此程序为自行车计附带产品．可以计里程，计速度．清零等功能．采用霍尔传感器传输信号，单片机采用中断扫描．然后用数组的形式在LED上显示．-procedure for bicycles or spin-off products. Total mileage can be up speed. Reset function. Hall sensor used for signal transmission interrupt SCM scan. Then in the form of an array