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+/********************************************************************\
+
+  Name:         drs_exam.cpp
+  Created by:   Stefan Ritt
+
+  Contents:     Simple example application to read out a DRS4
+                evaluation board
+
+  $Id: drs_exam.cpp 21308 2014-04-11 14:50:16Z ritt $
+
+\********************************************************************/
+
+#include <math.h>
+
+#ifdef _MSC_VER
+
+#include <windows.h>
+
+#elif defined(OS_LINUX)
+
+#define O_BINARY 0
+
+#include <unistd.h>
+#include <ctype.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#define DIR_SEPARATOR '/'
+
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "strlcpy.h"
+#include "DRS.h"
+
+/*------------------------------------------------------------------*/
+
+int main()
+{
+   int i, j, nBoards;
+   DRS *drs;
+   DRSBoard *b;
+   float time_array[8][1024];
+   float wave_array[8][1024];
+   FILE  *f;
+
+   /* do initial scan */
+   drs = new DRS();
+
+   /* show any found board(s) */
+   for (i=0 ; i<drs->GetNumberOfBoards() ; i++) {
+      b = drs->GetBoard(i);
+      printf("Found DRS4 evaluation board, serial #%d, firmware revision %d\n", 
+         b->GetBoardSerialNumber(), b->GetFirmwareVersion());
+   }
+
+   /* exit if no board found */
+   nBoards = drs->GetNumberOfBoards();
+   if (nBoards == 0) {
+      printf("No DRS4 evaluation board found\n");
+      return 0;
+   }
+
+   /* continue working with first board only */
+   b = drs->GetBoard(0);
+
+   /* initialize board */
+   b->Init();
+
+   /* set sampling frequency */
+   b->SetFrequency(5, true);
+
+   /* enable transparent mode needed for analog trigger */
+   b->SetTranspMode(1);
+
+   /* set input range to -0.5V ... +0.5V */
+   b->SetInputRange(0);
+
+   /* use following line to set range to 0..1V */
+   //b->SetInputRange(0.5);
+   
+   /* use following line to turn on the internal 100 MHz clock connected to all channels  */
+   b->EnableTcal(1);
+
+   /* use following lines to enable hardware trigger on CH1 at 50 mV positive edge */
+   if (b->GetBoardType() >= 8) {        // Evaluaiton Board V4&5
+      b->EnableTrigger(1, 0);           // enable hardware trigger
+      b->SetTriggerSource(1<<0);        // set CH1 as source
+   } else if (b->GetBoardType() == 7) { // Evaluation Board V3
+      b->EnableTrigger(0, 1);           // lemo off, analog trigger on
+      b->SetTriggerSource(0);           // use CH1 as source
+   }
+   b->SetTriggerLevel(0.05);            // 0.05 V
+   b->SetTriggerPolarity(false);        // positive edge
+   
+   /* use following lines to set individual trigger elvels */
+   //b->SetIndividualTriggerLevel(1, 0.1);
+   //b->SetIndividualTriggerLevel(2, 0.2);
+   //b->SetIndividualTriggerLevel(3, 0.3);
+   //b->SetIndividualTriggerLevel(4, 0.4);
+   //b->SetTriggerSource(15);
+   
+   b->SetTriggerDelayNs(0);             // zero ns trigger delay
+   
+   /* use following lines to enable the external trigger */
+   //if (b->GetBoardType() == 8) {     // Evaluaiton Board V4
+   //   b->EnableTrigger(1, 0);           // enable hardware trigger
+   //   b->SetTriggerSource(1<<4);        // set external trigger as source
+   //} else {                          // Evaluation Board V3
+   //   b->EnableTrigger(1, 0);           // lemo on, analog trigger off
+   // }
+
+   /* open file to save waveforms */
+   f = fopen("data.txt", "w");
+   if (f == NULL) {
+      perror("ERROR: Cannot open file \"data.txt\"");
+      return 1;
+   }
+   
+   /* repeat ten times */
+   for (j=0 ; j<10 ; j++) {
+
+      /* start board (activate domino wave) */
+      b->StartDomino();
+
+      /* wait for trigger */
+      printf("Waiting for trigger...");
+      
+      fflush(stdout);
+      while (b->IsBusy());
+
+      /* read all waveforms */
+      b->TransferWaves(0, 8);
+
+      /* read time (X) array of first channel in ns */
+      b->GetTime(0, 0, b->GetTriggerCell(0), time_array[0]);
+
+      /* decode waveform (Y) array of first channel in mV */
+      b->GetWave(0, 0, wave_array[0]);
+
+      /* read time (X) array of second channel in ns
+       Note: On the evaluation board input #1 is connected to channel 0 and 1 of
+       the DRS chip, input #2 is connected to channel 2 and 3 and so on. So to
+       get the input #2 we have to read DRS channel #2, not #1. */
+      b->GetTime(0, 2, b->GetTriggerCell(0), time_array[1]);
+
+      /* decode waveform (Y) array of second channel in mV */
+      b->GetWave(0, 2, wave_array[1]);
+
+      /* Save waveform: X=time_array[i], Yn=wave_array[n][i] */
+      fprintf(f, "Event #%d ----------------------\n  t1[ns]  u1[mV]  t2[ns] u2[mV]\n", j);
+      for (i=0 ; i<1024 ; i++)
+         fprintf(f, "%7.3f %7.1f %7.3f %7.1f\n", time_array[0][i], wave_array[0][i], time_array[1][i], wave_array[1][i]);
+
+      /* print some progress indication */
+      printf("\rEvent #%d read successfully\n", j);
+   }
+
+   fclose(f);
+   
+   /* delete DRS object -> close USB connection */
+   delete drs;
+}