用Keil开发的基于C51的中断学习程序，LED显示。按键接在P3.2口，按一次按键，数码管显示加一，在0~9之间循环。注意数码管共阴还是共阳，附上程序对应单片机原理图。本人亲写-Keil development with the interruption of C51-based learning process, LED display. P3.2 access keys in the mouth, according to a button, digital display plus one in the cycle between 0 to 9. Attention to digital tube or a total of a total of yin-yang, accompanied by the corresponding single-chip schematic procedures. I wrote the pro-