C51很好的IO模拟串口程序，也称软件UART。只需用一个定时器，实现中断接收。程序编写得很规范，有很多个晶振频率和串口频率可选。是一个比较好的软件串口程序。...

ICCavr编写的TWI总线协议读写函数，测试通过-ICCavr prepared by TWI bus protocol to read and write function, the test

利用PWM原理控制电磁阀的实例，对于这方面研究的人很有价值-Use of PWM control of solenoid valve principle examples of research in this area were of great value

点阵液晶8*8点阵ASIIC字符全驱动，只需修改字符串内容既可实现现实内容-8* 8 dot-matrix characters ASIIC whole drive, but only a modification of the string content can realize the reality content

用C8051F020做的一个船进水检测系统-C8051F020 do with a boat influent Detection System! ! Ha ha

使用89S52为核心做的USB键盘,注意修改了一下windows设备描述符以及端点处理等就行了。用了一个4*4的小键盘,有0-9十个数字键, Num Lock键,Caps Lock键,Shift键,Ctrl键,Alt键,回车键等。 最多可以有三个键同时按下，如果相交的话，最多只能两个键按下-89S52 use as the core of the USB keyboard to do, pay attention to modify the look and the windows device descriptor, such as treatment endpoint on the list. Used a 4* 4 small keyboard, has the number keys 0-9 10, Num Lock keys, Caps Lock key, Shift key, Ctrl key, Alt key, enter key and so on. Can have up to three keys pressed at the same time, if the intersection, then a maximum of only two keys pressed

一个红外解码的源程序~用来解码大多数的红外线遥控编码~-An infrared source ~ used to decode decoded most of the infrared remote control codes ~

keil 资料-keil information

5045的c语言读写程序，经过验证，可以直接使用-5045 of the c language to read and write process, after authentication, direct access to

ATMEL ARM7的一款芯片应用实例,可以在IAR上面运行-ATMEL ARM7 application example of a chip can run IAR above

用AT89S52编写的12864显示的方波！-AT89S52 prepared with 12,864 square display!