| 列车固体录音装置的音频系统设计与实现 |
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| 引用本文： | 张俊涛,杨超.列车固体录音装置的音频系统设计与实现[J].计算机测量与控制,2011,19(4). |
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| 作者姓名： | 张俊涛 杨超 |
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| 作者单位： | 陕西科技大学电气与信息工程学院,陕西,西安,710021 |
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| 摘 要： | 针对列车固体录音装置对无线电台通话录音的要求,介绍了由AT91SAM9261微处理器与UDA1341TS音频处理芯片组成的基于嵌入式Linux的音频系统的构建;提出了音频系统的软硬件设计方案,利用微处理器的同步串行控制器(SSC)和通用I/O口实现了音频数据及控制信号的传输;在驱动程序设计中采用DMA传输方式,并且使用缓存分段技术对DMA缓存区的管理方式进行了改进,使得对音频数据的处理速度有了较大提高,保证了系统的实时性要求;该系统已经成功地对列车无线列调电台之间的通话进行了录音测试,达到了较好的录放音效果.
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| 关 键 词： | DMA缓存区 音频设备驱动 |
Design and Implementation of Audio System in Train Solid Recording Device |
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| Zhang Juntao,Yang Chao.Design and Implementation of Audio System in Train Solid Recording Device[J].Computer Measurement & Control,2011,19(4). |
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| Authors: | Zhang Juntao Yang Chao |
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| Affiliation: | Zhang Juntao,Yang Chao(School of Electronic and Information Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China) |
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| Abstract: | According to requirement of train solid recording device for radio station sound recording,the audio system based on embedded Linux is introduced in this paper,which is constituted by AT91SAM9261 microprocessor and UDA1341TS audio processing chip.The software and hardware design methods are proposed,using the synchronous serial controller of microprocessor(SSC) and universal I/O ports,transmission of the audio data and control signals are realized.The DMA transmission mode is used in the design of drive pro... |
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| Keywords: | AT91SAM9261 UDA1341TS |
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