本文提出了一種基于USB 接口的FPGA SelectMap 配置方式的實現方案。方案以大容
量Spartan3 FPGA 作為配置目標，選用Cypress EZ-USB FX2LP 作為USB 設備芯片，采用其內置的端點FIFO 和GPIF 狀態機實現了一個高性能的配置數據傳輸通道，并設計了USB 廠商請求來控制配置進程。方案具有配置靈活、成本低、速度快、實現簡單的特點，目前已在很多軟件無線電項目中得到應用，具有很強的實用性。
關鍵字：FPGA；配置；EZ-USB；Spartan3；SelectMap
A Method of Implementation FPGA SelectMap Configuration on USB Interface
Liu Sen, Zhao Ming-sheng (The Department of Electronic Engineering, Tsinghua University, Beijing 100084) Abstract: A method of implementation FPGA SelectMap mode configuration on USB interface is introduced. It utilize Cypress EZ-USB FX2 LP as the USB device controller chip, and use the endpoint FIFO and GPIF state machine embedded in the EZ-USB to implement a high performance configuration data channel. Further more, several USB vendor requests are designed to control the process of configuration. This configuration method has the benefit of low cost and complexity, high speed and flexibility, and has been selected in several software-defined radio projects, so it is very practical.
Key words: FPGA; Configuration; EZ-USB; Spantan3; SelectMap