高速D/A卡在声信号模拟器中的应用-《计算机技术与发展》

文章信息/Info

Title:: Application of High-Speed D/A Converter in Acoustic Signal Simulator

Author(s):: ZHANG Lei; 715th Research Institute of China Shipbuilding Industry Corporation

摘要:: 介绍了PMC66-16AO16高速D/A卡在声信号模拟器中的应用,基于该器件的声信号模拟器由主控模块和接口模块组成,主控模块负责控制系统工作状态和执行声信号模拟算法;接口模块负责将生成的数据信号连续地发送到D/A卡上。为达到实时性和灵活性的目标,本系统采用了双缓冲区机制,即收缓冲区接收新的数据、发缓冲区把当前的数据发送出去;并且由D/A卡产生的中断信号触发双缓冲区的交换,从而使信号生成过程和传输过程同步进行,保证输出的声信号连续无断点。最后通过实验结果验证了设计目标

Abstract:: Describe the application of PMC66-16AO16 high speed D/A converter in acoustic signal simulator.The acoustic signal simulator based on the converter is consisted of the main module and the interface module.The main module controls the working status of the simulator and the process of the generation algorithm of the acoustic signal.The interface module sends the signal to the converter simultaneously.To implement the real time performance and flexibility,the system deploys the double buffering,which sends the signal by the output buffer and receives the signal by the input buffer.The buffers are swapped when the interrupt occurs from the converter.Therefore,the signal generation and the data transmit are processed concurrently and the output signal is continuous.The process and results of experiments are also given