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After reading get_transport (), continue to read the get_protocol () and get_pipes () functions. Still from drivers/usb/storage/usb. c: 672staticintget_protocol (structus_data * us) 673 {674 switch (us- gt; subclass) {675 After reading get_transport (), continue to read the get_protocol () and get_pipes () functions. Still from drivers/usb/storage/
Technorati label: Boot Disk How to Create a USB flash drive and install the system with a USB flash drive (reprinted) Many of my friends are using laptops without optical drives, but the problem also arises. When we need to reinstall the system, there is no optical drive. What should we do? Maybe you can say that the hard disk can be installed under DOS, but how many people will use dos? In fact, not only d
Linux-USB Gadget OverviewThe Linux-USB Gadget driver framework (hereinafter referred to as gadget) provides software functions for devices defined by the USB protocol.Compared with the Linux USB host driver, the gadget driver appears later than 2.4.23.The Gadget Framework proposes a set of standard APIs, which are driv
For the entire USB-storage module, the usb_stor_init () function is its start. However, for the USB flash drive, the function that actually drives the USB flash drive starts with the storage_probe () function. As long as the two parallel lines overlap, it is doomed to start a lifetime of entanglement, no matter whether the middle is a short separation.
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
Come out and try again later. Basically, each directory in the Linux kernel has a Makefile. Makefile and Kconfig are just like a map of a city. a map shows us a city, while Makefile and Kconfig let us know what is under this directory... "Come out and try again sooner or later ." Basically, there is a Makefile under each directory in the Linux kernel. Makefile and Kconfig are like a map of a city. a map leads us to know a city, while Makefile and Kconfig let us know the structure under this dire
USB has become one of the indispensable interfaces of PC, almost all devices can be connected to USB devices, USB keyboard, mouse, printer, camera, and commonly used U disk and so on, starting from this article, will focus on the use of USB devices in Dos method, There will be several temporary difficult to set, write
Install a Linux system to a USB flash drive or a USB flash drive for a linux System Step 1: First insert the usb flash drive to the usb interface of the Computer Host (it is recommended to insert the usb interface to the rear of the hosts box), and then open the UltraISO sof
USB protocol analysis, usb protocol 1. Description structure of USB devices 1. Logical Organizational Structure The logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has one or more configurations. The configuration usually has one or more int
"Come out and try again sooner or later ." Basically, LinuxEach directory in the kernel has a makefile. MakefileAnd kconfigJust like a map of a city, a map leads us to know a city, while makefileAnd kconfigSo that we can understand the structure under this directory. Drivers/USB/storage/Makefile under the DirectoryThe content is as follows: Lfg1:/usr/src/linux-2.6.22/Drivers/USB/storage #Cat makefile # # Ma
1-2 is omited, for more detail please referWww.usb.org. ....... 3 layout guidelines 3.1 General Routing and placementUse the following general routing and placement guidelines when laying out a new design. TheseGuidelines will help to minimize signal quality and EMI problems. The high speed USB validation effortsFocused on a four-layer motherboard where the first layer is a signal layer, the second layer is power,Third layer is ground and the fourth i
With USB3.0 control chip motherboard, although has become the mainstream of the market, but for most users still use USB2.0, USB2.0 file transfer speed also seems to be unable to meet their requirements. In fact, now USB2.0 speed there is room for improvement, we can use the speed-increasing patch to explore the potential of USB2.0. USB 2.0 Why not reach the 60mb/s? We all know that the theoretical bandwidth of
In 1991, one introduced the concept of pipelines in Linux and used pipelines in many places, such as file systems and device drivers. So we can see that there are various pipelines in Linux. But the same thing is that all pipelines are used to transmit things, but some pipelines transmit real material while some pipelines transmit data. The pipe we see in the USB code is used for data transmission and communication. Communication is from both parties
Recently installed in the old machine on the CentOS system, with the Chinese cabbage or ultraiso after making the system disk, the start booting from USB device and boot failed, has been very depressed , thought to be the cause of the system. It's not working on the Internet to say that the Syslinux file is modified or replaced. The final discovery is the format of the U-boot, which does not match the format of the BIOS boot
In 1991, one introduced the concept of pipelines in Linux and used pipelines in many places, such as file systems and device drivers. So we can see that there are various pipelines in Linux. But the same thing is that all pipelines are used to transmit things, but some pipelines transmit real material while some pipelines transmit data. The pipe we see in the USB code is used for data transmission and communication. Communication is from both parties,
This article was reproduced from: http://blog.csdn.net/u013686019/article/details/50165059[HTML]View PlainCopy android:4.4.4 First, the problem analysisWhen the USB printer is plugged into an Android device, there is no printer node (/DEV/USB/LP0) generated in the System/dev directory.The first reaction is to check the printer device and access the Ubuntu-equipped PC, normal: /dev/
Android USB Connections Explained:mtp, PTP, and USB Mass StorageOlder Android devices support USB mass storage for transferring files back and forth with a computer. Modern Android devices use the MTP or PTP protocols-you can choose which one prefer.To select a USB connection protocol, open the Settings app, tap Storag
USB device is a collection of ports, interfaces, configurations, USB protocol is a variety of USB descriptors to characterize the function of USB devices. The computer uses these descriptors to obtain the functionality of the USB device.USB descriptors include:
Recently, as a result of the business relationship, we need to install an HP Server that was originally installed with win2003 into a red hat linux6.1. I thought it was a simple task. I ran into the data center with a CD. As a result, I was stunned. No one of the three DVDs was available, and all of them showed medium damage. (Mei's) it's troublesome now. Think that windows can be installed from a USB flash drive, so linux should be fine. The preparat
Disable usb in Domain Policy and usb in Domain Policy Documents and templates can be downloaded in http://pan.baidu.com/s/1qYTcjTy Pro_usb_users.adm this template can be disabled to the specified drive letter, for user policy Pro_usb_computers.adm this template is intended for computers. Generally, it is enough. You can start from three aspects In fact, the adm configuration file seems to have modified th
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