Technology Of The USB Protocol And Drive Based On FPGA

With the rapid changes in science and technology, electronic technology has also been progress and development. People on the volume of electronic products, speed and security put forward higher requirements. Embedded chips, parallel processing and system clustering technologies such as requirements put forward to solve this technical basis. FPGA is a chip embedded technology embedded technology in the mainstream, we can understand the function of the software to be solidified in the product is a product of the computing processors and interfaces into a chip. Compared to software products that are cured in the running speed is greatly increased, the volume even a small, almost negligible power consumption and reliability are a big advantage.Mobile devices and the explosive growth of the embedded market, and promote public standard interface through different devices to facilitate data sharing between the growth in demand. Universal Serial Interface (USB), widely used, secure its position as an industry standard interface has become the embedded system I/O connection of the de facto standard. USB's success and popularity, thanks to its ease of use with hot swap and plug and play performance. USB from the initial introduction to the PC, to the now rapidly expanding into all aspects of non-PC applications, including mobile embedded systems. To implement USB in embedded applications is not that simple. Compared with PC systems, face many challenges and limitations. If the USB implementation of planning well, will simplify and speed up the USB-to-end integration products work. This is where the end product of USB based applications for the system level decision-making, product characteristics and performance requirements of balance and different, will affect the proper implementation of USB functionality.This article is based on USB2.0 interface protocol specification, combined with practical application, presents a FPGA-based USB interface protocol implementations, and to be achieved Verilog HDL language. Then, the interface software simulation and hardware testing. Finally, the cure can be re-used IP cores are widely used in the actual work.