GUI files, for reference ~ no need of us would not have downloaded, it

ping指令详解, c语言编写，适用于pc机，稍加修改就可以移植到嵌入式系统中。-Detailed ping command, c language, applicable to pc machine, a little modification can be ported to embedded systems.

 NEC单片机做的燃气表，用CPU卡实现能量的读写，LCD显示，能量用磁阻传感器，内部有原理图与PCB.

电梯轿厢控制信号的无线传输技术，完成控制信号的无线化传输，实现电梯轿厢无随行信号电缆。该无线传输装置可实现

该装置由8块LED、RS-232C等外设构成，内核为H8，具有以下功能。  通过使用RS-232、Xmodem 通讯，进行命令文件的下载功能。  通过8块LED根据命令进行各种模式的显示功能。 -The device consists of 8 LED, RS-232C and other peripheral structure, the kernel for the H8, has the following features.  by using the RS-232, Xmodem communications, command files to the download function.  by 8 LED under the command of various modes of display.

每次开机都将次数加1 并存储到EEPROM。这样就能直观的看到机器的使用次数。用P1口 LED做为显示，次数大于256是将溢出，按复位模拟开机 或者直接通过开关开机。-Each boot will add a number of times and stored in EEPROM. This will be able to see the intuitive usage of the machine. As with the P1 port LED display, frequency is greater than 256 is the overflow, according to reset the boot, or directly through the analog switch boot.

i.MX开发板原理图-i.MX development board schematics

8051模拟I2C，I2C单字节读写和多字节读写

linux device driver for fifo algorithm

51编程器的原理图，PCB以及PC机软件打包下载，欢迎下载-51 programmer schematic, PCB and the PC-software package to download, please download the

电磁兼容中的接地技术-of EMC grounding