由拨码开关通过数据线D0-D7向DSP输入0-255数据，DSP收到数据后通过D8-D15向发送收到数据的到发光二极管进行显示,From the allocation of key switches through the data lines D0-D7 to the DSP input 0-255 data, DSP receive data through the D8-D15 to send received data to the light-emitting diode displa