4x4键盘的程序，新思路，希望能对大家有所帮助。

Atmel 8515 RC5 decoder

16C84的使用例程：包括16C84的RB口中断程序和16C84做的智能卡程序。-16C84 use routines include : 16C84 RB I interrupt procedures and 16C84 do smart card procedures.

C8051F040 t3可调频率方波输出例程-C8051F040 adjustable frequency square-wave output routines

功能 : 1602字符型液晶显示驱动 开发环境：WinAVR 硬件环境：ATMEGA32/AVR开发板 创建日期：2008-3-27 最后修改：2008-3-27 作 者：bjj9217@163.com-Features: 1602 Character LCD Driver Development Environment: WinAVR hardware environment: ATMEGA32/AVR development board creation date :2008-3-27 last modified :2008-3-27 Author: bjj9217@163.com

C8051F310单片机应用程序，模拟量(电压）的采样,比较器,LCD显示,SPI通信,FRAM读写,温度测量程序，PCA捕捉，键盘扫描，USB与RS232转换实验等。-C8051F310 single-chip applications, analog (voltage) of the sampling, Comparators, LCD display, SPI communication, FRAM read and write, the temperature measurement procedure, PCA capture, keyboard scanning, USB and RS232 conversion experiments.

rc500 c语言库函数，对RC500的开发提供了捷径-rc500 c language library functions, the development of RC500 provides a shortcut

键盘与显示，按下相应的按键，数码管就显示相应的数字-The keyboard and display, press the corresponding button, digital controls, it displays the corresponding figure

pwm改变占空比的程序，已调试过，可以直接用KEIL使用-pwm duty cycle to change the procedures have been debug, and can be directly used by KEIL

51单片机开发的8道门出入记录控制板，具有RTC时钟功能，同时具有声光抱紧，能实时的记录被监控门的打开时间。本案例只有8路，但可以方便的扩展至32路。-51 MCU development of 8 door access control panel recorded with RTC clock function, both sound and light to hold fast, can be monitored real-time record of the time the door opened. This case is only 8-way, but can be easily extended to 32.

一款操作128x64 图形液晶显示屏的完整 C51 程序，里面有关于汉字及图形的显示程序-A 128X64 graphic LCD screen to operate the complete C51 procedure, which has on the characters and graphics display program