install device driver

Before we introduced how to implement a simple character device driver. The basic functions provided by the simple open,close,read,write and other drivers are introduced. But a real device driver often provides more advanced functionality than simple read and write.In this article we will introduce some of the advanced

Bkjia.com exclusive Article] preface introduces the concepts involved in this article: 1) snull:Is a virtual network model that can be used to understand the operation of the driver of a real physical network interface device. 2)The code in this article isStandard C LanguageFormat. 3) * skb:The important pointer volume points to a memory area to buffer incoming and outgoing network packets to be processed.

Seven: I2C Dev node operation now to analyze the above structural diagram of the i2c-dev.c in part. this section provides an adapter operation interface for the user space. this part of the code is actually a module. its initialization function is: module_init (i2c_dev_init); The i2c_dev_init () code is as follows: static int _ init i2c_dev_init (void) {int res; printk (kern_info "I2C/dev entries driver/N"); Res = register_chrdev (i2c_major, "I2C", i

TLV, which is the meaning of Type-lenght-value, the No. 0 element of the array represents the type of data, the 1th element represents the length of the data, the third element and the subsequent element hold the variable's data.Establishment of control devicesThe control device, like the PCM device, belongs to the logical device under the sound card. The applic

Install the tp-link WN821N driver and centoswn821n driver on centos1. First, check the usb driver type. $ lsusbBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubBus 002 Device 001: ID 1d6b:0002 Linux Foundatio

USB device, which is the external device of our Win7 64-bit flagship download system, this kind of equipment in fact our daily operation is very frequent, such as our U disk, mobile hard disk, external optical drive, as well as printers and so on, these are the USB devices, but also our daily operations more frequent equipment. Generally speaking, we use USB devices in the Win7 flagship computer is very sim

Advantages and disadvantages of Linux Device Driver dynamic kernel insertion and direct integration into the Kernel Analysis Introduction: The company made a Linux-based Ethernet interface board, which is currently maintained by me, the main CPU of this Board uses PowerPC, run the Linux system and add two external DPRAM modules. DPRAM is written in the form of a character

In order to learn the driver of character devices, we have to understand some related structures... So, open the kernel through Source Insight... I browsed important driver structures. * User-driver relationship: user space read, write, etc. ---> linux System Call ---> indirectly call the functions in the file_operations structure of the

How to install the driver in Win8.1 can solve problems such as virtual serial port installation and VMware bridge driver installation ., Win8.1vmwareA virtual machine is installed in win8.1, but there is no virtual network card vmnet0 vmnet1 vmnet8?The network cannot be changed to the bridging status: Is there no host network adapter Without bridging?In win8.1, h

Document directory Contents Driver Contents Driver I/O port From smth Basic Structure Driver Implementation PCI Loopback SIS 1, 900 Implementation of ISA bus DMA Driver Linux supports three types of hardware: char