The Tool Desk
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What was UnifiedLogic?
In a November 14, 2007 article for EDN, Clive (Max) Maxfield presented UnifiedLogic as an embedded-development system from Eridon. It aimed to bring hardware and software setup together: instead of waiting for a custom prototype, drivers and an RTOS to be assembled before application work could begin, developers would use a configurable FPGA platform and peripheral modules to create a working prototype.
The system was described as placing the CPU and digital peripheral logic inside a low-cost FPGA, with memory and analog physical-layer components alongside it. The article lists potential subsystems such as USB, Ethernet, CAN, DVI, NTSC/PAL video, LCD, RS-232, A/D and D/A conversion, SPI and I²C.
How the uCard-to-platform workflow worked
- Connect the modules. Eridon uCards represented peripheral or subsystem functions. Each card had a hard-coded type ID, and the IDs were communicated through a serial shift-register chain.
- Read the system configuration. The IDE read the IDs and used them to derive a specification of the assembled system.
- Configure the FPGA. Based on that specification, the IDE was said to configure the FPGA to implement the CPU and required digital subsystems, then connect those functions to appropriate FPGA pins.
- Prepare the software platform. The IDE configured the RTOS and selected subsystem drivers for the specified hardware, integrating them with the prototype.
- Develop the application. With the hardware platform, drivers and RTOS in place, software engineers could begin application work while hardware engineers continued toward a production design.
Maxfield said the uCards routed circuitry toward the FPGA rather than relying on a conventional shared bus, with modules forwarding signals that were not used. He characterized this as avoiding “an inefficient bus architecture”; that is his 2007 description, not a current independent engineering assessment.
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What the IDE, RTOS and drivers provided
The IDE was described as including an editor, compiler, linker and debugger. It generated an application platform and selected RTOS services and drivers to match the system configuration. The RTOS was presented as supporting C and C++ applications and common facilities including threads, timers, semaphores, events, message queues, scheduling and file-system management.
The article specifically mentions FAT32 support for USB and wear-balancing and recovery features for on-board flash. Drivers were framed as higher-level and task-oriented, with APIs and documentation; examples included USB file transfers and video functions such as image blending and text overlay.
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Maxfield also said the kernel and drivers were available as source code under royalty-free terms at the time. Those are historical licensing claims and should not be taken as current terms.
Could developers use other boards or build custom hardware?
The article said UnifiedLogic could also work with third-party development boards or custom boards: users could enter the system specification in the IDE rather than relying on Eridon’s own board-and-uCard setup. It also described module documentation, schematics and reference designs as resources for developing custom hardware and moving toward a production board. The article does not establish present-day compatibility with any board, FPGA family or toolchain.
Rank #3
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What benefits did Eridon claim—and what was not measured?
The proposed benefit was parallel progress: software engineers could start application development on a configured platform while hardware engineers worked toward the production design. The article also describes an online calculator that estimated a lowest-cost FPGA and per-unit production cost from a proposed configuration.
These were claims about the system’s intended workflow and tools. The article reports no named study, benchmark, measured time saved, independently verified cost reduction or actual per-unit cost. It therefore supports explaining how UnifiedLogic was meant to work, but not assigning a numeric productivity or savings benefit to it.
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Is UnifiedLogic available or supported today?
The 2007 EDN article does not establish whether UnifiedLogic, Eridon, its boards or uCards, the IDE, or the RTOS remain available or maintained. It also cannot confirm current hardware compatibility or licensing. Treat the product description and terms as historical unless current documentation from the vendor can be verified.
For someone exploring FPGA-based embedded prototyping today, the relevant category is a current FPGA development board; the article is not evidence for a specific present-day product or UnifiedLogic-compatible board. Compare options by supported FPGA family and toolchain, I/O and peripheral support, RTOS and driver availability, documentation and reference designs, migration from development board to production hardware, and vendor maintenance.
Quick Recap
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