usb ptp

I do not know the USB audio device class before developing the driver for the USB audio device. I thought it was a hid driver and it should be easy to develop, later, I found myself in an unknown field. Thanks to the previous development of the mass storage firmware program and the knowledge of the ov511 USB camera driver, the development was completed even thoug

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/aaa6695798/archive/2009/11/06/4776202.aspx 　　 All struct declarations can be found in the kernel source file USB. H. If you are interested, read the source code. USB devices are actually complicated, but the Linux Kernel provides a subsystem called USB core to handle mos

1. Linux USB Architecture USB communication is initiated by the host. The USB device driver allocates and initializes an urb and sends it to the USB core. The USB core is changed and sent to the USB host controller driver. The

From: http://www.verycd.com/groups/@g933353/188257.topic Preface: The original XP version cannot be directly installed on a mobile hard disk. It is mainly because the installation program uses USB only as the input device during installation, but not as the storage device, therefore, after the file is copied, it cannot be started again. I have made some minor changes to the configuration file and USB drive

The problem of usb-skeleton.c compilation in Linux System ~ Could you please advise. Urgent. -- Linux general technology-Linux programming and kernel information. The following is a detailed description. I recently learned how to write a program for usb communication between two linux-based servers! The instructor only needs to complete the analysis of the USB dr

Most of the boards produced in recent years support starting systems from USB devices. With this function, even if the Windows XP operating system installed on the hard disk of the computer suddenly fails to start, the user can also start the flash drive through a pre-prepared USB for system check and repair. In the past, the simplest USB boot disk may only be a

When a user uses a USB flash drive, the USB flash drive is suddenly unplugged, or the USB flash drive is temporarily paralyzed due to power failure. When another machine is inserted into the USB flash drive, the "disk I: not formatted" prompt or the USB flash drive cannot be

A lot of friends will be frustrated by the failure of USB connection, let me briefly say: 1. Front USB cable Connection is wrong. This type of failure occurs when the USB cable on the motherboard corresponds to the front USB connector on the chassis, which is also quite dangerous, because the positive and negative con

What should I do if my computer cannot recognize the USB flash drive? Right-click my computer and select "manage" from the shortcut menu to open the "Computer Management" window. In the computer management window, select disk management under "Storage". If you can see a USB flash drive without a drive letter, right-click the USB flash drive, select the "Change dr

This article from Csdn Blog, reproduced please indicate the source: http://blog.csdn.net/aaa6695798/archive/2009/11/06/4776202.aspx 　　 This part of all the structure of the Declaration can be found in the kernel source file usb.h, interested friends can read the source code. USB devices are complex, but the Linux kernel provides a subsystem called USB core to handle most of the complex work, so this is wh

To mount a USB flash drive in Linux, perform the following steps: 1. Insert the USB flash drive into the USB interface and check whether it is inserted. 2. run the fdisk command to check the partition and USB device information [root @ wgods ~]. # Fdisk-lDisk/dev/sda: 1000.2 GB, 1000204886016bytes255heads, 63 sectors/t

With the increasing number of USB devices, we have become more involved in driver development for USB devices. However, many beginners have the following three difficulties:First, we have little knowledge about the driver structure of wince and cannot focus on the development of the driver;Second, I did not understand the examples of the USB driver that comes wit

Author: Dong Yuxin, Zhang Donglai Source: Micro-Computer Information1. Introduction Hardware driver development is the foundation of embedded development. With the popularization of USB devices, the development of USB device drivers has become increasingly important in embedded development. To support different types of platform peripherals that can be connected to Windows CE, Microsoft provides a stream in

The Linux USB Gadget device driver can be used to implement some interesting functions. For example, 1. A storage device in an embedded product or a partition of a storage device, it can be used as a USB flash disk by PC. It can easily complete file interaction. This function is widely used in mobile phones, digital cameras, and other products. 2. After an embedded device connects to your PC through

LInux USB Architecture you can see that a USB system requires 4 drivers: USB device driver (mainly written in this section) , USB Host Controller driver , Gadget Drive , UDC Drive . There are 4 main features of USB: Massstorage: High-ca

A 64 m old USB flash drive is useless. If the USB flash drive is large enough, you can use more powerful mini Linux and winpe with more tools. This time we installed winpe + maxdosv6plux + dwarf dos5.3 + cdlinux0.4.9 + mclinux2.02 + bomberlinux3.7, and there should be more tools. There are many ideas: Method 1: You can first make a DOS boot disk, so that you can directly load various dos tools, and then use

First, describe how the various operating systems start to DOS: WIN9x system: Press F8 after the system is started, and press enter for the first item to enter the basic dos7.x environment that comes with the system.2 K/XP/2003: the system does not have a built-in DOS, And the DOS environment needs to be obtained through the DOS boot disk or virtual soft drive. This article describes how to create four DOS boot disks. The basic program files that exist in the four boot disks are described as fo

Recently, smartctl was used to identify SMART information obtained from a USB hard disk. So I checked the reason carefully. At the same time, remember that when hdparm is used together to sleep the hard disk, the USB hard disk is also a problem. What pass through method is used? At that time, I did not have a deep understanding of it. This time I took a closer look at the Code and related issues. Keywords H

hardware-driven--USB devices (upper) (Driver configuration section) under LinuxHttp://www.ibm.com/developerworks/cn/linux/l-usb/index1.html hardware-driven--USB devices under Linux (bottom) (Drive development section)Http://www.ibm.com/developerworks/cn/linux/l-usb/index2.html on the problem of

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