pv/data/signalbase.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  * Copyright (C) 2016 Soeren Apel <soeren@apelpie.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "analog.hpp"
  22 #include "analogsegment.hpp"
  23 #include "decode/row.hpp"
  24 #include "logic.hpp"
  25 #include "logicsegment.hpp"
  26 #include "signalbase.hpp"
  27 #include "signaldata.hpp"
  28
  29 #include <pv/binding/decoder.hpp>
  30 #include <pv/session.hpp>
  31
  32 using std::dynamic_pointer_cast;
  33 using std::make_shared;
  34 using std::shared_ptr;
  35 using std::tie;
  36 using std::unique_lock;
  37
  38 namespace pv {
  39 namespace data {
  40
  41 const int SignalBase::ColourBGAlpha = 8 * 256 / 100;
  42 const uint64_t SignalBase::ConversionBlockSize = 4096;
  43 const uint32_t SignalBase::ConversionDelay = 1000;  // 1 second
  44
  45 SignalBase::SignalBase(shared_ptr<sigrok::Channel> channel, ChannelType channel_type) :
  46         channel_(channel),
  47         channel_type_(channel_type),
  48         conversion_type_(NoConversion),
  49         min_value_(0),
  50         max_value_(0)
  51 {
  52         if (channel_)
  53                 internal_name_ = QString::fromStdString(channel_->name());
  54
  55         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
  56                 this, SLOT(on_delayed_conversion_start()));
  57         delayed_conversion_starter_.setSingleShot(true);
  58         delayed_conversion_starter_.setInterval(ConversionDelay);
  59 }
  60
  61 SignalBase::~SignalBase()
  62 {
  63         stop_conversion();
  64 }
  65
  66 shared_ptr<sigrok::Channel> SignalBase::channel() const
  67 {
  68         return channel_;
  69 }
  70
  71 QString SignalBase::name() const
  72 {
  73         return (channel_) ? QString::fromStdString(channel_->name()) : name_;
  74 }
  75
  76 QString SignalBase::internal_name() const
  77 {
  78         return internal_name_;
  79 }
  80
  81 void SignalBase::set_name(QString name)
  82 {
  83         if (channel_)
  84                 channel_->set_name(name.toUtf8().constData());
  85
  86         name_ = name;
  87
  88         name_changed(name);
  89 }
  90
  91 bool SignalBase::enabled() const
  92 {
  93         return (channel_) ? channel_->enabled() : true;
  94 }
  95
  96 void SignalBase::set_enabled(bool value)
  97 {
  98         if (channel_) {
  99                 channel_->set_enabled(value);
 100                 enabled_changed(value);
 101         }
 102 }
 103
 104 SignalBase::ChannelType SignalBase::type() const
 105 {
 106         return channel_type_;
 107 }
 108
 109 unsigned int SignalBase::index() const
 110 {
 111         return (channel_) ? channel_->index() : 0;
 112 }
 113
 114 unsigned int SignalBase::logic_bit_index() const
 115 {
 116         if (channel_type_ == LogicChannel)
 117                 return channel_->index();
 118         else
 119                 return 0;
 120 }
 121
 122 QColor SignalBase::colour() const
 123 {
 124         return colour_;
 125 }
 126
 127 void SignalBase::set_colour(QColor colour)
 128 {
 129         colour_ = colour;
 130
 131         bgcolour_ = colour;
 132         bgcolour_.setAlpha(ColourBGAlpha);
 133
 134         colour_changed(colour);
 135 }
 136
 137 QColor SignalBase::bgcolour() const
 138 {
 139         return bgcolour_;
 140 }
 141
 142 void SignalBase::set_data(shared_ptr<pv::data::SignalData> data)
 143 {
 144         if (data_) {
 145                 disconnect(data.get(), SIGNAL(samples_cleared()),
 146                         this, SLOT(on_samples_cleared()));
 147                 disconnect(data.get(), SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 148                         this, SLOT(on_samples_added(QObject*, uint64_t, uint64_t)));
 149
 150                 if (channel_type_ == AnalogChannel) {
 151                         shared_ptr<Analog> analog = analog_data();
 152                         assert(analog);
 153
 154                         disconnect(analog.get(), SIGNAL(min_max_changed(float, float)),
 155                                 this, SLOT(on_min_max_changed(float, float)));
 156                 }
 157         }
 158
 159         data_ = data;
 160
 161         if (data_) {
 162                 connect(data.get(), SIGNAL(samples_cleared()),
 163                         this, SLOT(on_samples_cleared()));
 164                 connect(data.get(), SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 165                         this, SLOT(on_samples_added(QObject*, uint64_t, uint64_t)));
 166
 167                 if (channel_type_ == AnalogChannel) {
 168                         shared_ptr<Analog> analog = analog_data();
 169                         assert(analog);
 170
 171                         connect(analog.get(), SIGNAL(min_max_changed(float, float)),
 172                                 this, SLOT(on_min_max_changed(float, float)));
 173                 }
 174         }
 175 }
