Usb Without Invasive Data Collection Technology Research

With the continuous development of USB technology, we have a higher requirement of the stability and data analysis of the transer process,we will quickly identify problems acording to the data that we have recorded and displayed quickly, comprehensively and accurately from the USB data bus,thus contributing to the study of USB as well as to the acceleration of the speed of USB product development.According to the actual demands,we have a study on non-invasive real-time data monitoring based on USB.This article describes the main constitution of the system,the FPGA control core,the use of non-invasive way to listen and record the data and sent through the USB interface to a PC, or stored in the Flash chip to prepare for post-mortem analysis.This article also completes the extraction of clock module design based on FPGA,give a timing simulation waveform of the core module.This article provides a new method to get data from a USB communication bus and USB non-invasive real-time data monitoring.