//************************************
// 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);
}