 176
 177 shared_ptr<data::Analog> SignalBase::analog_data() const
 178 {
 179         shared_ptr<Analog> result = nullptr;
 180
 181         if (channel_type_ == AnalogChannel)
 182                 result = dynamic_pointer_cast<Analog>(data_);
 183
 184         return result;
 185 }
 186
 187 shared_ptr<data::Logic> SignalBase::logic_data() const
 188 {
 189         shared_ptr<Logic> result = nullptr;
 190
 191         if (channel_type_ == LogicChannel)
 192                 result = dynamic_pointer_cast<Logic>(data_);
 193
 194         if (((conversion_type_ == A2LConversionByThreshold) ||
 195                 (conversion_type_ == A2LConversionBySchmittTrigger)))
 196                 result = dynamic_pointer_cast<Logic>(converted_data_);
 197
 198         return result;
 199 }
 200
 201 SignalBase::ConversionType SignalBase::get_conversion_type() const
 202 {
 203         return conversion_type_;
 204 }
 205
 206 void SignalBase::set_conversion_type(ConversionType t)
 207 {
 208         if (conversion_type_ != NoConversion) {
 209                 stop_conversion();
 210
 211                 // Discard converted data
 212                 converted_data_.reset();
 213                 samples_cleared();
 214         }
 215
 216         conversion_type_ = t;
 217
 218         // Re-create an empty container
 219         // so that the signal is recognized as providing logic data
 220         // and thus can be assigned to a decoder
 221         if (conversion_is_a2l())
 222                 if (!converted_data_)
 223                         converted_data_ = make_shared<Logic>(1);  // Contains only one channel
 224
 225         start_conversion();
 226
 227         conversion_type_changed(t);
 228 }
 229
 230 map<QString, QVariant> SignalBase::get_conversion_options() const
 231 {
 232         return conversion_options_;
 233 }
 234
 235 bool SignalBase::set_conversion_option(QString key, QVariant value)
 236 {
 237         QVariant old_value;
 238
 239         auto key_iter = conversion_options_.find(key);
 240         if (key_iter != conversion_options_.end())
 241                 old_value = key_iter->second;
 242
 243         conversion_options_[key] = value;
 244
 245         return (value != old_value);
 246 }
 247
 248 vector<double> SignalBase::get_conversion_thresholds(const ConversionType t,
 249         const bool always_custom) const
 250 {
 251         vector<double> result;
 252         ConversionType conv_type = t;
 253         ConversionPreset preset;
 254
 255         // Use currently active conversion if no conversion type was supplied
 256         if (conv_type == NoConversion)
 257                 conv_type = conversion_type_;
 258
 259         if (always_custom)
 260                 preset = NoPreset;
 261         else
 262                 preset = get_current_conversion_preset();
 263
 264         if (conv_type == A2LConversionByThreshold) {
 265                 double thr = 0;
 266
 267                 if (preset == NoPreset) {
 268                         auto thr_iter = conversion_options_.find("threshold_value");
 269                         if (thr_iter != conversion_options_.end())
 270                                 thr = (thr_iter->second).toDouble();
 271                 }
 272
 273                 if (preset == DynamicPreset)
 274                         thr = (min_value_ + max_value_) * 0.5;  // middle between min and max
 275
 276                 if ((int)preset == 1) thr = 0.9;
 277                 if ((int)preset == 2) thr = 1.8;
 278                 if ((int)preset == 3) thr = 2.5;
 279                 if ((int)preset == 4) thr = 1.5;
 280
 281                 result.push_back(thr);
 282         }
 283
 284         if (conv_type == A2LConversionBySchmittTrigger) {
 285                 double thr_lo = 0, thr_hi = 0;
 286
 287                 if (preset == NoPreset) {
 288                         auto thr_lo_iter = conversion_options_.find("threshold_value_low");
 289                         if (thr_lo_iter != conversion_options_.end())
 290                                 thr_lo = (thr_lo_iter->second).toDouble();
 291
 292                         auto thr_hi_iter = conversion_options_.find("threshold_value_high");
 293                         if (thr_hi_iter != conversion_options_.end())
 294                                 thr_hi = (thr_hi_iter->second).toDouble();
 295                 }
 296
 297                 if (preset == DynamicPreset) {
 298                         const double amplitude = max_value_ - min_value_;
 299                         const double center = min_value_ + (amplitude / 2);
 300                         thr_lo = center - (amplitude * 0.15);  // 15% margin
 301                         thr_hi = center + (amplitude * 0.15);  // 15% margin
 302                 }
 303
 304                 if ((int)preset == 1) { thr_lo = 0.3; thr_hi = 1.2; }
 305                 if ((int)preset == 2) { thr_lo = 0.7; thr_hi = 2.5; }
