该C文件是在凌阳61板开发系统下编写的液晶显示器YM12864的驱动程序，重点是如何控制凌阳61的引脚以与显示器间进行通信12864-The C file is written under the Sunplus 61 board development system liquid crystal display YM12864 driver, focusing on how to control the Sunplus 61-pin to monitor inter-communication