Measurement Computing Personal Daq rev.6.0 - Manual (Page 140)

B-8 API Commands Appendix B, 887095 Personal Daq User’s Manual
daqAdcRdScanN
DLL Function daqAdcRdScanN(DaqHandleT handle, DWORD startChan, DWORD endChan, PVOID buf,
DWORD scanCount, daqAdcTriggerSource triggerSource, BOOL rising, FLOAT level, FLOAT
freq, daqAdcGain gain, DWORD flags);
C daqAdcRdScanN(DaqHandleT handle, DWORD startChan, DWORD endChan, PVOID buf,
DWORD scanCount, DaqAdcTriggerSource triggerSource, BOOL rising, FLOAT level, FLOAT
freq, DaqAdcGain gain, DWORD flags);
Visual BASIC VBdaqAdcRdScanNSingle&(ByVal handle&, ByVal startChan&, ByVal endChan&, buf!(),
ByVal ScanCount&, ByVal triggerSource&, ByVal rising&, ByVal level!, ByVal Freq!,
ByVal gain&, ByVal flags&)
Delphi daqAdcRdScanN(handle:DaqHandleT; startChan:DWORD; endChan:DWORD; buf:pointer;
scanCount:DWORD; triggerSource:daqAdcTriggerSource; rising:longbool; level:single;
freq:single; const gain:daqAdcGain; flags:DWORD)
handle Handle to the device from which ADC scans are to be acquired
startchan The starting channel of the scan group (see table at end of appendix)
endchan The ending channel of the scan group (see table at end of appendix)
buf An array where the A/D scans will be placed
scanCount The number of scans to be read ; Valid values: 1 - 65536
triggerSource The trigger source (see table at end of appendix)
rising Boolean flag to indicate the rising or falling edge for the trigger source
level The trigger level if an analog trigger is specified; Valid values: 0 -4095
freq The sampling frequency in Hz; Valid values: 100000.0 - 0.0002
gain The channel gain (See tables at end of appendix).
Parameters
flags Channel configuration flags in the form of a bit mask.
DerrInvGain Invalid gain
DerrInvChan Invalid channel
DerrInvTrigSource Invalid trigger
DerrInvLevel Invalid Level
DerrFIFOFull Buffer Overrun
Returns
DerrNoError No error
See Also daqAdcRd, daqAdcRdN, daqAdcRdScan, daqAdcSetClock, daqAdcSetTrig
Program References None
Used With All devices
Description
daqAdcRdScanN reads multiple scans from multiple A/D channels. This function will configure the pacer clock, arm the trigger and acquire
count scans consisting of each channel, starting with startChan and ending with endChan. The gain setting will be applied to all
channels. The freq parameter is used to set the acquisition frequency. See ADC Flags Definition table for channel flags parameter
definition.