用单片机I/O口模拟总线形式的通用驱动程序，用C51编写

CC2420+PA 一个CC2420加PA的PCB板图，载频是2.4G-CC2420+ PA a CC2420 plus PA

此书为keilC的调试心得，有助于开发过程中错误的理解，积累开发经验！-Debugging keilC book for ideas and help to develop understanding of the process error, the accumulation of development experience!

作品简介:基于51单片机的信号发送器,理论距离是3000米,实际受到现实的干扰,信号发送距离降缩短到1500米以上.可以配备多个接收器,实现多机通讯. 作品作用:例如手动输入A,B,C,D 80个不同的信号,启动发送,那么配备的多个接收器能接收到这80个信号. -Work Description: 51 single-chip microcomputer-based signal transmitter, theoretical distance is 3000 meters, the actual interference by the reality, the signal sent down to shorten the distance to 1,500 meters. Can be equipped with multiple receivers, the realization of multi-machine communication. Work role: For example, manually enter the A, B, C, D 80 different signals, start to send, then equipped with a number of receivers that can receive signals 80.

此程序为AD9850（DDS）直接数字频率合成器C语言源码。用125M的有源晶振，频率无失真输出可达到40M。该程序包括FYD12864LCD显示程序加4X4矩阵键盘扫描，可步进1M，1K，和任意频率输入。及相位设置。-This procedure for the AD9850 (DDS) Direct Digital Frequency Synthesizer C language source code. With 125M active crystal, the frequency output can be achieved without distortion 40M. The process includes the display program FYD12864LCD plus 4X4 matrix keyboard scanning, may be stepping 1M, 1K, and arbitrary frequency input. And phase settings.

基于单片机的嵌入式USB主机研究与实现，一篇好文章-Based on Single Chip Embedded USB Host Research and realize, a good article

简易数字温度计的设计与制作简易数字温度计的设计与制作-Simple digital thermometer design and production of simple digital thermometer design and production

分的股份的干热风刮大风歌虽然广泛的随风的说法都是-Sub-shares干热风song though the wind is strong and a wide range of wind that are

HITECHPICC 在picc 下的函数调用 好好的-PICC HITECHPICC in function call under the good

这是一个LED液晶显示的程序...有多个接口..可以用的我用过-This is a LED LCD procedures ... .. a number of interface can be used with the I

电子秒表的设计 1、用系统8253定时器提供的55ms定时单位，设计秒表定时程序。 2、有关系统定时方法： PC机系统中的8253定时器0工作于方式3，外部提供一个时钟作为CLK信号, 频率：f=1.1931816MHz。 定时器0输出方波的频率:fout=1.1931816/65536=18.2Hz。 输出方波的周期Tout=1/18.2=54.945ms。8253A每隔55ms引起一次中断-Electronic stopwatch design one, using the system timer 8253 provides 55ms timing units, design stopwatch timing procedures. 2, the system timing method: PC system timer 0 of 8253 working in the way of 3, to provide an external clock as the CLK signal, the frequency: f = 1.1931816MHz. Timer 0 output square wave frequency: fout = 1.1931816/65536 = 18.2Hz. Cycle square wave output Tout = 1/18.2 = 54.945ms. 8253A every 55ms caused a disruption