The QoS Support of Embedded USB Protocol Stack on the Real-time Kernel MicroC/OS-II

• Main Authors: Wei-Jie Hung, 洪偉傑
• Other Authors: Chung-Ping Young
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/77802112883034457974

碩士 === 國立成功大學 === 資訊工程學系碩博士班 === 94 === USB interface have been the main peripheral device of PC, and all kinds embedded systems of consumption electron. There are many kinds of operating system such as Windows, Linux, and etc which has been support the USB protocol stack. In this paper we mainly discuss how to implement this protocol stack with QoS support. Because MicroC/OS-II is a real-time kernel system that has many advantages, and has more rigorous transmission requirement of transferring real-time data, choose MicroC/OS-II system to be the real-time kernel of USB protocol stack. But in order to reach the normal operation of entire stack, we also implement many others mechanism includes soft-timer facility, dynamic memory management, device and driver model, and event signal management mechanism, and in order to support QoS requirement, we implement a real-time scheduler to improve the bandwidth management that is original proposed on the USB specification to let the entire USB bus bandwidth more efficiently utilize and manage.