采用点阵字库显示 ，创建ASCII字库和汉字字库，显示大小可以根据实际情况修改，设计了字符显示程序，以及在单个字符显示的基础上开发字符串显示-The program uses a dot matrix character display, create the ASCII character and the character font display size can be modified according to the actual situation, design a character display program, and developed on the basis of display in a single character string display