1, the circuit: Reference Parallel Interface input and output, adds RS flip-flop circuit, the output control T0 (P3.4) external count input.   Program: an external pulse meter, LED digital display segment plus one. 2, circuit: Reference 2. Parallel Interface input and output, adds RS flip-flop circuit, the output controls the external interrupt-INT1 (P3.3).         Program: for each interrupt on the left of the first LED digital display counts.

新建文件夹\3.1 外部计数溢出中断显示LED段位.c
..........\3.2 外部中断INT1触发的计数.c
新建文件夹

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