public static void stop_execution(niFgen niFgenObj, niScope niScopeObj)
{
niFgenObj.AbortGeneration();
Debug.WriteLine("[NIFGEN] Generation aborted.");
niFgenObj.ClearArbMemory();
Debug.WriteLine("[NIFGEN] Memory cleared.");
niFgenObj.Dispose();
Debug.WriteLine("[NIFGEN] Successfully disposed.");
niScopeObj.Abort();
Debug.WriteLine("[NISCOPE] Acquisition aborted.");
niScopeObj.Dispose();
Debug.WriteLine("[NISCOPE] Successfully disposed.");
}
public void RXThread()
{
// Acquisition parameters
string NISCOPE_resource_name = "PXI1Slot5";
string NISCOPE_channel_name = (string)"1";
int NISCOPE_num_waveform = 1;
double NISCOPE_sample_rate = fs_rx;
// Configure vertical properties of the acquisition
int NISCOPE_coupling = niScopeConstants.Dc;
double NISCOPE_vertical_range = 3; //%1;% 5M %%1.3M: % without amp 0.4;% with amplifier 0.5;
double NISCOPE_vertical_offset = 0;
int NISCOPE_probe_attenuation = 1; // %%1.3M % without amplifier 10;% with amplifier 1;
int NISCOPE_impedance = 50;
// Horizontal properties of the acquisition
int NISCOPE_min_record_length = 1000; // default = 1000
double NISCOPE_ref_position = 0; // default = 50%
// Trigger properties
double NISCOPE_trigger_holdoff = 0;
double NISCOPE_trigger_delay = 0;
// Fetch parameters
int NISCOPE_max_per_fetch;
double NISCOPE_timeout = 0;
short[] waveform16;
// double[] waveformD;
// short[] niscope_data;
// short[] niscope_all_data;
// double[] niscope_data;
niScopeWfmInfo[] waveform_info = new niScopeWfmInfo[NISCOPE_num_waveform];
int cnt_acq = 1;
niScopeObj = new niScope(NISCOPE_resource_name, true, true);
niScopeObj.AutoSetup();
Debug.WriteLine("[NISCOPE] Auto setup");
niScopeObj.ConfigureVertical(NISCOPE_channel_name, NISCOPE_vertical_range, NISCOPE_vertical_offset, NISCOPE_coupling, NISCOPE_probe_attenuation, true);
Debug.WriteLine("[NISCOPE] Configured vertical");
niScopeObj.ConfigureChanCharacteristics(NISCOPE_channel_name, NISCOPE_impedance, NISCOPE_sample_rate);
Debug.WriteLine("[NISCOPE] Configured channel char");
niScopeObj.ConfigureHorizontalTiming(NISCOPE_sample_rate, NISCOPE_min_record_length, NISCOPE_ref_position, NISCOPE_num_waveform, true);
Debug.WriteLine("[NISCOPE] Configured horixontal");
niScopeObj.ConfigureTriggerSoftware(NISCOPE_trigger_holdoff, NISCOPE_trigger_delay);
Debug.WriteLine("[NISCOPE] Configured trigger");
niScopeObj.SetInt32(niScopeProperties.FetchRelativeTo, niScopeConstants.ReadPointer);
Debug.WriteLine(niScopeObj.GetInt32(niScopeProperties.FetchRelativeTo));
int mem = niScopeObj.GetInt32(niScopeProperties.OnboardMemorySize);
Debug.WriteLine("[NISCOPE] Available memory {0}", mem);
NISCOPE_max_per_fetch = (int)mem / 16;
Debug.WriteLine("[NISCOPE] Max per fetch {0}", NISCOPE_max_per_fetch);
// waveform16 = new short[NISCOPE_max_per_fetch];
// waveformD = new double[NISCOPE_max_per_fetch];
// niscope_data = new short[(int)mem / 4];
// niscope_all_data = new short[(int)mem / 4];
// niscope_data = new double[(int)mem / 4];
// Debug.WriteLine("[NISCOPE] Circular buffer length {0}", niscope_data.Length);
// int last_write = 0;
int last_all_write = 0;
var watch2 = System.Diagnostics.Stopwatch.StartNew();
// watch2.Restart();
// while (watch2.ElapsedMilliseconds < 1000) ;
// watch2.Stop();
while (!(nifgen_configured))
{
;
}
try
{
// Thread.Sleep(400);
// while (!(niMT.nifgen_initiated)) ;
niScopeObj.InitiateAcquisition();
Debug.WriteLine("[NISCOPE] Initiated scope.");
// niscope_initiated = true;
