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介绍了一种基于SOPC技术的嵌入式数字音频录放系统的设计方案。该系统通过在FPGA芯片上配置NiosII软核CPU和相关的接口模块来实现嵌入式系统的主要硬件结构,并结合系统的软件设计来控制音频编/解码芯片和SDRAM,实现了音频信号的A/D、D/A转换、存储、回放等功能。由于采用了SOPC和DMA控制技术,该系统具有设计灵活、扩展性好和数据处理速度快等优点。
A design scheme of embedded digital audio recording and reproducing system based on SOPC technology is introduced. This system realizes the main hardware structure of embedded system by configuring NiosII soft core CPU and related interface module in FPGA chip, and combines the software design of the system to control the audio coding / decoding chip and SDRAM to realize the audio signal A / D, D / A conversion, storage, playback and other functions. Due to the SOPC and DMA control technology, the system has the advantages of flexible design, good scalability and data processing speed.