Brett Hutley's Blog » technology

Hacking the EZ430 Chronos Watch on the Mac

brett — Mon, 23 Jan 2012 21:15:08 +0000

Today my TI EZ430 Chronos Watch arrived, and I spent a little bit of time hacking it on my MacBook Air. It turns out that even though the documentation seems to require either a Windows machine or a Linux box, you can communicate with the watch from the Mac by modifying the serial port information in the TCL source. I learnt this from a Google Groups post, and I've copied the modified TCL source onto my Github account.

I then tried compiling the OpenChronos source code to build some custom firmware. In order to build the firmware, I had to install the following Mac Ports:

sudo port install msp430-gcc
sudo port install msp430-binutils (actually is probably installed with msp430-gcc)
sudo port install msp430-gdb
sudo port install msp430-libc

I then did a msp430-gcc -print-search-dirs to find out where msp430-gcc include files were. For me they install to the /opt/local/msp430/include/ directory. Following the Readme for OpenChronos, I did a sudo cp gcc/intrinsics.h /opt/local/msp430/include/.

When I tried compiling OpenChronos, the build failed with lots of warnings and quite a few errors. This is because OpenChronos was built using the older msp430-gcc4 project. I fixed the compiler warnings/errors and built an image. I copied the generated build/eZChronos.txt file over to my Chronos-Control-Center directory, and uploaded the image to my watch. Everything seemed to work OK, and the watch is currently running my newly compiled custom firmware!

My modified OpenChronos source is available from GitHub.

Developers as Capital

brett — Tue, 06 Dec 2011 14:43:01 +0000

I've just been reading this Forbes article called "The Rise of Developeronomics". The author argues that because increasingly software is the core value proposition that differentiates companies from each other, that software developers are more and more becoming the wealth creators in society. The author recommends investing in software developers as a way of leveraging your own capital. This article builds on an earlier article by David Kirpatick called "Now Every Company is a Software Company".

The article is making the point that programmers are becoming a core economic factor for successful companies, so much so that large companies are buying smaller companies purely for their programming teams. He points out that companies such as Google nurture young programming talent as a strategic investment.

Of course the message is hugely appealing to me as a software developer. My own opinion is that technology is exponentially increasing the potential "value space" for possible investment. For example, consider the introduction of Facebook. With that particular advance in social networking, it opened up all sorts of opportunities for individuals and companies to promote themselves and establish new kinds of dialogues with their clients. With this advance, a large number of opportunities were created, which in turn leads to more specialised development that wasn't possible before the large-scale take up of social networking. Thereby creating a lot more potential work for a larger number of programmers.

If companies don't keep up with the introduction of new technologies, they run the risk of falling behind their competitors. Not only those competitors who are able to utilise technology to make their workers more productive, but also those competitors that make better use of social networks and internet search to gain new customers and retain older ones, and data modeling and analysis to determine new markets and optimise existing ones. It seems to me that not only are developers the creators of wealth, but we are currently living in a technological arms race.

IMAP4 and Python

brett — Wed, 30 Nov 2011 13:46:59 +0000

Python's IMAPv4 client library imaplib is a really light-weight wrapper over the IMAP4 protocol. As such, it isn't that intuitive to use. The best reference I've found on it is a cheat-sheet over here.

Basic usage is to create a IMAP connection object, using the imaplib.IMAP4() or imaplib.IMAP4_SSL() functions. Login to the server. You then select() a mailbox and search() within it to retrieve messages. If the search was successful, it will return a tuple with the first element being "OK", and the second element is an array with the first item being a list of matching message identifiers. Each identifier can be passed to the fetch() command.

Search queries look like '(FROM "person@server.com) (SUBJECT "Coolio")'. You can also use ALL, OR, and NOT operators.

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Getting iTunes to recognise tracks as belonging to one Album

brett — Sun, 27 Nov 2011 15:26:03 +0000

I have just been importing some music into iTunes from an external drive. Sometimes iTunes doesn't recognise songs as belonging to the same album, even if they have the same Album name.
(Bad iTunes!)

The solution is to select all the files in iTunes that belong to the same Album. Right-click and choose "Get Info" from the menu (you may get a warning here that you are changing multiple items). You should see them as all having the same Album name. If they don't then edit the "Album" field with the name of the Album. Secondly, set the "Album Artist" field to be "Various Artists". If you click OK, you should now see the music in iTunes shown as being part of the same Album.

I quite often then go to the "Options" tab, and set the option "Part of a Compilation" to be "Yes", and because a lot of my music tends to be electronica and dance music, I also set "Gapless Album" to be "Yes".

Great Quote

Bio-Monitoring and the Jawbone UP

brett — Thu, 24 Nov 2011 14:06:56 +0000

I just picked up my Jawbone UP from the Post Office last night, so thought I'd post my first impressions.

Firstly, the wristband is pretty awesome. Mine is black and is made out of a rubbery plastic that feels really comfortable. The wristband itself is supposed to be water resistant so you can wear it in the shower. At one end of the wristband is a metal cap which, when removed, reveals a mini-jack plug for plugging the band into your iPhone. The other end is a button, that switches the band into measuring different types of activities - exercise, walking and sleeping.

To get your activity data with your iPhone, you need to plug it into the audio socket of the phone and press the button to sync. So far this hasn't been too onerous, but I can imagine it being a little bit of a pain eventually. The iPhone app allows you to track your time spent exercising, your movements and sleep patterns. You can get it to vibrate if you have been inactive for too long, or to wake you up in the morning.

