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February 21, 2019 19:41
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#include "LPD8806.h" | |
#include "SPI.h" // Comment out this line if using Trinket or Gemma | |
#ifdef __AVR_ATtiny85__ | |
#include <avr/power.h> | |
#endif | |
// Example to control LPD8806-based RGB LED Modules in a strip | |
/*****************************************************************************/ | |
// Number of RGB LEDs in strand: | |
int nLEDs = 32; | |
// Chose 2 pins for output; can be any valid output pins: | |
int dataPin = 3; | |
int clockPin = 2; | |
// 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() { | |
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000L) | |
clock_prescale_set(clock_div_1); // Enable 16 MHz on Trinket | |
#endif | |
// Start up the LED strip | |
strip.begin(); | |
// Update the strip, to start they are all 'off' | |
strip.show(); | |
} | |
void loop() { | |
// 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 | |
// Send a theater pixel chase in... | |
theaterChase(strip.Color(127, 127, 127), 50); // White | |
theaterChase(strip.Color(127, 0, 0), 50); // Red | |
theaterChase(strip.Color(127, 127, 0), 50); // Yellow | |
theaterChase(strip.Color( 0, 127, 0), 50); // Green | |
theaterChase(strip.Color( 0, 127, 127), 50); // Cyan | |
theaterChase(strip.Color( 0, 0, 127), 50); // Blue | |
theaterChase(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 | |
theaterChaseRainbow(50); | |
} | |
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++) { | |
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 | |
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++) { | |
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=0; 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 | |
} | |
//Theatre-style crawling lights. | |
void theaterChase(uint32_t c, uint8_t wait) { | |
for (int j=0; j<10; j++) { //do 10 cycles of chasing | |
for (int q=0; q < 3; q++) { | |
for (int i=0; i < strip.numPixels(); i=i+3) { | |
strip.setPixelColor(i+q, c); //turn every third pixel on | |
} | |
strip.show(); | |
delay(wait); | |
for (int i=0; i < strip.numPixels(); i=i+3) { | |
strip.setPixelColor(i+q, 0); //turn every third pixel off | |
} | |
} | |
} | |
} | |
//Theatre-style crawling lights with rainbow effect | |
void theaterChaseRainbow(uint8_t wait) { | |
for (int j=0; j < 384; j++) { // cycle all 384 colors in the wheel | |
for (int q=0; q < 3; q++) { | |
for (int i=0; i < strip.numPixels(); i=i+3) { | |
strip.setPixelColor(i+q, Wheel( (i+j) % 384)); //turn every third pixel on | |
} | |
strip.show(); | |
delay(wait); | |
for (int i=0; i < strip.numPixels(); i=i+3) { | |
strip.setPixelColor(i+q, 0); //turn every third pixel off | |
} | |
} | |
} | |
} | |
/* 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)); | |
} |
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