SCM experiment C source code external interruption, two experiments: 1, outside interrupt count two digital tube display 2 and external interruption counter.
说明：51单片机外中断实验C源码，两个实验：1、外中断计数2位数码管显示；2、外中断计数器。
SCM experiment C source code external interruption, two experiments: 1, outside interrupt count two digital tube display 2 and external interruption counter.
说明：51单片机外中断实验C源码，两个实验：1、外中断计数2位数码管显示；2、外中断计数器。
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