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QuadratureAnalyserSimulationDataGenerator.cpp
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QuadratureAnalyserSimulationDataGenerator.cpp
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/* Copyright 2011 Dirk-Willem van Gulik, All Rights Reserved.
* dirkx(at)webweaving(dot)org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Id: QuadratureAnalyserSimulationDataGenerator.cpp 1037 2011-09-12 09:49:58Z dirkx $
*/
#include "QuadratureAnalyserSimulationDataGenerator.h"
#include "QuadratureAnalyserAnalyzerSettings.h"
#include "QuadratureAnalyserAnalyzer.h"
#include <AnalyzerHelpers.h>
#include <assert.h>
#include <random>
QuadratureAnalyserSimulationDataGenerator::QuadratureAnalyserSimulationDataGenerator()
{
initialized = false;
mChannelA = NULL;
mChannelB = NULL;
ticks = 10; dir = 0; at = 0;
runtime = 0; speed = 1;
}
QuadratureAnalyserSimulationDataGenerator::~QuadratureAnalyserSimulationDataGenerator()
{
}
void QuadratureAnalyserSimulationDataGenerator::Initialize( U32 simulation_sample_rate, QuadratureAnalyserAnalyzerSettings* settings )
{
mSimulationSampleRateHz = simulation_sample_rate;
mSettings = settings;
if (initialized)
return;
initialized = true;
if (mSettings->mInputChannelA != UNDEFINED_CHANNEL) {
if (mChannelA == NULL)
mChannelA = mQuadratureSimulationChannels.Add( mSettings->mInputChannelA, simulation_sample_rate, BIT_LOW );
} else {
mChannelA = NULL;
}
if (mSettings->mInputChannelB != UNDEFINED_CHANNEL) {
if (mChannelB == NULL)
mChannelB = mQuadratureSimulationChannels.Add( mSettings->mInputChannelB, simulation_sample_rate, BIT_LOW );
} else {
mChannelB = NULL;
}
mClockGenerator.Init(SCANRATE /* 10 to 5k */, simulation_sample_rate );
}
U32 QuadratureAnalyserSimulationDataGenerator::GenerateSimulationData( U64 largest_sample_requested, U32 sample_rate, SimulationChannelDescriptor** simulation_channel )
{
U64 adjusted_largest_sample_requested = AnalyzerHelpers::AdjustSimulationTargetSample(
largest_sample_requested, sample_rate, mSimulationSampleRateHz );
U64 tA = 0, tB = 0;
#if 0
// keep getting mChannelA related core dumps.
U64 at;
#define _gcsn(a) (((a) == NULL) ? 0 : (a)->GetCurrentSampleNumber())
#define _mmax(a,b) (_gcsn(a) > _gcsn(b) ? _gcsn(a) : _gcsn(b))
at = _mmax(mChannelA,mChannelB);
#endif
#define DIRSTR(x) (x ? ((x==1) ? "in clockwise direction" : "in counter clockwise direction") : "standing still")
#if 0
fprintf(stderr,"Starting at %lld, run till %lld - %ld ticks from previous run %s left over\n",
at, adjusted_largest_sample_requested, ticks, DIRSTR(dir));
#endif
std::random_device random_device;
std::mt19937 random_generator(random_device());
std::uniform_int_distribution<int> speed_distribution(5,15);
std::uniform_int_distribution<int> runtime_distribution(500,5000);
std::uniform_int_distribution<int> dir_distribution(0,2);
while( at < adjusted_largest_sample_requested )
{
if( ticks <= 0 )
{
speed = speed_distribution(random_generator); // 5 .. 15 tocks/second
runtime = runtime_distribution(random_generator); // 0.5 to 5 seconds.
dir = dir_distribution(random_generator); // in random (or non moving) direction.
ticks = 2 * speed * runtime / 1000;
// fprintf(stderr,"speed %d, length %d, ticks %d, %s\n", speed, runtime , ticks, DIRSTR(dir));
};
switch(dir) {
case 1: if (mChannelA) {
mChannelA->Transition();
tA++;
};
dir = 2;
break;
case 2: if (mChannelB) {
mChannelB->Transition();
tB++;
};
dir = 1;
break;
case 0: // stand still;
break;
default:
fprintf(stderr,"Eh - nothing\n");
};
U32 dtime = mClockGenerator.AdvanceByHalfPeriod(1) / (speed+1) * SCANRATE / 10;
mQuadratureSimulationChannels.AdvanceAll(dtime);
at += dtime;
if (ticks) ticks --;
#if 0
fprintf(stderr,"loop done - we are at %lld - going to %lld\n", at, adjusted_largest_sample_requested);
#endif
}
#if 0
fprintf(stderr,"Returning %d channels till sample %lld."
"There are %lld transitions (A:%lld, B:%lld) in this run. "
"Still %ld ticks %s left to do.\n",
mQuadratureSimulationChannels.GetCount(),
at, tA+tB, tA, tB, ticks, DIRSTR(dir)
);
#endif
*simulation_channel = mQuadratureSimulationChannels.GetArray();
return mQuadratureSimulationChannels.GetCount();
}