Overall, I'm really excited about this technology. It's had a bit of a negative review here, but I think the Jawbone UP is going to be great to play with!

Rewiring the Brain

brett — Mon, 14 Nov 2011 14:18:40 +0000

There is an absolutely awesome bit of Neal Stephenson's book Reamde, that goes like this: The brain "was sort of like the electrical system of Mogadishu. A whole lot was going on in Mogadishu that required copper wire for conveyance of power and information, but there was only so much copper to go around, and so what wasn't being actively used tended to get pulled down by militias and taken crosstown to beef up some power-hungry warlord's private, improvised power network. As with copper in Mogadishu, so with neurons in the brain. The brains of people who did unbelievably boring shit for a living showed dark patches in the zones responsible for job-related processes, since all those almost-never-exercised neurons got pulled down and trucked somewhere else and used to beef up the circuits used to keep track of NCAA tournament brackets and celebrity makeovers."

In the silicon.com post "Your brain vs technology: How our wired world is changing the way we think", Baroness Susan Greenfield is quoted, professor of Synaptic Pharmacology at Lincoln College, Oxford: "If the human brain is exquisitely adapted to the environment, which it is, if the environment is changing, which it is, then it's a given the brain will change". She is concerned by how our brain changes as a result of increasingly spending our time in front of technology, that areas of the cortex may be going dark as we spend our lives immersed in Big Brother and Facebook.

It seems to me that in order to get good things out of our interactions with technology, we should focus on how we can use our screen time to exercise areas of our brain in ways that wouldn't normally happen.

A good example of this was a recent post on Scientific American called "In the mind of others - Reading fiction can strengthen your social ties and even change your personality". This article is about research that indicates how reading fiction may help social interaction by building experience on how to interact with other people, without physically interacting with other people. As people empathise with characters in the book and those characters relate to other characters in the story, they build up this mental database on how to behave. This mental database helps with later, "meat-space" interactions.

I remember reading related work on using virtual reality to overcome phobias through repeatedly experiencing a fear-inducing situation in a safe, virtual environment.

Is it just our thinking and behaviour we can affect through computer interaction? The BBC had a news story about how a virtual gym could help with weight loss which suggests that maybe our virtual experiences also affect our body. What are the limits for this? This sounds like a wonderful area to explore. How can we re-wire the brain in beneficial ways using our computers?

Were the Luddites Right?

brett — Mon, 07 Nov 2011 13:36:14 +0000

The Luddites were a 19th century anti-industrialisation movement (and militia), who believed that their jobs were at risk because of the industrialisation of manufacturing. They proceeded to try and destroy mechanical looms in a vain attempt to turn back the rising tide of industrialisation. These days anyone seen as a "Luddite" is perceived to be backward and anti-technology.

But were the Luddites right about the consequences of technological progress? The Luddite Fallacy states that the argument that technological progress decreases the amount of jobs is fallacious, because increases in productivity does not mean that employers will keep their production constant. Rather, employers will increase their production to suit available demand.

The Economist has a post that points out that the Luddite Fallacy is only a fallacy as long as new technology increases capital, without reducing the need for human labour. But what happens if technology increases the capital and replaces the need for unskilled human labour?

The Luddites may have been a revolution or two short of the mark, springing from the industrial rather than the computer revolution, but maybe they weren't wrong about the long-term consequences of technological progress, believing that it would destroy jobs, and cause greater income inequality. Smashing the looms is obviously not a solution to the socio-economic problems of the structural changes to our society, but neither is burying our heads in the sand.

Race Against The Machine

brett — Sun, 06 Nov 2011 15:52:11 +0000

I just finished reading the Kindle book Race Against The Machine, a book I thoroughly recommend. This was the driver of the NPR article I blogged about recently.
The book is mostly oriented towards the US, although the issues they discuss seem to be prevalent across all major economies. The authors make the case that technological improvements are severely impacting every job market except those for highly-skilled individuals.

They argue, as I have argued, that the current employment crisis is caused by structural factors such as increased productivity due to technology, rather than cyclical or stagnation factors. We are simply living in a world where the educated and skilled are able to contribute to the economy in a disproportionate way, and the less educated/skilled are forced to compete for the fewer and fewer jobs that are currently too expensive to automate. This leads to money flowing from the workers to the owners of the business, which is an unsustainable situation for the long term.

The authors point out that to a large extent, we operate in a "winner take all" society. Technology enables the best and fastest-moving in the business to capture the bulk of a market. That in turn provides a strong incentive for those with capital to further invest in technology, creating a self-perpetuating cycle. Not only is this situation self-perpetuating, but increased capital allows winners a disproportionate advantage in the race to take advantage of another business opportunity.

The positive news is that as we use technology to expand the frontiers of innovation, this will in turn create an exponential increase in the possibilities for further innovation.

Written by Robot

brett — Fri, 04 Nov 2011 13:58:01 +0000

I've just read two blog posts on creating written content programatically. The first was the article How I automated my writing career by Robbie Allen. This article gives a brief description of how the author's company generates web-site content automatically using the quantitative analysis of data.

The second blog post is about generating a Monty Python parody using markov chains. Even though the code is very simple, it generates very convincing nonsense!

How long will it be before the prose in our stories, the plots on our TV series, the lyrics in our songs are all machine generated?

How Disqus does scaling

brett — Wed, 08 Sep 2010 19:52:02 +0000

Here is a great presentation given by Jason Yan and David Cramer of Disqus fame about how their site was architected in order to scale to handle 75 million comments.

DjangoCon 2010 Scaling Disqus

View more presentations from zeeg.

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