Why You Need to Download Logitech Wireless Mouse Drivers

It’s really wonderful to hear that you have just brought home a brand new wireless mouse of Logitech! Now you will be able to handle your mouse with much more freedom and the cluttering at your work space due to the wires will also get reduced. But Logitech...

Thứ Sáu, 27 tháng 5, 2011 00:03 Đọc tiếp >>

An End to Troubled Printing: Epson Printer Driver Download

So you love printing a lot and you own an Epson printer. That’s really great; you’d be able to print out almost everything, all that you want, and whenever you need. Wow, you’d have all your vacation photographs ready to be shown to your friends and...

Thứ Tư, 18 tháng 5, 2011 22:25 Đọc tiếp >>

Writing Device Drivers In Linux

Events Kernel functions Read data Write data Table 2. Device driver events and their associated functions between kernel space and the hardware device. The first driver: loading and removing the driver...

Thứ Tư, 18 tháng 5, 2011 08:51 Đọc tiếp >>

Writing Device Drivers In Linux

Pre-requisitesIn order to develop Linux device drivers, it is necessary to have an understanding of the following:C programming. Some in-depth knowledge of C programming is needed, like pointer usage, bit manipulating functions, etc.Microprocessor programming....

Thứ Tư, 18 tháng 5, 2011 08:51 Đọc tiếp >>

Writing Device Drivers In Linux

The “Hello world” driver: loading and removing the driver in kernel spaceWhen a module device driver is loaded into the kernel, some preliminary tasks are usually performed like resetting the device, reserving RAM, reserving interrupts, and reserving...

Thứ Tư, 18 tháng 5, 2011 08:50 Đọc tiếp >>

Writing Device Drivers In Linux

To develop this driver, several new #include statements which appear frequently in device drivers need to be added: =/* Necessary includes for device drivers */#include // here linux/init.h#include // here linux/config.h#include //here linux/module.h#include...

Thứ Tư, 18 tháng 5, 2011 08:49 Đọc tiếp >>

The file_operations Structure

The file_operations structure is defined in linux/fs.h, and holds pointers to functions defined by the driver that perform various operations on the device. Each field of the structure corresponds to the address of some function defined by...

Thứ Tư, 18 tháng 5, 2011 08:48 Đọc tiếp >>

Read and Write a /proc File

We have seen a very simple example for a /proc file where we only read the file /proc/helloworld. It's also possible to write in a /proc file. It works the same way as read, a function is called when the /proc file is written. But there is...

Thứ Tư, 18 tháng 5, 2011 08:46 Đọc tiếp >>

The /proc File System

In Linux, there is an additional mechanism for the kernel and kernel modules to send information to processes --- the /proc file system. Originally designed to allow easy access to information about processes (hence the name), it is now used by...

Thứ Tư, 18 tháng 5, 2011 08:46 Đọc tiếp >>

Manage /proc file with standard filesystem

We have seen how to read and write a /proc file with the /proc interface. But it's also possible to manage /proc file with inodes. The main interest is to use advanced function, like permissions. In Linux, there is a standard mechanism for file...

Thứ Tư, 18 tháng 5, 2011 08:45 Đọc tiếp >>

Talking to Device Files (writes and IOCTLs)

Device files are supposed to represent physical devices. Most physical devices are used for output as well as input, so there has to be some mechanism for device drivers in the kernel to get the output to send to the device from processes. This ...

Thứ Tư, 18 tháng 5, 2011 08:44 Đọc tiếp >>