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Chapter 2 Function Reference — DIG_Block_Check
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National Instruments Corporation 2-147 NI-DAQ FRM for PC Compatibles
DIG_Block_Check
Format
status = DIG_Block_Check (deviceNumber, group, remaining)
Purpose
Returns the number of items remaining to be transferred after a DIG_Block_In or
DIG_Block_Out call.
Parameters
Input
Output
Parameter Discussion
group is the group involved in the asynchronous transfer.
Range: 1 or 2 for most devices.
1 through 8 for the DIO-96.
remaining is the number of items yet to be transferred. The actual number of bytes remaining
to be transferred is equal to remaining multiplied by the value of groupSize specified in the
call to
DIG_Grp_Config or DIG_SCAN_Setup.
Note
C Programmers:—remaining is a pass-by-reference parameter.
Using This Function
DIG_Block_Check monitors an asynchronous transfer of data started via a DIG_Block_In
or
DIG_Block_Out call. If NI-DAQ has completed the transfer, DIG_Block_Check
automatically calls
DIG_Block_Clear, which permits NI-DAQ to make a new block transfer
call immediately.
Name Type Description
deviceNumber i16 assigned by configuration utility
group i16 group
Name Type Description
remaining u32 number of items yet to be transferred