This chapter is a concrete example of the complete process of developing and testing a Linux driver. Especially test Linux drivers. In this example of counting the number of words, the emphasis is on the implementation of the algorithm: the Linux driver, not how to count. Wh
size of all device descriptors behind 4, know the remaining device descriptor size, you can read the remaining device descriptors 5. Then put the device into the Usb_bus_type's dev link list 6. Remove the Usb_bus_type from the driver list Usb_driver 7, the Usb_interface and usb_driver of the id_table comparison (for the USB mouse is the ultimate comparison of the interface descriptor under the Binterfaceclass;binterfacesubclass; Binterfaceprotocol; t
In Linux, the simulator can be directly identified, and there is no restriction on the use of ADB, but after the mobile phone is plugged into the USB, ADB does not recognize it and displays a question mark, which is also true in eclipse.
The solution is as follows:
1. input lsusb in Bash. We can see that many of the bus devices are
Troubleshooting of failed connection to the andoid device by ADB in Ubuntu Linux
The original post is in:Http://www.hiapk.com/bbs/thread-3342-1-1.htmlWhen G1 is connected through USB in Ubuntu 9.04 and ADB is used, the device cannot be found. The solution is as follows:1) run on the terminalLsusbThe following similar records will be found in the results:
1.Connect andriod Device to your Linux * * * *.
2.Use "Lsusb".
Use LSUSB to check the Android device ID into USB subsystem, like below (Does not care "$"):
$ lsusb
Bus 001 Device 002:id 0fce:6156 Sony Ericsson Mobile
Number "0FCE" is the Andriod device ID of use subsystem.
3.Update adb tool.
Turn to Android SDK folder "Tools", Typein below words:
$./android adb
1. Device Driver. In the Linux device model, the device driver is represented by the device_driver structure.
Struct device_driver {const char * Name;/* name */struct bus_type * bus;/* attached bus */struct module * owner; const struct of_device_id * of_match_table; INT (* probe) (struct device * Dev);/* call */INT (* remove) (struct device * Dev) when the devic
In the previous two articles, described the compilation of Android source code and kernel source code, this article based on the previous, not clear please first move:Source code CompilationKernel compilation---------------------------------------------------------------------------------------------After the emulator has been started with the following command:Export path= $PATH:/usr/local/android/android2.3.7/out/host/linux-x86/binExport Android_pro
Now that we've entered the actual combat phase, we've learned the complete process of developing and testing a Linux driver using an example of counting the number of words. The first Linux driver is a count of the number of words.Instead of accessing the hardware, the Linux
Install Nvidia graphics card driver in Linux: Disable The Nouveau kernel driver. Method System: Red Hat Enterprise 6 (32-bit) video card: after downloading the driver from the Nvidia official website, Nvidia Gforce 7300GT directly runs the installation in text mode. The following error message is displayed: nvidia-inst
important thing is its fs_ops member. You need to implement interfaces in fs_ops for specific devices.
Whether to use interrupt handling
Memory Access
If the video card does not have its own video memory, the system memory is allocated as the video memory.
The graphics card comes with a video memory and is accessed using the I/O memory interface (request_mem_region/ioremap ),
For more information about how to write drivers, see "Linux
. After reading all the content, you will exit. If you want to quit early, just press the Q key. Less is the same as more, but better than the more good can be turned upside down. The SPACEBAR can also be paged, while pressing the "J" key can be moved downward (click to move down one line) and press "K" key to move up. When you use more and less to view a file, you can click the "/" key and then enter a word carriage return so that you can find the word. If you have more than one word, you can p
Part of this article refers to the blog from Droidphone (http://blog.csdn.net/droidphone/article/details/6271122), about Alsa writing a very good article, just a few examples. This article is a combination of examples to analyze the ALSA audio driver.Development environment: ubuntu10.04Target board: linux-2.6.37 (view Linux kernel information via command uname-r)Compiler: arm-none-
Original URL: http://www.cnblogs.com/geneil/archive/2011/12/03/2272869.htmlfirst, the Linux system divides the device into 3 categories: Character device, block device, network device. Using drivers:1, character device : Refers to a byte can only one byte read and write devices, can not randomly read the device memory of a certain data, read data need to follow the data. The character device is a stream-oriented device, and the common character device
Label:
adt-bundle-linux-x86_64-20131030 new project prompts for no solution to ADB and r.java issues
Under ubuntu14.04, build an Android development environment and download the official adt-bundle-linux-x86_64-20131030. Start Eclipse and create a new project. Tip "R" file is not found, that is, R file is not. Start Simulator Tip "... Cannot run Prog
Framebuffer is a display device inside Linux. How to operate the LCD at the bottom of the drive to achieve graphical display.1. What is Framebuffer?(1) First consider how we operate the LCD in bare metal.The SOC has an LCD controller, an LCD driver outside the SOC, an LCD driver connected to the LCD screen, a CPU inside the SOC, and an external DDR memory. These
emulator will list the display2. Installing the Software$ADB Install This command installs the specified APK file on the device (if it is an overlay installation, add the-r parameter after install)3. Uninstalling the Software$ADB Uninstall $ADB uninstall-k If you add the-K parameter, the software is uninstalled but the configuration and cache files are preserved
The relationship between device and driver in linux driver development-Linux general technology-Linux programming and kernel information. The following is a detailed description. Yesterday I saw a piece of news titled "Housewives use LIN
Access to the character device is performed through the device name in the file system. Those device names are simply nodes that are called file system trees, and they are typically located in the/dev directory. Device files for character device drivers can be identified by ' C ' in the first column of the ls-l command output. Block devices are also located in/dev, identified by the character ' B 'CRW-RW----1 root root 253, 0 2013-09-11 20:33 Usbmon0CRW-RW----1 root root 253, 1 2013-09-11 20:33
Access to the character device is done through the device name in the file system. Those device names are simply nodes that are called file system trees, and they are typically located in the/dev folder.Device files for character device drivers can be identified by ' C ' in the first column of the ls-l command output. Block devices are the same in/dev, identified by the character ' B ' crw-rw----1 root root 253, 0 2013-09-11 20:33 usbmon0 CRW-RW----1 root root 253, 1 2013-09-11 20:33 usbmo
first, the Linux system divides the device into 3 categories: Character device, block device, network device. Using drivers:1, character device : Refers to a byte can only one byte read and write devices, can not randomly read the device memory of a certain data, read data need to follow the data. The character device is a stream-oriented device, and the common character devices are mouse, keyboard, serial port, console and led device.2, block device
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