install device driver

address bus, and the memory space can be accessed through 32-bit or 64-bit addresses Boot stage The hardware remains inactive when the PCI device is power-up There will be no memory and I/O ports mapped to the computer's address space Prohibit interrupt reporting Each PCI motherboard is equipped with firmware capable of handling PCI, called BIOS, nvram or prom, and the firmwa

We studied the character device structure Cdev Linux character device driver Development (i)--character device drive structure (upper) below continue to learn several important data structures of character devices. First look at the following diagram, which is the virtual file system in Linux, general

Linux platform device and driver, platform_add_devices ()-> platform_driver_register () Favorites Http://blog.csdn.net/lanmanck/archive/2009/08/17/4455692.aspx From: http://www.diybl.com/course/6_system/linux/Linuxjs/200871/129585.html A new driver management and registration mechanism has been introduced since Linux 2.6: platform_device and platform_driver.

1. Misc_open function AnalysisIn DRIVER/CHAR/MISC.C, the MISC.C is implemented by the driver framework, which is an interface for the Misc driver framework to open a misc device for the application layer.1, first we need to know in misc.c in the Misc_init function, misc This kind of

There are two main tasks for a device driver:1. Accessing the device's memory2. Interruption of processing equipmentFor the first task, the UIO core implements the Mmap () to handle the physical memory (physical memory), the logical RAM (logical memories),Virtual memory. UiO driver Writing is no need to consider these cumbersome details.For the second task, the a

Let's start with a well-written kernel driver module to experience the following character device driversYou can temporarily ignore the following code implementation!Memdev.c#include 1. Compile/install drivers: in Linux systems, drivers are usually encoded using the kernel module's program structure, so compiling and installing a

Linux has always been known for its strong network capabilities, while equipment ' > network equipment is also one of the three major devices that are essential for Linux-driven learning, and because of historical reasons, Linux does not enforce its "all documents" concept for Devices ' > network devices. , the device ' > network device does not use the device fi

---------------------------------------- This article is the original site, welcome to reprint! Reprinted please indicate the source: http://ericxiao.cublog.cn/http://blog.chinaunix.net/uid-20543183-id-1930820.html ------------------------------------------ 1: The forward tty name is derived from the abbreviation of byte by telex. Linux represents various terminals. Terminals usually correspond to hardware. For example, it corresponds to the keyboard and mouse of the input

Although the driver of a specific UART device can completely follow 14.2 ~ The 14.5 method is designed to define tty_driver and implement the member functions. However, Linux has implemented the universal tty driver layer (called the serial port core layer) of the UART device in the file serial_core.c ), in this way, t

configurations have been obtained in the device descriptor, in this case, you only need to read from the device. 5. 21. Set the configuration descriptor pointer. How many pointers are configured? . A Configuration descriptor has nine bytes. In this case, you need to allocate this space to receive the configuration descriptor read back from the device. 5. 23. rea

It indicates that any short read that may occur on an in endpoint should be treated as an error by the USB core. this value is only useful for reading urb from a USB device, not for writing URBS. Urb_iso_asapIf this urb is synchronized, this bit can be set. If the driver wants this urb to be scheduled, as long as the bandwidth permits it, and set the start_frame variable in this urb. if the synchronized urb

Win8 the driver for a device is updated by the following methods: 1, right click on the desktop space, under the desktop pop-up "All applications" option, left click "All applications." 2, left click "Control Panel". 3, the second way into the "Control Panel" method. Press the Windows and X keys on the keyboard simultaneously, and click Control Panel. 4, left click "H

system, which is based on xx_ The. Name content in the driver, the search system registers the device to have this platform_device, if there is, will execute platform_driver (that is, the type of xx_driver) The. Probe function, which is the Spifc_drv_probe () function above.I²C Device/Driver Registration1. Registratio

1. Device Description Structure CdevThe wide variety of drive models required me to extract some of their commonalities from a multitude of models:A. Driver initializationA.1 Assigning device description structureA.2 Initializing device description structureA.3 Registering Device