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If you can keep your head when all about youÂ
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you,
But make allowance for their doubting too;
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
If you can dream - and not make dreams your master;
If you can think - and not make thoughts your aim;
If you can meet with Triumph and Disaster
And treat those two impostors just the same;
If you can bear to hear the truth you've spoken
Twisted by knaves to make a trap for fools,
Or watch the things you gave your life to, broken,
And stoop and build 'em up with worn-out tools:Â
If you can make one heap of all your winningsÂ
And risk it on one turn of pitch-and-toss,
And lose, and start again at your beginnings
And never breathe a word about your loss;
If you can force your heart and nerve and sinew
To serve your turn long after they are gone,
And so hold on when there is nothing in you
Except the Will which says to them: 'Hold on!'
If you can talk with crowds and keep your virtue,
' Or walk with Kings - nor lose the common touch,
if neither foes nor loving friends can hurt you,
If all men count with you, but none too much;
If you can fill the unforgiving minute
With sixty seconds' worth of distance run,
Yours is the Earth and everything that's in it,
And - which is more - you'll be a Man, my son!
As time flies by, we age a little every year. This year being no different, I turn 22.Â
22 years of growing up. 22 years of interacting with people. 22 years of having seen things go by and trying to formulate an opinion of my own. 22 years of being curious to find out what I love. 22 years of having learnt some minute amount of stuff.
Most importantly, today I am grateful of the last 22 years of life. Thankful to everyone I met on the way to help me be what I am. Good, bad, ugly - thanks for your share of experience.Â
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So having not written any post since the last few months as I sit here in my office here I decided to 'Penn' down my thoughts about whats transpired in the last few months.Â
1. College end
So college ended! Woah! I mean college was supposed to be the biggest thing which mattered to me ever in life till then and then suddenly you end on a full stop with nothing to look beyond. But more troubling than ending college was the fact that a particular night made me realize that I virtually stand alone in the world out there, friendships never get out in the real world. You won't have people sticking with you ever. College wasn't really the best investments of time I made in life. So point noted. Moving on ...Â
After helping my mom with a bunch of her career guidance startups (built couple of RoR and JS apps) , I decided to go for a much needed break to the parvati valley just to clear my head of everything happening in the 'middle earth'. The most epic trip of my life till date. I leave you with a couple of photographs,
Hope you see the rainbow in the waterfall there! Nature can never cease to surprise you..
The trip did irk a few people. But then, my time in India was already over. People live on their own preconceived notions which I am no-one to go and change. All the best with that.
2. Freelancing.Â
1. Rooting and developing a custom ROM for a Chinese Android Netbook.Â
The rooting was pretty straightforward. Developing the custom ROM did take me atleast 4 days straight. All in all a really really good experience.Â
Link of the final custom ROM : https://www.dropbox.com/s/zoaoy4eva7jxvps/final_v4.zip
2. Rooting the iBall 3g 9728 (http://www.iball.co.in/Product/3G-9728/522)
This was good experience too. Took me about a complete day to figure out everything about the tools. This is the flagship device of iBall. So, nothing like rooting it and understanding its internals!
Here is a link to all the tools :Â https://app.box.com/s/xhzoreruze36nzd63ipo
To root the tablet use, SRSRootSetup.exe - its a chinese program, make sure you click the big green button on the right when rooting the application.Â
To extract the ROM from the device, use the MTK droid tools and make atleast a few backups. The backups of my device are inside the MTKDroidTools/backup folder. Make sure you do the same for your device first, or just make multiple copies of mine!Â
The iBall 3G 9728 has a MT6577 processor. So you need the USB drivers for that too. Its there in the tools! :) Be sure to run a benchmarking suite on your device to make sure your processor is the same!
3. UPenn
So I joined the Fall program of the EMBS graduate program at the University of Pennsylvania, though it really wasn't my top choice. As it turns out, I am here in Philadelphia trying to juggle my awesome courses! Its been a pretty splendid month so far. Getting a TA early on, has been great! I love my database class going on. Heres a thanks to Pranav, Varun, Rohit and his brother, Neel, Arun, Karan, Udit and prabhjot to have helped me settle in initially.Â
I still gotta buy a good phone, expect pictures next time! The girls I tell you!
So thats me checking in on my blog. I will be sure to write back early..
