该程序从串口接收数据，通过LCD显示数据。在LCD的第一行显示出来,当数据过多时（超过16个字符），LCD第一行将会被覆盖。该试验使用的晶振是11.0592,如果使用12M晶振，会出现串口接收不正常的情况。原因是用12M晶振，波特率9600时的误差率达 8 。-The program receives data from the serial port through the LCD display data. The first line in the LCD display out, when data is excessive (more than 16 characters), LCD will be covered by the first line. The trial use of the crystal is 11.0592, if you use 12M crystal, there will be serial port to receive an abnormal situation. The reason is to use 12M crystal, when the error rate of 9600 baud rate of 8 .