Now that you know how to write the module, writing the device driver is naturally not difficult. I believe that no one who writes a module will find it difficult to write a device driver. Really, I'm not telling you the truth. writing a driver is not difficult. you can say with confidence that you can already write a device drive... Info nbsp
Now that you know how to write the module, writing the device driver is naturally not difficult. I believe that no one who writes a module will find it di
Now that you know how to write the module, writing the device driver is naturally not difficult. I believe that no one who writes a module will find it difficult to write a device driver.Really, it's not difficult for me to write a driver. You can say with confidence that you can write a device driver. Yes, that's right. "Rejoice, so confident ."As mentioned above, every module starts with module_init and ends with module_exit. Let's take a look at the U drive module. In the vast sea of people,
We followed storage_probe () almost completely, and it seems that everything is about to end, but do you think you haven't understood how the device works so far? USB flash drives are not only USB devices but also "disks". They also need to comply with the USB Mass Storage protocol and Transparent SCSI specifications. From the driver's perspective, it is similar
USB flash drive installation system tutorial _ win8 system USB flash drive installation tutorial, _ win8
USB flash drive installation system tutorial
Step 1
Insert the prepared Chinese cabbage U disk boot disk into the usb interface (Desktop Users are advised to insert the U disk into the
Charm MX4 Pro USB Debugging Open Open method one:
We click on the "Auxiliary settings"-"Developer tools" on the phone, and then we can open the USB debug mode directly in the Open interface, as shown in the following figure.
Charm MX4 Pro USB Debugging Open method two:
To enter the MX4 Pro Phone Dialer, we directly enter "*#* #6961 #*#" directly o
Installation Configuration minicom--------------------------------------------------
#
lsmod | grep usbserial(If you use the serial port directly, but do not use USB to switch serial device, this step can be skipped)
If there is usbserial, the system supports USB to the serial port.
Install minicom (fedora comes with minicom, this step can be skipped)
apt-get Install minicom
apt-get Install Lrzsz
Confi
1 in the Millet 2S desktop to find "settings" and then we click to enter, and then see below there is a "developer option" Now we click on it to enter.
2 Then we find "USB debugging" after entering the interface to open it, when we open will pop up a prompt, the content is "whether to allow USB debugging" click OK.
Friendly tips, this millet 2S did not upgrade to Android 4.2 Previous version of the ph
1 We click on the mobile desktop "settings" and then find "about the phone" to enter after the click "More" specific as the figure.
2) and then we find the version number, and then we click on 4 consecutive times, and then from "General"-"more".
3 good so in more inside will see there is a "developer option, and finally the USB debugging appears
Summarize
In fact, all Android 4.2 and later version of the
1. As shown in the following figure, we click the "Settings"-"All settings" interface in the Millet 3 phone.
2. Then in the following figure you will see a "about the phone" option, click Enter, and then see the Android version of the option.
3. Here I can open the developer option by simply clicking "Android Version" four times in a row.
4. In the developer options interface can be found in the USB debugging mode, click to open the
Procedure:
Use cfdisk to create two partitions in the USB flash drive, and use the second partition as the boot partition.0: mkfs. ext3/dev/sdc5
1: mount/dev/sdc5/tmp/boot
2: grub-install -- root-directory =/tmp/boot -- no-floppy/dev/sdc (* Note *)
Modify the menu. lst file by yourself. This is simple.**************************************** ************************************All of the above are overturned and rewritten. You must understand the theo
Objective: To study USB in depth and take notes here. Welcome to the discussion.
[Linux 3.2] [Driver/USB/CORE/hub. C]
Function: usb_hub_init
int usb_hub_init(void){if (usb_register(hub_driver)
Usb_hub_init mainly implements two functions: one is to register the hub driver, and the other is to start a kernel thread named khubd (this thread can be seen through PS or called a process. The kernel does not di
confident ."
As mentioned above, every module usesModule_initStartModule_exitLet's take a look.UDisk Driver. In the vast sea of people, we can easily find this fileDrivers/USB/storage/USB. cIn this file, it is not difficult to find the following section:
1068 static int _ init usb_stor_init (void)
1069 {
1070IntRetval;
1071Printk (kern_info "Initializing USB Mas
VMWare cannot detect the USB flash drive solution. vmware detects the USB flash drive.Solution:First, confirm that the service is enabled:Right-click your computer and choose manage> services and applications> services> VMware USB Arbitration Service. Right-click and choose start ].Set VMware:[VM]-> [Settings]-> [Hardware]-> [
How to install win10 on a USB flash drive and win10 on a USB flash drive
According to a third-party statistical survey, the win10 system is now the world's second largest operating system. Many users are still puzzled about how to install the win10 system on the USB flash disk, the following u launch will share with us the detailed operating process of the
Today solves a keyboard conflict problem, suddenly think of a oneself think for a long time has not done experiment, a Windows computer, simultaneously access 2 USB mouse and 2 USB keyboard, the result how.In person, a Windows computer, with 2 USB mouse and 2 USB keyboard, can be used normally.Two keyboards can be type
1. Right-click "computer"-"device manager" on the desktop on the computer, and click "menu bar-> view-> sort devices by connection" on the displayed page:2. As shown in the figure above, the device should be a usb storage device, and then go to the directory:, find a folder starting with usb Stor, copy and download the folder, and paste it on the desktop, as shown in the figure
Q: My Computer motherboard USB interface is broken, choose to use an extended USB interface to connect the USB scanner, but bought a USB connector parts, plug into the motherboard but can not use, this is what reason?
A: USB connector to define the various motherboards are
Get what we need from the two tables, and then the following code is expanded around the two pointers. (Unusual_dev and id) continue to read get_device_info ().
Row 3: Record unusual_dev in us. There is also such a member in us. In this way, it will be easy to use after recording. Because us runs through the whole story, it is very convenient to access its members and can be accessed at any time, however, the us_unusual_dev_list and storage_usb_ids tables will not be reused this time. Because w
USB flash drives are common among many external devices, but computer viruses are also caused by viruses carried by USB flash drives in many cases, on Windows 7, how does one disable the use of USB flash drives? Do you want to make your computer more secure? In fact, there is a magic system file in the computer, called the registry. We can modify the registry to
Before talking about the data transmission stage, we should first solve the historical issues left over. In usb_stor_bulk_transfer_buf (), row 406 has an interesting function called interpret_urb_result. This function is also from drivers/USB/storage/transport. C:
265 static int interpret_urb_result (struct us_data * us, unsigned int pipe,
266 unsigned int length, int result, unsigned int partial)
267 {
268 us_debugp ("status code % d; transferre
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