【摘要】 介绍了基于Intel PXA27X微处理器开发平台上使用WM9712L音频芯片,在Linux操作系统上实现了音频系统的软硬件设计,以及在Linux操作系统上的驱动程序开发。介绍了AC97的协议,音频的接口,较详细地分析音频的驱动部分,通过对寄存器的合理配置和实际中碰到音频的噪声问题的解决,并通过实际硬件平台的测试。测试表明作为商用PDA的音频驱动开发可以满足用户需求,码流比较平稳,并取得良好的音质效果,可作为实际应用中的一种参考方案。更多还原

【Abstract】 Introduces the software and hardware implementation of audio system using WM9712L based on Intel PXA27X processor,and its device driver for Linux operating system is designed.The protocol about AC97 audio is introduced.Then describes audio’s hardware interface.After that detailly discuss the audio’s driver,thought configuring register and resovling the noise problems in reality.Have tested the audio.Results show the audio ’s driver of commercial PDA can satisfy the user’s need,which is steady bitrate and good sound quality.It can be a reference scheme in application.更多还原