Measurement Computing TempBook rev.3.0 - Manual (Page 138)

11-14 daqCommand Reference (Enhanced API) TempBook User’s Manual
daqAdcSetScan
DLL Function daqAdcSetScan(DaqHandleT handle, PDWORD channels, DaqAdcGain *gains, PDWORD
flags, DWORD chanCount);
C daqAdcSetScan(DaqHandleT handle, PDWORD channels, DaqAdcGain *gains, PDWORD
flags, DWORD chanCount);
Visual BASIC VBdaqAdcSetScan&(ByVal handle&, channels&(), gains&(), flags&(), ByVal
chanCount&)
Delphi daqAdcSetScan(handle:DaqHandleT; channels:PDWORD; gains:DaqAdcGainP;
flags:PDWORD; chanCount:DWORD)
Parameters
handle Handle to the device for which ADC scan group is to be configured
channels An array of up to 512 channel numbers
*gains An array of up to 512 gain values
flags Channel configuration flags in the form of a bit mask
chanCount The number of values in the chans and gains arrays
Valid values:
1 -512
Returns DerrNotCapable - No high speed digital
DerrInvGain - Invalid gain
DerrInvChan - Invalid channel
DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqAdcGetScan, daqAdcSetMux
Program References ADCEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ADCEX.PAS (Delphi)
Used With All devices
DaqAdcSetScan configures an A/D scan group consisting of multiple channels. As many as 512
channel entries can be made in the A/D scan group configuration. Any analog input channel can be
included in the scan group configuration at any valid gain setting. Scan group configuration may be
composed of local or expansion channels and (for the DaqBook/DaqBoard) the high-speed digital
I/O port.
The channels parameter is a pointer to an array of up to 512 channel values. Each entry
represents a channel number in the scan group configuration. Channels can be entered multiple
times at the same or different gain setting.
The gains parameter is a pointer to an array of up to 512 gain settings. Each gain entry represents
the gain to be used with the corresponding channel entry. Gain entry can be any valid gain setting
for the corresponding channel.
The flags parameter is a pointer to an array of up to 512 channel flag settings. Each flag entry
represents a 4-byte-wide bit map of channel configuration settings for the corresponding channel
entry. The channel flags can be used to set channel specific configuration settings (such as polarity).
See the ADC Flags Definition table for valid channel flag values.
The chanCount parameter represents the total number of channels in the scan group configuration.
This number also represents the number of entries in each of the channels, gains and flags
arrays.