usb ptp

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

Method/Step: 1, in the Millet 4 standby state Click the "Settings" button; 2, in the entry of the settings found inside the "all Set" button, the details are as follows; 3, then we find inside the "About mobile phone" click it open; 4, then we will see on the mobile phone has an "Android version" then we use the finger non-stop click "Android Version" 5 times, the phone will be prompted several open development mode. It just turned on "USB debu

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

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

useless on the wrong road! We don't have to rush to proto_handler to see it first, but read the code outside. When we were young, we thought that the world outside was wonderful? We will skip proto_handler () and read the remaining code in usb_stor_control_thread () to fully understand how the daemon loops. Line 3: as long as the result of the preceding command is that the result of the port-> result is not DID_ABORT, the command is successfully executed. So we call the scsi_done function. R

Usb_stor_control_thread () is basically finished, but the following lines are the climax of the climax. The so-called Bulk-Only protocol for batch transmission. It is shown here. 371/* we amp; #39; vegotacommand, let amp; #39; sdoit! */37... Usb_stor_control_thread () is basically finished, but the following lines are the climax of the climax. The so-called Bulk-Only protocol for batch transmission. It is shown here. 371/* we 've got a command, let's do it! */ 372 else { 373 US_DEBUG (usb_

Reprint: http://blog.chinaaet.com/crazybingo/p/34487I remember having this error when I first installed the driver .... But recently I did not have this error when I installed the other computer ... I can't figure out why. Just take it out and blow it up 、、、、 that's what I did. 、。。。At this point, the installation failed due to Win7 digital certificate issues. 、。。 The egg hurts and dies. (It was 3 months ago 、、、), and then someone big God told me that by setting up the computer to lower the level

the daemon loops. Line 3: as long as the result of the preceding command is that the result of the port-> result is not did_abort, the command is successfully executed. So we call the scsi_done function. Row 390, skipforabort, is a row flag that corresponds to the previous goto skipforabort statement. To continue, Row 3 and the preceding comments are also quite clear. If us_f1_x_timed_out is set, the process with this flag is actually wakened by command_abort, we will talk about command_abort (

In fact, this is a kernel configuration problem, mainly because the file system is incomplete. Of course, the USB driver and mass storage/SCSI disk/vfat support should be selected. If not, refer to the following: 1. Prompt Unable to load NLS charset cp437 Fat: codePage cp437 not found Enter File Systems --"Native Language Support --" Select it. If 2. Prompt again: Unable to load NLS charset iso8859-1Fat: Io charset iso8859-1 not found Enter:File Syste

Procedure1) click "settings" on our mobile phone, click "about mobile phone" as shown in the figure, and then click "More". 2) as shown in the figure, we first find the version number, then click it four times in a row, and then choose "regular"> "more" 3) after you click it four times, a "developer option appears at the bottom of the page, and USB debugging appears.

1. We look at our own USB3.0 drive installation is successful, if not successful we can use the Drive Wizard to install; 2. If we right-click "Computer" on the desktop and click "Manage" to go to "Computer Management", we find "Device Manager," and then find the inside "Universal Serial Bus Controller" as shown in the following figure; 3. Then we right-click USB3.0 in the pop-up menu and click "Properties" and then in the Pop-up Properties window we click on "Power Management" and t

1 Red M 2 A and the millet phone we will have a setting on the desktop now we click on the set to enter and then click on "Other advanced settings" then you will find a "developer option"; (as shown below) 2 Now we click to enter, and then in the developer interface to "USB debugging" open, jump out of the frame and then click "OK" can be. (pictured below) Summary, small set began to think that the red rice 2A developers and millet mobile ph

Preparation steps ① make a quick Start U disk Startup disk② a ghost win8 system image file and deposit into the prepared fast start U disk Startup disk Quick Start one-click Install step We put the production of U disk Boot disk inserted in the computer USB interface, and then restart the computer, in the presence of the boot screen long press the start shortcut to enter the BIOS settings interface, through the mouse up and down the key "↑↓" Select

The usb_stor_bulk_transfer_sglist () function is confusing. We have mentioned that sglist is used to improve transmission efficiency. As we know, SG aims to transmit a bunch of discontinuous buffers in one DMA Operation. In fact, this is not the case in the story of USB. However, if you don't care about the behavior in the USB core, it doesn't matter. Row 3 and row 3 do not pass data if you exit or break th

The options of MTP, PTP, and ums are defined in usbsettings. java. The following code is executed when one of the options is selected. Packages/apps/settings/src/COM/Android/settings/deviceinfo/usbsettings. Java if (preference == mMtp) { mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_MTP, true); updateToggles(UsbManager.USB_FUNCTION_MTP); } else if (preference == mPtp) { mUsbManager

Install ubuntu on a USB flash drive and start Linux from the USB flash drive. If we install the Linux system directly on our hard disk, the GRUB of Linux will overwrite the boot guide of window. It is not convenient to carry. So I want to install a ubuntu system on a USB flash drive, which can be started on any computer. Preparations: A 32g

First, verify the USB device is normal : If the laptop is plugged into the USB device itself, there may be a problem with USB can not use the phenomenon. Verification Method:Method One:Plug the USB device into another computer to see if the computer is available. If this device is not available on other computers, th

Rome was not built in one day. Before making the USB flash drive work, we actually made a lot of preparations for the driver. We continue to follow our feelings. storage_probe (), 972 to 975 rows, and a series of functions named init _ * are called at the moment. Here some lock mechanisms and wait mechanisms are involved, however, it is only initialization, but it is ignored for the time being. It will be explained later, but remember that each row o

Hardware driver in Linux system-USB device (on) There are more and more USB devices, while Linux is still not completely plug-and-play in hardware configuration. how to configure and use Linux is becoming a major problem for us. This article describes how to use and configure the driver and how to compile the driver. For general users, we can clarify the Linux device driver mode and provide convenience fo

How does a USB flash drive become antivirus? _ Analysis of USB flash drive antivirus skills USB flash drives are widely used, but there are not many computer viruses in the USB flash drives. Many people think that the computer will be poisoned, but they often ignore the virus in the