说明：  编写一个函数，用来设定字符在液晶上显示的位置。 注：每一个汉字位置都有固定的地址，设定不同的地址即可在不同的位置上显示字符，关于其显示位置及地址请参照RT12864HZ资料的汉字显示坐标。
(Write a function that is used to set the position of the characters displayed on the LCD. Note: each character location has a fixed address in the set of different address can be in a different location on the display characters, characters display coordinates on its display location and address please reference RT12864HZ item.)