GeneratorTriggeredBurst.cpp

/**
 * GeneratorTriggeredBurst.cpp - for LibTiePie 0.5+
 *
 * This example generates a 100 kHz square waveform, 25% duty cycle, 0..5 V, 20 periods, this waveform is triggered by the external trigger (EXT 1).
 * Connect EXT 1 to GND to trigger the burst.
 *
 * Find more information on http://www.tiepie.com/LibTiePie .
 */

#include 
#include 
#include "libtiepie++.h"
#include "PrintInfo.h"

#if defined(__linux) || defined(__unix)
  #include 
#endif

using namespace std;
using namespace LibTiePie;

int main()
{
  int status = EXIT_SUCCESS;

  // Initialize library:
  Library::init();

  // Print library information:
  printLibraryInfo();

  // Update device list:
  DeviceList::update();

  // Try to open a generator with triggered burst support:
  Generator* gen = 0;

  for(uint32_t index = 0; index < DeviceList::count(); index++)
  {
    DeviceListItem* item = DeviceList::getItemByIndex(index);

    if(item->canOpen(DEVICETYPE_GENERATOR) && (gen = item->openGenerator()))
    {
      // Check for triggered burst support:
      if(!((gen->modes() & GM_BURST_COUNT) && (gen->triggerInputs.count() > 0)))
      {
        delete gen;
        gen = 0;
      }
    }

    delete item;

    if(gen)
    {
      break;
    }
  }

  if(gen)
  {
    try
    {
      // Set signal type:
      gen->setSignalType(ST_SQUARE);

      // Set frequency:
      gen->setFrequency(100e3); // 100 kHz

      // Set amplitude:
      gen->setAmplitude(2.5); // 2.5 V

      // Set offset:
      gen->setOffset(2.5); // 2.5 V

      // Set symmetry (duty cycle):
      gen->setSymmetry(0.25); // 25 %

      // Set mode:
      gen->setMode(GM_BURST_COUNT);

      // Set burst count:
      gen->setBurstCount(20); // 20 periods

      // Locate trigger input:
      TriggerInput* triggerInput = gen->triggerInputs.getById(TIID_EXT1); // EXT 1

      if(!triggerInput)
      {
        triggerInput = gen->triggerInputs.getById(TIID_EXT2); // EXT 2
      }

      if(!triggerInput)
      {
        throw std::runtime_error("Unknown trigger input!");
      }

      // Enable trigger input:
      triggerInput->setEnabled(true);

      // Set trigger input kind:
      triggerInput->setKind(TK_FALLINGEDGE);

      // Enable output:
      gen->setOutputOn(true);

      // Print generator info:
      printDeviceInfo(gen);

      // Start signal generation:
      gen->start();

      // Wait for keystroke:
      cout << "Press Enter to stop signal generation..." << endl;
      while(cin.get() != '\n');

      // Stop generator:
      gen->stop();

      // Disable output:
      gen->setOutputOn(false);
    }
    catch(const exception& e)
    {
      cerr << "Exception: " << e.what() << endl;
      status = EXIT_FAILURE;
    }

    // Close generator:
    delete gen;
  }
  else
  {
    cerr << "No generator available with triggered burst support!" << endl;
    status = EXIT_FAILURE;
  }

  // Exit library:
  Library::exit();

  return status;
}