...词：51单片机；多任务；动态显示；键盘显示控制 [gap=798]keywords：51 single-chip computer; multitask; dynamic scan display; keyboard and display control ...
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Meanwhile, it describes the dynamic scan display of LED by using a soft timer.
同时介绍了利用软定时器实现LED定时动态扫描显示方法。
This system has high economy because of using itinerant monitor to analogy signals that made by PLC modules, using LED display and scan keyboard as press buttons that made by PLC dynamic I/O modules.
用PLC模块构成多路模拟量巡检，用动态I/O模块实现LED显示及扫描键盘按钮，使系统具有较高的经济性。
System software part of the preparation of the use of C language SCM process, including the main program, dynamic scanning display routines and key scan subroutine and so on.
系统软件部分运用C语言编制单片机程序，主要包括主程序、动态扫描显示子程序和按键扫描子程序等。
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