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在第七讲介绍了硬件结构原理。这一讲将结合硬件讨论如何编程序。该小系统是一个不带键盘的单路数采显示系统。控制自动采集及显示的程序固化在ERROM 2732中。被采集的数据千、百、十、个位BCD码Q_3～Q_0线送入8031 P 1口的P 1.3～P 1.0线上,再送入8031的RAM 21～24 H单元中。经累加器A再转换成要显示的字形编码,由P 0口送至8255的PA口显示字形。至于那一位LED数码管点
In the seventh talk about the hardware structure principle. This talk will discuss how to program with the hardware. The small system is a single digital display without keyboard system. The program that controls the automatic acquisition and display is cured in the ERROM 2732. The collected data thousand, one hundred, ten, one BCD code Q_3 ~ Q_0 line into 8031 P 1 mouth P 1.3 ~ P 1.0 line, and then into 8031 RAM 21 ~ 24 H unit. The accumulator A is then converted into a glyph code to be displayed, which is sent to the PA port of 8255 from P0 port. As for a LED digital tube point