DSP覆盖(Overlay)程序设计  

DSP overlay program design

作　　者：吴洁[1] 李尚柏[1] 

机构地区：[1]四川大学原子核科学技术研究所辐射物理及技术教育部重点实验室,四川成都610064

出　　处：《电子设计工程》2014年第21期52-55,58,共5页Electronic Design Engineering

摘　　要：Overlay程序设计技术的基本原理是利用模块化设计思想,将任务划分成多个功能模块,在内存中只加载当前需要执行的模块,不加载其他暂不执行的模块。但当其他模块需要执行时,首先将内存中的模块卸载,然后将需要执行的模块再加载到内存。就内存的使用情况而言,Overlay技术与动态链接库是非常类似的。本文以TM320C6000系列DSP为目标平台,通过一个具体实例给出开发DSP覆盖(Overlay)程序设计技术的方法和实现步骤,详细地讨论了Overlay程序设计技术各个环节。The fundamental of the overlay program design technology is to divide the task to several function modules through the modularized designing idea. The memory just need to load the module which would be executed currently, and do not load the others . When the other modules need to be executed, the modules in memory would be unloaded firstly, and then the modules need to execute would be load to memory. As far as the usage condition of memory to be concerned, overlay technology and dynamic link libraries（DLL） is highly similar. With the target platform of TM320C6000 series DSP, this article provide the ways and implementation steps for DSP overlay program design technology through a concrete instance, and discuss every link of the overlay program design technology in detail.

关 键 词：Overlay程序设计技术 DSP TM320C6000 模块化设计 

分 类 号：TN919.5[电子电信—通信与信息系统]