蜂鸣器实验beepmusic（ARM7平台11

PC数字电压表的设计,原理图以及代码,设计文档.此数字电压表的优势在于可以通过串口将测量所得到的电压值传给PC机,这样的话有利用整个数据的采集与分析.上位机采取的是串口通信软件.-PC digital voltage meter design, diagram and code, Design Documentation. This figure voltage meter advantage is through the serial port will be measured by the voltage transmission PC, so is the use of the entire data collection and analysis. PC"s serial port communication software.

本代码是本人毕设所做的GPRS数传系统的软件部分，实现了PPP，UDP，IP协议的分层和打包，实现了嵌入式设计中的UDP/IP协议栈-the code is completed, I set up the GPRS data-transmission system software, to achieve the PPP, UDP, IP protocol layering and packaged to achieve the design of embedded UDP/IP protocol stack

基于mc68hc908qy4芯片实现超声波排障,当检测到障碍物时点亮发光二极管.-Mc68hc908qy4 chip based on the ultrasonic emission barrier, when the detected obstacle when the light emitting diodes.

汇编程序，将tab中的256个数据通过串口发送-Assembler will tab of 256 data sent through the serial port

this program tell you how to connect ps2 to a mcu(for example at89s51)-this program tell you how to connect to a ps2 mcu (for example at89s51)

C到ASM，ASM到C到Keil C

红外通信是利用950nm近红外波段的红外线作为传递信息的媒体，即通信信道。发送端采用脉时调制（PPM）方式，将二进制数字信号调制成某一频率的脉冲序列，并驱动红外发射管以光脉冲的形式发送出去；接收端将接收到的光脉转换成电信号，再经过放大、滤波等处理后送给解调电路进行解调，还原为二进制数字信号后输出。-Infrared communication is the use of near infrared 950nm infra-red as the transmission of information media, namely communication channel. The sending end when the use of pulse modulation (PPM) approach will be a binary digital signal into a frequency modulation of the pulse sequence, and driver fired infrared tube to the form of light pulses sent receiver will receive the pulse of light conversion to electrical signals , and then, after amplification, filtering and other treatment to the demodulation circuit after demodulation, reduced to a binary digital signal after the output.

nRF2401芯片的各种资料以及pcb板图吐血推荐。-nRF2401 chips as well as various types of information recommended pcb board plans hematemesis.

该压缩包内还有51单片机常用各类外设驱动C程序源码（128*64点阵屏，DS18B20温度芯片，I2C，DS1302时钟芯片，AT24C16（I2C接口）及X5045P（SPI接口）EEPROM等等），每个都绝对可用。每个驱动程序都有一个C文件和对应的H文件，文件名即为驱动芯片类型。-The compressed package of 51 common types of single-chip peripherals drive C program source code (128* 64 dot matrix screen, DS18B20 temperature chip, I2C, DS1302 clock chip, AT24C16 (I2C interface) and X5045P (SPI Interface) EEPROM and so on), each is absolutely available. Each driver has a C file and the corresponding H file, the file name is the type of driver chips.

详细介绍MP3的编码原理,有大量图示,好看就要顶下,-Detail MP3 encoding principle, has a large number of icons, we should look under the roof,