User manual

Chapter 3 Software Overview
NI-DAQ User Manual for PC Compatibles 3-64 ni.com
Figure 3-20. Basic Port Input or Output Application with Handshaking
Figure 3-21. Basic Port Input or Output Application without Handshaking
Configure ports for input or
output. Enable optional handshaking?
Check for port ready if
handshaking is enabled.
DIG_Prt_Config
DIG_Prt_Status
DIG_Out_PrtDIG_In_Prt
Done?
No
Yes
Ready
Not Ready
Output data to port.Input data from port.
Done?
DIG_Out_Prt
DIG_Prt_Config
Output data to port.Input data from port.
DIG_In_Prt
Yes
No