I collect and write their own routine part of 51 series for your reference

本系统利用凌阳SPCE061A单片机原理，设计了一种双向超声测距系统，与一般的超声测距系统相比，除具备一般测距系统具有的功能外，该系统还具有低功耗、高精度、工作可靠、人机交互界面友好等优点。由于超声传播速度与环境温度相关而采用声速温度自动补偿技术，根据测量不同距离和不同的反射材料，回波信号强度从几毫伏到几百毫伏变动，因而采用两片AD603组成AGC自动增益控制电路与低噪放大器 NE5532 级联使用的方式组成超声检测信号放大电路，提高超声检测系统的检测范围和系统的适应性，使的系统获的较好的整机性能。由于超声波的传播距离与它的振幅成正比，为了使测距范围足够远，可对单片机输出方波信号进行功率放大后再加在超声波换能器上，因而先由三极管8050进行功率放大，再通过由六非门CD4049接成推挽方式的驱动电路将振荡信号的幅度放大一倍，再接到超声波换能器，从而增加了超声波的传播距离，扩大了测距范围。-err

单片机控制的智能小车开发报告，以及流程。-Microprocessor Controlled Intelligent Vehicle Development Report, as well as the flow.

基于MSP43O单片机的I2C总线软件包-MSP43O based SCM package I2C Bus

单片机最小系统，两位LED数码管由串口输出接两个164驱动，Lout,Rout为左右声道输出，SET， ALT0， ALT1为三个按键，也可自己在开始的I/O定义改成你想用的I/O口；12M晶振若用89C51则只可装下约14首歌曲，用89C52则可装下近40曲-smallest SCM system, two LED digital serial output from the pipe then two 164-driven, Lout, Rout for about channel output, SET, ALT0, ALT1 to three keys, but also his own in the beginning I/O definition you want to change the I/O port; If using crystal 12M 89C51 can carry only about 14 songs, can be loaded with 89C52 Near 40

汇编语言，用定时器中断，实现输出占空1比1的方波波形-Assembly language, using the timer interrupt, the realization of output accounted for one than the one empty square waveform

此程序为单片机编程，主要实现无线收发功能，所使用的无线芯片为PTR4000。-This procedure for single-chip programming, the main function of wireless transceivers used for wireless chips PTR4000.

本代码应用于430单片机的2274系列，看门够指令使得P1.0口的灯间歇性亮灭。-This code applies to 430 MCU 2274 series, porter enough instruction makes the mouth of P1.0 intermittent bright lights out.

430单片机,键盘实验源码,实验通过调试-430 single-chip microcomputer, keyboard-source experiment, experimental, through debugging

msp 的开发实例程序，好东东哦，，需要的朋友快的下啊-Examples of procedures for the development of msp, good Dongdong Oh, the need for the next fast friends ah

脉冲测速代码。在51单片机上使用。可用于电动机。-Pulse Speed code. 51 SCM in use. Can be used in electric motors.