【摘要】 针对FPGA访问USB设备存在传输速率低、资源消耗大、开发复杂的缺点,提出了一种将ARM处理器与FPGA相结合实现高速访问USB设备的方案。该方案利用ARM处理器的USB Host读取USB设备数据并缓存于高速内存,采用乒乓机制通过SRAM接口将数据传给FPGA。经测试,数据传输速率可以达到48Mbps。该方案具有开发难度小,资源占用率低和传输速率高的特点,适合于FPGA高速读取大量外部数据。更多还原

【Abstract】 A design of high-speed USB device accessing combining ARM processor and FPGA is proposed to solve the problems of low transmission rate,a lot of resource consumption and complex development when accessing USB device by FPGA.Data from USB device are read through USB Host of ARM processor and they are saved in high-speed Cache.The data are sent to FPGA by SRAM interface using ping-pong mechanism.Test results demonstrate that the data transmission rate is 48Mbps.The design has simple development,low resource consumption and high transmission rate,which is suitable for accessing mass external data quickly by FPGA.更多还原