基于FPGA的嵌入式系统USB接口设计

Design of USB interface of embedded system based on FPGA

设计基于FPGA的IP-PBX电话应用系统,用于传统的电话网络(PSTN)与PC机之间的接口连接。USB2.0接口器件EZ-USB FX2 CY7C68013A-56工作在slaveFIFO模式,为基于FPGA的嵌入式系统与PC机之间提供数据和命令通道,从而可满足PC机与FPGA之间数据与命令的高速传输,实现PSTN与PC机之间的电话通信。硬件调试结果表明系统工作稳定,通话质量满足要求。

The paper focus on the implementation of the IP-PBX PSTN system based on FPGA,realizes the interface connection between conventional PSTN and PC.The USB2.0 interface chip EZ-USB FX2 CY7C68013A-56 works in slave FIFO mode,it provides high-speed transmission channels for data and commands of the embedded system based on FPGA, realizes the high-speed data transmission between the PC and FPGA system.The hardware testing result proves that the system works stable,and satisfies the audio criterion.