PC端发送3个数据 n0,n1,n2

n0=0,写，将n1写入n2地址中

n0=1，读，读出n1地址中的数据，n2不起作用，但必须有

收到一个字节后，将其地址值显示在数码管第1、2位上，数值显示在第5、6位上

读出一个字节后，将其地址值显示在数码管第1、2位上，读出的值显示在第5、6位



上-PC client to send three data n0, n1, n2　n0 = 0, Writing, n2 to n1 write address　n0 = 1, read, read out the data n1 address, n2 does not work, but there must be　close to a byte, it will show the value of its address at the first 1,2-bit digital tube, the value displayed in the first place on 5,6　read a byte, it will address the value of its digital control display at 1,2 bit on, read out the value displayed in the first place on 5,6