很有用的一些从用代码 有keil编译实现的 可以

C51单片机控制系统代码升级程序通讯协议。-C51 single-chip control system communication protocol code upgrade process.

/*P89CXX编程控制CPU接收和控制程序*///定义编程需要的CPU类型0:P89C51 1:P89C52 2:P89C54 3:P89C58 4:P89C51RC 5:P89C51RD

基于MPX4105的数字气压计，用单片机控制，希望大家喜欢！-MPX4105 figures based on the barometer, using single-chip control, I hope everyone likes!

八路抢答器，有计时功能，计分功能当有选手抢答时可以显示台号-Octal Responder, with time-keeping. Scoring function

这个是SOC的芯片，是杭州万工的产品。可用于单相简单的电子式电度表的开发。资源比较丰富，可供参考-This is the SOC chip is the industry" s products, Hangzhou 10000. Can be used for a simple single-phase electronic power meter development. Resources are relatively abundant, available for reference

is about the 51 and the LCD-is about the 51 and the LCD

基于51单片机系统，利用AD转换芯片ADS7841，数码管驱动芯片CH452，以及CD74HC4051、CD74HC259、CD74HC154、74HC244等接口芯片实现二十路以上的电压监测、显示与通断控制。编程环境：keil-Based on 51 single-chip microcomputer system, using AD conversion chip ADS7841, digital tube driver chip CH452, and CD74HC4051, CD74HC259, CD74HC154, 74HC244 interface chip such as the way to achieve more than twenty-voltage monitoring, display and on-off control. Programming environment: keil

接触式IC卡的读写函数，IIC通信模式的源代码-Contactless IC card reader function, IIC communication model" s source code

实例01、GPIO实验－熟悉开发环境，以及程序下载和调试-Example 01, GPIO Experimental- familiar with the development environment, as well as download and debug

键盘扫描程序 台湾义隆EMC汇编,程序后缀DT C0-C3 R0-R5 4*6键扫-keyboard Scan Taiwan Elan EMC compilation procedures suffix DT C0-C3 R0-R5 4* 6 keys sweep