Measurement Computing Personal Daq rev.6.0 - Manual (Page 135)

Personal Daq User’s Manual Appendix B, 887095 API Commands B-3
Commands in Alphabetical Order
The following pages give the details for each API command. Listed in alphabetical order, each section
starts with a table that summarizes the main features of the command (C, Visual BASIC, and Delphi
language prototypes and their related parameters). An explanation follows with related information and in
some cases a programming example.
Note: Commands, parameters, values, and code all use a bold mono-spaced Courier font to
distinguish characters and avoid ambiguity.
daqAdcAcqGetStat
DLL Function daqAdcAcqGetStat(DaqHandleT handle, PDWORD active, PDWORD preTrigCount, PDWORD
postTrigCount, PDWORD totalAvail, PDWORD bufCycles, DWORD bufPosition);
C daqAdcAcqGetStat(DaqHandleT handle, PDWORD active, PDWORD preTrigCount, PDWORD
postTrigCount, PDWORD totalAvail, PDWORD bufCycles, DWORD bufPosition);
Visual BASIC VBdaqAdcAcqGetStat&(ByVal handle&, ByRef active&, ByRef preTrigCount&, ByRef
postTrigCount&, ByRef totalAvail&, ByRef bufCycles&, ByRef bufPosition&)
Delphi daqAdcAcqGetStat(handle:DaqHandleT; var active:DWORD; var preTrigCount:DWORD; var
postTrigCount:DWORD; var totalAvail:DWORD; var bufCycles:DWORD; var
bufPosition:DWORD)
handle Handle of device from which to obtain status.
active Indicates the current state of the acquisition.
preTrigCount Indicates the number of pre-trigger scans acquired.
postTrigCount Indicates the number of post-trigger scans acquired.
totalAvail Indicates the total number of available scans.
bufCycles Indicates the number of buffer cycles processed.
Parameters
BufPosition Indicates the buffer position.
Returns DerrNoError No error
See Also daqAdcTransferGetStat
Program References None
Used With All devices
Description
daqAdcAcqGetStat
allows you to retrieve the current state of the acquisition in terms of the number of pre-trigger and post-trigger scans
acquired, the total amount of acquired scans available for transfer, the number of buffer processing cycles that have occurred, and the
current position in the acquisition buffer.
The active parameter will indicate the current state of the acquisition in the form of a bit mask. Refer to the ADC Acquisition/Transfer Active
Flag Definitions (in the ADC Miscellaneous Definitions table) for valid bit-mask states.
The preTrigCount and postTrigCount parameters return the total number of pre-trigger and post-trigger scans acquired respectively.
The totalAvail and bufCycles parameters indicate the number of available scans and the number of buffer processing cycles that
have occurred. The bufPosition parameter indicates the current position in the transfer buffer.
daqAdcArm
DLL Function daqAdcArm(DaqHandleT handle);
C daqAdcArm(DaqHandleT handle);
Visual BASIC VBdaqAdcArm&(ByVal handle&)
Delphi daqAdcArm(handle:DaqHandleT)
Parameters handle Handle to the device to which configured ADC acquisition is to be armed
Returns DerrNoError No error
See Also daqAdcDisarm
Program References ADCEX1.C, DAQEX.FRM (VB), DAQEX.PAS (Delphi)
Used With All devices
Description
daqAdcArm allows you to arm an ADC acquisition by enabling the currently defined ADC configuration. ADC acquisition will occur when
the trigger event (as specified by daqAdcSetTrig) is satisfied. All ADC acquisition configuration information must be specified prior to the
daqAdcArm
command. For a previously configured acquisition, the daqAdcArm command will use the specified parameters. If no
previous configuration was given, or it is desirable to change any or all acquisition parameters, then those commands relating to the desired
ADC acquisition configuration must be issued prior to calling daqAdcArm. Personal Daq will perform calibration upon execution of the
daqAdcArm
command.