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);
}[출처] [아날로그 출력] - RGB|작성자 DEW
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