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#include "LPD8806.h"
#include "SPI.h"
// Simple test for 160 (5 meters) of LPD8806-based RGB LED strip
/*****************************************************************************/
// Number of RGB LEDs in strand:
int nLEDs = 160;
// 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);
uint32_t SCHEMES[5][4] = {
{
strip.Color(117, 0, 27),
strip.Color(127, 43, 0),
strip.Color(0, 85, 57),
strip.Color(41, 111, 0)
},
{
strip.Color(99,0,62),
strip.Color(124,0,9),
strip.Color(53,5,85),
strip.Color(84,120,0)
},
{
strip.Color(127,95,0),
strip.Color(41,7,86),
strip.Color(41,7,86),
strip.Color(5,48,82)
},
{
strip.Color(0,93,31),
strip.Color(3,60,79),
strip.Color(67,117,0),
strip.Color(127,20,0)
},
{
strip.Color(79,119,0),
strip.Color(0,102,0),
strip.Color(127,0,0),
strip.Color(102,0,58)
}};
int mode;
unsigned long last;
uint32_t* scheme;
void setup() {
// Start up the LED strip
strip.begin();
// Update the strip, to start they are all 'off'
strip.show();
randomSeed(analogRead(0));
mode = 1;
scheme = SCHEMES[random(5)];
last = 0;
}
void loop() {
unsigned long t = millis();
if (t - last > 25000) {
mode = (mode + 1) % 2;
scheme = SCHEMES[random(5)];
last = t;
}
if (mode == 0)
chase(scheme);
else if (mode == 1)
sparkle(scheme);
}
void sparkle(uint32_t* scheme) {
int i;
uint32_t c;
uint8_t wait;
// 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=0; i<strip.numPixels(); i++) {
c = scheme[random(4)];
strip.setPixelColor(i, c); // Set new pixel 'on'
// strip.show(); // Refresh LED states
// strip.setPixelColor(i, 0); // Erase pixel, but don't refresh!
// delay(random(30));
}
strip.show(); // Refresh to turn off last pixel
delay(50);
}
void chase(uint32_t* scheme) {
int i;
uint32_t c;
uint8_t wait;
// 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=0; i<strip.numPixels(); i++) {
c = scheme[random(4)];
strip.setPixelColor(i, c); // Set new pixel 'on'
strip.setPixelColor((i * 2) % nLEDs, c); // Set new pixel 'on'
strip.setPixelColor((i * 3) % nLEDs, c); // Set new pixel 'on'
strip.setPixelColor((i * 5) % nLEDs, c); // Set new pixel 'on'
strip.show(); // Refresh LED states
strip.setPixelColor(i, 0); // Erase pixel, but don't refresh!
strip.setPixelColor((i * 2) % nLEDs, 0); // Set new pixel 'on'
strip.setPixelColor((i * 3) % nLEDs, c); // Set new pixel 'on'
strip.setPixelColor((i * 5) % nLEDs, c); // Set new pixel 'on'
delay(random(30));
}
strip.show(); // Refresh to turn off last pixel
}
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