Sometimes we need to modify device tree to adjust functions of the board. For example: switch M2 slot function between SATA/PCIE, change CAN clock rate, etc. This tutorial will teach you how to find the right device tree file and some notes about modifying it. 1.1. Find the Device Tree...
1.2Device Tree Structure and Properties 1.3Modifying an Existing Device Tree 1.4Pin MultiplexingA PDF version of this Lesson as well as the entire OSD335x Design Tutorial can be downloaded here.Notice The information provided within this document is for informational use only. Octavo Systems pr...
For simplicity, this brief tutorial will only cover type char devices loaded as modules. Kernel 2.6.x will be used (in particular, kernel 2.6.8 under Debian Sarge, which is now Debian Stable). User space and kernel space When you write device drivers, it’s important to make the ...
If you want to add code to the Linux kernel, the first thing you need to do is to add some source files to the kernel source tree. There may be situations where you are required to add code to the kernels while it is running, this process is called a loadable kernel module. The be...
For Emacs, use the online tutorial: Start Emacs, press CTRL-H, and then type T. Or read GNU Emacs Manual (Free Software Foundation, 2011). 《学习vi和Vim编辑器:Unix文本处理,第7版》(O'Reilly,2008)可以告诉你关于vi的一切。 对于Emacs,可以使用在线教程:启动Emacs,按下CTRL-H,然后输入T。
perf利用Linux的trace特性,可以用于实时跟踪,统计event计数(perf stat);或者使用采样(perf record),报告(perf report|script|annotate)的使用方式进行诊断。 perf命令行接口并不能利用所有的Linux trace特性,有些trace需要通过ftrace接口得到。 参考https://github.com/brendangregg/perf-tools ...
vi /etc/sysconfig/network,修改HOSTNAME一行为"HOSTNAME=主机名"(没有这行?那就添加这一行吧),然后运行命令" hostname 主机名"。一般还要修改/etc/hosts文件中的主机名。这样,无论你是否重启,主机名都修改成功。 0002Ret Hat Linux启动到文字界面(不启动xwindow)(bjchenxu) ...
31. Ytree Ytreeis a simple, fast, and easy-to-use curses-based file manager similar to DOS Xtree, which is effective for browsing filesystems and archives in Linux. Ytree File Manager 32. Clifm – Fast File Manager Clifmis a unique, lightning-fast command-line file manager that operate...
Device Name Subsystem子系统 Kernel driver内核驱动 Kernel module内核模块 LEARN MORE What Is Unix? 了解更多什么是Unix? (List PCI Devices In Tree Format) Up to now, we have listed PCI Devices in a line by line or regular format. We can also list the output of thelspciin a tree format wit...
ps、pstree 当进行系统分析时,ps命令和pstree命令是最基本的常用命令。ps显示有关选择的活跃进程的信息。ps命令提供当前已存在进程的列表。top命令动态显示进程信息,但是ps命令可以以静态方式提供更详细的信息。 ps可以使用3种不同类型的命令选项: □ UNIX选项,可以组合起来,必须在前面加一个连字符“-”。