EmbLogic » digvijay.singh https://www.emblogic.com/blog Embedded System and ARM Training Tue, 03 Mar 2020 13:00:06 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.1 driver of write from the application.. https://www.emblogic.com/blog/03/driver-of-write-from-the-application/ https://www.emblogic.com/blog/03/driver-of-write-from-the-application/#comments Mon, 03 Mar 2014 06:28:04 +0000 http://www.emblogic.com/blog/?p=8775 Continue reading →]]> —————————-
revision 1.15    locked by: root;
date: 2014/03/01 11:19:07;  author: root;  state: Exp;  lines: +5 -0.
Testing……….
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revision 1.14
date: 2014/03/01 11:13:18;  author: root;  state: Exp;  lines: +15 -7
The copy_from_user() function is used to copy a block of data from user space into the kernel buffer.copy_from_user() function contains 3 arguments:
1.A destination buffer,
2.A source buffer,and
3.length in bytes.
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revision 1.13
date: 2014/03/01 11:06:21;  author: root;  state: Exp;  lines: +2 -1
Done memset().
Testing the code…..
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revision 1.12
date: 2014/03/01 11:01:16;  author: root;  state: Exp;  lines: +54 -5
create_quantums() function that will create the required number of quantums.
Kmalloc() is used to allocate memory for each quantum. No. of quantums are dependent on how many number of bytes we are writing from user space.
Filling the memory allocated using kmalloc() with memset() so that it does not contain any garbage.
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revision 1.11
date: 2014/03/01 10:39:39;  author: root;  state: Exp;  lines: +1 -0
memset() function is used to fill the memory allocated for the qset array to ”.
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revision 1.10
date: 2014/03/01 10:36:59;  author: root;  state: Exp;  lines: +14 -4
Using kmalloc() memory is allocated to the required number of qsets , The memory allocated for qset depends upon the architecture of the OS, if the architecture is of 64 bytes then each qset required 8 byte of memory . and 4 bytes for 32 bit OS.Checking whether it is working fine or not.
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revision 1.9
date: 2014/03/01 10:26:27;  author: root;  state: Exp;  lines: +36 -2
Implemented create_scullqset() function.Now checking the number of qsets that needs to created by using the size argument of the chardev_write().After determining the number of qsets that needs to be created create_qset() function is called.
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revision 1.8
date: 2014/03/01 10:07:44;  author: root;  state: Exp;  lines: +2 -1
memset() function to clear the garbage ” .
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revision 1.7
date: 2014/03/01 10:04:21;  author: root;  state: Exp;  lines: +10 -0
Allocating memory for 1 scullqset using kmalloc
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revision 1.6
date: 2014/03/01 09:56:22;  author: root;  state: Exp;  lines: +22 -2
After finding out the number of scullqsets,create_scullqset() function is called to create the specified number of scullqsets.

]]> https://www.emblogic.com/blog/03/driver-of-write-from-the-application/feed/ 0 Getting Major and Minor number of Driver https://www.emblogic.com/blog/02/getting-major-and-minor-number-of-driver/ https://www.emblogic.com/blog/02/getting-major-and-minor-number-of-driver/#comments Sat, 22 Feb 2014 11:41:24 +0000 http://www.emblogic.com/blog/?p=8513 Continue reading →]]> RCS file: init.c,v
Working file: init.c
head: 1.5
branch:
locks: strict
root: 1.5
access list:
symbolic names:
keyword substitution: kv
total revisions: 5;    selected revisions: 5
description:
this is the kernel file to find the major and minor numbers.
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revision 1.5    locked by: root;
date: 2014/02/13 12:11:07;  author: root;  state: Exp;  lines: +13 -12
extern the file_operations fops.
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revision 1.4
date: 2014/02/13 06:08:26;  author: root;  state: Exp;  lines: +28 -18
create no. of device by a one drivers using for loop and give the value 5 to the macro NODE.
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revision 1.3
date: 2014/02/12 16:08:36;  author: root;  state: Exp;  lines: +1 -1
*** empty log message ***
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revision 1.2
date: 2014/02/11 07:28:57;  author: root;  state: Exp;  lines: +32 -24
allocate the memmory to the device ScullDev
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revision 1.1
date: 2014/02/11 04:24:33;  author: root;  state: Exp;
Initial revision
=============================================================================

]]> https://www.emblogic.com/blog/02/getting-major-and-minor-number-of-driver/feed/ 0 https://www.emblogic.com/blog/11/7452/ https://www.emblogic.com/blog/11/7452/#comments Mon, 25 Nov 2013 12:05:20 +0000 http://www.emblogic.com/blog/?p=7452 Continue reading →]]> C  programming

In this article i have written that what i have done during on my embedded engineering training till now.

During these days I have done in project 00 introduction of linux, fedora installation, configuration of ftp(file transfer protocol ) server, tftp(terival file transfer protocol) server, telnet server, ssh(secure shell) server,& configuration of raid( redendent array of inexpensive disk).

In a c programming based project i started with basicof c language .in this project i learn that  introduction of c ,syntex and semantics, control structure(loop and conditional), array and strings,project management tool ,pointer, fileio, functions , linklist etc..

now a days i have knowledge about the many operator.& how to use conditional & loop control structure ie. If -else statement ,case statement,while loop, for loop. I learn that many data types ie. Int ,float, char, double& structure etc. I learn that how to initialize array ,pointer, structure,link list and what are the application of that.I implemented the linklist , stacks, queue also; I used the project management tool ie. Make, make file rcs cvs during to the implementation of many programs. after this i have implemented the debugging tool ie. Gdb.& know the application of gdb debugging.

I have used searching and sorting techniques during to the implementation of the assignment programs. now a days i implemented a program whose name is multi data compression & encryption in which a long array is decompress in a master array with the help of find out the code length while encryption is remain left.

]]> https://www.emblogic.com/blog/11/7452/feed/ 0 assignment https://www.emblogic.com/blog/10/assignment-5/ https://www.emblogic.com/blog/10/assignment-5/#comments Mon, 21 Oct 2013 08:01:54 +0000 http://www.emblogic.com/blog/?p=7373 pls resolve a problem in question no 1 assignment 4 poject 1 in assinment of an aay.

How to represent a repeated no. one time only.

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