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, if the packet traffic is high, excessive interruptions will increase the system load.
Round Robin
If the polling method is used, you do not need to enable the interruption status of the network device or register the interrupt handler. The operating system will enable a task to regularly check the BD table. If the current Pointer Points to the BD not idle, the data corresponding to the BD will be retrieved and the BD will be restored to its idle state.
Because the principle of regular task che
The popularity of Microsoft Windows 7 won't squeeze out Linux, Which is unquestionable. If you are a Linux user, you want to learn more. If you encounter Linux driver development problems, here we will introduce the necessary steps for L
from USR mode; x86 processor contains 4 different privilege levels (0-3), Linux user code runs at privileged Level 3, system kernel runs at privileged level 0Linux can only complete control transitions from user space to kernel space through system calls or hardware interrupts.Kernel Compilation and loadingTo add a program to the Linux kernel, you need to complete the following 3 tasks:Add the code to the
Author: (printed) Sreekrishnan Venkateswaran [Translator's introduction]Translator: Song Baohua; he zhaoran; Shi Haibin; Wu guocheng [same translator's work]Series name: Turing programming SeriesPress: People's post and telecommunications PressISBN: 9787115221674Mounting time:Published on: February 1, March 2010Start: 16Page number: 1Version: 1-1Category: Computer> operating system> Linux
IntroductionThis book
, in "the further study of C", write C program try to use Makefile control compile results can 4. Shell's learning shell is an automated script, can be seen as a collection of commands, in the development of the drive everywhere, the work before the need to know too deep, in the look at the brothers even Linux video tutorials and bird brother's Linux private dish
I rely on it, this is really a tough guy (first ROAR ). No one told me that I had to build an environment for driver development. With the book "Linux Device Driver", I was blinded at the beginning. Really! I don't know if I have to build a kernel tree. I wonder if the
1, embedded development environment to buildThe porting of Telnet on the mini2440The transplant of Opencv-2.4.9 on the mini2440Build an embedded development environment summary2. Linux Device driverLinux Driver header FileA step-by-step study of Linux
I. Overview
Developing Drivers Based on subsystems is a common practice in Linux kernel. I have previously written about driver development based on the I2C subsystem. This article introduces another common bus SPI development method. The development of the SPI subsystem has
http://blog.csdn.net/zqixiao_09/article/details/50888795
We have learned the theoretical knowledge of platform devices in front of Linux device driver development--platform device driver, the following will be an example to delve into our learning.
first, the platform driven work process
Platform model-driven program
Tags: development module compilation interval ASE driver development statically compiled man linkLinux Gpio keyboard Driver development record _omapl138Linux basic configuration is complete, these days began to start the development
Http://blog.chinaunix.net/uid-22174347-id-1786939.html
Embedded Linux in my line, mainly narrated and summed up in my study of embedded Linux in each step. One for summing up experience, two want to be able to get into embedded Linux friends to provide convenience. If there is any mistake, please correct me. Share resources, Welcome to reprint: http://hbhuangga
First, open the road of driving development1, the preparation of driving development(1) The Development Board of the normal running Linux system. The zimage of Linux in the Development Board must be compiled by itself and not compiled by others. The reason is that security c
Nbsp; 1. learn to write simple makefile2. compile an application and run it with makefile. learn to write the driver makefile4. write a simple char driver. The makefile is compiled and can be insmod, lsmod, or rmmod. print helloworld in the init function of the driver.
1. learn to write simple makefile2. Compile an application and run it with makefile.3. learn to
This article is mainly to a simple LED-driven development process, to spy on the Linux driver development.
Basic process:
1. Write driver files xxxx.c
The main purpose of this file is to initialize the device hardware, mainly Xxx_init (), which also includes the registration
after her mission is basically completed, then she gave Urb to whom? This is the previously mentioned USB controller driver, host.As for host, there are a lot of money on the market now, and if your boss gives you the most mature image of EHCI, you're lucky. This basic does not need you to write, as long as a little modification, to register her on the bus can. If you are unfortunate enough to use a host like MUSB, you are miserable and you have suff
Source: Ji yiqin blog Author: Ji yiqin
I first came into contact with Linux driver development and bought a "Linux Device Driver". The first thing is to build a development environment !!!
There is a hello World column on it:
//
Five years after running the vxworks driver, I was eager to switch to Linux kernel development. I would like to hear your comments and recommendation companies! -- Linux general technology-Linux programming and kernel information. The following is a detailed description. I h
driver for the handle and buttons, in order to be happy in the future, haha.Libusb is a user-side driver encapsulation library and a set of functions used by USB hosts to operate USB devices. With libusb, we do not need to modify the complicated Linux kernel driver for a certain type of USB device, this facilitates th
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