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Dimmer.cpp
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Dimmer.cpp
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/**
* File: Dimmer.cpp
* Description:
* SoftTimer library is a lightweight but effective event based timeshare solution for Arduino.
*
* Author: Balazs Kelemen
* Contact: [email protected]
* Copyright: 2012 Balazs Kelemen
* Copying permission statement:
This file is part of SoftTimer.
SoftTimer is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "SoftTimer.h"
#include "Dimmer.h"
Dimmer::Dimmer(SoftPwmTask* pwm, int frequencyMs) : Task(10, &(Dimmer::step))
{
this->_pwm = pwm;
this->direction = DIMMER_DIRECTION_HIGH;
this->value = 0;
this->_pwm->analogWrite((byte)this->value);
this->stepCount = DEFAULT_STEP_COUNT;
this->setFrequency(frequencyMs);
}
void Dimmer::startPulsate() {
this->stopOnLimit = false;
SoftTimer.add(this->_pwm);
SoftTimer.add(this);
}
void Dimmer::hold() {
SoftTimer.remove(this);
}
void Dimmer::off() {
this->hold();
this->_pwm->off();
SoftTimer.remove(this);
SoftTimer.remove(this->_pwm);
}
void Dimmer::revertDirection() {
this->direction *= -1;
}
void Dimmer::setFrequency(int frequencyMs) {
this->_stepLevel = (float)this->_pwm->upperLimit / (float)this->stepCount;
this->periodMicros = (float)frequencyMs * 500.0 / (float)this->stepCount;
}
byte Dimmer::getUpperLimit() {
return this->_pwm->upperLimit;
}
void Dimmer::step(Task* task)
{
Dimmer* dimmer = (Dimmer*)task;
boolean isOnLimit = false;
dimmer->value += dimmer->direction * dimmer->_stepLevel;
if((dimmer->direction < 0) && (dimmer->value < 0)) {
dimmer->value = 0;
dimmer->direction *= -1; // -- next time go in the other direction
isOnLimit = true;
} else if((dimmer->direction > 0) && (dimmer->value > dimmer->_pwm->upperLimit)) {
dimmer->value = dimmer->_pwm->upperLimit;
dimmer->direction *= -1; // -- next time go in the other direction
isOnLimit = true;
}
dimmer->_pwm->analogWrite((byte)dimmer->value);
if(isOnLimit && dimmer->stopOnLimit) {
SoftTimer.remove(dimmer);
}
}