Four Point OH Consulting Experience


Four Point OH Consulting has taken a principal role in projects like the following:

Development of a client server control architecture for a large industrial product.  This development allowed the industrial product to be controlled over a TCP/IP network, which led to the removal of both the local operator panel and the floppy drive on this product, resulting in a substantial cost savings.  Designed and wrote both the embedded system server and the Solaris client.  Wrote the network device driver for the embedded system, and debugged the integration of the TCP/IP stack in the embedded environment.  The final client server architecture allowed for file transfer, code upgrades, automated diagnostic inquiries, and human interface command and display functions.  Also set the foundations for a GUI to be implemented above the basic command line architecture.

Migration of processor peripherals to an FPGA implementation.  This involved developing custom IP for interrupt controllers, counter timers, UARTs, analog to digital convertors, and analog to digital convertors.  

The maintenance facility processor for a large industrial product.  This processor provided remote communication and maintenance, human interface, network connectivity, redundancy management and system wide diagnostics.

A complete and adaptable telemetry and command distribution architecture for small to medium sized spacecraft, suitable for both DoD and NASA applications.  This is the subsystem which allows ground stations to communicate with a spacecraft, collects and records data regarding spacecraft health and status, and stores and executes commands for spacecraft control.  This is also the key subsystem for redundancy management.

A flexible and powerful Attitude Determination And Control Systems processor   This is the subsystem which points a spacecraft within the celestial sphere.

A local area network connecting various subsystems on board a medium sized spacecraft.  Responsible for both hardware and software design, as well as budget and schedule planning and adherence.

The development of an HPIB interface for the HP series 9000 Model 712 workstation.  This allowed clients to connect the HPIB industrial control bus interface to this model of HP workstation, which was a feature HP did not offer in this model.  This provided clients with a substantial workstation cost savings.  Developed the hardware, programmable logic, and Unix (HPUX) kernel drivers for this product.

The development of an HPIB to PCI interface bridge.  Developed the hardware and programmable logic for this device.

The development of an embedded processor based telephone line router which routed outgoing calls from a customer location over cost optimized telephone trunk line services.  Design included voice band analog circuitry, microprocessor core and support circuitry, and line routing switching logic.  Developed entire system concept, completed electronic design, and oversaw software development.

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