agp driver

Original article: Documentation/I2C/upgrading-clientsTranslator: Guo shaobei2010/05/10 Update I2C drivers to the new 2.6 Driver Model========================================================== ========== Note: the I2C driver here refers to the I2C client driver, for example, RTC, USBTransceiver driver and so on. Ben doo

Call other driver functions in the driver (fastcall) Author: Lai yuping (auly) aulyp@163.com In embedded systems, some communication ports are public, such as IIC ports and serial ports. Drivers of these ports are usually written by the OEM manufacturer and tested, relatively stable. We do not need to write an IIC driver when developing drivers for other devices

This kind of driver mainly presents streaming function interfaces, including XXX_Init, XXX_Deinit, XXX_Open, XXX_Close, XXX_Read, XXX_Write, XXX_Seek, XXX_IOControl, XXX_PowerUp, XXX_PowerDown, etc, note that the preceding interfaces must be output, and XXX must contain three characters. Otherwise, an error occurs. You can manually call the RegisterDevice () and DeregisterDevice () functions to load and uninstall the

Kernel 2.6.29.4 USB devices are actually complicated, but the Linux Kernel provides a subsystem called USB core to handle most of the complicated work. Therefore, the interface between the driver and USB core is described here.In the USB device organization structure, there are four layers: device, config, interface, and endpoint.A brief description of these four layers is as follows:A device usually has one or more configurations.Configuration often

Linux Device Driver Article 2: How to implement a simple hello world Driver The previous article introduced the concept of the linux driver and the basic category of the device driver in linux and the basis and differences of each category, this article describes how to write a simple test

Driving life may be driven by the installation of an Apple phone, we just drive the life on the computer, and then turn on our click "Update Now" button to update, this drive life can help us install the latest driver. Click to open the peripheral driver interface, you can see that the computer all external access to the USB input device, will appear in this interface. Click on a device, you can view t

During hardware power-on initialization, the BIOS checks all PCI devices and assigns a physical address to each device. The address is obtained and written to the configuration space of the device through the bios, And the CPU cannot be accessed directly, the driver can map this configuration space to common memory through ioremap for CPU access. When the operating system is initialized, each PCI device is assigned a pci_dev structure and the previous

After explaining the framework of the dm9000 NIC Driver in the first blog in this series, we should analyze this "giant thing" for beginners by module. This article first explains the. Driver and. Remove branches. What? I don't know what the two things are? Please first look at the younger brother this series of first blog (http://blog.csdn.net/jarvis_xian/archive/2011/06/10/6537446.aspx ). Before introduc

★ Overall IntroductionLED driver mainly realizes the hardware drive of 4 LED lights on the TQ2440 Development Board, realizes the Pin GPIOB5, GPIOB6, GPIOB7, The high and low level setting of the GPIOB8 (the configuration of the PIN is already implemented in the COMMON-SMDK.C), the driver is called by the test program, and the LED light is illuminated by command.★ Specific Introduction 1,

Video:Driver Registration: Http://pan.baidu.com/s/1i34HcDBDevice registration: Http://pan.baidu.com/s/1kTlGkcRBus _ Device _ driver registration process? Registration flowchart? Devices generally need to be registered before they can register the driver– Now more and more hot-pluggable devices, in turn. Register the driver first, the device is registered againEqu

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

Linux Device Driver inquiry 1st days ---- spi Driver (1), 1st days ---- spi This document allows reprinting. Please indicate the source:Http://blog.csdn.net/fulinus The Linux kernel code is too big, and a small module will make you feel helpless. This afternoon, I am determined to take a good look at the spi driver. First, analyze the spidev. c file, which define

Linux loopback NIC Driver Design, linux loopback NIC Driver Loop NIC Driver1. The difference between a back-to-loop network card and a common network card is that it is virtual rather than a physical network card. It is equivalent to concatenating the sending end and the receiving end of the common network card.2. in the kernel source code, the loopback Nic Program (drivers/net/loopback. c) It is not provid

The cause of this error is that the computer used is 64-bit, but the MySQL 64-bit ODBC driver and the qt odbc driver do not know where it is incompatible, so the connection may fail. Reinstall MySQL's 32-bit ODBC driver for configuration, and connect again (64-bit and 32-bit drivers can work normally, this is not scientific = ). = ===============================

Another problem! When the camera application is started, it needs to write the Register through the IIC bus, and there are still a lot of them. In this process, the power management IC driver also needs to read the battery voltage, current, and charge/discharge status through the iic bus. In this way, TX time out occurs. Turning off the PMU driver to read IIC, the camera module writes register each time! A

Download Chrome Driver First (the installation of Firefox Driver is the same as this step)Link:Http://chromedriver.storage.googleapis.com/index.htmlNext, on the console (terminal), manipulate the instructions for the red font: Install Unzip sudo apt-get install unzip Assuming you ' re running a 64-bit OS, download the latest version of Chromedriver from their website wget -N http

/** * 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