Design And Implementation Of FPGA-based Portable Logic Analyzer

Logic analyzer is widely used digital test equipment. It applies to computer software and other digital systems, hardware debugging, troubleshooting, performance analysis process. It can monitor the hardware circuit when the logic level, and stores, with an intuitive graphical way to express it, to facilitate detection, analysis of the circuit design error. In the digital circuit debugging, often multiple waveforms to test and analyze the logic. Ordinary oscilloscope can only test two-way signal waveform. Digital circuits in many studies and experiments, often need to simultaneously view multiple digital signals, timing relationships, and sometimes the signal is not periodic, only the observation of the oscilloscope can not be the complete understanding of the relationship between the signal and therefore need to use logical analysis Miriam. Logic analyzer data field is the most effective test instruments, the most representative instruments.However, since1973the birth of the first logic analyzer so far, the logic analyzer rate is still low, more than30%of the number of designers are not using logic analyzer, because of its high price.This design is in view of the current card virtual logic analyzer significant shortcomings, using real-time, reconfigurable and good reliability of FPGA technology is designed and implemented a portable logic analyzer. This logical analyzer supports three kinds of modes,10kinds of different sampling frequency. With six sampling channel to show results, and each channel can support rising and falling edge of the two kinds of trigger modes. After completing the entire system, black-box testing method was adopted to test the various functions of the system in detail. The results show that this logical analyzer is fully achieved the desired objectives.