这是LCD比较不常用的一种调用的写法，缺点是繁琐，而且显示的时候经常会有问题。LCD用的是1602，发在这里位了让新手参照理解一下就好。多注意程序里面的延时-It is less commonly used in LCD wording of a call to the disadvantage of cumbersome, but also shows that when there is often a problem. LCD using a 1602, made here for pla