Based on Single Chip Embedded USB Host Research and realize, a good article

usbio的上位机动态连接文件，Ver 2.41-PC usbio the dynamic link file, Ver 2.41

电子秤,能显示重量,设置重量,超量程报警-Electronic Scale showing the weight, set the weight, ultra-range alarm

uCOS－II 在51单片机上移植的源码-for uCOS-II in 51 MCU transplant FO

gm8123串口扩展开发程序，适合初学者。-gm8123 serial port expansion development process, suitable for beginners.

用于把上位机的数据，文字编码发送到下位机，用于实事或以不现实-Used to host computer data, text encoding to send to the next-bit machine for practical or impractical

AVR单片机上跑的MMC卡加FAT16文件系统的例程-AVR run MMC Cagayan FAT16 file system routines

使用MSP430控制AD9854产生任意信号-MSP430 to control the use of arbitrary signals generated AD9854

常用元件汇总，包括：1N系列二极管、74系列、4000与4500、变容二极管参数、常用二极管、常用芯片、场效应管性能、光电器件、横流二极管、快恢复二极管、三极管等-Summary of commonly used components, including: 1N series of diodes, 74 series, 4000 and 4500, Varactor parameters, commonly used diodes, commonly used chip FET performance, optoelectronic devices, cross-flow diodes, fast recovery diodes, transistors, etc.

音乐C程序 是一首优美的音乐，可直接下载到51单片机里演揍。-Music C program is a beautiful music, can be directly downloaded to the MCU 51 years played beat.