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以某光电产品的信息处理系统为研究背景,介绍了某光电跟踪产品双 DSP 的系统结构,以TMS320C6201B 从 ADSP2187L 获取数据为例,详细介绍了 DMA 通讯的工作机理和工作流程,以及利用宏方便地完成寄存器以及各位定义的方法,给出了软件编程步骤及方法,同时以 TMS320C6201B 为例,简要介绍了 DMA 中断服务程序。研究及实践表明当数据量较大时,通过 DMA 方式完成 DSP 间源数据和目的数据的搬移将大大节约机时,提高了 DSP 的运行效率。
Taking the information processing system of a photoelectric product as the research background, this paper introduces the system structure of a double-DSP of photoelectric tracking product. Taking the data of TMS320C6201B from ADSP2187L as an example, it introduces the working mechanism and workflow of DMA communication in detail, Complete register and the definition of each method, gives the software programming steps and methods, taking TMS320C6201B as an example, briefly introduces the DMA interrupt service routine. Research and practice show that when the amount of data is large, the transfer of source data and destination data between DSPs by means of DMA will greatly save machine time and improve the operating efficiency of DSP.