通过编码开关（旋转编码器）控制数码管的加减一！程序详细的体现了编码器的编程和数码管的单片机的编程！本程序通过AT89C51和24脉冲编码器的测试

双机通信过程中采用点对点通信的从机部分示例-Two-machine communication process used in point-to-point communications from the machine part of sample

F_Dtecter 单片机频率计 精确度1％以上 -Singlechip F_Dtecter Cymometer more than 1 accuracy

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.

mega128的bootloader程序,上位机采用vb,下位机采用gcc编译-mega128 the Bootloader procedures PC using vb. under the crew used gcc

This a program which performs addition,subtraction,multiplication and division of two 4 bit binary numbers..therefore it is called as 4 bit binary ALU..if u have any doubt,then mail me at prem_bombay@yahoo.co.in -This is a program which performs addition,subtraction,multiplication and division of two 4 bit binary numbers..therefore it is called as 4 bit binary ALU..if u have any doubt,then mail me at prem_bombay@yahoo.co.in

这是sd/mmc卡程序地而部分内容，后面还有！-This is the sd/mmc card program and part of the contents in the back there!

串行写控制字 设置串口工作方式 将控制字写入AD9850-Serial control words written work will be set up serial control words written into the AD9850

ht47r20遥控程序，红外线载波输出频率这系统时钟的12分频，当系统频率为480KHZ，载波频率为40KHZ-ht47r20 remote control procedures, infrared output carrier frequency system clock frequency of 12 minutes, when the system frequency for 480KHZ, carrier frequency 40KHZ

与终端的通讯 1.1 采用标准的UART通讯协议，波特率为9600，没有校验位，一个停止位。 1.2 通讯的过程是主从式半双工的。 1.3 详细的通讯协议参见芮鹤龄的文档。 -2051

单片机动态内存分配代码,实现malloc.-Single-chip dynamic memory allocation code, realize malloc.