teleconference device

"Problem description"When you make a manual backup of system management, you are prompted to "fail to open Backup device" E:\ automatic backup \ufidau8xtmp\ufdata. BAK '. An error occurred on the device or the device is offline. For more information, see the SQL Server error log. -2147217900 "Then click "OK" will prompt a suggestion "1, check the hint path of the

A new device driver model-platform (platform) device driver, platform device driver (platform_device) and platform driver (Platform_driver) is introduced into the Linux2.6 kernel, The introduction of platform devices makes Linux device drivers more portable.First, platform equipmentPlatform

Loaded from http://blog.csdn.net/sjwangjinbao/article/details/6077225When writing a bus device driver, it was found that the struct device in the 2.6.33.2 kernel had no members of BUS_ID, and the const char *init_name member was found. However, this member cannot be used directly to set and read the device name.The method for kernel operation is dev_name and Dev_

1, after the system plugged into the USB device, from the console interface has the following prompt:From the console information, you can see the inserted USB device name.As you can see, the plugged-in USB device is sde4.However, if the CRT tool is remotely connected to the past, you can use the following command to view the USB

===============================This article is the original site, welcome to reprint!Reprint please indicate the source: http://www.cnblogs.com/gdt-a20 =============================== The kernel developer will be the bus, device, drive the three are abstracted from the software idea, cleverly established the relationship between the two, make it more visualization. Combined with the knowledge that we have learned before, in general, the relationship b

MSDN Original:https://msdn.microsoft.com/zh-cn/library/windows/hardware/ff554721 (v=vs.85). aspxIn Windows, a device is represented by a device node in the Plug and Play (PnP) device tree. Typically, when you send an I/O request to a device, some drivers help handle the request. Each of these drivers is associated with

From one point of view, the role of a device driver is to provide a mechanism, not a policy.When writing drivers, the program ape should pay particular attention to the following basic concept: When writing kernel code to access hardware, do not impose any specific policy on the user. Because different users have different needs, the driver should handle the problem of how to make the hardware available. And the problem of how to use hardware is left

Tags: logout flags function device fun argv hrd none lapThe code is as follows#include #include#include#include#include#includeintDemo_major = -;intDemo_minor =0;intDemo_count =1;structCdev Cdev;Static struct class*Demo_class;Static structDevice *Demo_device;intDemo_open (structInode *INODEP,structFile * Filep)//turn on the device{PRINTK ("%s,%d\n", __func__, __line__); return 0;}intDemo_release (structInod

See Dr. Zhao Jiong's "Linux 0.11 source code comment" has been two or three weeks, starting from today, some personal summary and sentiment sub-standard inscribed out, chat for memory for later review.In the/linux/boot/bootsect.s of linux0.11 source code, there is a label definition Root_dev! Root_dev:0x000-same type of floppy as boot.! 0x301-first partition on First drive etcRoot_dev = 0x306Here, Root_dev is the device number of the system-specified

first, the Linux system divides the device into 3 categories: Character device, block device, network device. Using drivers:1, character device : Refers to a byte can only one byte read and write devices, can not randomly read the device