基于RGMII的DSP话音桥接设计及实现

Design and Implementation of DSP Voice Bridging Based on RGMII

使用现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)分别实现精简吉比特介质独立接口(Reduced Gigabit Media Independent Interface,RGMII)千兆网口、中央处理器(Central Processing Unit,CPU)接口以及数字信号处理(Digital Signal Process,DSP)接口,并且利用同步动态随机存储器(Synchronous Dynamic Random Access Memory,SDRAM)实现高速RGMII数据到低速DSP数据的缓存,采用综合交换模块实现网口、CPU及DSP间的话音和信令交互,最终实现了基于RGMII的DSP话音桥接设计,并通过了ping包测试和实际通话测试。

This system uses Field Programmable Gate Array(FPGA)to realize the Reduced Gigabit Media Independent Interface(RGMII)Gigabit Ethernet port,Central Processing Unit(CPU)interface,and Digital Signal Process(DSP)interface respectively,and uses Synchronous Dynamic Random Access Memory(SDRAM)to realize the cache of high-speed RGMII data to low-speed DSP data,and adopts a comprehensive switching module to realize the voice and signaling interaction between the network port,CPU and DSP.Finally,the voice bridge design of DSP based on rgmii is realized,and the ping packet test and actual call test are passed..