 306                 if ((int)preset == 3) { thr_lo = 1.3; thr_hi = 3.7; }
 307                 if ((int)preset == 4) { thr_lo = 0.8; thr_hi = 2.0; }
 308
 309                 result.push_back(thr_lo);
 310                 result.push_back(thr_hi);
 311         }
 312
 313         return result;
 314 }
 315
 316 vector< pair<QString, int> > SignalBase::get_conversion_presets() const
 317 {
 318         vector< pair<QString, int> > presets;
 319
 320         if (conversion_type_ == A2LConversionByThreshold) {
 321                 // Source: http://www.interfacebus.com/voltage_threshold.html
 322                 presets.emplace_back(tr("Signal average"), 0);
 323                 presets.emplace_back(tr("0.9V (for 1.8V CMOS)"), 1);
 324                 presets.emplace_back(tr("1.8V (for 3.3V CMOS)"), 2);
 325                 presets.emplace_back(tr("2.5V (for 5.0V CMOS)"), 3);
 326                 presets.emplace_back(tr("1.5V (for TTL)"), 4);
 327         }
 328
 329         if (conversion_type_ == A2LConversionBySchmittTrigger) {
 330                 // Source: http://www.interfacebus.com/voltage_threshold.html
 331                 presets.emplace_back(tr("Signal average +/- 15%"), 0);
 332                 presets.emplace_back(tr("0.3V/1.2V (for 1.8V CMOS)"), 1);
 333                 presets.emplace_back(tr("0.7V/2.5V (for 3.3V CMOS)"), 2);
 334                 presets.emplace_back(tr("1.3V/3.7V (for 5.0V CMOS)"), 3);
 335                 presets.emplace_back(tr("0.8V/2.0V (for TTL)"), 4);
 336         }
 337
 338         return presets;
 339 }
 340
 341 SignalBase::ConversionPreset SignalBase::get_current_conversion_preset() const
 342 {
 343         auto preset = conversion_options_.find("preset");
 344         if (preset != conversion_options_.end())
 345                 return (ConversionPreset)((preset->second).toInt());
 346
 347         return DynamicPreset;
 348 }
 349
 350 void SignalBase::set_conversion_preset(ConversionPreset id)
 351 {
 352         conversion_options_["preset"] = (int)id;
 353 }
 354
 355 #ifdef ENABLE_DECODE
 356 bool SignalBase::is_decode_signal() const
 357 {
 358         return (channel_type_ == DecodeChannel);
 359 }
 360 #endif
 361
 362 void SignalBase::save_settings(QSettings &settings) const
 363 {
 364         settings.setValue("name", name());
 365         settings.setValue("enabled", enabled());
 366         settings.setValue("colour", colour());
 367         settings.setValue("conversion_type", (int)conversion_type_);
 368
 369         settings.setValue("conv_options", (int)(conversion_options_.size()));
 370         int i = 0;
 371         for (auto kvp : conversion_options_) {
 372                 settings.setValue(QString("conv_option%1_key").arg(i), kvp.first);
 373                 settings.setValue(QString("conv_option%1_value").arg(i), kvp.second);
 374                 i++;
 375         }
 376 }
 377
 378 void SignalBase::restore_settings(QSettings &settings)
 379 {
 380         set_name(settings.value("name").toString());
 381         set_enabled(settings.value("enabled").toBool());
 382         set_colour(settings.value("colour").value<QColor>());
 383         set_conversion_type((ConversionType)settings.value("conversion_type").toInt());
 384
 385         int conv_options = settings.value("conv_options").toInt();
 386
 387         if (conv_options)
 388                 for (int i = 0; i < conv_options; i++) {
 389                         QString key = settings.value(QString("conv_option%1_key").arg(i)).toString();
 390                         QVariant value = settings.value(QString("conv_option%1_value").arg(i));
 391                         conversion_options_[key] = value;
 392                 }
 393 }
 394
 395 bool SignalBase::conversion_is_a2l() const
 396 {
 397         return ((channel_type_ == AnalogChannel) &&
 398                 ((conversion_type_ == A2LConversionByThreshold) ||
 399                 (conversion_type_ == A2LConversionBySchmittTrigger)));
 400 }
 401
 402 void SignalBase::conversion_thread_proc(QObject* segment)
 403 {
 404         // TODO Support for multiple segments is missing
 405
 406         uint64_t start_sample, end_sample;
 407         start_sample = end_sample = 0;
 408
 409         do {
 410                 if (conversion_is_a2l()) {
 411
 412                         AnalogSegment *asegment = qobject_cast<AnalogSegment*>(segment);
 413
 414                         const shared_ptr<Logic> logic_data = dynamic_pointer_cast<Logic>(converted_data_);
 415
 416                         // Create the initial logic data segment if needed
 417                         if (logic_data->segments().size() == 0) {
 418                                 shared_ptr<LogicSegment> lsegment =
 419                                         make_shared<LogicSegment>(*logic_data.get(), 1, asegment->samplerate());
 420                                 logic_data->push_segment(lsegment);
