int trigger_setup(TriggerMode tMode, TriggerSource tSource, double trigLevel)
{
rs = SetTriggerMode(tMode);
ReturnCheck(rs);
rs = SetTriggerSource(tSource);
ReturnCheck(rs);
rs = SetIFPowerTriggerLevel(trigLevel);
ReturnCheck(rs);
return 0;
}
void TiePieHS3::sample_after_external_trigger(double _rate, size_t _samples, double _sensitivity ,size_t _resolution) {
ADC_Abort();
/* set autoranging off */
SetAutoRanging(Ch1,0);
SetAutoRanging(Ch2,0);
samples=_samples;
if (samples==0 || _rate<=0) return;
unsigned short int retval;
//samples=1024*1024*1024; // impossible value... provoke error
retval=SetRecordLength(samples);
if (0!=retval) {
char buffer[256];
snprintf(buffer, sizeof(buffer), "could not set record length: SetRecrodLength(%d) returned %d", samples, retval);
throw ADC_exception(std::string(buffer));
}
if (0!=SetPostSamples(samples)){
throw ADC_exception("could not set post sample number");
}
fprintf(stderr,"set sample number to %d\n",samples);
/* set sampling frequency */
unsigned int freq=(unsigned int)fabs(floor(_rate)+0.5);
unsigned int freq_req=freq;
SetSampleFrequency(&freq_req);
if (freq!=freq_req)
throw ADC_exception("requested frequency could not be set");
rate=freq_req;
fprintf(stderr,"set rate to %g\n",rate);
/* set resolution */
if (0!=SetResolution(_resolution))
throw ADC_exception("could not set resolution");
unsigned char resolution_set;
GetResolution(&resolution_set);
if (_resolution!=resolution_set)
throw ADC_exception("requested resolution not supported");
resolution=_resolution;
fprintf(stderr,"set resolution to %d\n",resolution);
#if 0
/* set DC level value to zero */
const double dclevel_req=-2.0;
if (E_NO_ERRORS!=SetDcLevel(1, dclevel_req))
throw ADC_exception("could not set dc level for channel 1");
if (E_NO_ERRORS!=SetDcLevel(2, dclevel_req))
throw ADC_exception("could not set dc level for channel 2");
#endif
/* set input sensitivity for both channels */
double sensitivity_req1=_sensitivity;
SetSensitivity(1,&sensitivity_req1);
double sensitivity_req2=_sensitivity;
SetSensitivity(2,&sensitivity_req2);
if (sensitivity_req1!=_sensitivity || sensitivity_req2!=_sensitivity)
throw ADC_exception("requested sensitivity could not be set");
sensitivity=_sensitivity;
fprintf(stderr,"set sensitivity to %g\n",sensitivity);
/* set input coupling to DC */
if (0!=SetCoupling(Ch1, ctDC) || 0!=SetCoupling(Ch2, ctDC))
throw ADC_exception("could not set coupling to dc");
/* what to measure */
if (E_NO_ERRORS!=SetMeasureMode(mmCh12)) /* Channel 1 and 2 */
throw ADC_exception("could not set measurement mode");
/* the trigger source */
if (E_NO_ERRORS!=SetTriggerSource(tsExternal)) /* external trigger */
throw ADC_exception("could not set trigger source");
/* which slope to trigger */
if (E_NO_ERRORS!=SetTriggerMode(tmRising)) /* 0=Rising slope */
throw ADC_exception("could not set trigger source");
/* set transfer mode */
if (E_NO_ERRORS!=SetTransferMode(tmBlock))
throw ADC_exception("could not set transfer mode");
/* finally start the measurement */
if (0!=ADC_Start())
throw ADC_exception("could not start triggered adc measurement");
fprintf(stderr,"started triggered adc measurement with %d samples, rate=%g, sensitivity=%g, resolution=%d\n",samples,rate,sensitivity,resolution);
}