var watch_total = System.Diagnostics.Stopwatch.StartNew();
int[] corr_array = { 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, 1, -1, 1 };
double barker_th = 5.0 * NISCOPE_vertical_range / 2.0;
int corr_length = corr_array.Length;
int n_guard = (int)(fs_rx / fsym_tx);
int n_ahead = n_guard;
int n_prev = n_ahead + corr_length + 1;
short[] x_rec_prev = new short[n_prev];
bool data_started = false;
bool data_ended = true;
bool data_started_here;
int prev_written_count = 0;
int total_fetched = 0;
int local_fetched;
double fetch_gain;
double fetch_offset;
double fetch_gain_prev = 0;
double fetch_offset_prev = 0;
double corr_first_old = 0;
double corr_end_old = 0;
int corr_first_peak_idx = 0;
int corr_end_peak_idx = -(n_ahead + 1);
double corr_first;
double corr_end;
int i_end;
int rx_data_buffer_length = rx_data_buffer.Length;
int ctr = 0;
while (ctr < rx_data_buffer_length - 1)
{
data_started_here = false;
// watch2.Restart();
// niScopeObj.Fetch(NISCOPE_channel_name, NISCOPE_timeout, NISCOPE_max_per_fetch, waveformD, waveform_info);
waveform16 = new short[NISCOPE_max_per_fetch];
RXwatch.Start();
niScopeObj.FetchBinary16(NISCOPE_channel_name, NISCOPE_timeout, NISCOPE_max_per_fetch, waveform16, waveform_info);
// watch2.Stop();
// Debug.WriteLine("[NISCOPE] Fetched {0}", waveform_info[0].ActualSamples);
// Debug.WriteLine("[NISCOPE] Fetched waveform #{0}, length {1}, took {2} ticks, gain {3}", cnt_acq, waveform_info[0].ActualSamples, watch2.ElapsedTicks, waveform_info[0].Gain);
cnt_acq += 1;
try
{
// watch2.Restart();
// Buffer.BlockCopy(waveformD, 0, niscope_data, last_write, waveform_info[0].ActualSamples * sizeof(double));
// last_write += waveform_info[0].ActualSamples * sizeof(double);
// watch2.Stop();
// Debug.WriteLine("[NISCOPE] Wrote to buffer. Took {0} ticks.", watch2.ElapsedTicks);
fetch_gain = waveform_info[0].Gain;
fetch_offset = waveform_info[0].Offset;
local_fetched = waveform_info[0].ActualSamples;
for (int i = 0; i < local_fetched; i++)
{
corr_first = 0;
corr_end = 0;
i_end = i + n_ahead;
for (int j = 0; j < corr_length; j++)
{
if (data_started)
{
if (i_end + j < n_prev)
{
corr_end += ((x_rec_prev[i_end + j] - fetch_offset_prev) * fetch_gain_prev) * corr_array[j];
}
else
{
corr_end += ((waveform16[i_end + j - n_prev] - fetch_offset) * fetch_gain) * corr_array[j];
}
}
else if (data_ended && (i > (corr_end_peak_idx + n_ahead)))
{
if (i + j < n_prev)
{
corr_first += ((x_rec_prev[i + j] - fetch_offset_prev) * fetch_gain_prev) * corr_array[j];
}
else
{
corr_first += ((waveform16[i + j - n_prev] - fetch_offset) * fetch_gain) * corr_array[j];
}
}
}
if (data_started)
{
if ((corr_end > barker_th))
{/*
* // Cross correlation exceeded threshold
* if (corr_end > corr_end_old)
* {
* // Correlation is still increasing
* corr_end_old = corr_end;
* }
* else
* {*/
// We reached correlation peak in the previous sample
Debug.WriteLine("Data ended {0}", i);
data_ended = true;
data_started = false;
corr_end_old = 0;
corr_end_peak_idx = i;
// }
}
}
else if (data_ended && (i > (corr_end_peak_idx + n_ahead)))
{
if ((corr_first > barker_th))
{
/*// Cross correlation exceeded threshold
* if (corr_first > corr_first_old)
* {
* // Correlation is still increasing
* corr_first_old = corr_first;
* }
* else
* {*/
Debug.WriteLine("Data started {0} threshold {1} corr {2}", i, barker_th, corr_first);
// We reached correlation peak in the previous sample
corr_first_peak_idx = i;
