印刷电路板。键盘控制，矩阵键盘电路。

CH375 主机文件系统接口(支持FAT12/FAT16) MCS-51单片机C语言的U盘文件读写示例程序-CH375 host file system interface (support FAT12/FAT16) MCS-51 single-chip U of C language sample programs to read and write disk files

1302时钟芯片的pic程序，完全可以应用在其他的单片机上（不过好像如果速度太快的要改一下）-1302 clock chip pic procedures can be applied to other MCU (But if the pace seems too fast to change it)

DIY示波器的全部资料，目前很多人都在搞这样的DIY,上传这些资料希望能帮到这些人！-Oscilloscope DIY all the information that many people are currently engaged in this kind of DIY, From the information I hope to help these people!

周立功GUI在avr单片机上的移植 开发环境为IAR

基于51单片机的U盘型MP3设计（含C语言程序，原理图）-51 MCU-based U-disk-based MP3 design (including C language program, schematic diagram)

这是usb mass storage(海量存储)的源代码,欢迎下载-This is usb mass storage (Mass Storage), the source code, download welcome

DS12887C语言程序！是好使的哦！！！！！！！！！！！！！！！！！！！1-DS12887C Language Program! So is the oh! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 1

采用DDS 技术实现了基于DSP 的模拟调制实验模块。包括系统的硬件和软件设计,模拟调制原理,DSP实现模拟调制的方法,同时采用单象限正弦波形存储器结构对DDS 模块进行了改进,提高调制器的性能。-DDS technology using DSP-based implementation of the experimental module Analog modulation. Including system hardware and software design, analog modulation principle, DSP Analog modulation methods of implementation, while a single-quadrant sine wave-shaped structure of the DDS memory module has been improved to enhance the performance of modulator.

P89C668单片机硬件I2C软件包,668i2c.asm（主方式）-P89C668 hardware I2C packages 668i2c.asm (the main form)

用C51编写的源程序清单（由实验板运行通过）包含器件配置文件.闹时启/停子函数.走时函数.定时器T0 5mS初始化.扫描按键子函数.延时子函数等整个工程源代码-with C51 prepared by the source list (from the experimental operation through plate) contains device configuration files. When downtown Kai/stop unreachable. Walking function. T0 5mS initialize the timer. Functions scan button. Functions delay the entire project source code