Daqadcsetmux, Daqadcsetrate – Measurement Computing Personal Daq rev.6.0 User Manual
Page 144

B-12 API Commands
Appendix B,
887095
Personal Daq User’s Manual
daqAdcSetMux
DLL Function
daqAdcSetMux(DaqHandleT handle, DWORD startChan, DWORD endChan, daqAdcGain gain,
DWORD flags);
C
daqAdcSetMux(DaqHandleT handle, DWORD startChan, DWORD endChan, DaqAdcGain gain,
DWORD flags);
Visual BASIC
VbdaqAdcSetMux&(ByVal handle&, ByVal startChan&, ByVal endChan&, ByVal gain&, ByVal
flags&)
Delphi
daqAdcSetMux(handle:DaqHandleT; startChan:DWORD; endChan:DWORD; const
gain:daqAdcGain; flags:DWORD)
Handle
Handle to the device for which to configure the ADC channel scan group
StartChan The starting channel of the scan group
EndChan
The ending channel of the scan group
Gain
The gain value for all channels
Parameters
Flags
Channel configuration flags in the form of a bit mask
DerrInvGain
Invalid gain
DerrIncChan
Invalid channel
Returns
DerrNoError
No error
See Also
daqAdcSetScan, daqAdcGetScan
Program References
None
Used With
All devices
Description
daqAdcSetMux
sets a simple scan sequence of local A/D channels from startChan to endChan with the specified gain value. This
command provides a simple alternative to daqAdcSetScan if only consecutive channels need to be acquired. The flags parameter is
used to set channel dependent options. See ADC Flags Definition table for channel flags definitions.
daqAdcSetRate
DLL Function
daqAdcSetRate(DaqHandleT handle, daqAdcRateMode mode, daqAdcAcqState acqState, FLOAT
reqRate, PFLOAT actualRate);
C
daqAdcSetRate(DaqHandleT handle, DaqAdcRateMode mode, DaqAdcAcqState acqState, FLOAT
reqRate, PFLOAT actualRate);
Visual BASIC
VBdaqAdcSetRate(ByVal handle&, ByVal mode&, ByVal acqState&, ByVal reqRate!,
actualRate!);
Delphi
daqAdcSetRate(handle:DaqHandleT; mode:daqAdcRateMode; state:daqAdcAcqState;
reqValue:single; actualValue:PSINGLE);
handle
Handle to the device for which to set ADC scanning frequency.
mode
Specifies the rate mode (frequency or period).
acqState
Specifies the acquisition state to which the rate is to be applied.
reqRate
Specifies the requested rate.
Parameters
actualRate
Returns the actual rate applied. This may be different from the requested rate.
Returns
DerrNoError
No error
See Also
daqAdcSetAcq, daqAdcSetTrig, daqAdcArm, daqAdcSetFreq, daqAdcGetFreq
Program References
DAQEX.PAS (Delphi), ADCEX1.C, FREQEX1.C, PULSEEX1.C, MULTEX1.C, DAQEX.FRM (VB)
Used With
All devices
Description
daqAdcSetRate
configures the scan rate using the rate mode specified by the mode parameter. Currently, the valid modes are:
•
DarmPeriod
- Defines the requested rate to be in periods/sec.
•
DarmFrequency
- Defines the requested rate to be a frequency. This function will set the acquisition rate requested by the
reqRate parameter for the acquisition state specified by the acqState parameter.
Currently, the following acquisition states are valid:
•
DaasPreTrig
- Sets the pre-trigger acquisition rate to the requested rate.
•
DaasPostTrig
- Sets the post-trigger acquisition rate to the requested rate.
Personal Daq does not allow a pre-trigger rate different from the post-trigger rate. Therefore, the pre-trigger rate settings will be ignored
and the post-trigger rate will be used for both the pre-trigger and the post-trigger scan rates.
If the requested rate is unattainable on the specified device, a rate will be automatically adjusted to the device’s closest attainable rate. If
this occurs, the actualRate parameter will return the actual rate for which the device has been programmed.