电子密码锁，报警，修改密码，输入三次错误自动结束。

一个不怕掉电的超级万年历源程序及文件，非常有意思，大家还可以提出修改意见！-A super-power-down calendar is not afraid of the source code and documentation, very interesting, everyone can make changes!

遥控解码汇编程序， 遥控解码汇编程序-Assembler decoder remote control, remote control decoder assembler

Tiger语言编译器-Tiger language compiler

PWM控制电机,编辑控制方式。在这个DEMO里建了一个函数F_Pwm(int a,int b) 用于PWM设置，传入两个参数第一个用于频率设置，第二个用于占空比设置。另外还开了外部中断可进行频率和占空比的步进，从而达到调整速度的目的-PWM motor control, edit control mode. In this DEMO was built inside a function F_Pwm (int a, int b) for the PWM settings, with two arguments the first one for the frequency setting, the second set for the duty cycle. It also opened the external interrupt can be the stepping frequency and duty cycle to achieve the purpose of adjusting the speed of

将系统时间显示出来 由汇编语言编辑而成 可应用于课程设计等项目-The system time display made by assembly language editor can be used in curriculum design and other projects

基于Intel 8253定时器的两端Asm，包括配套电路，流程图  1。设计基于ISA总线的Intel 8253 的接口电路，用Intel 8253 的1个通道作定时器，演奏C调的各个音符，利用查表程序的方法依次演奏，每个音符演奏1s，停0.5s 演奏三遍后退出程序 2。利用Intel 8253的一个通道产生一个100Hz的方波，用示波器测试信号的正确性  以产生的方波作为另一个通道门控信号。利用此通道测量其高电平的宽度，在PC机显示屏上显示其数值并退出程序 -based on the Intel 8253 timer at both ends of programmers, including matching circuit, flowchart

NN矩阵键盘的扫描，并读取键值,PIC开发源程序-NN matrix keyboard scanning, and reading keys, PIC development program

AT89S51的并行口P1接4×4矩阵键盘，以P1.0－P1.3作输入线，以P1.4－P1.7作输出线；在数码管上显示每个按键的“0－F”序号。-AT89S51 the parallel port P1 then 4 × 4 matrix keyboard to P1.0-P1.3 as input lines to P1.4-P1.7 for output line in the digital control button displayed on each of the " 0-F" serial number.

hello.c program sample

这个程序我花了好久才写出来的,非常的好,它可以产生很高性能的三角波,一般程序不易产生如此好的波形.-this process I have spent a long time before the writing, very good, and it can produce a very high-performance triangular wave, the general procedures have not been so good waveform.