这里有一个单片机密码锁的程序，具体功能是

这个范例说明如何使用8051， LCD显示器和4ⅹ4的小键盘，制作一个密

码锁。PORT 1 连接到LCD显示器的数据线。PORT 3 的P3.3,P3.4和P3.5分别

连接到LCD显示器的控制线。PORT 2连接到4ⅹ4的小键盘，可以输入密码。

执行修改密码或是时间的程序时，首先让LCD显示器显示出时间和日期。

当用户按下4ⅹ4小键盘的按钮 A 时，可以输入密码。如果密码正确时，就

会让 P3.6的 LED 闪烁，表示打开锁。如果密码不正确时，LCD显示器就会

显示出

"PASSWORD WRONG"。

当用户按下4ⅹ4小键盘的按钮 B时，可以修改时间。

当用户按下4ⅹ4小键盘的按钮 C时，可以修改密码。*/



编译环境 Keil uVision3，系统 winxp3-There is a single chip program lock, the specific function is

　　This example illustrates how to use the 8051, LCD monitor and 4 ⅹ 4 small keyboard, making a

Close

Code lock. PORT 1 LCD monitor connected to the data lines. PORT 3 of the P3.3, P3.4 and P3.5 points

Do not

LCD monitor connected to the control line. PORT 2 is connected to 4 ⅹ 4 keypad, you can enter the password.

Implementation of the procedures or time to change the password, the first LCD monitors to display the time and date.

4 ⅹ 4 when the user presses the button A small keyboard, you can enter the password. If the password is correct, it

The LED will flash P3.6, that opens the lock. If the password is not correct, LCD display will

Show

"PASSWORD WRONG".

When the user presses the 4 ⅹ 4 button keypad, B, can be modified.

4 ⅹ 4 when the user presses the button on the keypad C, you can change your password.*/