Device number:1, self-allocation of the initiativeMajor = Register_chrdev (0, "First_drv", first_sdv_fops);//RegisterWhen you register your device with the device number 0, the kernel will voluntarily assign a master device number to return.2. Manual designationFind the main device
/*======================================================================
A Globalmem Driver As an example of char device drivers
There are two same globalmems in this driver
This example was to introduce the function of File->private_data
The initial developer of the original code is Baohua Song
======================================================================*/
#include #include #include #include #include #include #include #include #include #in
If you have multiple Android devices (including Android emulators) connected to your PC, you will need to use the Adb-s DeviceID shell when you enter the console. More trouble, this article has written a shell script file (need to be used under Linux or OS X, Windows needs to be newly written with bat or cmd).The basic idea is to use the ADB devices command to scan how many Android devices are connected to the PC, then intercept the device name from t
the unprecedented security threat.
There are two security threats to IP network, one is the security of host (including user host and application server), and the other is the security of network itself (mainly network equipment, including routers, switches, etc.). The security threat perceived by a user host is primarily an attack on a particular operating system (primarily a Windows system), known as a virus. Network devices are mainly faced with the attack based on TCP/IP protocol. This pap
Original blog member Wosiyin reflect, using WIN2008, right-click through my Computer to access Device Manager prompt: Because you run Device Manager on a remote computer, Device Manager runs in read-only mode. To uninstall a device or change device properties or drivers, you
Notes for compiling Linux network drivers
3.1 interrupt sharing
In Linux, several devices run to share the same interrupt. If you need to share, specify the sharing method when applying. Definition of system-provided request_irq () call:
Int request_irq (unsigned int IRQ,Void (* Handler) (int irq, void * dev_id, struct pt_regs * regs ),Unsigned long flags,Const char * devname,Void * dev_id );
If the sharing is interrupted, flags sets the sa_shirq attribute so that other devices can apply for t
Bitmap has two types: Device-related Bitmap (DDB) and device-independent Bitmap (DIB ). DDB bitmap is common in earlier Windows systems (before Windows 3.0). In fact, it is unique. However, with the development of the display manufacturing technology and the diversity of display devices, some inherent problems of DDB bitmap began to emerge. functions such as bitblt () are based on DDB bitmap. For example, i
How do I read the device number of a usb device? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. I made a usb driver (based on the usb Kernel code of course) and wanted to use a usb device to test whether data can be transmitted. But the device Number of th
Reprinted please indicate the source:Http://blog.csdn.net/lihaoweiVLi haowei's csdn blog
Why did you encounter wait for device when you use fastboot to brush the machine?
I met. I have searched for countless methods on the Internet. I have told you that the driver is not correctly installed, ADB is not deleted, and I have tried none.
If the driver is not correctly installed, I have also tried it on Linux, and there is no need to install the d
Character device driversAn application is a function called open Read write in a C library. In order to operate the hardware, the driver module is introduced.Build a simple drive that has a few steps.1. Create File_operations2. Request a device number3. Registering character device drivers,4. Drive entry5. Drive exitCheck that the data is coming in a way:1. Query
At the time of CentOS 5, we were accustomed to eth0 such a network device naming, in CentOS 6, found that the network device became EM1 name. At that time, when we were installing, we added biosdevname=0 to the startup parameters and we could continue to use the name eth0.
By the time the CentOS 7, the original parameter biosdevname=0 did not work, the network device
During the project development, we need a USB-to-relay device to control the wireless transmitter device when the switch is enabled. When purchasing the device, the sourcing department buys a batch of devices without knowing the operating environment of the relay device, later, we found that the
1, the system under the same time hold down the keyboard "Windows" and "X" key to open the System menu, select "Device Manager." See figure below
2, Device Manager to select the device to uninstall the double-click, pop-up Drop-down menu will appear to uninstall the driver. Right-click "Uninstall" on the selected
1, the system under the same time hold down the keyboard "Windows" and "X" key to open the System menu, select "Device Manager." See figure below
2, Device Manager to select the device to uninstall the double-click, pop-up Drop-down menu will appear to uninstall the driver. Right-click "Uninstall" on the selected
/** * Author:hasen * Reference: Linux device Driver Development Details * Introduction: Android Small rookie Linux * device Driver Development Learning Journey * Topic: device drivers that support polling operations * DATE:2014-11-07 */
In
Globalfifo's poll () function, the r_wait and w_wait wait queue headers in the
Obtain the serial device name. Obtain the hardware name in the Device Manager.
Introduction: In a serial communication program, if multiple serial ports are connected at the same time on the PC, it is difficult to know which serial port is used when the serial port is opened from the application program, in this case, you must use the Device Manager to view the s
Excerpt from: http://www.mamicode.com/info-detail-1165460.htmlDevice identificationWith regard to equipment identification, there have been many heroes in history, such as Udid, MAC address, Openudid, and so on, but they all continued to fall under the apple door. Apple currently offers 2 ways for apps to get the device ID: IDFA and IDFVIDFA: Full name advertisingIdentifier , official explanation is advertising logo, applicable to advertising promotio
The device drivers after linux2.6 are built based on the device model. Therefore, you need to understand the device model for writing the device drivers in Linux, such as USB devices and PCI devices.
The basic structure of the device model is kobject and kset:
Struct kobject
Http://www.pluralsight.com/blogs/jimw/archive/2006/09/11/37653.aspxMore on device app install- installing a windows mobile device application from a desktop MSI following my post a few weeks ago adapt your app resources and references I 've got Ed a few questions on taking the application installation to the next step. you may recall that in that post, there was a sample of how to make a Windows Mobile Appl
Console is on a serial deviceNo further output will appear on this output deviceOn the screen, the black screen shows that the console is on a serial device no further output will appear on this output device keyboard and mouse does not respond. Telnet connection should be OK, this problem was discovered when I used KVM again after I used Telnet. What is the problem? By the way, many Telnet connections are
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