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Microcontroller options Onesupermanone 05-25-2007
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Posted by dan michaels on May 27, 2007, 11:27 am
> > If I recall correctly, "ND" is a digikey moniker and originally
> > stood for "No Discount". These days it just means it is a Digikey
> > part number. The "20PU" stands for 20Mhz in a "28P3" or 28-pin
> > plastic .30" skinny DIP. A good choice of part. Before you know
> > it, you and your friends will be buying them in tubes of 25 to
> > get them at the $1.69 price point.
> No doubt. :)
> > Not got give you buyers remorse, but I am about to add AVR's
> > to my bag of tools and have been hunting around for AVR programmers.
> > The AVRDEVKIT1-ND is a combination of the ATSTK500 and the
> > ATAVRDragon from Digikey at $49.00. It is supposed to be a
> > combined programmer and debugger.
> That's OK. I knew this wasn't a debugger when I bought it, and I'm
> assuming that if I stick with AVR development, it won't be the last
> programmer I buy. But I think it's a good starter unit -- it saves me
> from the temptation to try and figure out debugging while also figuring
> out the rest of it!
> Best,
> - Joe


Joe, didn't you try the AVR Butterfly, at $19.99 from Digi-key? If so,
what was your experience programming that, regards available tools and
development environments?



Posted by Gordon McComb on May 27, 2007, 11:59 am
Joe Strout wrote:
> That's OK. I knew this wasn't a debugger when I bought it, and I'm
> assuming that if I stick with AVR development, it won't be the last
> programmer I buy.

I'm on my fourth myself. I actually still use the first one I ever got,
an STK200, out in the garage for some things.

-- Gordon

Posted by Joe Strout on May 28, 2007, 10:57 pm

> Joe, didn't you try the AVR Butterfly, at $19.99 from Digi-key?

Yes (though I got mine through the kindness of Dennis Clark).

> If so, what was your experience programming that, regards available tools and
> development environments?

I never managed to get anywhere with it. I even posted to the avrfreaks
forum, but nobody there had much in the way of specific advice. But to
be fair, I was extremely short on both time and money at the time, so I
was attempting to use the bootloader but lacked sufficient time to
figure out how to do so.

Now that I've got an AVR-ISP2 on the way, I'll probably get the
butterfly out again. And once I've figured out how to program it with
that, I may take another stab at the bootloader. Especially considering
that I think I have brickedthe Coridium ARMmite board I was planning to
use as the brain of my firefighting bot...

Best,
- Joe

Posted by dan michaels on May 29, 2007, 9:40 am
> > Joe, didn't you try the AVR Butterfly, at $19.99 from Digi-key?
> Yes (though I got mine through the kindness of Dennis Clark).
> > If so, what was your experience programming that, regards available tools and
> > development environments?
> I never managed to get anywhere with it. I even posted to the avrfreaks
> forum, but nobody there had much in the way of specific advice. But to
> be fair, I was extremely short on both time and money at the time, so I
> was attempting to use the bootloader but lacked sufficient time to
> figure out how to do so.
> Now that I've got an AVR-ISP2 on the way, I'll probably get the
> butterfly out again. And once I've figured out how to program it with
> that, I may take another stab at the bootloader.


I'm just guessing here, but it's possible if you use regular ISP
programming on the Butterfly, then it may erase the bootloader.

????


> Especially considering
> that I think I have brickedthe Coridium ARMmite board I was planning to
> use as the brain of my firefighting bot...
> Best,
> - Joe


Ummm, what is "bricked"? :-) I thought you also had the ARMexpress.





Posted by Joe Strout on May 29, 2007, 10:31 am

> I'm just guessing here, but it's possible if you use regular ISP
> programming on the Butterfly, then it may erase the bootloader.

True. But the code for the bootloader is available, and so (I am told)
could be reloaded.

> > Especially considering
> > that I think I have brickedthe Coridium ARMmite board I was planning to
> > use as the brain of my firefighting bot...
>
> Ummm, what is "bricked"? :-)

Brick (v). To render inoperable, i.e., as functional as a brick.

> I thought you also had the ARMexpress.

Yep. But that has no A/D inputs, without which it's pretty useless, at
least for this bot. (I will have half a dozen analog sensors measuring
distance to the walls, flame sensor signal, etc.)

Best,
- Joe

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