User`s guide

DC 900-1343D 25
Chapter
2
DDCMP DLI Functions
Note
In this document, the term “Freeway” can mean either a Freeway
server or an embedded ICP. For the embedded ICP, also refer to
the user’s guide for your ICP and operating system (for example,
the ICP2432 User’s Guide for Windows NT).
This chapter describes how to use the data link interface (DLI) functions to write client
applications interfacing to the Freeway DDCMP protocol software. You should be
familiar with the concepts described in the Freeway Data Link Interface Reference Guide ;
however, some summary information is provided in Section 2.1.
If you are using an embedded ICP, you must also refer to the user’s guide for your spe-
cific ICP and operating system regarding the embedded DLI interface (referred to as
DLITE).
The following might be helpful references while reading this chapter:
• Section 2.3 compares a typical sequence of DLI function calls using blocking ver-
sus non-blocking I/O.
• Appendix A explains error handling and provides a summary table for DDCMP
error codes. The Freeway Data Link Interface Reference Guide gives complete DLI
error code descriptions.