LCD测试程序,内有键盘,显示等.大家不防看看.

web51 的一种实现-a solution of the web51

超声波测距 利用 送接受的时间 差计算得到距离-Ultrasonic Ranging acceptable use to send the time difference calculated by the distance

3*4键盘扫描程序 已加消抖功能 可以扩展为4*4~~~ 只用8个I/O口就能实现-3* 4 keypad scanner Buffeting extinction have been added functions can be extended to 4* 4 ~ ~ ~ only eight I/O port will be able to realize

正弦信号发生器DDS AD9850 正弦信号发生器ad9850实际键盘（经典）-Sinusoidal signal generator signal generator sine DDS AD9850 actual keyboard AD9850 (classic)

C8051F120单片机TCP协议栈,主体眶架,从美国人LIB库中导出-C8051F120 single-chip TCP protocol stack, the main orbital plane, from the American Library LIB Export

本人at89c51snd1c主控IC增加了128*32点阵驱动显示，帮助MP3DIY者学习用-I at89c51snd1c control IC increased by 128* 32 dot matrix display drive to help those who learn MP3DIY

max7219仿真及代码,已经经过调试,供大家参考使用,内有仿真源文件-max7219 simulation and code, had already been debugging for reference use within the simulation source files

带有退格键的键盘输入程序 (for MSP430)，修正厂家代码中对退格键不支持的错误-Backspace with the keyboard input program (for MSP430), to amend the code of manufacturers backspace does not support error

数字钟是一种用数字电路技术实现时、分、秒计时的装置，与机械式时钟相比具有更高的准确性和直观性，且无机械装置，具有更更长的使用寿命，因此得到了广泛的使用。数字钟从原理上讲是一种典型的数字电路，其中包括了组合逻辑电路和时序电路。目前，数字钟的功能越来越强，并且有多种专门的大规模集成电路可供选择-Digital Clock is a digital circuit technology with the hours, minutes, seconds, timing devices, as compared with the mechanical clock has a higher accuracy and intuitive, and no mechanical devices, with more longer life, so be a wide range of use. Digital clock from the principle of speaking, is a typical digital circuits, including combinational logic circuits and sequential circuits. At present, the digital clock and more powerful, and there are a variety of specialized large scale integrated circuits to choose from

单片机串口通信的简单例程，供需要的人参考-A simple microcontroller serial communication routines for those who need it for reference