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I. Linux USB driver levels 1. devices, configurations, interfaces, and endpointsThe logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has one or more configurations: Each USB device provides different levels of configuration information, which can contain one or more configurations, different Configurations enable devices to exhibit different combinations of functions (

Kernel: Implementation Process of request_irq (riq, handle, irqflags, devname, devid ); Overall idea of Interrupt driver and Application Design: Driver code implementation process:Third_drv.c # Include Application code implementation process:Thirddrvtest. c #include

Access control is sometimes critical for the reliability of a device node. This part of content is only modified on the open and release methods, and some check mechanisms are added. Exclusive Device The most rigid access control method is to allow a device to be opened (exclusive) by a single process at a time, which is the simplest access control for a device driver. The implementation is very simple. For specific code, see the experiment source co

USB connection mode installation drive: 1, put the drive CD into the computer optical drive, and then open the disc, and then pop-up window we select "I have read and accept this License agreement", click Next, as shown in the following figure: 2, the following interface we selected "USB": 3, check the "software and utilities to install", and then click Next Action: 4, click "Advanced Options"-"Browse" This is to replace the driver installat

This article allows reprint, please specify the source:Http://blog.csdn.net/fulinusThe Linux kernel code is too big, a small module will let you unprepared, this afternoon resolved to take the SPI drive a good look.First analyze the spidev.c file, which defines the members in the struct file_operations structure. Members have Spidev_write, Spidev_read, and Spidev_ioctl, and the first two implement half-duplex communication, which implements full-duplex communication. Of course there are open and

ifeq (Some of them are common or we have seen, the first oneIfneq ($ (kernelrelease),)at present, it is useful to refer to the origin ofLinuxunder the source root directoryMakefilewhen compiling the kernel,Kernelreleasemacros are defined, so if you start from the source root directory Makeit will behello.oThe module is compiled into the kernel. KERNELDIR: =/ home/zp1015/desktop/linux-2.6.32.2 kerneldir Assignment, This variable is used to refer to the kernel source directory that we used l

, length *//* Source: One of the endpoints of the USB device */Pipe = Usb_rcvintpipe (dev, endpoint->bendpointaddress);/* Length: */Len = endpoint->wmaxpacketsize;/* Purpose: */Usb_buf = Usb_buffer_alloc (Dev, Len, gfp_atomic, usb_buf_phys);/* Use "3 features" *//* Assign USB request block */Uk_urb = usb_alloc_urb (0, Gfp_kernel);/* Use "3 feature settings Urb" */Usb_fill_int_urb (uk_urb, Dev, pipe, usb_buf, Len, Usbmouse_as_key_irq, NULL, Endpoint->binterval);UK_URB->TRANSFER_DMA = Usb_buf_phys

What if the driver installation fails? If you want to use 91 assistants to give you a mobile phone to install the driver, we have to open the phone's USB debug option to here also to introduce another method: mobile phone installed 91 help 1, install a apk in the handset, then open the handset "WLAN" switch, simultaneously in the computer and the handset all runs "91 assistants". 2, then

A WiFi module was used in the recent project, the master being mt7612u, and the USB interface. Use of Linux version 2.6.35, in the process of compiling the driver encountered a lot of problems, especially in this record. Get the source MTK official website Drive. Contains Windows, Linux, and drivers under the Mac. I modified the GitHub drive. Add a new platform In the source code built some hardware platform configuration information, if not suitable

This question toss for a long, old thought is MySQL drive problem, fortunately finally found that El expression is not recognized${snapshot}"Problem:"-//sun Microsystems, INC.//DTD Web application 2.3//en""Http://java.sun.com/dtd/web-app_2_3.dtd" >The 2.3 version used by the servlet does not support El expressions by default, and the workaround is to add a sentence to the pageJSP page cannot use JSP cause MySQL driver cannot find "java.sql.SQLExceptio

Environment: Operating system: 64-bit WIN7 database: SQL Server SP1 Development language: Java EE Error prompting when Servlet connects to database: [Microsoft] [ODBC Driver Manager] in the specified DSN, the architecture between the driver and the application does not match Workaround: Upgrade SQL Server SP SP1 to SQL Server # SP SP4 o

/** * Author:hasen * Reference: Linux device Driver Development Details * Introduction: Android Small rookie Linux * device Driver Development Learning Journey * Topic: device drivers that support polling operations * DATE:2014-11-07 */ In Globalfifo's poll () function, the r_wait and w_wait wait queue headers in the device structure are first added to the wait list. Then by judging

How do you complain about the driver on a drip trip? When the user sends an order, you can see "when the vehicle information does not comply with the proposal to refuse to ride and make complaints," the prompt and remind passengers, once found that the vehicle information does not match, you can refuse to ride, and directly click on the top right corner of the page "more" to complain. When the complaint is verified, the

) Update.set () with filter modification (recommended) Vi. Inline Array Lookup element operations (LINQ) (i) LINQ query a record (recommended) (ii) LINQ query paging (recommended) Vii. Summary First, preface本教程是入门基础教程，主要是笔者在项目中使用MongoDB .Net官方驱动对MongoDB内嵌文档的操作时遇到了很多不方便的情况，踩了很多的坑，所以单独整理出来一篇文章，来讲一讲笔者踩坑的过程。The author's level is limited, if has the mistake also please criticize correct!(i) Operating environment. NET version.Net Framwork 4.6.2 x64MongoDB data

Tomcat, unable to find the jar package SQLite, the solution is as follows:Locate the Jdk/jre directory you are using, for example: D:\C\Java\jdk1.6.0_10\jrePut the SQLite driver package, such as Sqlite-jdbc-3.8.7.jar, under the \lib\ext directory, which is below the D:\C\Java\jdk1.6.0_10\jre\lib\ext directoryIf still not, you can copy the driver package org/sqlite/native directory below the

The program error is as follows:---------------------------Microsoft Data Link Error---------------------------The test connection failed because an error occurred while initializing the provider. [Microsoft] [ODBC Driver Manager] in the specified DSN, the architecture between the driver and the application does not match---------------------------Are you sure---------------------------With 32-bit and 64-bi

Tags: javaJava database Connection (JDBC-ODBC mode) Environment: Win7 64-bit and NetBeans IDE 7.1.2 jdk1.7.0_17 (64-bit) Write the program and run the error: java.sql.SQLException: [MICROSOFT][ODBC Driver Manager] in the specified DSN, the architecture between the driver and the application does not match. Note: The Win7 64-bit configuration data source, Control Panel-administrative tool Open Data Source

With the increasing of USB devices, development of USB driver is becoming more and more important in embedded development. Windows CE's support for USB 2.0 is a huge boost to this wave of new technologies. The author of this article analyzes his own use-driven development experience, hoping that readers can take less detours. With the increasing of USB devices, development of USB driver is becoming

Various printer installation Tutorials: To install a local printer 1, recognize the printer model, find the printer's drive CD-ROM or download the printer driver from the official website. HP2288, for example, downloads printer drivers from HP's official website, or drives life with a universal drive downloader to download printer drivers 2, double-click the driver to install, after installation after th

The BS System Using C # + ODBC has no problem in vs2005, but it will appear after it is released"Error [im002] [Microsoft] [ODBC driverProgramManager] No data source name found and default driver not specified"Error, the problem is that the type created by DSN is incorrect. In "ODBC data source Manager", you can set three DSN types for connecting to the database: User DSN, system DSN, and file DSN. IIS is a system-level NT Service. Therefore, you ca