// specific pins on the Arduino. For "classic" Arduinos (Uno, Duemilanove, | |
// etc.), data = pin 11, clock = pin 13. For Arduino Mega, data = pin 51, | |
// clock = pin 52. For 32u4 Breakout Board+ and Teensy, data = pin B2, | |
// clock = pin B1. For Leonardo, this can ONLY be done on the ICSP pins. | |
//LPD8806 strip = LPD8806(nLEDs); | |
void setup() { | |
// Start up the LED strip | |
strip.begin(); | |
// Update the strip, to start they are all 'off' | |
strip.show(); | |
} | |
void loop() { | |
colorWipe(strip.Color(127, 127, 127), 50); // White | |
delay(100000); | |
// Send a simple pixel chase in... | |
colorChase(strip.Color(127, 127, 127), 50); // White | |
colorChase(strip.Color(127, 0, 0), 50); // Red | |
colorChase(strip.Color(127, 127, 0), 50); // Yellow | |
colorChase(strip.Color( 0, 127, 0), 50); // Green | |
colorChase(strip.Color( 0, 127, 127), 50); // Cyan | |
colorChase(strip.Color( 0, 0, 127), 50); // Blue | |
colorChase(strip.Color(127, 0, 127), 50); // Violet | |
// Fill the entire strip with... | |
colorWipe(strip.Color(127, 0, 0), 50); // Red | |
colorWipe(strip.Color( 0, 127, 0), 50); // Green | |
colorWipe(strip.Color( 0, 0, 127), 50); // Blue | |
rainbow(10); | |
rainbowCycle(0); // make it go through the cycle fairly fast | |
} | |
void rainbow(uint8_t wait) { | |
int i, j; | |
for (j=0; j < 384; j++) { // 3 cycles of all 384 colors in the wheel | |
for (i=0; i < strip.numPixels(); i++) { | |
if (i>=skipLEDs) { | |
strip.setPixelColor(i, Wheel( (i + j) % 384)); | |
} | |
} | |
strip.show(); // write all the pixels out | |
delay(wait); | |
} | |
} | |
// Slightly different, this one makes the rainbow wheel equally distributed | |
// along the chain | |
void rainbowCycle(uint8_t wait) { | |
uint16_t i, j; | |
for (j=0; j < 384 * 5; j++) { // 5 cycles of all 384 colors in the wheel | |
for (i=0; i < strip.numPixels(); i++) { | |
// tricky math! we use each pixel as a fraction of the full 384-color wheel | |
// (thats the i / strip.numPixels() part) | |
// Then add in j which makes the colors go around per pixel | |
// the % 384 is to make the wheel cycle around | |
if (i>=skipLEDs) { | |
strip.setPixelColor(i, Wheel( ((i * 384 / strip.numPixels()) + j) % 384) ); | |
} | |
} | |
strip.show(); // write all the pixels out | |
delay(wait); | |
} | |
} | |
// Fill the dots progressively along the strip. | |
void colorWipe(uint32_t c, uint8_t wait) { | |
int i; | |
for (i=0; i < strip.numPixels(); i++) { | |
if (i>=skipLEDs) { | |
strip.setPixelColor(i, c); | |
strip.show(); | |
delay(wait); | |
} | |
} | |
} | |
// Chase one dot down the full strip. | |
void colorChase(uint32_t c, uint8_t wait) { | |
int i; | |
// Start by turning all pixels off: | |
for(i=0; i<strip.numPixels(); i++) strip.setPixelColor(i, 0); | |
// Then display one pixel at a time: | |
for(i=skipLEDs; i<strip.numPixels(); i++) { | |
strip.setPixelColor(i, c); // Set new pixel 'on' | |
strip.show(); // Refresh LED states | |
strip.setPixelColor(i, 0); // Erase pixel, but don't refresh! | |
delay(wait); | |
} | |
strip.show(); // Refresh to turn off last pixel | |
} | |
/* Helper functions */ | |
//Input a value 0 to 384 to get a color value. | |
//The colours are a transition r - g -b - back to r | |
uint32_t Wheel(uint16_t WheelPos) | |
{ | |
byte r, g, b; | |
switch(WheelPos / 128) | |
{ | |
case 0: | |
r = 127 - WheelPos % 128; //Red down | |
g = WheelPos % 128; // Green up | |
b = 0; //blue off | |
break; | |
case 1: | |
g = 127 - WheelPos % 128; //green down | |
b = WheelPos % 128; //blue up | |
r = 0; //red off | |
break; | |
case 2: | |
b = 127 - WheelPos % 128; //blue down | |
r = WheelPos % 128; //red up | |
g = 0; //green off | |
break; | |
} | |
return(strip.Color(r,g,b)); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment