嵌入式系统中基于AC’97标准的音频驱动的设计与实现

Design and Implementation of Audio Driver Based on Audio Codec’97 for Embedded System

介绍了由INTELXscale处理器和UCB1400编解码芯片构成的音频系统体系结构及工作原理,接着描述了嵌入式WinCE操作系统下基于AC’97协议标准的音频设备驱动程序的设计与实现。其中着重讲述了采用DMA描述器传输模式的音频驱动程序的设计与实现。针对音频系统使用效果、功耗控制等方面,作了一些改进。此设计方案已在嵌入式系统中得到使用,运行效果良好。

This paper describes an architecture of the system which consists of the eodee-UCB1400 and the INTEL Xscale PXA255, and design of audio device driver based on Audio Codec＇ 97 for Windows CK The paper focuses on the implementation of the DMA for improving the performance of this audio system to satisfy the real-time requirement of audio system. Some software improvements have been done to reduce the power consumption.