用普通字符型16*2液晶显示自定义字符的程序，keil工程文件，可以显示年月日等汉子，内含多种子程序，大家可以直接取子程序来用，也可以举一反三，定义自己需要的字符-16* 2 character with ordinary liquid crystal display custom character program, such as man can display month, day, containing a variety of routine, we can take the subroutine to use, you can learn by analogy, define their needs characters