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Linux character device driver learning notes (1): simple character Device Driver

Recently, I have been drum up the lnux character device driver. I have collected various code and comments about the linux device driver on the internet, either for 2.4 or errors, and I cannot run it successfully, I really hope that you can carefully check the correctness of the code when posting a blog. In particular, you must list the code runtime environment and dependency conditions. Otherwise, it will

How do I uninstall the Wireless NIC driver? Tutorial on detaching a Wireless NIC driver

Method One: 1, in order to WIN8/8.1/10 we just in the computer keyboard Windows logo key +x key, and then click on the Open menu "program and Function", the following figure: 2, then we find the interface to click the Uninstall wireless network card driver, and then right-click the "Uninstall", follow the on-screen prompts to complete the uninstall. Different wireless network names will not be the same, we search for their own wi

Linux Camera Driver Learning: (iv) uvc-camera driver Framework Analysis

Uvc:usb Video ClassUVC Drive: drivers\media\video\uvc\UVC_DRIVER.C Analysis:1. Usb_register (uvc_driver.driver);2. Uvc_probeUvc_register_videoVdev = Video_device_alloc ();Vdev->fops = uvc_fops;Video_register_deviceDownload the UVC specification in www.usb.org,UVC 1.5 Class specification.pdf: Detailed descriptionUsb_video_example 1.5.pdf: There are examplesControlled by Videocontrol interface,Videostreaming interface to read video data,VC contains a number of unit/terminal and other functional mo

Java.sql.SQLException: [MICROSOFT][ODBC Driver Manager] did not discover the data source name and did not specify a default driver workaround

The development program requires a login function. You don't want to use a big database. Connect to access directly with Java. Everything is OK on your machine, and there is no problem with URL direct connection and configuration data source. Published to Windows server2008, the data connection is not available. The system is 64-bit. Office is 2010 32-bit. The problem has been looking for half a day. Finally resolved:32 for access driver needs t

[Microsoft] [ODBC Driver Manager] in the specified DSN, the architecture between the driver and the application does not match

This problem occurs when you use ASP to connect to the MySQL database.One afternoon, it was an ODBC data source problem.Record it:Cause of error: The 64-bit system uses 32-bit ODBC.Workaround: Use 64-bit ODBC for no problem.32-bit ODBC in the location: C:\Windows\System32\odbcad32.exe64-bit ODBC in the location: C:\Windows\SysWOW64\odbcad32.exe(The directory may differ for different systems)A problem also occurs during the connection process:[MySQL] [ODBC 5.3 (a)

[Linux Driver] character device driver learning Note (i)

One, what does the main device number and the secondary device number mean? Linu kernel is if the main device number to find the driver, the secondary device number to find the device.A: Usually a main device number represents a driver, for example, in a block device, a master device number represents a EMMC device, the different secondary device number represents a different partitionThe Linux kernel allow

Overview of Linux driver framework and driver loading

Article title: describes the driver framework and driver loading in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. This section describes the Linux device driver framework, driver

Write a plug-in driver for online games (I)-anti-plug-in Driver

. B)You can either directly send a keyboard, mouse, or other message to the game process by determining that obstacles, monsters, and other things on the map have crossed the map. Of course, killing monsters is done by simulating buttons. However, with the destructive impact of plug-ins on the game, anti-plug-ins and plug-ins have been entangled in the kernel layer, such: 1,To prevent external callsWindowsA series of key systemsAPI(For exampleOpenProcess,Read/writevirtualmemoryAnd so on)

Ye fan's brother's first wince driver-fakegps driver

The wince application was started two years ago. However, due to division of labor, there has never been a chance to gain a deep understanding of the development of the wince Driver (including Pb-related system customization ). If it weren't for the fakegps development work that was scheduled by Ma Ning some time ago, I really don't know when to understand the wince driver development. Fakegps is a disguise

Learn how to develop a Linux driver. 03-led character device driver for ok6410 Series

In the previous article, we introduced the framework of the character device driver. In this article, we will operate on the real hardware-led. Author: canghai hunter Source: http://blog.csdn.net/embedded_hunter reproduced please indicate the source of embedded technology exchange QQ group: 179012822 I. experiment environment Development machine environment Operating System: Ubuntu 9.10 Cross-compiling environment: Arm-Linux-GCC 4.2.2, installation l

Implementation and test of the simplest character device driver in ldd3 Linux Device Driver

