Enxor Open-source Logic Analyzer

Professional grade logic analyzers can cost a fortune, putting these devices out of reach from students and electronic hobbyists

• Enxor is an open-source FPGA project allowing anyone to use or customize it
• Enxor can be used to monitor external signals or added as a submodule in a larger FPGA allowing internal signal testing
• No device specific modules allowing Enxor torun on any FPGA
• User interface works onWindows and Linux

System

Methods

• Input data is analyzed for changes, on a change the data is saved to internal memory with a relative timestamp
• Internal memory stores a chunk of data before a trigger condition another chunk after
• Timing diagrams and documentation is included in the repository to allow othersto understand and contribute
• Data is sent to the computer tobe viewed or saved for later

Conclusion

• Both the number of input channels and the size of the internal memory could be configured by simply changing the parameter
• Anyone can contribute to the project on GitHub allowing it to expand functionality
• Data can be analyzed and saved to the memory in one clock cycle of the FPGA’s system clock.
• Improvements: soft-core processor, external SRAM support, better zoom and pan features, continuous capture, and data compression