ST7920液晶显示控制器的驱动编程，实现了汉字显示、半字符显示、最大128*64的图形显示自造字的显示以及屏幕左右移动和上下滚动-Driver LCD controller-driven programming, the Chinese realize that half of characters, the greatest 128* 64 graphics since the creation of the display screen from top to bottom and move around and rolling