Development Of USB Bus Of Embedded System Based On ARM9 Processor

Embedded system is a fast developing field.The research contents of embedded system deal with various aspect of computer subject.Recently,net system,wireless net,3G application and consumer electronic are applied by embedded system.Primary techniques include embedded operating system,system chip design,application software development and various service investigate.In this paper,the system structure and development of embedded system have been researched.The operation model,the setting and distributing of register in ARM processor have been studied,embedded system microprocessor EP9315 has been analyzed and discussed.Test under ARM Developer Suit1.2 has been done.The embedded operating system VxWorks,PlamOS,Linux are studied.The emphases of the study put on embedded Linux operation system which is applied by this subject.The research on microprocessor EP9315 includes realization of EMS memory,process scheduling,interrupt disposal and system call mechanism.The Bus structure and communication model of USB are discussed.On the basis of research on Cirrus EP9315 chip,transplanting ARM Linux in development board which made by our lab has been done,which include Linux kernel transplanting, USB driver program is realized in Linux with USB Controller of EP9315.