双核嵌入式处理器的低成本USB接口设计  

Design of Low-cost USB Interface on Dual-core Processor

作　　者：叶志龙[1] 张刚[1] 李静[1] 

机构地区：[1]太原理工大学信息工程学院,山西太原030024

出　　处：《太原理工大学学报》2006年第4期446-449,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金(60372058);山西省自然科学基金(20041046)

摘　　要：对照数据手册的时序要求优化硬件逻辑设计,解决了双核嵌入式处理器TMS320VC5471和USB芯片PDIUSBD12时序不兼容的问题。在此基础上完成了USB系统的底层固件编程,顺利实现了双核嵌入式处理器与USB部件的通信。最后详细介绍了USB的工作原理及初始化枚举等的工作过程。由于PDIUSBD12有价格低廉、性能可靠等诸多优点,所以既保证了USB系统的整体性能,又有效地降低了ARM系统的成本。We have optimized the hardware logic according to the timing requirement on datasheet, and solved the timing incompatibility between the dual-core processor TMS320VC5471 and the USB chip PDIUSBD12. Then we finish the firmware programming of the USB system and realize the communication between the dual-core processor and the USB device. Finally the basic theory and enumerating initialization process was introduced. For the lowcost and the high performance of PDIUSBD12, we cuts down the cost of ARM system yet not affect its high performance.

关 键 词：时序 固件编程 USB 双核处理器 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]