reinstall device driver

One of the biggest features of Linux is its network stack. It was originally originated from the BSD network stack and has a very clean set of interfaces, which are well organized. Its interfaces range from protocol-independent layers (such as general Socket Layer interfaces or device layers) to specific layers of various network protocols. This article will explore the Linux network stack interface from the perspective of layering and introduce some

I have been learning device-driven programming for some time and have written several drivers. So I have a new understanding and understanding of the device driver. I have been learning device-driven programming for some time and have written several drivers. So I have a new understanding and understanding of the

Brief introduction The network interface is the third class of standard Linux devices, and this chapter describes how the network interface interacts with the rest of the kernel. The network interface must register itself with a specific kernel data structure in case it is called when the packet is exchanged with the outside world. There is no point in the use of common file operations on network interfaces, so it is not possible to embody Unix's "Everything is a file" ide

Learning device driver Programming also has a period of time, also wrote a few drivers, so there are some new understanding and understanding of the device driver, summed up. Learning device driver Programming also has a period of

_iowr (Type, nr, datatype) For bidirectional transmission _ioc_dir (NR) _ioc_type (NR); _IOC_NR (NR) _ioc_size (NR); return value The implementation of the IOCTL is usually a switch statement based on the command number Can't match any legitimate actions? Some kernel functions will return-einval The POSIX standard specifies that

First, the full source of the program is listed/root/drivers/freg----FREG.C----Freg.h----MakefileFreg.h#ifndef _fake_reg_h_#define _fake_reg_h_#include Freg.c#include MakefileObj-m: =FREG.OIi. steps to write a Linux driver1th Step: Build Linux driver skeleton (load and unload Linux drivers)Any type of program requires a function to begin execution, such as the C language requires a main function, Linux provides two functions module_init and module_ex

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

Before we introduced how to implement a simple character device driver and introduced the basic functions provided by the simple Open,close,read,write driver. But a real device driver often provides more advanced functionality than simple read and write. In this article we w

After two weeks of exploration, I finally had a preliminary understanding of the development of Linux device drivers. Next I will make a summary of the establishment of the development environment for Linux device drivers to facilitate future queries, it also helps beginners of the same path. When users are new to Linux drivers, they often don't know how to compile the