S08例程：本程序是I/O模块的例程，所用资源为单片机通用IO接口，所接器件为LED灯， 其中D2与PTA0，D3与PTA1相连接！-S08 routines: this process is I/O modules, routines, resources used for the single-chip general-purpose IO interface, the access device for the LED lights, which D2 and PTA0, D3 and