摘要
基于Wi-Fi SoC的音频驱动开发是Wi-Fi音频应用的系统设计难点之一,论文针对AR9331无线SoC平台,提出了一种基于ASoC架构的嵌入式Linux音频驱动程序,设计了一种链式DMA传输机制,提高了系统实时性并降低了CPU资源占用率,通过动态音频电源管理策略,降低了音频系统的功耗开销。该驱动已被整合到"48KHz/24-bit/双声道"高保真无线音频系统中,实际结果表明该驱动架构具有良好的抽象层级和可移植性,可适用于基于高通多款主流WiFi SoC的无线音频系统上,具备非常好的实用参考价值。
The development of audio driver based on Wi-Fi System on Chip （SoC） is one of the system design di fficulties of Wi-Fi audio application This paper presents an embedded Linux audio driver based on ALSA System on Chip （ASoC） architecture,aimed at AR9331 wireless SoC platform. A kind of Direct Memory Access （DMA） chaining transfer mechanism was designed. The real time performance of the system was enhanced and central processing unit （CPU） resource usage was reduced. Power consumption was also reduced via dynamic audio power management （DAPM）. The driver was applied in the “48KHz/24-bit/Stereo” high-fidelity wireless audio system. Tests showed that the driver architecture had good abstractness and portability. It can be quickly transplanted to wireless audio systems based on several Wi-Fi SoC of Qualcomm and is of good reference value.
出处
《计算机与数字工程》
2016年第10期2072-2077,共6页
Computer & Digital Engineering
基金
国家发改委2013年移动互联网及第四代移动通信(TD-LTE)产业化专项:高速宽带无线接入技术研发及创新应用示范资助
