ez430 chronos – Turn on display using accelerometer

October 24, 2010 at 9:58 pm | Posted in ez430 chronos, idea, MSP430, My Projects | 5 Comments

This is my first attempt creating a simple application for the ez430 Chronos watch.
I was trying to find out how to use the provided sample codes from TI using the Code Composer.

So, I had a simple idea to turn on/off the display depending on the orientation of the watch using the built-in accelerometer.
This application is a modification of the sportwatch sample application.

I know, I know. This is not so power efficient.
Look at the Estimated Battery Life from TI manual above, whoa… I would drain the battery in one and half months for continuous acceleration measurement. This simple application of mine is simply not practical using this watch.
But hey…, the idea is simple and it is a start to develop more complex application.



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  1. Hi

    I wonder is there any chance to get the source code?

    Thanks in advance

  2. Nice post !
    Here’s a quick and slightly advanced Hello World example, that deals with how to display some scrolling text on the watch itself:


  3. The estimate of 1.5 months is for _continuous_ accelerometer usage. For your planned application it would be sufficient to only wake up say 5 times per second and check for a change in orientation. That should give you a battery life of 1-2 years or so.

    • Yep, true. Thanks Marco.

  4. hey there where can i find the sourcecode pls ?

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