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RGBEffect.cpp
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RGBEffect.cpp
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/*
RGBEffect.cpp - Effect Library for the Spark Core's RGB LED.
Created by Harrison H. Jones, Jan 25, 2015.
*/
#if defined (SPARK)
#include "application.h"
#else
#error "Only SparkCore RGB LED Supported."
#endif
#include "RGBEffect.h"
RGBEffect::RGBEffect()
{
_time = millis();
_fadeAmount = 5; // how many points to fade the LED by
_fadeDirection = _fadeAmount;
_ledState = 0; // 0 = off, 1 = on, 2 = breath, 3 = fade down, 4 = fade up, 5 = blink
_ledDelay = 30; // in ms
// Color 1 = White
_red[0] = 255;
_green[0] = 255;
_blue[0] = 255;
_colorSequence[0] = 0;
_colorSequenceNum = 1;
_colorSequenceIndex = 0; // Point to the first entry in _colorSequence
}
void RGBEffect::update()
{
if((millis() - _time) > _ledDelay)
{
_time = millis();
if(_ledState == STATE_OFF)
_setColor(0,0,0);
else if(_ledState == STATE_ON)
_setColor(0);
else if (_ledState == STATE_BREATH)
{
if(_colorDiff(_colorSequence[_colorSequenceIndex]) == 0) // We have reached the current color
{
_colorSequenceIndex++;
if(_colorSequenceIndex >= _colorSequenceNum)
_colorSequenceIndex = 0;
}
_moveTowardsColorS(_colorSequenceIndex);
}
else if (_ledState == STATE_FADE)
{
// Fading starts at the current color in the sequence and then gradually moves toward the next one.
// Once it reaches the end of the sequence it abruptely transitions t the first color in the sequence
if(_colorDiff(_colorSequence[_colorSequenceIndex]) == 0) // We have reached the current color
{
_colorSequenceIndex++;
if(_colorSequenceIndex >= _colorSequenceNum)
{
_colorSequenceIndex = 0;
_setColorS(_colorSequenceIndex);
}
}
_moveTowardsColorS(_colorSequenceIndex);
}
else if (_ledState == STATE_BLINK)
{
_setColorS(_colorSequenceIndex);
_colorSequenceIndex++;
if(_colorSequenceIndex >= _colorSequenceNum)
_colorSequenceIndex = 0;
}
}
}
void RGBEffect::off()
{
_ledState = STATE_OFF;
}
void RGBEffect::on(unsigned char colorNum)
{
_ledState = STATE_ON;
_colorSequence[0] = colorNum;
_colorSequenceNum = 1;
}
void RGBEffect::breath(unsigned int colorNumSeq[], unsigned int numInSeq)
{
_ledState = STATE_BREATH;
_copySequence(colorNumSeq, numInSeq);
_colorSequenceIndex = 0;
}
void RGBEffect::fade(unsigned int colorNumSeq[], unsigned int numInSeq)
{
_ledState = STATE_FADE;
_copySequence(colorNumSeq, numInSeq);
_colorSequenceIndex = 0;
_setColorS(_colorSequenceIndex); // Instantly transition to the first color
}
void RGBEffect::blink(unsigned int colorNumSeq[], unsigned int numInSeq)
{
_ledState = STATE_BLINK;
_copySequence(colorNumSeq, numInSeq);
}
void RGBEffect::release()
{
_ledState = STATE_RELEASED;
RGB.control(false);
}
void RGBEffect::setColor(unsigned char colorNum, unsigned int red, unsigned int green, unsigned int blue)
{
_red[colorNum] = red;
_green[colorNum] = green;
_blue[colorNum] = blue;
}
void RGBEffect::setDelay(unsigned int ledDelay)
{
_ledDelay = ledDelay;
}
void RGBEffect::swapColors(unsigned char colorNum1, unsigned char colorNum2)
{
unsigned int red = _red[colorNum1];
unsigned int green = _green[colorNum1];
unsigned int blue = _blue[colorNum1];
_red[colorNum1] = _red[colorNum2];
_green[colorNum1] = _green[colorNum2];
_blue[colorNum1] = _blue[colorNum2];
_red[colorNum2] = red;
_green[colorNum2] = green;
_blue[colorNum2] = blue;
}
void RGBEffect::_copySequence(unsigned int colorNumSeq[], unsigned int numInSeq)
{
if(numInSeq > MAX_SEQUENCE_LENGTH) // Truncate if too many in sequence
numInSeq = MAX_SEQUENCE_LENGTH;
for(unsigned int i=0;i<numInSeq;i++)
_colorSequence[i] = colorNumSeq[i];
_colorSequenceNum = numInSeq;
}
/**
_colorDiff
Returns the absolute difference between two colors: the active color and the
color designated by colorNum
*/
unsigned int RGBEffect::_colorDiff(unsigned int colorNum)
{
unsigned int redDiff = abs(_currRed - _red[colorNum]);
unsigned int greenDiff = abs(_currGreen - _green[colorNum]);
unsigned int blueDiff = abs(_currBlue - _blue[colorNum]);
return redDiff + greenDiff + blueDiff;
}
void RGBEffect::_moveTowardsColor(unsigned int colorNum)
{
if(_colorDiff(colorNum) == 0)
return;
int redDiff = _currRed - _red[colorNum];
int greenDiff = _currGreen - _green[colorNum];
int blueDiff = _currBlue - _blue[colorNum];
if (abs(redDiff) <= FADE_AMOUNT)
{
Serial.println("redDiff ~= FADE_AMOUNT");
_currRed = _red[colorNum];
}
else
{
if (redDiff > FADE_AMOUNT)
{
_currRed -= FADE_AMOUNT;
Serial.println("redDiff > FADE_AMOUNT");
}
else
{
Serial.println("redDiff < FADE_AMOUNT");
_currRed += FADE_AMOUNT;
}
}
if (abs(greenDiff) <= FADE_AMOUNT)
{
_currGreen = _green[colorNum];
}
else
{
if (greenDiff > FADE_AMOUNT)
{
_currGreen -= FADE_AMOUNT;
}
else
{
_currGreen += FADE_AMOUNT;
}
}
if (abs(blueDiff) <= FADE_AMOUNT)
{
_currBlue = _blue[colorNum];
}
else
{
if (blueDiff > FADE_AMOUNT)
{
_currBlue -= FADE_AMOUNT;
}
else
{
_currBlue += FADE_AMOUNT;
}
}
_setColor(_currRed,_currGreen,_currBlue);
}
void RGBEffect::_moveTowardsColorS(unsigned int sequenceIndex)
{
_moveTowardsColor(_colorSequence[sequenceIndex]);
}
void RGBEffect::_setColor(unsigned int red, unsigned int green, unsigned int blue)
{
if(red > MAX_RGB_VALUE)
red = MAX_RGB_VALUE;
if(green > MAX_RGB_VALUE)
green = MAX_RGB_VALUE;
if(blue > MAX_RGB_VALUE)
blue = MAX_RGB_VALUE;
RGB.control(true);
RGB.color(red,green,blue);
_currRed = red;
_currGreen = green;
_currBlue = blue;
Serial.print(red);
Serial.print(",");
Serial.print(green);
Serial.print(",)");
Serial.println(blue);
}
void RGBEffect::_setColor(unsigned char colorNum)
{
_setColor(_red[colorNum],_green[colorNum],_blue[colorNum]);
}
void RGBEffect::_setColorS(unsigned int sequenceIndex)
{
_setColor(_colorSequence[sequenceIndex]);
}