程序功能： 本程序结合了24C02存储器的存储功能，可以掉电保存密码。第一次运行时，若输入000000原始密码后无反应，可以试验着将主程序中前面的一小段被注释线屏蔽的程序前的注释线删掉，然后重新编译下载（可以将密码还原为000000）。此后，再将这小段程序屏蔽掉，再编译下载。方可正常使用。1、开锁：下载程序后，直接按六次S7（即代表数字1），8位LED亮，锁被打开，输入密码时， 六位数码管依次显示小横杠。2、更改密码：只有当开锁（LED亮）后，该功能方可使用。首先按下更改密码键S16，然后设置相应密码，此时六位数码管会显示设置密码对应的数字。最后设置完六位后，按下S17确认密码更改，此后新密码即生效。3、重试密码：当输入密码时，密码输错后按下键S18，可重新输入六位密码。当设置密码时，设置中途想更改密码，也可按下此键重新设置4、关闭密码锁　　 按下S19即可将打开的密码锁关闭。-Program function: this program combines 24 c02 memory storage function, can power-fail save the password. The first operation, if the input 000000 original password no reaction, can test the main program in the front of the a small section of the comment line screening program before the comment line out, then to recompile the download (can be password reduction for 000000). Since then, then this small segment of a program, shielding off, recompilation download. Can be normal use. 1, unlocking: download procedures, directly according to six times S7 (namely represent Numbers 1), eight LED light, lock is opened, password, six digital tube display in small shaft. 2, to change password: only when the lock (LED light), this function can be used. First press to change password key S16, then set the corresponding code, the six digital tube will display set password corresponding digital. The last set the six, press S17 confirm password change, then the new password is effective. 3, retry pas