Writing device drivers in Linux: A brief tutorial

... modules: # lsmod Writing device drivers in Linux: A brief tutorial The first driver: loading and removing the driver in user space 3 Module init In this module-initializing-routine I’ll introduce the ... functions Read data inb Write data Device driver events and their associated functions between kernel space and the hardware device. The “parlelport” driver: writing...

Ngày tải lên: 23/10/2013, 22:15

... URL: http://www.freesoftwaremagazine.com/articles /drivers_ linux Writing device drivers in Linux: A brief tutorial Biography 21 } Closing the device as a file Again, the match is perfect. <parlelport release> ... (http://www.freesoftwaremagazine.com) Writing device drivers in Linux: A brief tutorial A quick and easy intro to writing device dri...

Ngày tải lên: 13/12/2013, 11:15

... 193 Implementing DMA 194 Initiating a DMA Data Transfer 196 Dismantling DMA 196 Creating DMA Tags 197 Tearing Down DMA Tags 198 DMA Map Management Routines, Part 1 199 Loading (DMA) Buffers into DMA Maps ... MALLOC_DEFINE call with the static keyword. In fact, a non-static MALLOC_DEFINE call without a corresponding MALLOC_DECLARE call actually causes a warning under gcc 4.x. Tying...

Ngày tải lên: 29/05/2014, 23:56

... Systems, Inc. Lab 10.4.10: Writing a Script File in Linux Estimated Time: 25 minutes Objective Upon completion of this lab, the student will be able to create a script file and run it in ... need to perform a backup. Instead of typing all these different commands individually each time, a script file can be written to execute all of them with one command. Procedures...

Ngày tải lên: 18/01/2014, 05:20

... that analyzes a particular topic or book, while a research paper involves analyzing raw data and different facts and statistics from a variety of sources. Once you have collected all your materi- al, ... individuals. ■ Seek out new, unique, and alternative sources of information.  Writing with Authority Writing a research paper is very similar to writing an essay. An essay is o...

Ngày tải lên: 18/03/2013, 01:45

... rules. (A note about paragraphing in dialogue: Each time a speaker fi nishes, begin a new paragraph for the next speaker’s dialogue.) “Good afternoon,” said the personal trainer as I walked into ... Moines, Iowa; Barrow, Alaska; Republic of South Africa streets, highways, and roads Grand Avenue, Interstate 29, Deadwood Road landmarks and geographical locations Continental Divide,...

Ngày tải lên: 25/11/2013, 13:00

... Explanation of importance of preplanning • Explanation and sample of an informal outline • Explanation and sample of a formal outline • Explanation and samples of various organizational patterns (chronological, ... patterns (chronological, cause-and-effect, spatial, general-to-specific) Lesson 15: Additional Organizational Strategies 115 • Explanation and samples of additional organizational...

Ngày tải lên: 25/11/2013, 13:01

... mount a filesystem. Network interfaces Any network transaction is made through an interface, that is, a device that is able to exchange data with other hosts. Usually, an interface is a hardware ... Individuals may need to know about drivers in order to gain access to a particular device that is of interest to them. Hardware vendors, by making a Linux driver available...

Ngày tải lên: 24/12/2013, 01:17

... Documentation/CodingStyle is amusing reading and a mandatory lesson for anyone interested in kernel hacking. All the definitions and flags we have introduced so far are best located within the CFLAGS variable used ... be aware of and avoid namespace pollution. Namespace pollution is what happens when there are many functions and global variables whose names aren't meaningful en...

Ngày tải lên: 24/12/2013, 01:17

... philosophical reason and a practical one. Philosophically, it's always a bad idea to put arbitrary limits on data items being managed. Practically, scull can be used to temporarily eat up your ... global variables scull_nr_devs and scull_devices[] (all lowercase) are the number of available devices and the actual array of pointers to Scull_Dev. The calls to down_interruptible a...

Ngày tải lên: 24/12/2013, 01:17