Embedded Market Job Trends

Hai all ,

 i am so happy see you all once again

Right now  IT market is having lot more openings

but remember on thing those are all for experienced people


Freshers who are trying to get a job in embedded systems its really difficult task

guys have a look on the market trend  get ready with c and data structures and

linux commands and linux basic programming  .then go to market and buy 8051

 board  do all the programs with this board and get ready to buy new arm9 board like ( friendly-arm , beagle board  like that )  do some thing with these board and try for jobs  .

  damm sure you will place in some good embedded based company :)


For Exp People exp b/w 2 to 8 years

prepare c  and data structures  :D

then u will get good job yar :D

for interview questions please refer http://campusinterviewindia.com/


cheers /''\

u r s chaitu

Embedded Market Job Trends

how to port uboot and linux on arm 9 (friendly arm )

Micro2440 Instructions for U-Boot and Linux

A brief introduction about how to get started with the Micro2440 boards and u-boot.
We are going to replace all contents of the NAND flash - so make sure to have a backup if there is any valuable data on your device.

What we need

• Micro2440 SDK
• Linux PC (Windows would work as well but I'm not sure how to upload files to Vivi with it.)
• SD/MMC card
• Serial cable
• USB cable or JTAG (to replace vivi)

Replacing the Bootloader

We are going to use the bootloader in NOR flash for booting preparing the whole boot environment in NAND flash. Doing so we can create a new bad block table for the NAND flash which seems to be necessary for most of the board shipped.
We are going to copy u-boot into the RAM of the board and execute it there. u-boot will provide us all necessary features to prepare nand flash and copy itself there.

1. Use your preferred serial terminal application and connect to the micro2440 SDK board "COM-0" port. The u-boot serial console communication parameters are 115200,8,n,1. Connect the USB client (B) plug of the board with an USB port of your PC. Make sure to set the boot selection switch to the 'NOR' position before you power on the board.

how to port uboot and linux on arm 9 (friendly arm )

how to cross compile the kernel for ARM9 minin 2440 friendly arm mini 2440 for ubantu

In this tutorial, I'll quickly show you how easy it is to compile a kernel for the mini2440. If you haven't already installed git, you should do so now. In Ubuntu, you simply install the package git-core.


Setting up Your Toolchain

Follow the instructions from this tutorial.
http://chaitutechbits.blogspot.com/2010/12/how-build-arm9-tool-chain-mini-2440.html



Obtaining the Correct Kernel Sources

In order for you to get a kernel thats patched for all the hardware on your Mini2440, you need to get the kernel sources from the correct place. While it's possible to simply go and download a kernel directly from kernel.org and cross compile it, you won't get the patches included with that for all the hardware on the Mini2440.


Create a directory for your source tree and change to it and use git to clone the repository.

Code:

$ mkdir mini2440-kernel
$ git clone git://repo.or.cz/linux-2.6/mini2440.git
$ cd mini2440

how to cross compile the kernel for ARM9 minin 2440 friendly arm mini 2440 for ubantu

how build arm9 tool chain ?? for mini 2440 friendly arm micro 2440

This howto will show you how to quickly and easily set up an ARM toolchain so that you can use openembedded. You can also use this toolchain to compile the linux kernel or anything else that you specifically want to compile for the mini2440.

Download the toolchain here.



After you've downloaded the toolchain, you can untar it into your /usr/local directory or somewhere in your home directory if you don't have root access to the machine you're compiling on.

how build arm9 tool chain ?? for mini 2440 friendly arm micro 2440

how to compile u boot for arm9 friendly arm mini 2440 micro 2440 ?? what is uboot

UBoot must usually be installed in a Flash memory to be
executed by the hardware. Depending on the hardware, the installation of UBoot
is done in a different way
The board provides some kind of specific boot monitor, which allows to flash the second stage bootloader. In this case, refer to the board documentation and tools UBoot is already installed, and can be used to Flash a new version of UBoot.
However, be careful: if the new version of UBoot doesn't work, the board is unusable
The board provides a JTAG interface, which allows to write to the
Flash memory remotely, without any system running on the board. It
also allows to rescue a board if the boot loader doesn't work.

The bootloader that comes factory installed on the Micro2440 and the Mini2440 board is called Supervivi. I don't personally like it. It has very limited support and requires a YAFFS filesystem for the root filesystem. So when I bought my board I began to immediately search out an alternative. The bootloader by choice, it seems, is a modified version of U-Boot with modifications for the Mini2440 board's hardware

The code is maintained by a guy named buserror. I'll provide his information at the end of this howto.
At the time of writing this, I had some issues with getting Buserror's U-Boot working correctly.
The code that is in his git repository, doesn't run from RAM without a modification to the source. So here are the instructions that I gathered for altering and compiling it, and getting it going on the Mini2440 and Micro2440 board.
For this to work, I'm going to assume that you have a crosscompiler set up. Later on, I will probably write an entry here about setting that up, but not now. I'm also assuming you have git installed.

Step 1: Get the source

mkdir uboot ;

cd uboot
git clone git://repo.or.cz/u-boot-openmoko/mini2440.git

Step 2: Set your cross compiler prefix so you don't end up compiling this for x86.

export CROSS_COMPILE=arm-none-linux-gnueabi-

how to compile u boot for arm9 friendly arm mini 2440 micro 2440 ?? what is uboot

how build an application for arm9 . how to compile and build applications for friendly arm .

Compiling and Running Programs   With Linux and Qtopia 2.2.0



Literal translations of the original Chinese user manual are fraught with imminent peril!

In this text everything has been tested and corrected. We assume you are using the Linux

2.6.29 kernel and Qtopia 2.2.0 that ships on the Mini2440. This is tested with Debian

system on the host PC. Under Redhat or Fedora some directories might be automatically
created during uncompression of files. Making them ahead of time won’t hurt anything.
Setting up the gcc cross compiler.
The current version (Aug 1009) of the FriendlyARM software uses the arm-linux-gcc-
4.3.2 compiler for everything from the boot loader to Qtopia. The compressed compiler is
in the /linux directory of the DVD. Copy it to a convenient place like /tmp. You will need
to be the super user to do this. Then untar the

$ su [root password]
# cd /tmp
                                                              (with a capital ‘C’)
# tar xvzf arm-linux-gcc-4.3.2.tgz -C/
If this fails, make the directories first.
# cd ..
# mkdir /usr/local/arm
# mkdir /user/local/arm/4.3.2

how build an application for arm9 . how to compile and build applications for friendly arm .

ARM9 Processor Introduction with video Lecutre

 The ARM is a 32-bit reduced instruction set computer (RISC) instruction set architecture (ISA) developed by ARM Holdings. It was known as the Advanced RISC Machine, and before that as the Acorn RISC Machine

Basic ARM9 Structure :-

ARM9 Processor Introduction with video Lecutre