RGB

RGB LED에서 Red-> Yellow->Green-> Cyan->Blue -> Magenta 순으로 나타내고 싶다.

/*7.4 
control RGB
cookbook code
1*/

const int redPin = 3;
const int greenPin = 5;
const int bluePin = 6;
const boolean invert = true;

int color = 0;
int R, G, B;

void setup()
{
}

void loop()
{
  int brightness = 255;
  hueToRGB( color, brightness);
  
  analogWrite(redPin, R);
  analogWrite(greenPin, G);
  analogWrite(bluePin, B);
  
  color ++;
  if(color > 255)
  color = 0;
  delay(10);
}

void hueToRGB(int hue, int brightness)
{
  unsigned int scaledHue = (hue*6);
  unsigned int segment = scaledHue / 256;
  unsigned int segmentOffset = scaledHue - (segment*256);
  
  unsigned int complement = 0;
  unsigned int prev = (brightness * (255 - segmentOffset)) / 256;
  unsigned int next = (brightness * segmentOffset) / 256;
  if(invert)
  {
    brightness = 255-brightness;
    complement = 255;
    prev = 255-prev;
    next = 255-next;
  }
  
  switch(segment){
    case 0:
    R = brightness;
    G = next;
    B = complement;
    break;
    case 1:
    R = prev;
    G = brightness;
    B = complement;
    break;
    case 2:
    R = complement;
    G = brightness;
    B = next;
    break;
    case 3:
    R =complement;
    G = prev;
    B = brightness;
    break;
    case 4:
    R = next;
    G = complement;
    B = brightness;
    break;
    case 5:
    R = brightness;
    G = complement;
    B = prev;
    break;
  }
}

/*2
my RGB code*/ 

int color = 0;
const int redPin= 3, greenPin = 5, bluePin = 6;
int R, G, B;
const boolean invert = true;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  //dicide each brightness of RGB
  brightOfRGB( color);
  
  analogWrite(redPin, R);
  analogWrite(greenPin, G);
  analogWrite(bluePin, B);
  
  color ++;
  if(color > 255)
  color = 0;
  delay(10);
}

void brightOfRGB(int color)
{
  //dicide the color
 long domain = color*6;
 long segment = domain/256;
 long segmentOffset = domain-segment*256;
 
  //value of each kind of brightness
  long brightness=150;
  long prev=(150*(255-segmentOffset))/255;
  long next = (150*segmentOffset)/255;
  int complement =0;
  
  //because of common anode
  if(invert)
  {brightness = 255 - brightness;
   complement = 255 - complement;
   next = 255 - next;
   prev = 255 - prev;}
  
 
  //output each brightness from color
  switch(segment)
  {
    //RED
    case 0:
    R = brightness;
    G = next;
    B = complement;
    break;
    //YELLOW
    case 1 :
    R = prev;
    G = brightness;
    B = complement;
    break;
    //GREEN
    case 2:
    R = complement;
    G = brightness;
    B = next;
    break;
    //CYAN
    case 3:
    R = complement;
    G = prev;
    B = brightness;
    break;
    //BLUE
    case 4:
    R = next;
    G = complement;
    B = brightness;
    break;
    //MAGENTA
    case 5:
    R = brightness;
    G = complement;
    B = prev;
    break;
  }

/*3
analogcode reference*/

const int redPin= 3, greenPin = 5, bluePin = 6;
int R=255, G=0, B=0;
int r=0, g=0, b=0;

void setup()
{
  Serial.begin(9600);
}

void loop()
{

  if(R ==255)
  {r= -1;
   g=1;
   b=0;}
  if(G==255)
  {r=0;
   g=-1;
   b=1;}
  if(B==255)
  {r=1;
   g=0;
   b=-1;}
  
  R +=r;
  G +=g;
  B+=b;
 
  Serial.println(R);
  analogWrite(redPin, 255-R);
  analogWrite(greenPin, 255-G);
  analogWrite(bluePin, 255-B);
  delay(1);  
}

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