RGBpixel
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Addressable RGB LED "pixels" from Cool Neon
Wiring
- RED - +5v
- GREEN - Data
- YELLOW - Clock
- BLUE - Ground
Code
/* Developed by: thex (noisebridge) Updated: 20131122 https://noisebridge.net/wiki/RGBpixel */ #include <SPI.h> int waitTime = 100; byte maxPower = 0x33; int offset = 0; /* color hex r g b deg ========================================== RED #FF0000 255, 0, 0 0 ORANGE #FF7F00 255, 127, 0 30 YELLOW #FFFF00 255, 255, 0 60 CHARTREUSE #7FFF00 127, 255, 0 90 GREEN #00FF00 0, 255, 0 120 SPRING #00FF7F 0, 255, 127 150 CYAN #00FFFF 0, 255, 255 180 AZURE #007FFF 0, 127, 255 210 BLUE #0000FF 0, 0, 255 240 VIOLET #7F00FF 127, 0, 255 270 MAGENTA #FF00FF 255, 0, 255 300 ROSE #FF007F 255, 0, 127 330 */ void setup() { // Set the SPI parameters SPI.begin(); SPI.setBitOrder(MSBFIRST); SPI.setDataMode(SPI_MODE0); SPI.setClockDivider(SPI_CLOCK_DIV2); sendEmptyFrame(); } void loop() { for (int o = 0; o < offset; o++) sendColor(maxPower, maxPower, maxPower); offset++; if (offset > 25) offset = 0; for (int i = 0; i < 2; i++) { // RED sendColor(maxPower,0x00,0x00); // ORANGE sendColor(maxPower, maxPower>>2, 0x00); // YELLOW sendColor(maxPower, maxPower, 0x00); // CHARTREUSE sendColor(maxPower>>2, maxPower, 0x00); // GREEN sendColor(0x00,maxPower,0x00); // SPRING sendColor(0x00, maxPower, maxPower>>2); // CYAN sendColor(0x00, maxPower, maxPower); // AZURE sendColor(0x00, maxPower>>2, maxPower); // BLUE sendColor(0x00,0x00,maxPower); // VIOLOET sendColor(maxPower>>2, 0x00, maxPower); // MAGENTA sendColor(maxPower, 0x00, maxPower); // ROSE sendColor(maxPower, 0x00, maxPower>>2); } sendEmptyFrame(); delay(waitTime); } // Extrapolated functions from TCL Library void sendFrame(byte flag, byte red, byte green, byte blue) { SPI.transfer(flag); SPI.transfer(blue); SPI.transfer(green); SPI.transfer(red); } void sendColor(byte red, byte green, byte blue) { byte flag; flag = makeFlag(red,green,blue); sendFrame(flag,red,green,blue); } void sendEmptyFrame() { sendFrame(0x00, 0x00, 0x00, 0x00); } byte makeFlag(byte red, byte green, byte blue) { byte flag = 0; flag = (red&0xC0)>>6; flag |= ((green&0xC0)>>4); flag |= ((blue&0xC0)>>2); return ~flag; }