data_started = true;
data_started_here = true;
data_ended = false;
corr_first_old = 0;
// }
}
}
if (!data_ended && ((data_started && !data_started_here) || (data_started && data_started_here && (i > corr_first_peak_idx + n_guard + corr_length - 1))))
{
if (i < n_prev)
{
// niscope_data[last_write] = x_rec_prev[i];
rx_data_buffer[rx_data_buffer_last_write] = x_rec_prev[i];
}
else
{
// niscope_data[last_write] = waveform16[i - n_prev];
rx_data_buffer[rx_data_buffer_last_write] = waveform16[i - n_prev];
}
rx_data_buffer_last_write += 1;
}
}
Buffer.BlockCopy(waveform16, (local_fetched - n_prev) * sizeof(short), x_rec_prev, 0, n_prev * sizeof(short));
total_fetched += local_fetched;
Debug.WriteLine("[NISCOPE] Total fetched {0}, local fetched {1}, exceeding threshold {2} data started? {3} data ended? {4}", total_fetched, local_fetched - corr_length + 1, rx_data_buffer_last_write - prev_written_count, data_started, data_ended);
prev_written_count = rx_data_buffer_last_write;
ctr = rx_data_buffer_last_write;
fetch_gain_prev = fetch_gain;
fetch_offset_prev = fetch_offset;
// Buffer.BlockCopy(waveform16, 0, niscope_all_data, last_all_write, local_fetched * sizeof(short));
last_all_write += local_fetched * sizeof(short);
corr_end_peak_idx = 0;
}
catch (Exception e)
{
watch_total.Stop();
Debug.WriteLine("[NISCOPE] Rethrowing exception {0}", e);
Debug.WriteLine("[NISCOPE] Last write {0}", rx_data_buffer_last_write);
Debug.WriteLine("[NISCOPE] Totalruntime {0}", watch_total.ElapsedTicks);
// string file_name = "rx_waveform_fc" + fc.ToString() + "_fsym_tx" + fsym_tx.ToString() + "_fs_tx" + fs_tx.ToString() + "_fs_rx" + fs_rx.ToString() + ".txt";
// int file_ctr = 1;
// string new_file_name;
// do
// {
// new_file_name = file_ctr.ToString() + file_name;
// file_ctr += 1;
// } while (File.Exists(new_file_name));
//
// File.WriteAllLines(new_file_name, niscope_data.Select(d => d.ToString()));
throw;
}
// watch2.Restart();
// File.AppendAllLines(@"waveform.txt", waveform.Select(d => d.ToString()));
// watch2.Stop();
// Debug.WriteLine("[NISCOPE] Wrote to file. Took {0} ticks.", watch2.ElapsedTicks);
}
// File.AppendAllText(@"DebugFFMPEG.txt", now.TimeOfDay.ToString() + ffmpegProg + Environment.NewLine);
}
catch (Exception e)
{
Debug.WriteLine("[NISCOPE] Exception caught {0}", e);
niScopeObj.Abort();
Debug.WriteLine("[NISCOPE] Acquisition aborted.");
niScopeObj.Dispose();
Debug.WriteLine("[NISCOPE] Successfully disposed.");
niscope_ended = true;
// write rx signal
/* string file_name = "rx_waveform_fc" + fc.ToString() + "_fsym_tx" + fsym_tx.ToString() + "_fs_tx" + fs_tx.ToString() + "_fs_rx" + fs_rx.ToString() + "_webcam" + (webcam_bool ? 1 : 0).ToString() + "_tx_range" + byte_range.ToString() + ".txt";
* int file_ctr = 1;
* string new_file_name;
* do
* {
* new_file_name = file_ctr.ToString() + file_name;
* file_ctr += 1;
* } while (File.Exists(new_file_name));
*
* // File.WriteAllLines(new_file_name, niscope_data.Select(d => d.ToString()));
* string file_name2 = "rx_all_waveform_fc" + fc.ToString() + "_fsym_tx" + fsym_tx.ToString() + "_fs_tx" + fs_tx.ToString() + "_fs_rx" + fs_rx.ToString() + "_webcam" + (webcam_bool ? 1 : 0).ToString() + "_tx_range" + byte_range.ToString() + ".txt";
* string new_file_name2 = (file_ctr-1).ToString() + file_name2;
* // File.WriteAllLines(new_file_name2, niscope_all_data.Select(d => d.ToString()));
*
* stop_execution(niFgenObj, niScopeObj);
* */
}
}
