通过研究和设计嵌入式USB 的host(主机),阐述了其工作机制和实现架构,并给出了在软硬件平台上的具体实现。首先,在三星的ARM7 处理器S3C44B0X 上移植了实时操作系统(RTOS)——μC/OS-II,然后结合具体的医疗设备的实际需要,利用SL811HS 芯片实现了USB 主机功能,并在此基础上开发了USB接口的EPSON 打印机、海量存储类设备(U 盘,移动硬盘)的嵌入式驱动程序。
关键词:通用串行总线(USB);SL811HS;μC/OS-II ;海量存储;打印语言
Abstract:In this paper, the principle of Embedded USB(Universal Serial Bus) host is deeply researched, and the mechanism and architecture of USB host are expounded, and the practical example based on the Software-Hardware platform is given. First, we transplant μC/ OS-II on the ARM processor S3C44B0X,then, combining the research of the medicine device , the communication of USB host is realized though SL811HS, at last, the drivers of mass storage device and EPSON printer based on USB are developed.
Key words: Universal Serial Bus(USB);SL811HS,μC/OS-II; mass storage;printer language
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