基于SPI总线的DSP与音频编解码芯片的接口设计

摘要

In audio signal processing system,interface design is critical to the implementation of the communication because the data format and speed don't match between the DSP and CODEC.To solve this problem,this paper presents an interface design method based on SPI bus,and gives the main part of the interface.This method has implemented in FPGA,and applied to the audio processing system based on the SuperⅤ DSP processor.%语音信号处理系统中,DSP与音频编解码芯片存在数据格式与速度不匹配的问题,使接口成为设计的关键.针对该问题提出了一种基于SPI总线的DSP与音频编解码芯片的接口设计方法,介绍了接口的关键组成部分.此方法在FPGA上进行了实现,已应用于SuperⅤ DSP处理器的音频处理系统中.