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在TP-801A单板机上,不用定时器CTC而用软件产生时、分、秒、实时时钟的程序,是一个很好的演示性程序,有一定的实用性和典型性,而在教学上这是一个难度较大的实验。周明德主编的《微型计算机硬件软件及其应用实验指导书》的第一部分中实验七讲到这个实验,但教材提供的参考程序达不到“由6个数码管从给定的起始值开始计时始终动态地显示时、分、秒”的目的。其原因可分析如下:
In the TP-801A single-board machine, without the timer CTC and software generated when the minute, second, real-time clock program is a good demonstration of the program, a certain degree of practicality and typical, but in teaching this Is a more difficult experiment. Zhou Mingde editor of “Microcomputer hardware and software experimental guide to its application” in the first part of the experimental seven talked about this experiment, but the teaching materials provided by the reference program up to “by the six digital tube starting from the given starting value Time always dynamic display hours, minutes, seconds ”purpose. The reason can be analyzed as follows: