A Software Interface for the ARL Wind Tunnel Data Acquisition System
Abstract
A software interface for the data acquisition system has been developed on a MicroVAX II computer for the Transonic and Low Speed wind tunnels at ARL. The software is responsible for handling instrumentation control and data transfer requests between the data acquisition software and the parallel data bus via a DRV11 parallel I/O interface adapter. Access to the DRV11 registers is effected by direct mapping of the Q22-Bus I/O page to program variables, giving fast and efficient transfer of data to and from the parallel data bus. Up to five processes may access the parallel data bus at one time via this software interface thus allowing great flexibility in the development of data acquisition software. This report details the necessary programming steps which must be included in data acquisition software to access the parallel data bus via the software interface.... Transonic wind tunnels, Software tool support interfaces, Low speed wind tunnels, Computer programs, Aeronautical Research Laboratory, Data acquisition
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA267114
Entities
People
- B. D. Fairlie
- S. S. Sam