The source code is as follows: #include The test code is as follows: /************************************************************************* *fileName: test.c *description: test the myscull.c *author: Hzc *create time: 2007-04-20 *modify info: -*************************************************************************/#include The driver loading script is as follows: #!/bin/shinsmod scull.komknod /dev/sculldev c 252 0 The

Arm driver advanced: Compile the driver for the input subsystem

To compile the driver for the input subsystem: Driver code implementation:Buttons. c /* Refer to drivers \ input \ keyboard \ gpio_keys.c */# include

Android DRIVER: android driver

Android DRIVER: android driver 1 SensorManager mSensorManager = (SensorManager) getSystemService (SENSOR_SERVICE ); Step 2: Use the getdefasensensor method of SensorManager to obtain the sensor Object of the specified type; 1 Sensor sensor = mSensorManager. getdefasensensor (Sensor. TYPE_GRAVITY); // gravity sensing Step 3: implement the onSensorChanged and onAccuracyChanged methods of the SensorEventListen

Solve the problem that '[Microsoft] [ODBC driver manager] does not find the data source name and no default driver is specified'

View the file *. Reg created in the system DSN (my name is datasource. Reg) with the following content: Windows Registry Editor Version 5.00[HKEY_LOCAL_MACHINE/Software/ODBC. INI/javadatasource]"Driver" = "C: // windows // system32 // sqlsrv32.dll""Server" = ".""Database" = "manager""Lastuser" = "Administrator""Trusted_connection" = "yes" My data source name is javadatasourceThe database name is Manager. Note: The data source is inHKEY_LOCAL_MACHIN

Thinkphp3.2Couchbase distributed cache driver and distributed session driver

Thinkphp3.2Couchbase distributed cache driver and distributed session driver Couchbase Server (formerly Membase) is a distributed document-oriented NoSQL database management system that integrates CouchDB's simplicity and reliability, Memcached's high performance, and Membase's scalability.Replace Memcached. when the cache is the best and does not have one, it can be persisted.

Reader pcsc driver error! You must reinstall reader driver! Solution

Reader pcsc driver error! You must reinstall reader driver! Solution Solution in DOS status: After entering dos, type the following command:1. SCardSvr reinstall2. regsvr32 scardssp. dll (with spaces in the middle. Return to the window system and restart the service. The default value is manual. Then, click Start .) If you still cannot import IC card information using the doscommand, reinstall the operat

Uninstall the atigraphics card driver in Ubuntu and restore the open source driver.

Uninstall the atigraphics card driver in Ubuntu and restore the open source driver. First, uninstall the installed atigraphics card driver:CD/usr/share/ATI/Sudo./fglrx-uninstall.sh Then execute the followingCode:Sudo apt-Get remove -- purge fglrx *Sudo apt-Get remove -- purge xserver-Xorg-video-ATI xserver-Xorg-video-radeonSudo apt-Get install xserver-Xorg-video-ATISudo apt-Get install -- reinstall libgl1

Winform uses the driver registration ID to check whether the driver is installed.

Winform uses the driver registration ID to check whether the driver is installed. 1 public bool IsRegistered () 2 {3 string clsid = ConfigurationManager. receivettings ["clsid"]; 4 // check the parameter 5 Debug. Assert (! String. isNullOrEmpty (clsid), "clsid should not be blank"); 6 // set return value 7 bool result = false; 8 // check method, check whether the Registry has the specified clsid 9 string k

Linux Driver Development (iii) character device driver framework

(Demo_init); Module_exit (Demo_exit); Module_author ("libra13179"); Module_license ("GPL v2");MakefileVERS = $ (Shell uname-R) # Kernel Modulesobj-M + = for the module compilation. #EXTRA_CFLAGS /c3>=-g-o0build:kernel_moduleskernel_modules: -c/lib/modules/$ (kvers)/build m=$ (CURDIR) Modulesclean: -c/lib/modules/$ (kvers)/build m=$ (CURDIR) CleanMake TestUse the DMESG directive to viewUse Cat/proc/devices to see demo informationNow mainly introduces the use of DEMO.C in functions and macr

Linux Driver Development Second-step driver module Transfer (Module_param function use)

Tags: parameter usr author the development Linux drive MPI build modDeclare the parameter names, types, and permissions you want to pass in the driver's module.Module_param (name, type, permission) of the variable;The first example#include #includeStatic Char*p_name ="USR"; Module_param (P_name, Charp, S_irugo); Module_parm_desc (P_name,"This is a char * string.");Static int__init Hi_init (void) {PRINTK (Kern_info"Hi Enter%s\n", P_name); return 0;} Module_init (hi_init);Static void__exit Hi_exit

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