EmbLogic » Embedded Linux 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 Basic board bring up of Olinuxino board & solved libncurses issue. https://www.emblogic.com/blog/01/basic-board-bring-up-of-olinuxino-board-solved-libncurses-issue/ https://www.emblogic.com/blog/01/basic-board-bring-up-of-olinuxino-board-solved-libncurses-issue/#comments Fri, 20 Jan 2017 13:03:50 +0000 http://www.emblogic.com/blog/?p=13858 Continue reading →]]> Built the U-boot successfully through the host and built the kernel and wrote the files in sd card.
There was an issue while configuring menu in linux-sunki folder, the issue was libncurses problem in fedora.
Then I installed libncurses by yum install ncurses-* .
After installing the libncurses i was able to access the menuconfig.

]]> https://www.emblogic.com/blog/01/basic-board-bring-up-of-olinuxino-board-solved-libncurses-issue/feed/ 0 PYTHON-simple program using format() https://www.emblogic.com/blog/06/python-simple-program-using-format/ https://www.emblogic.com/blog/06/python-simple-program-using-format/#comments Sat, 07 Jun 2014 07:20:04 +0000 http://www.emblogic.com/blog/?p=10373 Continue reading →]]> RCS file: ./hello.py,v
Working file: ./hello.py
head: 1.5
branch:
locks: strict
root: 1.5
access list:
symbolic names:
keyword substitution: kv
total revisions: 5; selected revisions: 5
description:
printing “Hello” in python
successfully done…..:)
—————————-
revision 1.5 locked by: root;
date: 2014/06/07 07:15:09; author: root; state: Exp; lines: +1 -1
again analyzing the format() statement
—————————-
revision 1.4
date: 2014/06/07 07:13:14; author: root; state: Exp; lines: +1 -0
now analysing the result when we want to have three
decimal values if any number is divided by any value
successfully obtained
—————————-
revision 1.3
date: 2014/06/07 06:42:42; author: root; state: Exp; lines: +3 -0
using format() in which
I am printing name and age
—————————-
revision 1.2
date: 2014/06/07 06:37:47; author: root; state: Exp; lines: +1 -0
printing another statement and analyzing that
print statement written in next line
will also print in next line
—————————-
revision 1.1
date: 2014/06/07 06:36:15; author: root; state: Exp;
Initial revision
=============================================================================

]]> https://www.emblogic.com/blog/06/python-simple-program-using-format/feed/ 0 Use Of Class in C++ https://www.emblogic.com/blog/06/use-of-class-in-c/ https://www.emblogic.com/blog/06/use-of-class-in-c/#comments Fri, 06 Jun 2014 14:02:31 +0000 http://www.emblogic.com/blog/?p=10359 Continue reading →]]> RCS file: ./class.cpp,v
Working file: ./class.cpp
head: 1.1
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 1;    selected revisions: 1
description:
Using Class in C++
from the main function I have created the object file to transfer the data into the public section of the class
and the public section will access the private section of the class
I have entered the values from user into the the public function of C++
successfully written and read
from the public function
—————————-
revision 1.1
date: 2014/06/06 14:02:33;  author: root;  state: Exp;
Initial revision
=============================================================================

]]> https://www.emblogic.com/blog/06/use-of-class-in-c/feed/ 0 Simple program in c++ https://www.emblogic.com/blog/06/simple-program-in-c/ https://www.emblogic.com/blog/06/simple-program-in-c/#comments Fri, 06 Jun 2014 13:57:18 +0000 http://www.emblogic.com/blog/?p=10355 Continue reading →]]> RCS file: ./simple.cpp,v
Working file: ./simple.cpp
head: 1.1
branch:
locks: strict
access list:
symbolic names:
keyword substitution: kv
total revisions: 1; selected revisions: 1
description:
printing “My name is Ruchi”using
string mystring
—————————-
revision 1.1
date: 2014/06/06 12:46:39; author: root; state: Exp;
Initial revision
=============================================================================