Writing Software is easy, writing Software targeting a specific hardware can be pretty daunting. Daunting in terms of setting up your development environment, which compiler to use, what do the numerous compiler flags mean, how the linker comes around and its role in mitigating all those 'undefined reference' tags among other things. Â
I had a very basic understanding of C and some practical experience on the Arduino. Starting off with ARM was no joke, i didn't really sleep comfortably for too many nights in a row. For me understanding how the things fit in the big picture of having that LED blink is more important than that content feeling one gets after seeing the same. Flashing the code onto the board and seeing it run is easy, there is more than sufficient documentation online and follow any of those tutes and you'll find your way through. I suggest you do that if you would like to right now, this post tries to put things in perspective for a Beginner in embedded software and in a way helps me put down everything on 'paper'. Also, i am no embedded Software God.Â
Step 2. Once you have chosen your toolchain its important to give a read to its documentation and find out what things are what in it. How do i invoke the compiler, linker and assembler, what are the roles of these different tools, and how can i inter-convert between the final executable file format i am targetting. Read this. and this. Knowing a few compiler flags and their purpose is important.Â
Step 3. Get your C right. Since most of embedded development happens on C its good to run through a C refresher course on the side while you are doing steps 1 and 2. Basics of C, including Structures, Pointers and functions calling is important. Don't forget reading about the role of .c and .h files in any code. Small things go a long way in avoiding a lot of frustrating moments ahead. See this and this.
Once done, I would recommend using Eclipse (C/C++) as an IDE and integrating all of your stuff there. By stuff i mean integrating all your source code and compiler. You'll need to install an Eclipse plugin also for integrating your toolchain with the IDE. So now, here is a brief description of some generic steps you'd follow to set your own generic microcontroller development environment,
File -> New C Project, gets you this,
Click on 'Finish' on the next screen.Â
Once done, you need to get into the details and open the properties of this project. This will be screen under C/C++ Build,Â
Define your compiler symbols under Cross GCC Compiler -> Symbols.Â
Include your Compiler Include paths under 'Includes',Â
Set optimizations in the link under 'Includes'.Â
Set all your other compiler specific flags under 'Miscellanous'. This is what i set for building Stellaris TI ARM based Microcontroller code,
I leave finding out the meaning of all these flags to you. The compiler documentation covers them.Â
You now need to enter the location of the linker file and any libraries (with paths) which your code would use. To define the location of the linker file, look under the Miscellaneous tab under Cross GCC LinkerÂ
Define the libraries under the 'Libraries' section. Its important to understand what libraries are and how they help in the linking process. Libraries are basically an archive of the object files created during compilation. You do not need to include the source of the functions if you are including the libary directly into your code.
Thats it you are done. This is the generic way of building code targeting hardware.
Just build to generate your hex file. Check out the tool arm-none-eabi-objcopy to interconvert different file formats depending on the tool you use to burn the code onto your board.Â
It was a couple of weekends back that i decided to finally make a web-app for my lab. The aim was to build a simple web-app which listed all the electronic components we used and also kept track of what we had in stock and what we didn't.Â
Knowing the destination i decided to sit down on a saturday night and code it up up through till Monday. So, since i graduate in about 80 days i decided to give back a simple good looking 'easily editable' web-app rather than a sucked-up HTML page. This is what i ultimately ended up making. (patience, free heroku accounts are slow). Here is how i did what i did,Â
Front-end -Â Twitter BootstrapÂ
Nothing can beat the ease with which this gets you into business. And all this at with that sexy-cum-clean look. Best for throwing in stuff for prototypes and quickies.
Back-end - Rails (yeah the Ruby one)
I did go over all the Ruby and Rails structure over my last winter vacations. Reason - Inquisitiveness. It was just that there was so much talk about it. I just had to get my hands dirty and find out what the mess was about. Post End Semesters and my Graduate Applications i had plenty of time on me, so i decided to learn a few tricks of the trade.
