cisco drivers

This article is done original, reproduced please specify the source, respect for the original.Writing this article, I refer to some blogs on the Internet:Http://bbs.chinaunix.net/thread-3634524-1-1.htmlHttp://www.bkjia.com/gjrj/800182.htmlAlso refer to the "Linux driver development in detail" 3.4 chapters, to achieve the establishment of their own drive directory.The driving example in this article is: Linux device Driver Development detailed second edition of global Mem Tow, Song Baohua Editor'

Make [2]: *** no rule to make target 'drivers/Char/tianc_ LCD .o ', needed by 'drivers/Char/built-in.o'. Stop. Make [2]: *** no rule to make target 'drivers/Char/tianc_ LCD .o ', needed by 'drivers/Char/built-in.o'. Stop. Make [1]: *** [Drivers/Char] Error 2 Make: *** [

Control program.In addition, routing and address resolution are handled by the kernel. Loadable Modules The features provided by the Linux kernel can be extended at run time, that is, when the system is up and running, we can add or remove functionality from the kernel to the kernel.Code that can be added to the kernel at run time is called a "module."The Linux kernel supports several types of modules, including but not limited to device drivers.Each module consists of target code

How to use the device tree of linux drivers and how to use the device tree of linux drivers The Device Tree describes the hardware from the software perspective, and DTS is the Device Tree source file. DTC is responsible for converting DTS to DTB, and DTB is the binary form of DTS for machine use. The Device Tree is a tree structure. Each child node except the root node has a unique parent node, which can h

This is a 2014kdd, geographic location service paper. Contents: 1) First, the author raised a valuable Question: recommend taxi drivers with routes that can be carried to the guests at the minimum cost. 2) Secondly, the novelty of the problem is that in the past, there were scattered recommendation points. This paper is a recommendation route. It can be said that the location service provided goes further. 3) then, two sub-problems are pointed out: a)

The stream device driver is actually the driver for exporting standard stream interface functions. This is the definition above. In wince, all stream devices export stream device interfaces, so that Device Manager in wince can load and manage these stream device drivers. Architecture of stream device driver First, I declare that I copied this image. When wincestarts, oal(oal.exe) First loads the kernel. DLL, and then kernel. DLL load device. DLL, devi

your current running kernel version.uname -rTells us the kernel version number: alan@hactar:~$ uname -r2.6.15-23-686 Using that information we can (in Ubuntu and other Debian based distributions) easily download the kernel headers with a command like this: alan@hactar:~$ sudo apt-get install linux-headers-`uname -r`Reading package lists... DoneBuilding dependency tree... Donelinux-headers-2.6.15-23-686 is already the newest version.0 upgraded, 0 newly installed, 0 to remove and 66 not upgraded.

device in the private_data member that represents the opened file pointer filp for other operation functions. Release Operation: int yjpLED_release(struct inode *inode, struct file *filp){filp->private_data = NULL;return 0;} Release the content allocated by open in filp-> private_data. Write operation: ssize_t yjpLED_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos){ssize_t retval;struct yjpLED *dev;dev = filp->private_data;if(down_interruptible(dev->sem))return -ERE

Poll for linux drivers and poll for linux driversPOLL operations 1. POLL execution process: Poll is a system call. Its kernel entry function is sys_poll. sys_poll calls do_sys_poll directly without any processing. The execution process of do_sys_poll can be divided into three parts: 1. Copy the input pollfd array to the kernel space. Because the copy operation is related to the array length, this is an O (n) operation, in do_sys_poll, the code in this

This document describes how to use ctl_code to communicate with a Windows NT driver. generally, user-Mode Applications can communicate with kernel-mode drivers by calling createfile and deviceiocontrol, if a driver in the kernel state wants to perform similar operations with another driver, how can this problem be achieved? Next, we will provide a detailed description. The main idea is to first get the handle of another driver, then construct an IRP,

Half a year five acquisitions Cisco intensive integration for self-redemptionWu MicroCisco, a "takeover guru", recently announced a new deal.The acquisition was Cloudlock, a cloud security company, with a total transaction price of $293 million. This is the fifth takeover deal that Cisco has launched this year.As the world's largest network equipment manufacturer, Cisco