模拟器中基于Slave FIFO模式USB数传系统设计

摘要

在模拟器的设计中，为了使数据能够快速有效地在模拟器的各个模块之间进行高速传递，提出了一种同步Slave FIFO模式高速USB数据传输设计方法，并完成了系统的软硬件设计。系统以FPGA作为核心逻辑控制单元，优化设计有限状态机实现同步Slave FIFO接口协议，设计了芯片固件程序，实现系统在线自动升级加载功能。实际测试表明，本系统数据传输能力平均可达40 MB/s，本系统设计可扩展性好，易于修改和移植，能降低模拟器成本。%In the design of the simulator, in order to have the data conveyed quickly and efficiently among every model of the simulator, this article introduces a kind of high speed USB transport method, and finishes the hardware and software's design. The system uses FPGA as its control center, and designs optimized finite-state machine to realize synchronous slave FIFO protocol, at the same time chip firmware program is designed to ensure that the system software can be update on line without any manual operation. The test results show that the system can run at the average data transfer rate of up to 40MB/s, and this design which has strong expansibility can be changed and easy-to-port. Besides, it can cut down the cost of the simulator.