 421                         }
 422
 423                         LogicSegment *lsegment = dynamic_cast<LogicSegment*>(logic_data->segments().front().get());
 424
 425                         start_sample = lsegment->get_sample_count();
 426                         end_sample = asegment->get_sample_count();
 427
 428                         if (end_sample > start_sample) {
 429                                 tie(min_value_, max_value_) = asegment->get_min_max();
 430
 431                                 // Create sigrok::Analog instance
 432                                 float *asamples = new float[ConversionBlockSize];
 433                                 uint8_t *lsamples = new uint8_t[ConversionBlockSize];
 434
 435                                 vector<shared_ptr<sigrok::Channel> > channels;
 436                                 channels.push_back(channel_);
 437
 438                                 vector<const sigrok::QuantityFlag*> mq_flags;
 439                                 const sigrok::Quantity * const mq = sigrok::Quantity::VOLTAGE;
 440                                 const sigrok::Unit * const unit = sigrok::Unit::VOLT;
 441
 442                                 shared_ptr<sigrok::Packet> packet =
 443                                         Session::sr_context->create_analog_packet(channels,
 444                                         asamples, ConversionBlockSize, mq, unit, mq_flags);
 445
 446                                 shared_ptr<sigrok::Analog> analog =
 447                                         dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 448
 449                                 // Convert
 450                                 uint64_t i = start_sample;
 451
 452                                 if (conversion_type_ == A2LConversionByThreshold) {
 453                                         const double threshold = get_conversion_thresholds()[0];
 454
 455                                         // Convert as many sample blocks as we can
 456                                         while ((end_sample - i) > ConversionBlockSize) {
 457                                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 458
 459                                                 shared_ptr<sigrok::Logic> logic =
 460                                                         analog->get_logic_via_threshold(threshold, lsamples);
 461
 462                                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 463
 464                                                 samples_added(lsegment, i, i + ConversionBlockSize);
 465                                                 i += ConversionBlockSize;
 466                                         }
 467
 468                                         // Re-create sigrok::Analog and convert remaining samples
 469                                         packet = Session::sr_context->create_analog_packet(channels,
 470                                                 asamples, end_sample - i, mq, unit, mq_flags);
 471
 472                                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 473
 474                                         asegment->get_samples(i, end_sample, asamples);
 475                                         shared_ptr<sigrok::Logic> logic =
 476                                                 analog->get_logic_via_threshold(threshold, lsamples);
 477                                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 478                                         samples_added(lsegment, i, end_sample);
 479                                 }
 480
 481                                 if (conversion_type_ == A2LConversionBySchmittTrigger) {
 482                                         const vector<double> thresholds = get_conversion_thresholds();
 483                                         const double lo_thr = thresholds[0];
 484                                         const double hi_thr = thresholds[1];
 485
 486                                         uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 0
 487
 488                                         // Convert as many sample blocks as we can
 489                                         while ((end_sample - i) > ConversionBlockSize) {
 490                                                 asegment->get_samples(i, i + ConversionBlockSize, asamples);
 491
 492                                                 shared_ptr<sigrok::Logic> logic =
 493                                                         analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 494                                                                 &state, lsamples);
 495
 496                                                 lsegment->append_payload(logic->data_pointer(), logic->data_length());
 497
 498                                                 samples_added(lsegment, i, i + ConversionBlockSize);
