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Design & Implementation of USB Device Driver Based On μC/OS-II

Chen Xiao-hua

Abstract

With the promotion of MCU process ability and progress of real time operation system,it usually performs the complicated applications under the multi-tasking architecture by the usb transmission interface.This paper discuss the design implementation of the multi-tasking architure usb device driver based on μC/OS-II to realize usb driver's application in the embedded system and improve the speed of data transmission efficiency.The design scheme is that a task is added up between the interrupt service program and application.The task finishes data distribution, transmission, mutex and guarantee the correctness and real-time performance.Test results show that the USB device driver can meet real-time requirement,enhance the data transmission efficiency and support usb device application in the embedded system.

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Key concepts: USB, Computer science, Semaphore, Interrupt, USB hub, Embedded system, Host controller interface, eXtensible Host Controller Interface (xHCI)