Prototype #1 basic code

/*

  RGB2.pde

  Cycles through the colors of a RGB LED

  Adapted from SparkFun Arduino Inventor's Kit CIRC-RGB

*/

// LED leads connected to PWM pins
const int RED_LED_PIN = 9;
const int GREEN_LED_PIN = 10;
const int BLUE_LED_PIN = 11;
// for use by the colour balance controls
int RED_MAX = 255;
int GREEN_MAX = 255;
int BLUE_MAX = 255;

// Potentiometer for basic adjustment
const byte POT_PIN = 0;

// an array to hold the brightness values
int vals[3] = {0,0,0};
// Length of time we spend showing each color
const int DISPLAY_TIME = 5; // In milliseconds
//a general purpose counter
int i;

void setup() {
    // blank the leds to start
    showRGB(0,0,0);
    Serial.begin(115200); // for debugging
}

void loop() {

  // cycle through some patterns
  noFade(5);
  fadeAll(3);
  fadeOne(3);
  fadeTwo(3);
  fadeThree(3);
   //strobeOne(3600);

}

void strobeOne(int secs) {
    // strobe all the leds for a varying on time based on the pot position
    // all times apart from running time are in milliseconds
    int off_time = 67; // not used
    int on_time = 10;
    double long end_time = millis() + (secs * 1000);
    while (millis() < end_time) {
        analogWrite(RED_LED_PIN, 255);
        analogWrite(GREEN_LED_PIN, 255);
        analogWrite(BLUE_LED_PIN, 255);

        delay(on_time);
        analogWrite(RED_LED_PIN, 0);
        analogWrite(GREEN_LED_PIN, 0);
        analogWrite(BLUE_LED_PIN, 0);
        //  getting the strobe timing from the pot
        delay(analogRead(POT_PIN));
    }

}

void noFade(int secs) {
    // All on full for the duration
    unsigned long end_time = millis() + secs * 1000;
    while (millis() < end_time) {
     showRGB(255,255,255);
     delay(10);  // just because

    }
}

void fadeAll(int reps) {
  // fade all leds up and back down together 3 times
  for (int x=0;x<reps;x++) {
      for (i=0;i<255;i++) {
          showRGB(i,i,i);
          delay(DISPLAY_TIME);
      }
      for (i=255;i>-1;i--) {
          showRGB(i,i,i);
          delay(DISPLAY_TIME);
      }
  }
}

void fadeOne(int reps) {
  // fade up each colour in turn
  for (int x=0;x<reps;x++) {
      for (int led=0;led<3;led++) {
          for (i=0;i<255;i++) {
              vals[0] = i;
              vals[1] = 0;
              vals[2] = 0;
              showRGB(vals[led],vals[(led+1)%3],vals[(led+2)%3]);
              delay(DISPLAY_TIME);
          }
          for (i=255;i>-1;i--) {
              vals[0] = i;
              vals[1] = 0;
              vals[2] = 0;
              showRGB(vals[led],vals[(led+1)%3],vals[(led+2)%3]);
              delay(DISPLAY_TIME);
          }
      }
  }
}

void fadeTwo(int reps) {
  // now fade up 1 while fading down another
  for (int x=0;x<reps;x++) {
      for (int led=0;led<3;led++) {
          for (i=0;i<255;i++) {
              vals[0] = i;
              vals[1] = 255-i;
              vals[2] = 0;
              showRGB(vals[led],vals[(led+1)%3],vals[(led+2)%3]);
              // delay twice as long because we're doing 2 things at once
              delay(DISPLAY_TIME * 2);
          }
      }
  }
}

void fadeThree(int reps) {
  // same, but with the third led lit this time.
  for (int x=0;x<reps;x++) {
      for (int led=2;led>-1;led--) {
          for (i=0;i<255;i++) {
              vals[0] = i;
              vals[1] = 255-i;
              vals[2] = 255;
              showRGB(vals[led],vals[(led+1)%3],vals[(led+2)%3]);
              delay(DISPLAY_TIME * 2);
          }
      }
  }
}

void showRGB(byte red_value, byte green_value, byte blue_value) {
  //red_value = constrain(red_value,0,RED_MAX);
  //green_value = constrain(green_value,0,GREEN_MAX);
  //blue_value = constrain(blue_value,0,BLUE_MAX);
  // hacking a global brightness control in here for now
  int led_max = map(analogRead(POT_PIN), 0, 1023, 0, 255);
  RED_MAX = led_max;
  GREEN_MAX = led_max;
  BLUE_MAX = led_max;
  analogWrite(RED_LED_PIN, constrain(red_value,0,RED_MAX));
  analogWrite(GREEN_LED_PIN, constrain(green_value,0,GREEN_MAX));
  analogWrite(BLUE_LED_PIN, constrain(blue_value,0,BLUE_MAX));

}