串行通信实验，设置波特率为9600或19200。在计算机断电的情况下，将实验板的串行接口线接到计算机的RS232接口上，计算机通过RS232接口向实验板发送数据，实验板应该能够正确接收到这些数据，并且将接收到的数据显示到实验板的数码管上；当按下实验板的按键时，将接收到的数据正确地发给计算机。-Serial communication experiment, set the baud rate to 9600 or 19200. Power outages in the computer case, the board received the serial interface lines of the RS232 interface on the computer, the computer through the RS232 interface to send data to the experimental board, board should be able to correctly receive the data, and will receive the data shows the experimental board digital tube　When pressing the button board, will receive the data sent to the computer correctly.