51的4*4键盘驱动当按键按下时返回一个值，且只在按下键时返回一次该值，之后返回0；无按键时返回0；包含消抖功能，在键盘的下降沿触发。 基于keil平台...

串口通信，单片机识别窗口之间通信，使用的是STI51-Serial communications, single-chip communication between the identification window, using STI51

移植成功的单片机uc/os-II代码，效果很好的-Successful transplantation Singlechip uc/os-II code, the effect of good

AVR单片机的TCP/IP源码-AVR TCP/IP source

采用ADC0809采集数据，并通过串口上传到上位机，采用C语言编写，简单易懂-using data acquisition, and through serial upload it to the PC using C language. easily understood

EM4001,EM4100等系列只读ID卡读取程序源码-EM4001, EM4100 series of CD-ID card reader FOSS

DS1820 C51 子程序-C51 subroutine DS1820

单片机 keilc51 和 porteus 组合仿真，用单片机实现跑马灯功能，初步了解单片机的功能和接口方面应用-keilc51 和 porteus 组合仿真，用单片机实现跑马灯功能，初步了解单片机的功能和接口方面应用

单片机和电脑串口通信实现自动堆垛机控制，采用汇编编程，实现串口通信。-Microcontroller and the computer serial communication for automatic stacking machine control, using assembly programming, serial communication.

把单片机串口通讯改造为SPI通讯接口源程序，使用C51语言编写，可以用于MCS8051单片机-put microcontroller serial communications to transform SPI interface source, the use of C51 language, which can be used Mcs8051 MCU

本设计采用ATMEL公司的AT89S52单片机和红外遥控技术实现近距离无线通信的软硬件系统。为了使受控设备识别信号，设计一种数字信号编码系统，利用红外线将数字信号调制，而数据的解码则由另外的单片机完成，系统的实现简单。-This design uses ATMEL Corporation AT89S52 MCU and infrared remote control technology to achieve a short distance wireless communications hardware and software systems. Controlled equipment in order to enable the identification signal, the design of a digital signal coding system, using infra-red digital signal modulation, and data from other single-chip decoder completed, the system simple.