//************************************ // Method: setupCLK // FullName: fetch::device::NationalInstrumentsDAQ::setupCLK // Access: public // Returns: void // Qualifier: // // set up counter for sample clock // - A finite pulse sequence is generated by a pair of on-board counters. // In testing, it appears that after the device is reset, initializing // the counter task doesn't work quite right. First, I have to start the // task with the paired counter once. Then, I can set things up normally. // After initializing with the paired counter once, things work fine until // the device (or computer) is reset. My guess is this is a fault of the // board or driver software. // - below, we just cycle the counters when config gets called. This ensures // everything configures correctly the first time, even after a device // reset or cold start. //************************************ void NationalInstrumentsDAQ::setupCLK(float64 nrecords, float64 record_frequency_Hz) { TaskHandle clk = 0; int32 N = _config->ao_samples_per_waveform(); float64 hz = computeSampleFrequency(nrecords, record_frequency_Hz); const char *dev =_config->name().c_str(), *ctr =_config->ctr().c_str(), *armstart_in =_config->armstart().c_str(), *gate_out =_config->frame_trigger_out().c_str(), *trig =_config->trigger().c_str(); float64 lvl =_config->level_volts(); char term_ctr[1024]={0}, term_gate[1024]={0}, term_arm_out[1024]={0}; make_terminal_name(term_ctr ,sizeof(term_ctr) ,dev,ctr); make_terminal_name(term_gate ,sizeof(term_gate) ,dev,ctr); strcat(term_gate,"Gate"); make_terminal_name(term_arm_out,sizeof(term_arm_out),dev,gate_out); DAQERR( DAQmxClearTask(_clk.daqtask) ); // Once a DAQ task is started, it needs to be cleared before restarting DAQERR( DAQmxCreateTask("fetch_CLK",&_clk.daqtask)); clk = _clk.daqtask; DAQERR(DAQmxCreateCOPulseChanFreq (clk,term_ctr,NULL,DAQmx_Val_Hz,DAQmx_Val_Low,0.0,hz,0.5)); DAQERR(DAQmxCfgImplicitTiming (clk,DAQmx_Val_FiniteSamps,N)); DAQERR(DAQmxCfgDigEdgeStartTrig (clk,"AnalogComparisonEvent",DAQmx_Val_Rising)); DAQERR(DAQmxSetArmStartTrigType (clk,DAQmx_Val_DigEdge)); // Arm trigger has to be through clk DAQERR(DAQmxSetDigEdgeArmStartTrigSrc (clk,armstart_in)); DAQERR(DAQmxSetDigEdgeArmStartTrigEdge(clk,DAQmx_Val_Rising)); DAQERR(DAQmxSetStartTrigRetriggerable (clk,1)); DAQERR(DAQmxConnectTerms(term_gate,term_arm_out,DAQmx_Val_DoNotInvertPolarity)); }
void ScanThreadLinear::InitializeSyncAndScan(void) { //CLEAR TASKS DAQmxClearTask(taskClock); DAQmxClearTask(taskTrig); DAQmxClearTask(taskTrA); DAQmxClearTask(taskAnalog); Samps = globalOptions->IMAGEHEIGHT+NumPtsDw; LineRate = Samps*FrameRate; //CREATE TASKS DAQmxCreateTask("",&taskAnalog); DAQmxCreateTask("",&taskTrig); DAQmxCreateTask("",&taskTrA); DAQmxCreateTask("",&taskClock); /************************* CLOCK SOURCE *************************/ //CREATE INTERNAL CLOCK SOURCE DAQmxCreateCOPulseChanFreq(taskClock, "Dev1/ctr0", "", DAQmx_Val_Hz, DAQmx_Val_Low, __DDELAY, FrameRate, .2); /************************* DIGITAL PULSE TRAIN *************************/ //CREATE DIGITAL LINE DAQmxCreateDOChan(taskTrig,"Dev1/port0/line0","",DAQmx_Val_ChanPerLine); //SET TIMING AND STATE CLOCK SOURCE //Clock source is based off the analog sample clock DAQmxCfgSampClkTiming(taskTrig,"ao/SampleClock",FrameRate*Samps, DAQmx_Val_Rising,DAQmx_Val_ContSamps,Samps); /************************* ANALOG SAW TOOTH *************************/ //CREATE ANALOG CHANNEL DAQmxCreateAOVoltageChan(taskAnalog,"Dev1/ao0", "",-10,10.0,DAQmx_Val_Volts,NULL); DAQmxCreateAOVoltageChan(taskAnalog,"Dev1/ao1", "",-10,10.0,DAQmx_Val_Volts,NULL); //SET TIMING DAQmxCfgSampClkTiming(taskAnalog,"",FrameRate*Samps, DAQmx_Val_Rising,DAQmx_Val_ContSamps,Samps); //GET TERMINAL NAME OF THE TRIGGER SOURCE GetTerminalNameWithDevPrefix(taskTrig, "Ctr0InternalOutput",trigName); //TRIGGER THE ANALOG DATA BASED OFF INTERNAL TRIGGER (CLOCK SOURCE) DAQmxCfgDigEdgeStartTrig(taskAnalog,trigName,DAQmx_Val_Rising); if (globalOptions->bVolumeScan == false) { GenSawTooth(Samps,XScanVolts_mV,XScanOffset_mV,ScanBuff); for (int i = 0; i< Samps; i++) VolBuff[i] = ScanBuff[i]; for (int i = Samps; i < 2*Samps; i++) VolBuff[i] = YScanOffset_mV/1000; DAQmxWriteAnalogF64(taskAnalog, Samps, false ,10 ,DAQmx_Val_GroupByChannel, VolBuff,NULL,NULL); //GENERATE PULSE TRAIN TO TRIGGER CAMERA GenPulseTrain(Samps,digiBuff); DAQmxWriteDigitalLines(taskTrig,Samps,false,10.0,DAQmx_Val_GroupByChannel,digiBuff,NULL,NULL); } else { int frameCount; GenSawTooth(Samps,XScanVolts_mV,XScanOffset_mV,ScanBuff); for (frameCount = 0; frameCount < globalOptions->NumFramesPerVol; frameCount++) { for (int i = 0; i< Samps; i++) VolumeBuff[i+frameCount*Samps] = ScanBuff[i]; } GenStairCase(Samps,globalOptions->NumFramesPerVol,YScanVolts_mV, YScanOffset_mV, tempBuff); for (int i = 0; i < Samps*globalOptions->NumFramesPerVol; i++) VolumeBuff[i + Samps*globalOptions->NumFramesPerVol] = tempBuff[i]; DAQmxWriteAnalogF64(taskAnalog, Samps*globalOptions->NumFramesPerVol, false ,10 ,DAQmx_Val_GroupByChannel, VolumeBuff,NULL,NULL); //GENERATE PULSE TRAIN TO TRIGGER CAMERA for (int frameCount = 0; frameCount < globalOptions->NumFramesPerVol; frameCount++) { GenPulseTrain(Samps,digiBuff); for (int i = 0; i< Samps; i++) digiVolBuff[i+frameCount*Samps] = digiBuff[i]; } DAQmxWriteDigitalLines(taskTrig,Samps*globalOptions->NumFramesPerVol,false,10.0,DAQmx_Val_GroupByChannel,digiVolBuff,NULL,NULL); } //GENERATE PULSE TRAIN TO TRIGGER CAMERA DAQmxCreateCOPulseChanFreq(taskTrA,"Dev1/ctr1","",DAQmx_Val_Hz,DAQmx_Val_Low,0.0,LineRate,0.2); DAQmxCfgImplicitTiming(taskTrA,DAQmx_Val_FiniteSamps,globalOptions->IMAGEHEIGHT); DAQmxCfgDigEdgeStartTrig(taskTrA,"/Dev1/PFI4",DAQmx_Val_Rising); DAQmxSetStartTrigRetriggerable(taskTrA, 1); DAQmxConnectTerms ("/Dev1/Ctr1InternalOutput", "/Dev1/RTSI0", DAQmx_Val_DoNotInvertPolarity); //START TASKS //IMPORTANT - Need to arm analog task first to make sure that the digital and analog waveforms are in sync DAQmxStartTask(taskAnalog); DAQmxStartTask(taskTrA); DAQmxStartTask(taskTrig); DAQmxStartTask(taskClock); }