用4个开关分别接在PTA4~PTA7口通过MCU控制分别接在PTA0~PTA3口上的4个小灯，开关拨在“ON”时，对应小灯亮，否则为暗。-With four switches are connected to the PTA4 ~ PTA7 port by the MCU Control PTA0 ~ PTA3 were connected to the port on the four small lights, switch the " ON" , the correspon