]]> https://www.emblogic.com/blog/06/simple-program-in-c/feed/ 0 Kernel https://www.emblogic.com/blog/06/kernel/ https://www.emblogic.com/blog/06/kernel/#comments Thu, 05 Jun 2014 07:49:46 +0000 http://www.emblogic.com/blog/?p=10326 Continue reading →]]> Kernel
Definition – What does Kernel mean?
A kernel is the core component of an operating system. Using interprocess communication and system calls, it
acts as a bridge between applications and the data processing performed at the hardware level.
When an operating system is loaded into memory, the kernel loads first and remains in memory until the
operating system is shut down again. The kernel is responsible for low-level tasks such as disk management,
task management and memory management.
Techopedia explains Kernel
A computer kernel interfaces between the three major computer hardware components, providing services
between the application/user interface and the CPU, memory and other hardware I/O devices.
The kernel provides and manages computer resources, allowing other programs to run and use these resources.
The kernel also sets up memory address space for applications, loads files with application code into memory,
sets up the execution stack for programs and branches out to particular locations inside programs for
execution.
The kernel is responsible for:
Process management for application execution
Memory management, allocation and I/O
Device management through the use of device drivers
System call control, which is essential for the execution of kernel services
There are five types of kernels:
1. Monolithic Kernels: All operating system services run along the main kernel thread in a monolithic
kernel, which also resides in the same memory area, thereby providing powerful and rich hardware
access.
2. Microkernels: Define a simple abstraction over hardware that use primitives or system calls to
implement minimum OS services such as multitasking, memory management and interprocess
communication.
3. Hybrid Kernels: Run a few services in the kernel space to reduce the performance overhead of
traditional microkernels where the kernel code is still run as a server in the user space.
4. Nano Kernels: Simplify the memory requirement by delegating services, including the basic ones like
interrupt controllers or timers to device drivers.
5. Exo Kernels: Allocate physical hardware resources such as processor time and disk block to other
programs, which can link to library operating systems that use the kernel to simulate operating system

]]> https://www.emblogic.com/blog/06/kernel/feed/ 0 RCS https://www.emblogic.com/blog/03/rcs-2/ https://www.emblogic.com/blog/03/rcs-2/#comments Wed, 26 Mar 2014 17:11:31 +0000 http://www.emblogic.com/blog/?p=9520 Continue reading →]]> The RCS Revision Control System manages modifications to individual files. Files can be locked while checked out for change by a programmer to protect against poor coordination and comunications. Comparison with previous versions of the file and access to previous versions is also possible.

]]> https://www.emblogic.com/blog/03/rcs-2/feed/ 0 TCL FEDORA PROBLEM https://www.emblogic.com/blog/10/tcl-fedora-problem/ https://www.emblogic.com/blog/10/tcl-fedora-problem/#comments Mon, 28 Oct 2013 15:41:48 +0000 http://www.emblogic.com/blog/?p=7410 Sir, how to run tcl scripts on fedora?

I have an  example:

# tclsh hello.tcl
can’t find package Tk
while executing

I tried to install Tk package, but its not working. Please help!!

]]> https://www.emblogic.com/blog/10/tcl-fedora-problem/feed/ 0 Embedded Linux on ARM Cortex A8. https://www.emblogic.com/blog/04/embedded-linux-on-arm-cortex-a8/ https://www.emblogic.com/blog/04/embedded-linux-on-arm-cortex-a8/#comments Tue, 16 Apr 2013 18:53:31 +0000 http://www.emblogic.com/blog/?p=6372 Continue reading →]]> Embedded Linux is the use of Linux in embedded computer systems. Linux has been ported to a variety of CPUs which are not only primarily used as the processor of a desktop or server computer, but also ARM, AVR32, ETRAX CRIS, FR-V, H8300, IP7000, m68k, MIPS, mn10300, SuperH, and Xtensa processors, It is also used as an alternative to using a proprietary operating system and toolchain. Linux is an open source operating system. It enjoys support by a large group of engineers contributing back into the open source (similar process to the FSF’s GNU tools).This makes Linux a very dynamic and fast moving operating system.

]]> https://www.emblogic.com/blog/04/embedded-linux-on-arm-cortex-a8/feed/ 1 Embedded Linux on ARM https://www.emblogic.com/blog/01/embedded-linux-on-arm/ https://www.emblogic.com/blog/01/embedded-linux-on-arm/#comments Sun, 06 Jan 2013 08:59:44 +0000 http://emblogic.org/blog/?p=5729 Continue reading →]]> Embedded Linux is the use of Linux in embedded computer systems. Linux has been ported to a variety of CPUs which are not only primarily used as the processor of a desktop or server computer, but also ARM, AVR32, ETRAX CRIS, FR-V, H8300, IP7000, m68k, MIPS, mn10300, SuperH, and Xtensa processors, It is also used as an alternative to using a proprietary operating system and toolchain. Linux is an open source operating system. It enjoys support by a large group of engineers contributing back into the open source (similar process to the FSF’s GNU tools).This makes Linux a very dynamic and fast moving operating system.

