一种基于PCI9054与FPGA的PCI数字音频输出方法  

The Design of PCI Digital Sound Output Module Based on the PCI9054 and FPGA

作　　者：荣林[1] 曲伟[1] 

机构地区：[1]中国船舶重工集团公司江苏自动化研究所,江苏连云港222006

出　　处：《仪表技术》2011年第2期13-15,共3页Instrumentation Technology

摘　　要：为满足声纳电子装备音频输出需求,提出了一种基于PCI9054与FPGA的PCI音频输出技术解决方法。采用PLX公司的PCI9054芯片,实现音频数据的PCI传输。利用FPGA内部嵌入的存储块,设计了大容量双端口FIFO,解决了音频数据输入与输出速率不一致问题。进行逻辑设计,通过PCI接口,把语音数据存在FPGA实现的FIFO中;同时,FPGA按照一定时序,读出FIFO中的数据,生成AD1866编程控制信号,进行D/A转换,实现了语音的连续输出,声音清晰,满足了数字音频输出需求。In order to output sound signal for sonar electrical equipment,the technical solution based on the PCI9054 and FPGA is proposed.By the PCI9054 from PLX Company,the PCI transmission for the sound data is done.Using internal memory block in the FPGA,the large size DC FIFO is designed,the rate difference between the input and output of the sound signal is solved.By the logic deign,the sound data is put into the FIFO through PCI interface.At the same time,FPGA reads the sound data from the FIFO according to the timing requirement,and generates the programming signals for the AD1866.Then,D/A conversion is accomplished.At last,the continuous sound output is realized.The sound is clear,and the digital sound output requirement is met.

关 键 词：AD1866 双端口FIFO PCI总线 FPGA 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]