Measurement Computing TempBook rev.3.0 - Manual (Page 137)

TempBook User’s Manual daqCommand Reference (Enhanced API) 11-13
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)
Parameters
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
flags Channel configuration flags in the form of a bit mask
Returns DerrInvGain - Invalid gain
DerrIncChan - Invalid channel
DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqAdcSetScan, daqAdcGetScan
Program References DACEX1.C, DAQEX.FRM (VB)
Used With All devices
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, acqState:
DaqAdcAcqState; reqRate:FLOAT; actualRate:PFLOAT);
Parameters
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.
actualRate Returns the actual rate applied. This may be different from the requested rate.
Returns DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqAdcSetAcq, daqAdcSetTrig, daqAdcArm, daqAdcSetFreq, daqAdcGetFreq
Program References
Used With
All devices
daqAdcSetRate configures the ADC 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 ADC 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 ADC acquisition rate to the requested rate.
•
DaasPostTrig - Sets the post-trigger ADC acquisition rate to the requested rate.
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.