简要论述了用于兰州重离子加速器冷却储存环(HIRFL-CSR)控制系统的前端总线控制器。该控制器是基于ARM920T核心的AT91RM9200处理器,运行嵌入式Linux操作系统。描述了AT91RM9200处理器与Security Digital Memory Card(SD卡)的硬件接口电路,分析了操作系统内核和Linux驱动程序结构,设计和实现了嵌入式Linux下基于AT91RM9200处理器的SD卡驱动程序。关键词:AT91RM9200;嵌入式Linux;SD卡;驱动程序Abstract:The HIRFL-CSR EVME bus controller, which runs Embedded Linux OS, is basedon AT91RM9200 microprocessor, whose core is ARM920T. There are hardware interfaceelectronic circuits connecting AT91RM9200 microprocessor and Security DigitalMemory Card (SD Card). This article analyzes Operation System kernel and Linuxdevice driver’s structure, designs SD Card driver based on Embedded Linux, whichruns on AT91RM9200 microprocessor.Key words:AT91RM9200; Embedded Linux; SD Card; device driver
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