4

说明：  this is pcb mayble maybe not baby

基于Linux下的pwm驱动测试程序，可根据自己的需要修改设备节点。(This is a pwm drivers test procedure based on Linux，you can modify device nodes according to your needs.)

说明：  画波形非常好的波形图要好好的用，游泳就用，没有用就不用下载(wave very well)

DTMF demoludacion algoritm

GUN/Linux编程指南(第二版) Kurt Walla等著，张辉译。清华大学出版社。内含Linux编程工具包(GUN/Linux Programming Unleashed(Second Edition) Kurt Walla waiting, Zhang translation. Tsinghua University Press. Embedded Linux Programming Toolkit)

模拟Linux文件系统 在任一OS下，建立一个大文件，把它假象成一张盘，在其中实现一个简单的模拟Linux文件系统。自己编写的程序，绝对原创。(failed to translate)

This program is a local area network file transfer function, including progress bar, relatively simple

configs for motorola sumatra board

C Format 从Linux移植过来的，用于C/C++源程序的格式化，支持多种格式化模式。(C Format from the Linux transplant for C/C source code formatting, support for multiple formatting mode.)

这个文档非常经典的介绍了关于嵌入式开发的一些精髓，非常适合初学者(This document is the classic description of some of the essence on embedded development, is very suitable for beginners)