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Type: Posts; User: pems

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  1. Replies
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    I haven't been around embedded prototyping for...

    I haven't been around embedded prototyping for all that long and after couple of attempts soldering 0.5mm pitch LQFP 48/64 had so far been a breeze for me, even with no magnifying glass whatsoever. I...
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    I vote for cheap and low power wireless...

    I vote for cheap and low power wireless communication device that one can attach to micros like propeller and make them talk or create a communication network.
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    if you plan to feed only 5v, i'd think you need...

    if you plan to feed only 5v, i'd think you need to use something called a "very low dropout" linear regulator. One i am successfully using for 5v->3.3v regulation is this one: LD29080DT33R from ST...
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    ...or redirect the high voltage from an ignition...

    ...or redirect the high voltage from an ignition coil to the driver's seat http://forums.parallax.com/images/smilies/freaked.gif
  5. last time i read that thread, code protection was...

    last time i read that thread, code protection was promised for Prop2

    i agree it would be nice to have some dedicated silicon for SPI. I implemented a slave SPI code (and posted it in this forum)...
  6. no, no apology is necessary :) just wanted to...

    no, no apology is necessary :) just wanted to make sure my request is reasonable (in terms of cost/benefit for the community)

    wholeheartedly understand the limited time/effort thing
    just at the...
  7. i guess the below is out of consideration?

    i guess the below is out of consideration?
  8. Hi Brad I have yet to try your tools, but i...

    Hi Brad

    I have yet to try your tools, but i just though of a feature for you that would be very handy for pasm optimizations: Preprocessor commands for automatic loop unrolling (not sure if...
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    indeed Rich that's a shortcoming. I guess this...

    indeed Rich that's a shortcoming.
    I guess this binary piece of info can be obtained from some cheap radar type of solution (something that would sense reflecting off the ground)
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    pun intended, i presume ;) Never had...

    pun intended, i presume ;)

    Never had experience with paste, ovens and reflow. Tried soldering .50 pitch LQFP64 and was amazed how easy it is with a decent iron and a soldering wick. I didn't even...
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    thanks for commenting Phil This is exactly how...

    thanks for commenting Phil

    This is exactly how i see it and here is why i think it will work:
    When the bike is upright and standing still (or going along straight line), the only force is...
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    Hi I am just curious why my proposition wasn't...

    Hi

    I am just curious why my proposition wasn't considered? I though about it some more and it really does seem like it would work well (according to my grade 8 physics diagram). Just put some...
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    Ok here is the code. I've optimized it to run...

    Ok here is the code. I've optimized it to run seemingly error free @ about 1.125Mhz SPI clock
    things could be unrolled further (resulting in huge mess) but i think the bottleneck will still be the...
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    Ah Phil, you really had me going there "What?...

    Ah Phil, you really had me going there

    "What? the mighty Phil is stuck in pasm and asking for help?! no way"
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    interesting problem i though about it a bit,...

    interesting problem

    i though about it a bit, and i think you can estimate the tilt angle with just 1 Axis accelerometer.

    here is how:
    1. fix the accelerometer with the axis pointing up/down. ...
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    SPI Slave implemented on prop

    Just curious if there is any prior art for implementing an SPI Slave on a prop

    In my continuing efforts to come up with a framework of marrying a prop to another MCU, i've implemented a simple yet...
  17. Indeed it is a shame how such a great forum could...

    Indeed it is a shame how such a great forum could reside on such crappy host (i constantly have problems with connection, other sites work fine, so it's not my connection/provider) and have such...
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    That's the reason for CAN transceivers ...

    That's the reason for CAN transceivers http://forums.parallax.com/images/smilies/burger.gif

    I have read a bit about CAN operation and it didn't look like something impossible for a prop, even...
  19. Thanks Cluso you've just saved me a bunch of...

    Thanks Cluso

    you've just saved me a bunch of hub ram http://forums.parallax.com/images/smilies/wink.gif , as i was going to pad each pasm chunk to get 2k overall size. You're right that padding...
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    Thanks a bunch Ariba

    Thanks a bunch Ariba
  21. Hi Owen lack of your own interest or...

    Hi Owen



    lack of your own interest or interest from community ? If the latter, you are in luck http://forums.parallax.com/images/smilies/wink.gif cause i really need a linux tool to generate...
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    yes, i am very happy. weekend well spent! ;) ...

    yes, i am very happy. weekend well spent! ;)


    I have another COGINIT question for gurus: i know it's a hub instruction: Is it guaranteed that when the COGINIT returns, the cog is up and running...
  23. Need ideas: bootloading prop from another MCU

    Hi all

    I mentioned this subproject of mine before, but i have reached an important milestone in it this morning, so let me lay it out for you so you can give me your suggestions and feedback
    ...
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    My thoughts exactly. I am really hoping there is...

    My thoughts exactly. I am really hoping there is going to be another such contest next year.
    Good projects take time.
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    I agree that a prop would probably make a very...

    I agree that a prop would probably make a very nice gui backend for other MCUs.
    I was recently inquiring about a possibility of using prop as a vector graphics accelerator, not just a video backend ...
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