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3-2
Software Architecture
Figure 3-16. shows the major software components that control the system. The software that
runs on the Controller Board is EPROM based. The software that runs on the single board
computer is stored on the HDD and loaded during power up. Like all PC compatible
computers, the SBC runs a brief self-test on power up and then loads the operating system
followed by the system’s application components.
Figure 3-16: Software Architecture Diagram
Operating System
The system’s software currently runs on RedHat Linux. The OS is multi tasking allowing the
software components to run fairly independently. The OS also provides support for the
TCP/IP network interface and the HDD.
Display Driver
This software interacts with the operator display panel on the front of the system. This
software processes all button pushes. The driver also formats the information going to the
four line display and the context sensitive button labels.
Comm Server
The comm server software on the system is the other half of the download software that is
part of the Catalyst workstation software. Parts to be built (.cmb files) are received by the
comm server and saved on the data partition of the HDD. Queue management of the parts to
be built is also part of the comm server. Lastly the comm server provides Catalyst the system
status information that is displayed on workstation.