Circuit structure and method for realizing USB interface functional verification test on the basis of FPGA module

Abstract

The invention relates to a circuit structure for realizing a universal serial bus (USB) interface functional verification test on the basis of a field programmable gate array (FPGA) module. The circuit module comprises an FPGA module and an advanced reduced instruction set computer (RISC) machine (ARM) chip, wherein a USB host control program is loaded in the FPGA module; the FPGA module is connected with USB equipment to be tested through a low voltage differential signaling (LVDS) signal interface and is also connected with the ARM chip; and the ARM chip is connected with a test computer. The invention also relates to a method for performing the USB interface functional verification test by using the circuit structure. By adopting the circuit structure and the method for realizing the USB interface functional verification test on the basis of the FPGA module, the test computer is communicated with the USB equipment to finish the processes of identification and enumeration with the USB equipment, and the ARM chip resolves a command sent by the test computer and controls a command which is sent to the test computer by the USB equipment, so that not only a USB interface can be verified more comprehensively, conveniently and effectively, but also the structure is simple and practical, the operation process is quick and convenient, the working performance is stable and reliable, and the application range is wide.

Description

technical field [0001] The invention relates to the field of USB interfaces of electronic equipment, in particular to the technical field of USB interfaces of functional chips of electronic equipment, and specifically refers to a circuit structure and a method for implementing a USB interface function verification test based on an FPGA module. Background technique [0002] USB is the abbreviation of Universal Serial Bus in English, and the Chinese meaning is "Universal Serial Bus". USB was jointly proposed by Intel, Compaq, IBM, Microsoft and other companies at the end of 1994. After years of development, the version has developed into version 2.0, which has become the standard expansion interface in computers. At present, the motherboard mainly adopts USB1.1 and USB2.0 (this article is mainly for USB1.1). Moreover, the USB interface can also realize dual-machine interconnection through a special USB connection line, and more interfaces can be expanded through the Hub. US...

AI Technical Summary

Problems solved by technology

[0017] All hubs and high-speed functional device upstream ports (towards the host) must use high-speed drivers. Upstream hub ports can transmit data at both high and low speeds, but always use high and edge rates when signaling

Images