密码锁，含按键操作和液晶显示程序，已测试通过的仿真程序，可参考-Lock, with key operation and LCD display program has been tested through the simulation program, refer to

数字密码锁，数字密码由4*3键盘输入，密码输入正确时，lcd屏上显示正确的密码，并显示OK；密码输入错误时，lcd屏上显示ERROR。-Digital lock, numeric password is scanned the 4* 3 keypad, when you enter the correct password, lcd screen displays the correct password and OK when you enter the wrong password, t