数码管显示秒表, 分辨率0.01s K1---控制按钮 第一次按下时, 启动开始计时 第二次按下时, 停止 第三次按下时, 归零 秒单位,寄存器与数码管对应关系:-Digital LED display stopwatch with a resolution of 0.01s K1--- when you press the control button for the first time, start time begins when the second press, stop press, when the third, zero seconds flat, register with the digital control corresponding relationship: