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在分布式弹上遥测系统中,16位DMA技术可以支持远置单元(RT)与中心控制单元(CCU)之间的高速数据通信。本文详细论述了16位DMA通道设计及编程工作情况。针对文中采用以8位DMA控制器来实现16位并行传输这一方案。表明此方案具有结构简单、容易实现、通用性强等优点。并通过在RT中的应用,完成了将每次采集的一帧数据高速送往中心控制单元,这一点已在与总线的联试中得到了验证。
In the distributed on-board telemetry system, 16-bit DMA technology can support high-speed data communications between the remote unit (RT) and the central control unit (CCU). This article discusses in detail 16-bit DMA channel design and programming work. For the article using 8-bit DMA controller to achieve 16-bit parallel transmission of this program. It shows that this scheme has the advantages of simple structure, easy to implement and strong universality. And through the application in the RT, the completion of a high-speed data collected at each acquisition to the central control unit, which has been tested in conjunction with the bus has been verified.