编程在十位和个位两个数码管上显示“56”,没有用到的数码管可以利用8芯排线将数码管的位码口JP8连接到逻辑电平开关JP10，并将开关全部打到“0”状态，起到屏蔽的作用-Programming in 10 and a two-bit digital tube displays " 56" , there is no use of digital control can use the 8-core cable digital tube mouth JP8-bit code to connect to the logic level switches JP10, and will switch all hit " 0"　state, play a role in shielding