 499                                                 i += ConversionBlockSize;
 500                                         }
 501
 502                                         // Re-create sigrok::Analog and convert remaining samples
 503                                         packet = Session::sr_context->create_analog_packet(channels,
 504                                                 asamples, end_sample - i, mq, unit, mq_flags);
 505
 506                                         analog = dynamic_pointer_cast<sigrok::Analog>(packet->payload());
 507
 508                                         asegment->get_samples(i, end_sample, asamples);
 509                                         shared_ptr<sigrok::Logic> logic =
 510                                                 analog->get_logic_via_schmitt_trigger(lo_thr, hi_thr,
 511                                                         &state, lsamples);
 512                                         lsegment->append_payload(logic->data_pointer(), logic->data_length());
 513                                         samples_added(lsegment, i, end_sample);
 514                                 }
 515
 516                                 // If acquisition is ongoing, start-/endsample may have changed
 517                                 end_sample = asegment->get_sample_count();
 518
 519                                 delete[] lsamples;
 520                                 delete[] asamples;
 521                         }
 522                 }
 523
 524                 if (!conversion_interrupt_ && (start_sample == end_sample)) {
 525                         unique_lock<mutex> input_lock(conversion_input_mutex_);
 526                         conversion_input_cond_.wait(input_lock);
 527                 }
 528         } while (!conversion_interrupt_);
 529 }
 530
 531 void SignalBase::start_conversion(bool delayed_start)
 532 {
 533         if (delayed_start) {
 534                 delayed_conversion_starter_.start();
 535                 return;
 536         }
 537
 538         stop_conversion();
 539
 540         if (converted_data_)
 541                 converted_data_->clear();
 542         samples_cleared();
 543
 544         if (conversion_is_a2l()) {
 545                 shared_ptr<Analog> analog_data = dynamic_pointer_cast<Analog>(data_);
 546
 547                 if (analog_data->analog_segments().size() > 0) {
 548                         // TODO Support for multiple segments is missing
 549                         AnalogSegment *asegment = analog_data->analog_segments().front().get();
 550
 551                         conversion_interrupt_ = false;
 552                         conversion_thread_ = std::thread(
 553                                 &SignalBase::conversion_thread_proc, this, asegment);
 554                 }
 555         }
 556 }
 557
 558 void SignalBase::stop_conversion()
 559 {
 560         // Stop conversion so we can restart it from the beginning
 561         conversion_interrupt_ = true;
 562         conversion_input_cond_.notify_one();
 563         if (conversion_thread_.joinable())
 564                 conversion_thread_.join();
 565 }
 566
 567 void SignalBase::on_samples_cleared()
 568 {
 569         if (converted_data_)
 570                 converted_data_->clear();
 571
 572         samples_cleared();
 573 }
 574
 575 void SignalBase::on_samples_added(QObject* segment, uint64_t start_sample,
 576         uint64_t end_sample)
 577 {
 578         if (conversion_type_ != NoConversion) {
 579                 if (conversion_thread_.joinable()) {
 580                         // Notify the conversion thread since it's running
 581                         conversion_input_cond_.notify_one();
 582                 } else {
 583                         // Start the conversion thread unless the delay timer is running
 584                         if (!delayed_conversion_starter_.isActive())
 585                                 start_conversion();
 586                 }
 587         }
 588
 589         samples_added(segment, start_sample, end_sample);
 590 }
 591
 592 void SignalBase::on_min_max_changed(float min, float max)
 593 {
 594         // Restart conversion if one is enabled and uses a calculated threshold
 595         if ((conversion_type_ != NoConversion) &&
 596                 (get_current_conversion_preset() == DynamicPreset))
 597                 start_conversion(true);
 598
 599         min_max_changed(min, max);
 600 }
 601
 602 void SignalBase::on_capture_state_changed(int state)
 603 {
 604         if (state == Session::Running) {
 605                 // Restart conversion if one is enabled
 606                 if (conversion_type_ != NoConversion)
 607                         start_conversion();
 608         }
 609 }
 610
 611 void SignalBase::on_delayed_conversion_start()
 612 {
 613         start_conversion();
 614 }
 615
 616 } // namespace data
 617 } // namespace pv