Rails works on a MVC (Model-View-Controller) Architecture. You'll need to understand what goes into each folder and how databases, models and attributes are set and everything. Best to go look up some full tutorial on this. I will be making use of the Postgresql database as it most conveniently puts up with heroku.Â
Step 1.Â
Landing Page
https://gist.github.com/anonymous/5235801
Main Page
https://gist.github.com/anonymous/5235817
Don't worry about the <html>, <head> and other tags, they along with the necessary javascript files are added to these files. Look up <rails-project-directory>/app/views/layouts/application.html.erb, <rails-project-directory>/app/assets/javascritps/application.js <rails-project-directory>/app/assets/stylesheets/application.css. (After you've created your rails project)
Its important that you read the basic rails app structure and download the twitter bootstrap files to the necessary locations before you attempt to get these pages running. Look up the stylesheets and javascript directories again, you'll know what i am talking about.Â
Don't worry about the <% and <%= . <% %> is used to embed ruby code. <%= %> signifies that the code embedded should output something on to the html page.Â
Now onto Rails,Â
Create your Rails app with
rails new partlister --skip-bundle --database=postgresql
Install the Postgresql prerequisites and make sure you create three different databases for each the Development, Testing and Production stage. Here is how i create them,Â
su postrges #Switch to postgres account
psqlÂ
create DATABASE partlister_development;
create DATABASE partlister_testing;
create DATABASE partlister_production;
ALTER DATABASE partlister_development OWNER TO cuil; #For changing the owner.Â
ALTER DATABASE partlister_testing OWNER TO cuil; #For changing the owner.Â
ALTER DATABASE partlister_production OWNER TO cuil; #For changing the owner.Â
\q #QuitÂ
After making these databases, edit you database.yml file inside the <rails-project-directory>/config/ location. Also remove your index.html page from the <rails-project-directory>/public location.Â
Everything else (Models, Controllers) and more(Heroku deployment, Rake, Rails Admin) in the next tutorials.
Setting up the Stellaris Guru Development Environment
This blog post describes the process of setting up the Stellaris Guru Development Enviroment for programming the Stellaris Guru.Â
  Note: Operating System used is Windows XP/Vista/7 (setting up eclipse and the toolchain integration with the IDE would be pretty much the same on linux)
The tools required to set up your tool chain are:
The Eclipse Integrated Development Environment Indigo (IDE)
Java Runtime Edition (required by Eclipse IDE).
Codesourcery G++ Lite cross compilers.
GNU ARM Eclipse Plugin.
Stellaris Peripheral Driver Library
LM Flash Programmer
FTDI Driver for USB-Serial interaction with the target board.
Setting up the toolchain
To successfully set up the Integrated Development Enivironment (IDE) follow the steps documented below.Â
Downloading the Software tools,
1. Java:Â Install Java from the link.
2. Eclipse IDE: Download Eclipse from the link and extract to a suitable location.
3. GNUARM Plugin for Eclipse: Download the plugin from the link.
 4. Stellaris Peripheral Library + FTDI Drivers + LM Flash Programmer: Download the âStellarisWare Driver Library Standalone Packageâ, âStellaris FTDI driverâ and the âLM Flash Programmerâ from this link.  Install the .exe under âC:\StellarisWareâ. Install âLM Flash Programmerâ under âC:\Program Filesâ.
5. CodeSourcery G++ Lite: Download the âSourcery Code Bench Lite Edition EABI Releaseâ from this link. Install the .exe under âC:\Program Filesâ. Registration required.
6. FTDI USB Serial Driver: Download the âVCP Driversâ for supported Architecture from this link.Â
Setting up Eclipse and LM Flash Programmer
i) Launch the Eclipse IDE. A window similar to that shown will come up,
ii) Installing the GNU ARM Plugin
Go to Help -> Install New Software -> Add -> Archive
A window similar to that shown in below will show.
Browse to the GNUARM plugin zip file downloaded earlier.
Click Ok and Next to install the plugin.
A window similar to that shown will show.
iii) Creating your first project
Go to File -> New -> C Project.
Enter the project name. Make sure the selections are as shown below
Click Next.
Enter the Project Name as shown.
Then, press Finish.
iv) Importing the existing file system.
Go to File -> Import -> General -> File System.
A window similar to that shown below will come up.
Press Next.
Browse and select the any project from the lm3s608 folder (Source Code for your project). Make sure same option as shown in figure are selected. Press Finish.
So till now, we have set up a new project and instructed the Eclipse IDE as to what cross compiler to use for development. Your screen should look similar to that shown in Figure below.
v) Setting up project properties
Go to Project Properties.
Under Settings -> Tool Settings -> ARM Sourcery Windows GCC C Compiler -> Directories. Include the directory paths as shown below.