]]> https://www.emblogic.com/blog/01/embedded-linux-on-arm/feed/ 0 Embedded Linux https://www.emblogic.com/blog/09/embedded-linux-for-limited-resource-devices/ https://www.emblogic.com/blog/09/embedded-linux-for-limited-resource-devices/#comments Sun, 09 Sep 2012 19:04:24 +0000 http://emblogic.org/blog/?p=5235 For design of an embedded linux if we use a microcontroller with no MMU ,then what problem we face ,

]]> https://www.emblogic.com/blog/09/embedded-linux-for-limited-resource-devices/feed/ 0 Problem in make https://www.emblogic.com/blog/08/problem-in-make/ https://www.emblogic.com/blog/08/problem-in-make/#comments Fri, 17 Aug 2012 20:18:08 +0000 http://emblogic.org/blog/?p=4853 Continue reading →]]> As i give ‘make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- menuconfig’ command after decompressing kernel, the below given error appers.

i tried with some other kernel version….but there is also the same problem…

the error have one line: /lib64/libncursesw.so.5 not found..bt as i checked this .so is present at that path…

 

/bin/ld: warning: libdl.so.2, needed by /lib/../lib64/libncursesw.so.5, not found (try using -rpath or -rpath-link)
/lib/../lib64/libncursesw.so.5: undefined reference to `dlopen@GLIBC_2.2.5′
/lib/../lib64/libncursesw.so.5: undefined reference to `dlclose@GLIBC_2.2.5′
/lib/../lib64/libncursesw.so.5: undefined reference to `dlsym@GLIBC_2.2.5′
collect2: ld returned 1 exit status
make[2]: *** [scripts/kconfig/conf] Error 1
make[1]: *** [silentoldconfig] Error 2
make: *** No rule to make target `include/config/auto.conf’, needed by `include/config/kernel.release’.  Stop.

Plz give me a solution as i am using x86_64 bit arch.

]]> https://www.emblogic.com/blog/08/problem-in-make/feed/ 0 E2&E4-Tool -chain Daily Report (17-8-2012) https://www.emblogic.com/blog/08/e2e4-tool-chain-daily-report-17-8-2012/ https://www.emblogic.com/blog/08/e2e4-tool-chain-daily-report-17-8-2012/#comments Fri, 17 Aug 2012 08:20:43 +0000 http://emblogic.org/blog/?p=4813 Respected Sir
Today entire team worked on tool chain.
Please all members from E2 & E4 provide their today’s status on blog by comment

Thanks and Regards
Dharmendra Nath Shandilya
&
Purnendu

]]> https://www.emblogic.com/blog/08/e2e4-tool-chain-daily-report-17-8-2012/feed/ 1 E-4 Tool Chain Problem https://www.emblogic.com/blog/08/e-4-tool-chain-problem/ https://www.emblogic.com/blog/08/e-4-tool-chain-problem/#comments Mon, 13 Aug 2012 07:38:53 +0000 http://emblogic.org/blog/?p=4683  

 

]]> https://www.emblogic.com/blog/08/e-4-tool-chain-problem/feed/ 12 Embedded Linux https://www.emblogic.com/blog/08/embedded-linux/ https://www.emblogic.com/blog/08/embedded-linux/#comments Sat, 04 Aug 2012 04:43:53 +0000 http://emblogic.org/blog/?p=4392 Continue reading →]]> Embedded Linux refers to a complete system, or in the context of an embedded Linux vendor, to a distribution targeted at embedded devices.

Although the term “embedded” is often also used in kernel discussions, there is no special form of the Linux kernel targeted at embedded applications. Instead, the same Linux kernel source code is intended to be built for the widest range of devices, workstations, and servers imaginable, although obviously it is possible to configure a variety of optional features according to the intended use of the kernel.

In the context of embedded development, you will typically encounter embedded Linux systems—devices that use the Linux kernel and a variety of other software—and embedded Linux distributions—a prepackaged set of applications tailored for embedded systems and development tools to build a complete system. It is the latter that you are paying for when you go to an embedded Linux vendor. They provide development tools such as cross-compilers, debuggers, project management software, boot image builders, and so on. A growing number of vendors have chosen to integrate much of this functionality into customized plug-ins for their own versions of the community developed Eclipse graphical IDE framework.

]]> https://www.emblogic.com/blog/08/embedded-linux/feed/ 1 Finally got succeed in Building toolchain. https://www.emblogic.com/blog/06/finally-got-succeed-in-building-toolchain/ https://www.emblogic.com/blog/06/finally-got-succeed-in-building-toolchain/#comments Tue, 26 Jun 2012 09:05:12 +0000 http://emblogic.org/blog/?p=3541 successfully executed ARM specific executable on BeagleBoard..:-)

]]> https://www.emblogic.com/blog/06/finally-got-succeed-in-building-toolchain/feed/ 0