User manual

Chapter 3 Software Overview
NI-DAQ User Manual for PC Compatibles 3-72 ni.com
Figure 3-25. Double-Buffered Block Operation
DIG_Grp_Config
DIG_Block_In
DIG_Block_Out
Any more data to output?
(Output operations only).
No
Ye s
Clear block operation if
DIG_Block_Check did not.
DIG_Block_Clear
DIG_Block_Check
No
Configure groups for input or output.
Enable double buffering.
Start block input. Start block output.
DIG_DB_HalfReady
DIG_DB_Transfer
Transfer?
Ye s
No
Ye s
Is NI-DAQ ready to transfer
the next half of the data?
Transfer next half of the data to or
from the digital data buffer.
Do you wish to transfer more
data to or from the digital buffer?
DIG_DB_Config