Choose cortex-m3 as the processor
Assembler Flags
'gcc' is the defined symbol used
Include the location of the codeÂ
-ffunctions-sections parameter required
Set the Linker location and options
Static Library for the linker
Paths and Symbols
Add arm-none-eabi-objcopy -S -O "${ProjName}.elf" "${ProjName}.hex" to Post-Build Steps
And yes! You are ready to fire up your main.c and code away. To compile, just build. Get the hex file being built, Don't let those many lines running in the eclipse console cause you to worry.Â
Use the LM Flash Programmer to burn the file to the board. You can integrate the LM Flash Programmer with Eclipse using the External Tools Configuration.Â
Go open the external tools configuration, Run -> External Tools -> External Tools ConfigurationÂ
Double click Program to configure a new external tool. Fill in as shown in the next figure. Make sure you choose the correct location of LMFlash.exeÂ
Now, these steps need not be repeated everytime you create a new project. Just create a project_template once, and the next time you want to create a new project just make a copy of project_template, rename it and change the location of the linker file in the project properties.
Next up, configuring OpenOCD with eclipse for debugging with linux.
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Excerpt from the speech "Citizenship In A Republic" -Â Theodore RooseveltÂ
delivered at the Sorbonne, in Paris, France on 23 April, 1910Â
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat. "
Its been more than a month since i last migrated from my previous site at Google Site. A post due for a long time.
I thought this would perhaps be the best time to write an entry describing how i migrated to this website and how i host it.Â
Why jump the Google Site Ship ?
I love Google and probably all its services, but the Google Site section sucks. I completely fail to understand how they have such a restrictive framework. The ease of Web hosting no doubt, but seriously, that thing feels like a cage. There are only selected  templates firstly, no doubt you could remix them, but then the main components inside each of them still remain the same. Earlier instances of using the framework for deploying sites were bad. So bad, that infact they portrayed the web-developer as a bit of an old-cranky non-imaginative fellow. Enough was enough, i decided to create something using something different.Â
What to choose ?
Since a static website as such doesn't require a lot of resources, I had various choices for customizing my web presence,
Custom website run from
  Home Linux Web-server
   Google App-Engine
   Heroku
Or pre-built templates from sites like,
Wordpress
Tumblr
Twitter what ? Twitter Bootstrap..
Fed up with the restrictions that Google Site offers, i decided to write my own custom HTML, Javascript, CSS code for my website. A quick search around for libraries and frameworks to help me grow over a layer of abstraction led me to something mindblowing, Twitter Bootstrap. A complete set of HTML, Javascript, CSS files with customizing options seemed perfect to have substantial control over the UI with ease of maintaining my personal space. An effort for a good 2 days had me running my first version, just a brief intro with a small picture and the resume/projects page. Some other resources which can help you out with designing include,Â
http://jetstrap.com/
http://news.ycombinator.com/item?id=3675783
http://colorschemedesigner.com/
http://builtwithbootstrap.com/
http://bootsnipp.com/resources
Buying a domain name
Eager to put up my 'thing' online i decided to look for domain names. Drapache an app for Dropbox turned out to be a perfect refuge for about 2-3 days. Ever since, shan.drapache.com is where i try out my web application first. Frustrating with the site loading delay i decided to buy my own custom domain name for Rs. 600 from BigRock, primarily from them because of the freedom they offer in DNS Management. www.shanjitsingh.in is where i have been ever since.Â
Hosting the site
Having the domain name obviously didn't solve the site loading delay problem. I needed a better hosting service and BigRock seemed expensive when it came to buying web space. I decided to use the Google-App engine (Project remains! i used this earlier in a project) for starters. shanjitsingh.appspot.com was born. What i loved about this service was the ease with which the content could be uploaded be it on Linux or on Windows. Google-App Engine provided a substantial time for me to concentrate on my studies and finish with my mid-semester exams. A post-exam analysis of the site and especially of the scalability of the site made me realize the quota limitations the site could face. I decided to look for something better. I stumbled upon Heroku next, after quick refresh of Ruby, i decided to host it online on shanjitsingh.herokuapp.com (deleted). It was then that i realized that my own Github account can serve as my hosting space for my personal site. Born shanjit.github.com. I have maintained my site on github ever since, using a Git for version control is a boon.
The Blog ?Â
Having done so much, i decided i would better transfer my earlier writings from https://www.sites.google.com/site/cuilyahoo/ to something better to go with the current website. Wordpress seemed a great alternative, but Tumblr came with more customizing capability. I decided to transfer everything here. Pretty soon, Tumblr started rolling out Twitter Bootstrap templates for their sites. Picking immediately on it, i decided to use my site theme with the blog. A 15 minute job with the online-editor had my custom-UI blog ready. I now made blog.shanjitsingh.in to point here. Use Disqus for comments.
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