Driver:
/* Whjled. C */
# Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include
# Include # Include # Include # Include # Include # Include # Include # Include # Include # Include
# Define led_on 1# Define led_off 0# Define device_name "whjled"# Define led_major 98
Static unsigned long led_table [] ={S3c2410_gpb (5 ),S3c2410_gpb (6 ),S3c2410_gpb (7 ),S3c2410_gpb (8 ),};
Static
When you manually install the NIC driver, the system prompts "Windows cannot find the driver file of the device", as shown in the figure below:This problem is caused by the useIncorrect driverThe system cannot be identified.Solution1Download the correct driverCheck the model and hardware version of the network card. We downloaded it from the official website. Of course, here we use tplink as an ex
Tags: style c blog http a widthOpen method error when generating application in C # when reading and writing DBFERROR [IM002] [MICROSOFT][ODBC driver Manager] did not discover the data source name and did not specify a default driverBefore this program is used well, this upgrade modified after testing found this problem, seeked, originally I was a 32-bit operating system, now installed Win7 64-bit operating system, from the Control Panel-management to
The Linux kernel is highly customizable and can be customized by configuring the compilation options.When configuring the kernel compilation option, there are generally three compiler options for the driver, not compiling, compiling kernel-driven, and compiling to module-driven. So Linux drivers are generally divided into two categories, kernel-driven and module-driven, of course, there is no absolute difference between the two; when compiled into ker
How to detach a win7 video card driver _ How to detach a video card driverSome users often encounter video card problems caused by incompatibility problems when using the win7 system. If you encounter this problem, you can update or uninstall the video card driver. So how can I unmount the graphics card driver in Win7? It is difficult for general users. The follo
This concept emerged when the new sysfs management device driver was adopted in linux2.6 and can be intuitively understood under the/sys directory.
Bus indicates the bus type, such as I2C, IDE, USB... many bus types such as platform, including MTD devices;
Device records device resources, specific to the NAND driver, is added in the board-osk.c struct platform_device osk5912_nand_device;
IPhone 4S is connected to a computer and cannot recognize iPhone devices: Apple mobile device USB driver Driver Installation failure shows yellow exclamation mark Solution
Apple mobile device USB driver Driver Installation failure shows a yellow exclamation point, cannot charge, let alone iTunes.
The correct soluti
ADB self-made universal driver method, exclusive secret
This article from: http://kraft.iteye.com/blog/1275276
Android often encounters a mobile phone that cannot find the ADB driver, or to adapt to multiple drivers, there is actually a very simple solution.Use the Official Google Android driver as the blueprint to add your own devices.
Prepare notepad to open ex
The audio driver is implemented in the wavedev2 mode. This is a single-layer driver mode, and all platform-related functions are implemented in hwctxt. H and hwctxt. in CPP, it also includes MIDI support, software mixer support, S/pdif interface, gain class interface, forcespeaker interface, and so on.
(1) software implementation of the audio system
Audio Device Drivers transmit audio data streams through
Wait Queue:
In Linux driver programming, waiting queues can be used to implement blocking of processes.
The wait queue can be thought of as a container for the save process, and the process is placed in a wait queue when the process is blocked;
When the process is awakened, the process is fetched from the wait queue.
waiting for the definition and initialization of the queue wait_queue_head_t Declare_wait_queue_head:
The Linux 2.6 kernel provides the
The driver wizard's friends know that the driver wizard is used to repair the computer hardware software, everyone in the internet when there is a computer network card driver display is "yellow exclamation mark", and then the Web page can not open, small series encountered such a situation, this time everyone first thought must be the NIC
Now, let's write our own first character device driver--light LEDs. (Imperfect, back to perfect)
Hardware platform: Exynos4412 (FS4412)
Writing the drive is divided into the following steps:
A--View the schematic, data manual, understand the equipment operation method;
B-Find a similar driver in the kernel, develop it as a template, and sometimes need to start from scratch;
C-Implement
Will drive from the NVIDIA official website download back to enter the text mode directly run the installation, found that prompted the following error:
Error:the Nouveau Kernel Driver is currently into use by your system. This
Driver is incompatible with the NVIDIA driver, and must being disabled
Before proceeding. Please consult the NVIDIA
If you keep reporting this error,First, you do not have the relevant database driver locally (mysql:-->pdo_myql,postgresql-->pdo_pgsql, etc.);Need to performphp-m| Grep-i PDOSee what drive configurations you have;Driver configuration in: Your local PHP file has a php.ini file, search pdo_myql or Pdo_pgsql, which will be used to remove the preceding comma, the comma in the INI file is the meaning of comments
1, the graphics driver version and the graphics card is not compatible, graphics driver version is very many, not the latest graphics driver is suitable for your graphics card, some old graphics instead of using the older version of the driver more stable, such a situation is recommended to download when the display of
Some experiences of installing the alsa sound card driver in Linux are expected to help those who fail to install the driver-Linux general technology-Linux technology and application information. The following is a detailed description. Which of the following is my personal information? Maybe you only have one thing missing, or more, double or totally different situations, however, I still hope that the fol
A system vulnerability in a taxi in Xiamen allows you to view the driver information (Remote Control of the playing device in the car \ acquisition of Xiamen taxi driver photo ID card number, etc)
Information of 2000 out 130 drivers cracked
Http://www.xm968890.com: 8008/Multimedia Electronic Program Dispatch System for taxis in XiamenUnauthorized access
Information can be pushed to empty vehicles or heavy
Backlight Driver Design
1. Here the hardware interface uses the s3c2450 gpb1, that is, the timer 1.
The input frequency of the timer is pclk/{prescaler value + 1}/{divider value }.
First set prescaler value:
Static void bak_setprescaleandmux (DWORD v_prescale, DWORD v_mux)
Then set divider value:
Static void bak_settcntb (DWORD v_tcntb)
2. Set the PWM pulse width of the tout1 Timer:
Static void bak_settcmpb (DWORD v_tcmpb)
3. After these settings
Windows driver development and windows driver development
In the previous article "Windows driver development-4", we have completed hardware preparation. However, we do not have specific data operations, such as receiving read/write operations.
Before performing such operations in WDF, you must perform device I/O control to ensure data integrity.
We know that WDF
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