led跑马灯显示，实现一秒钟闪一次。基础性的代码，比较简单。...

i2c通讯控制程序,很快的实现对24c02的通讯功能-i2c communication control procedures, quickly realizing the communication function 24C02

基于51系列单片机内部定时器写的一个时钟程序-51 Series single-chip based on an internal timer to write a clock procedures

凌阳单片机网络系统源码-Sunplus SCM network source

用C来实现实时时钟。对比与上个汇编语言。-Using C to achieve real-time clock.

自己写的CH452的驱动，用keil C51写的-himself wrote the CH452 drive with the Keil C51 write

这是一个AVR开发板的所有必需的源码，包括原理图，PCb图以及调试用的C例程-This is an AVR development board of all the necessary source code, including schematics, PCb map and debug using the C routines

温度控制~能很好的实现温度传感~ 非常非常的好~-Temperature control ~ can achieve very good temperature sensing ~ very, very good ~

本程序主要通过外部中断INT0及3.3端口读取PS2键盘值并通过LCD1602显示，键扫描码的解码通过数组方式解码，程序的解码功能主要针对数字及大小写字母和常用标点符号 硬件描述：PS2键盘的时钟线（clk）接89S51的INT0（P3.2）,数据线data接（P3.3） LCD的控制端口分别为： RS = P2^7，RW = P2^6，EP = P2^5，数据端口为P0，液晶显示偏压VL必须接 -This procedure mainly through external interrupt INT0 and 3.3 read PS2 keyboard port value through LCD1602 display, key scan code decoder way through an array of decoding, the procedure for decoding function of the major figures and upper and lower case letters and punctuation marks commonly used hardware description: PS2 keyboard clock line (clk) then 89S51 the INT0 (P3.2), data lines data access (P3.3) LCD control port, respectively: RS = P2 ^ 7, RW = P2 ^ 6, EP = P2 ^ 5, data ports for the P0, LCD bias VL must be received

电脑音源切换控制器（带红外功能） 用AT89C251+CD4016切换控制，可控制四路以上的立体音源输入切换，一路立体声输出,有红外遥控PC功能。-Computer audio switch controller (with infrared function) with AT89C251+ CD4016 switch control, can control more than four stereo audio input switch, stereo output along the way, has infrared remote control PC functions.

系统按键显示都具有,不同的I/O口,具有很大的参考价值-System button shows have different I/O port, and it is very useful