电子密码锁，报警，修改密码，输入三次错误自动结束。

这是一个时间陷阱问题,不小心的话就会GAME OVER哦!哈哈!就看你的啦!-This is a time trap, careless words will naGames OVER! Ha ha! See you!

51控制led顺序点亮, 通过控制p0.0使其能按不同的顺序 -Led the order of 51 to control light, through the control to enable them to p0.0 different order

本实例可以实现数制转换，输入输出显示，大小写转换-This example system can achieve a number of conversion, input and output show that the conversion case

微机原理――接口应用编程源码-computer theories-- Application Programming Interface FOSS

ex5_1 I-型线性相位FIR滤波器 ex5_2 II-型线性相位FIR滤波器 ex5_3 III-型线性相位FIR滤波器 ex5_4 IV-型线性相位FIR滤波器 ex5_5 矩形窗频响 ex5_6 希尔伯特变换器设计－汉宁窗 ex5_7 低通滤波器设计－汉明窗 ex5_8 带通滤波器设计－布莱克曼窗 ex5_9 低通滤波器设计－凯塞窗 ex5_11 频率采样技术：低通，朴素法 ex5_12 频率采样技术：低通, 最优法T1 & T2 ex5_13 频率采样技术：带通, 最优法T1 & T2 ex5_14 频率采样技术：高通, 最优法T1 ex5_15 频率采样技术：差分器 ex5_16 频率采样技术： 希尔伯特变换器 ex5_17 利用Parks-McClella算法设计低通滤波器 ex5_18 用PM算法进行的带通滤波器设计 ex5_19 用PM算法进行的高通滤波器设计 ex5_20 用PM算法进行的阶梯滤波器设计 ex5_21 用PM算法进行的差分器设计 ex5_22 用PM算法进行的希尔伯特变换器设计-ex5_1 I-type linear phase FIR filter ex5_2 II-type linear phase FIR filter ex5_3 III-type linear phase FIR filter ex5_4 IV-type linear phase FIR filter rectangular window frequency response ex5_5 Hilbert ex5_6 converter design- Hanning window low-pass filter design ex5_7- Hamming window ex5_8 bandpass filter design- Blackman window ex5_9 low-pass filter design- Kaiser window ex5_11 sampling frequency: low-pass, a simple method ex5_12 sampling frequency: low-pass

用8155扩展51单片键盘控制-8155 with 51 single extended keyboard control

LCD 240*128 T6963C C51程序（1：主程序）-LCD 240* 128 T6963C C51 (1: the main program)

这是PC机间相互通信的例子，程序“require”为用查询方式实现，程序“interrupt”为 用中断方式实现-PC communication among the examples procedures "require" to be used for achieving and procedures "interrupt" for the use of interruption means

264 software source file ,made in C language

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