There are a lot of readily available information about USB. I will summarize some of the basic information here.
I. Advantages of USB
(1) easy to use. Supports hot swapping.
(2) wide application scope. The USB system has less additional information and high bandwidth utilization. Both synchronous transmission and asynchronous transmission are supported.
(3)
Now we are using more and more USB devices, and there are no fewer problems, software hardware aspects of the problem, then we analyze the USB device and troubleshoot. 1. Front usb cable Connection error. This type of failure occurs when the USB cable on the motherboard corresponds to the front
Ubuntu 7.04 installed on IBM T40 has been upgraded to the latest version in the new version.After the USB flash drive is inserted, the system does not respond.# LsusbYou cannot see any device information. If you insert a USB mouse, you can identify it and use it normally.I have installed Ubuntu on a desktop computer and a Compaq notebook before, and can recognize the US
USB flash drives, a mobile storage device, provide great convenience for people to store data due to its advantages such as small size, large capacity, and easy to carry. But thanks to this convenience, the virus also has a chance to take advantage of it. Have you ever taken a USB flash drive to print a photo outside and used it again, what happens when I find my computer poisoned?
The
USB flash drive cracking XP Administrator Password
Method 1
In fact, cracking windows passwords is also very simple. To do this, you must first sharpen the tool. To crack the XP login password, we need to use the "ERD Commander 2003" (ERD) software, which is generally built into the winpe and other system recovery discs. However, the disk is too large to carry, and the Compact USB flash disk is our best
For system integration engineers, it may be necessary to install systems such as Windows operating systems, VMware ESXi, etc. frequently.For me, I often install Windows operating systems, VMware ESXi. Because of the different needs of users, the installed system and version are also different. I used to take several U-disk, now still with several U disk (this is the superiority of Chinese language, this U disk is not a U disk). But now with the USB fl
Three methods to create a lightweight and persistent Xubuntu Linux USB System DiskUse Universal USB Install to create a persistent USB XUbuntu System Disk
This tutorial describes how to use Xubuntu Linux to create a lightweight and persistent Linux USB system disk.
Note: Persistent Linux
Look at the USB drive is the device, and then mount-t vfat/dev/to find the disk/your directory
One
Linux is not like Windows, after the new hardware can be automatically recognized, in Linux cannot automatically identify new hardware, need to manually identify. USB Mobile storage devices are usually identified as SDA1, which can be queried by fdisk-l command.
Before using a U disk, we have to create a new s
How to implement USB Mass Storage drive under LinuxVersion:v0.7How to Write Linux USB MSC (Mass Storage Class) Drivercrifan Li SummaryThis paper mainly introduces the relationship between the various protocols of USB Mass storage, and how to implement USB drive under the Linux driver framework.
This
Linux2.6 kernel USB Gadget drive porting
Before writing a little bit of the knowledge of USB slave end
In the kernel 2.4 version, the embedded USB drive is in the Kernel/arch/arm directory ep0.c ep**.c, when debugging USB driver is difficult, mainly if the addition of too much PRINTK, will affect the timing of
Original URL: http://mb.it168.com/a2012/0816/1385/000001385641_all.shtml"IT168 Application" now, more and more computers are already popular USB 3.0 interface, the new laptop, the newly installed desktop, you can find this is not the same as the past 2.0 times the blue USB interface. So, the same is to charge the phone, USB 3.0 and the traditional
Intel motherboard USB 3.0 XHCI controller port configuration, 3.0 xhci
Generally, Intel has two EHCI and one XHCI on the motherboard that supports USB 3.0 host controllers. This type of motherboard generally has 14 ports, and port 0-3 is shared by EHCI and XHCI, that is, port 0-3 has four switches, and the control registers of these four switches are located in the xhci pci (PCI-E) configuration space, the
The USB flash drive folder name is changed to the following situation: Why? Objects or @ are different and cannot be deleted. When deleting a file, the system prompts that the file cannot be deleted and the source file or disk cannot be read. Note that most of the garbled files are very large, even dozens of GB.
The cause of this problem is usually caused by abnormal insertion and removal, which leads to confusion in the file allocation table of the
This idea has been in the head before, recently the company's products to use, so more to do some understanding.1. Introduction to USBUSB is Universal Serial bus abbreviation, literally, is the meaning of universal serial bus. Physically, it is a pair of differential lines, connected to two devices, data transmission between each other. With the other two power supplies (5V and GND), there are altogether 4 lines.So, since there is only a pair of differential lines, then how to decide who to pass
USB deviceWhen we mention it, we will think of it as a USB drive or USB data cable.However, the current USB manufacturer has changed the USB design mode and has been converted into some more useful and creative devices. You never thought of a transformer as a
USB bus leads to two important linked lists! A usb bus leads to two important linked lists: A linked list of USB devices and a linked list of USB drivers. The device linked list contains USB devices in various systems and all interfaces of these devices. The driver linked li
Android USB Development Trouble is still more.First Type: Host modeThis mode is good, powered by an Android device, and then communicates with the external device. For example: A computer connected to a USB device is a very common mode of this mode.But there is a vicious question, what happens when Android is connected to an external USB device? There is also the
Document directory
A quick tour of the hardware
The various modules and their interrelations
How URBS keep it all together
Input Handling
Even though UNIX traditionally considers a device as either a "char device" or a "Block device" (as outlined by the 'C' or 'B' in their/DevEntry points), new classes of device are being introduced as technology advances. One of such classes is that of ''usb devices ''.
An
USBDescriptor
The USB descriptor information is stored in the USB device. During the enumeration process, the USB Host sends a getdescriptor request to the USB device. After receiving the request, the USB descriptor information is returned to the
Linux USBDevice Driver Framework Analysis
In fact, all the device drivers in Linux follow the same Convention-representing the structure of the driver program (which is more appropriate with the driver, it should be called a better driver, the struct should contain all the resources required by the driver. In terms of terms, it is the attributes and members of the drive object. Since the Linux kernel is written in C, We also analyze the code according to this structured idea, but I still want to
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