RGBpixel
Addressable RGB LED "pixels" from Cool Neon
Wiring
- RED - +5v
- GREEN - Data
- YELLOW - Clock
- BLUE - Ground
/* Developed by: thex (noisebridge) Updated: 20131122 Revised: 20140829 (evil dan) https://noisebridge.net/wiki/RGBpixel
- /
// Arduino UNO Default wiring, Yellow to Pin 13 & Green to Pin 11
- 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>>1, 0x00);
// YELLOW
sendColor(maxPower, maxPower, 0x00);
// CHARTREUSE
sendColor(maxPower>>1, maxPower, 0x00);
// GREEN
sendColor(0x00,maxPower,0x00);
// SPRING
sendColor(0x00, maxPower, maxPower>>1);
// CYAN
sendColor(0x00, maxPower, maxPower);
// AZURE
sendColor(0x00, maxPower>>1, maxPower);
// BLUE
sendColor(0x00,0x00,maxPower);
// VIOLOET
sendColor(maxPower>>1, 0x00, maxPower);
// MAGENTA
sendColor(maxPower, 0x00, maxPower);
// ROSE
sendColor(maxPower, 0x00, maxPower>>1);
}
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;
}