Helper.ino

/*__________________________________________________________HELPER_FUNCTIONS__________________________________________________________*/
String formatBytes(size_t bytes) { // convert sizes in bytes to KB and MB
  if (bytes < 1024) {
    return String(bytes) + "B";
  } else if (bytes < (1024 * 1024)) {
    return String(bytes / 1024.0) + "KB";
  } else if (bytes < (1024 * 1024 * 1024)) {
    return String(bytes / 1024.0 / 1024.0) + "MB";
  }
}

String getContentType(String filename) { // determine the filetype of a given filename, based on the extension
  if (filename.endsWith(".html")) return "text/html";
  else if (filename.endsWith(".css")) return "text/css";
  else if (filename.endsWith(".js")) return "application/javascript";
  else if (filename.endsWith(".ico")) return "image/x-icon";
  else if (filename.endsWith(".gz")) return "application/x-gzip";
  return "text/plain";
}

void setHue(int hue) { // Set the RGB LED to a given hue (color) (0° = Red, 120° = Green, 240° = Blue)
  hue %= 360;                   // hue is an angle between 0 and 359°
  float radH = hue*3.142/180;   // Convert degrees to radians
  float rf, gf, bf;
  
  if(hue>=0 && hue<120){        // Convert from HSI color space to RGB              
    rf = cos(radH*3/4);
    gf = sin(radH*3/4);
    bf = 0;
  } else if(hue>=120 && hue<240){
    radH -= 2.09439;
    gf = cos(radH*3/4);
    bf = sin(radH*3/4);
    rf = 0;
  } else if(hue>=240 && hue<360){
    radH -= 4.188787;
    bf = cos(radH*3/4);
    rf = sin(radH*3/4);
    gf = 0;
  }
  int r = rf*rf*1023;
  int g = gf*gf*1023;
  int b = bf*bf*1023;
  
  analogWrite(LED_RED,   r);    // Write the right color to the LED output pins
  analogWrite(LED_GREEN, g);
  analogWrite(LED_BLUE,  b);
}

void set_red()
{
  digitalWrite(LED_RED, HIGH);
  digitalWrite(LED_BLUE, LOW);
  digitalWrite(LED_GREEN, LOW);
}

void set_yellow()
{
  digitalWrite(LED_RED, LOW);
  digitalWrite(LED_BLUE, HIGH);
  digitalWrite(LED_GREEN, LOW);
}

void set_green()
{
  digitalWrite(LED_RED, LOW);
  digitalWrite(LED_BLUE, LOW);
  digitalWrite(LED_GREEN, HIGH);
}