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/*
* Colours - library for managing the colours on RGB LEDs
* Copyright 2009, 2013 Elena Grandi
*
* This file is part of Colours.
*
* Colours is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* Colours is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Colours. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Arduino.h"
#include "Colours.h"
Colours::Colours(int rPin,int gPin,int bPin) {
_initPINs(rPin,gPin,bPin);
_invert = false;
}
Colours::Colours(int rPin,int gPin,int bPin,bool invert) {
_initPINs(rPin,gPin,bPin);
_invert = invert;
}
void Colours::_initPINs(int rPin,int gPin,int bPin) {
_rPin = rPin;
_gPin = gPin;
_bPin = bPin;
pinMode(_rPin,OUTPUT);
pinMode(_gPin,OUTPUT);
pinMode(_bPin,OUTPUT);
}
void Colours::writeRGB(unsigned char r,unsigned char g,unsigned char b) {
if (_invert) {
analogWrite(_rPin, 255-r);
analogWrite(_gPin, 255-g);
analogWrite(_bPin, 255-b);
} else {
analogWrite(_rPin, r);
analogWrite(_gPin, g);
analogWrite(_bPin, b);
}
}
void Colours::writeHSV(unsigned int h,unsigned char s,unsigned char v) {
h = h % 360;
if (s==0) {
writeRGB(v,v,v);
} else {
unsigned int f,p,q,t;
f = 256*(h%60)/60;
p = v*(256-s)/256;
q = v*(256-f*s/256)/256;
t = v*(256-s*(256-f)/256)/256;
switch( (h/60) % 6 ) {
case 0:
writeRGB(v,t,p);
break;
case 1:
writeRGB(q,v,p);
break;
case 2:
writeRGB(p,v,t);
break;
case 3:
writeRGB(p,q,v);
break;
case 4:
writeRGB(t,p,v);
break;
case 5:
writeRGB(v,p,q);
break;
}
}
}
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