基于EDMA控制器的多通道音频数据传输  

Multi-channel Audio Data Transmission Based on EDMA Controller

作　　者：刘力[1] 张鹏[1] 杨军[1] 

机构地区：[1]中国科学院声学研究所通信声学实验室,北京100190

出　　处：《电声技术》2014年第8期59-61,68,共4页Audio Engineering

摘　　要：在以TMS320C6747数字信号处理器为核心的硬件平台上实现了一种多通道音频数据传输的方案。简述了系统的硬件结构,详细说明了使用多通道音频串行接口McASP和增强型直接内存访问EDMA实现多通道音频数据传输的配置方法。在未使用BIOS驱动的情况下,通过C语言在硬件底层实现了基于EDMA功能的音频数据后台传输,使CPU无需进行数据的读写操作而仅进行算法处理,提升了系统的整体运行效率。A multi-channel audio data transmission program is developed on the hardware platform which uses TMS320C6747 digital signal processor as the core. Hardware architecture is simply described in this paper. Implementation con- figuration details of multi-channel audio data transmission using multi-channel audio serial port （McASP） and the enhanced direct memory access （EDMA） controller are also illustrated. Without using DSP/BIOS drivers, low-level background audio data trans- mission is achieved based on the EDMA function using the C programming language. CPU carries out only data computing without IO operations. In this way, overall calculation efficiency of the proposed system is also promoted.

关 键 词：数字信号处理器 EDMA控制器 McASP接口 多通道音频传输 

分 类 号：TN912[电子电信—通信与信息系统]