该程序为51单片机做的频率计,可计频率可达999 HZ.

providing learners for programming with C51, and joining in these web,hopefully finding people with C51 programming so that it will can be studied each other.-providing learners for programming with C 51, and joining in these web, hopefully finding people with C51 programming so that it will can be studied each other.

8051单片机上4*4矩阵键盘的扫描方式4-none

NXP的mifare ultralight　数据手册, 英文版本,完成对电子标签的操作.-NXP" s data mifare ultralight manual, English version, the completion of the operation of electronic tags.

凌阳公司的光敏电阻传感器源代码，代码中注有非常详细的代码功能注释。-Sunplus

MSP430 PS/2键盘接口程序 LCD1602显示。 程序包含对PS/2键盘发送数据的处理，以及如何通过查找表显示所收到的数据，并通过显示缓存显示到1602液晶上。-MSP430 PS/2 keyboard interface program LCD1602 display. Process consists of PS/2 keyboard to send data treatment, as well as how to find table shows the data received and, through the display buffer on the LCD display to 1602.

基于凌阳的 单片机技术的语音控制小车设计 有详细的c源程序和硬件电路 以及最终报告-Based on the single-chip Sunplus Technology voice control car design detail c source code and hardware circuits as well as the final report

中断串口程序-interruption procedures

动态接口采用各数码管循环轮流显示的方法，当循环显示频率较高时，利用人眼的暂留特性，看不出闪烁显示现象，这种显示需要一个接口完成字形码的输出（字形选择），另一接口完成各数码管的轮流点亮（数位选择）。 -display

用交叉串口线连接两块单片机进行双机通信，扫描到有键按下时，键值发送出去，另一块板收到后以0-F方式显示在数码管上。-With cross-serial cable to connect two pairs of aircraft communications microcontroller to scan that there are key is pressed, the key to send out another one after the board received 0-F are displayed in the digital pipe.

单片微机原理及应用,MCS-51硬件结构-Single-chip Microcomputer Principle and Application, MCS-51 hardware structure