i2c hid device driver

I²C architecture is divided into three parts: I²c core, bus drive, device driverI²c Core :I²c Core provides a set of interface functions that do not depend on hardware, and the I²c-bus driver and device driver depend on the core of I²c as a link.(1) Add/Remove I2c_adapterint I2c_add_adapter (struct i2c_adapter *adap);i

Article Title: Linux Device Driver framework, configuration files, and loading. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. This section describes the Linux Device Driver framew

1.1 Platform bus, equipment and drive In the Linux 2.6 device-driven model, care is being put on the bus, device, and drive of these 3 entities, and the bus binds the device and the driver. When the system registers a device, it looks for a matching

/O register has a side effect. Therefore, you cannot perform operations on it and cannot use the CPU cache. Http://qinbh.blog.sohu.com/62733495.html Second statement: My understanding: the I/O port is associated with the actual external device, and the access to the I/O port controls the external device. The "marginal effect" refers to the control device (read or

USB device driver mouse 1. Overview The USB mouse driver is roughly divided into two parts: the driver of the USB device and the driver of the input device. The

In the device-driven model of the kernel, the three entities are concerned with the bus, device, and drive.When the system registers a device, the bus looks for the matching driver, and the bus will look for the matching device when the system is registered with each driver.

take a look at this function of the HID device. It also allows the operating system to recognize the USB device as a mouse device. As mentioned above, there is also a callback function for notification messages, which we have found in the program body just now:Usbfuncs-> lpregisternotificationroutine (hdevice, usbdev

Tian haili @ csdn 2011/08/26 In the device driver model of Linux 2.6, all devices are connected by bus. When device_register ()/driver_register () is executed, the driver/device on the enumeration bus is used for binding. This article describes this process. This is the basis for the entire Linux

connect with the kernel, into the kernel. What do you do? Why the trouble? Remember, God is fair, in the drive this trouble point, add a variety of device registration functions, is for the convenience of the application. Makes the application look at the driver is a kind of. For example: Whether you are a i2c,spi or a simple gpio

Go to Chapter 4 debugging technology of Linux Driver (version 3rd. I. kernel debugging support has been suggested earlier: to learn how to write a driver, you need to build and install your own kernel (Standard main kernel ). One of the most important reasons is that kernel developers have already set up a number of debugging functions. However, as these functions cause additional output and decrease, the r

Linux Device Driver Model: My Understanding of xxxx_coreFor Linux, some commonly used device drivers, such as codec, UART, and I2C, all have a xxxx_coreProgramImplementation, such as serial_core. What kind of structure is this? In fact, this provides a general principle implementation mechanism. For example, if you wan

Author: (printed) Sreekrishnan Venkateswaran [Translator's introduction]Translator: Song Baohua; he zhaoran; Shi Haibin; Wu guocheng [same translator's work]Series name: Turing programming SeriesPress: People's post and telecommunications PressISBN: 9787115221674Mounting time:Published on: February 1, March 2010Start: 16Page number: 1Version: 1-1Category: Computer> operating system> Linux IntroductionThis book is an authoritative book in the field of Linux d