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PulseSource.h
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// (c) 2016 Neeraj Sharma <[email protected]>.
// This file is part of SignalBlocks.
//
// SignalBlocks 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.
//
// SignalBlocks 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 SignalBlocks. If not, see <http://www.gnu.org/licenses/>.
//
#ifndef SIGNALBLOCKS_PULSESOURCE_H
#define SIGNALBLOCKS_PULSESOURCE_H
#include "../../common/PortType.h"
#include "../../common/Port.h"
#include "../../common/TimeTick.h"
#include <assert.h>
#include <vector>
namespace signalblocks {
/** PulseSource A sample based pulse signal source.
* This source block generate pulse signal (high and then low)
* based on samples (and not time ticks). This block generates a scalar,
* vector or matrix output based on the template parameter.
*
* For vector and matrix output each of the elements has the same value in a
* clock cycle.
*
* In case you are looking for a time tick based pulse source then
* either enhance this block or write a new one. It would be
* better though to define a new template parameter to
* specify time tick based pulse generator though.
*/
template<class T, PortType P = PORT_TYPE_SCALAR>
class PulseSource
: public Port<0, 1, T> {
public:
PulseSource(std::string name,
double periodOffset,
int periodSamples,
double highRatio,
const T& highValue,
const T& lowValue)
: Port<0, 1, T>(std::move(name), "A pulse source."),
mPeriodSample(0),
mTotalPeriodSamples(periodSamples),
mHighRatio(highRatio),
mHighValue(highValue),
mLowValue(lowValue) {
assert(periodOffset >= 0.0);
assert(periodOffset < 1.0);
assert(highRatio > 0.0);
assert(highRatio < 1.0);
mPeriodSample = static_cast<int>(mTotalPeriodSamples * periodOffset);
}
public: // override Port interfaces
virtual void ClockCycle(const TimeTick& timeTick) {
T value = mLowValue;
double ratio = static_cast<double>(mPeriodSample) / mTotalPeriodSamples;
if (ratio <= mHighRatio) {
value = mHighValue;
}
this->LeakData(0, value, timeTick);
mPeriodSample = (mPeriodSample + 1) % mTotalPeriodSamples;
}
private:
int mPeriodSample;
const int mTotalPeriodSamples;
const double mHighRatio;
const T mHighValue;
const T mLowValue;
};
template<class T>
class PulseSource<T, PORT_TYPE_VECTOR>
: public Port<0, 1, T> {
public:
PulseSource(std::string name,
double periodOffset,
int periodSamples,
double highRatio,
const T& highValue,
const T& lowValue,
int len)
: Port<0, 1, T>(std::move(name), "A pulse source."),
mPeriodSample(0),
mTotalPeriodSamples(periodSamples),
mHighRatio(highRatio),
mHighValue(highValue),
mLowValue(lowValue),
mFixedLen(len) {
}
public: // override Port interfaces
virtual void ClockCycle(const TimeTick& timeTick) {
T value = mLowValue;
double ratio = static_cast<double>(mPeriodSample) / mTotalPeriodSamples;
if (ratio <= mHighRatio) {
value = mHighValue;
}
std::unique_ptr<T[]> data(new T[mFixedLen]);
for (int i = 0; i < mFixedLen; ++i) {
data.get()[i] = value;
}
this->LeakData(0, std::move(data), mFixedLen, timeTick);
mPeriodSample = (mPeriodSample + 1) % mTotalPeriodSamples;
}
private:
int mPeriodSample;
const int mTotalPeriodSamples;
const double mHighRatio;
const T mHighValue;
const T mLowValue;
const int mFixedLen;
};
template<class T>
class PulseSource<T, PORT_TYPE_MATRIX>
: public Port<0, 1, T> {
public:
PulseSource(std::string name,
double periodOffset,
int periodSamples,
double highRatio,
const T& highValue,
const T& lowValue,
const std::vector<int>& dims)
: Port<0, 1, T>(std::move(name), "A pulse source."),
mPeriodSample(0),
mTotalPeriodSamples(periodSamples),
mHighRatio(highRatio),
mHighValue(highValue),
mLowValue(lowValue),
mFixedDims(dims),
mFixedLen(1) {
assert(! mFixedDims.empty());
for (size_t i = 0; i < mFixedDims.size(); ++i) {
mFixedLen *= mFixedDims[i];
}
assert(mFixedLen > 0);
}
public: // override Port interfaces
virtual void ClockCycle(const TimeTick& timeTick) {
T value = mLowValue;
double ratio = static_cast<double>(mPeriodSample) / mTotalPeriodSamples;
if (ratio <= mHighRatio) {
value = mHighValue;
}
std::unique_ptr<T[]> data(new T[mFixedLen]);
for (int i = 0; i < mFixedLen; ++i) {
data.get()[i] = value;
}
this->LeakMatrix(0, std::move(data), mFixedDims, timeTick);
mPeriodSample = (mPeriodSample + 1) % mTotalPeriodSamples;
}
private:
int mPeriodSample;
const int mTotalPeriodSamples;
const double mHighRatio;
const T mHighValue;
const T mLowValue;
const std::vector<int> mFixedDims;
int mFixedLen;
};
}
#endif //SIGNALBLOCKS_PULSESOURCE_H