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Dangerous Prototypes

Dangerous Prototypes => Bus Pirate Development => Topic started by: nikki81 on May 19, 2014, 03:34:21 pm

Title: Is this possible ?
Post by: nikki81 on May 19, 2014, 03:34:21 pm
Is it possible to piggy back a second pic on the v3 bus pirate and switch between them so I don't have to reload the firmware  when I use it for avr flashing ?

Thanks Nikki
Title: Re: Is this possible ?
Post by: AndThen on May 20, 2014, 12:18:26 am
It wouldn't be very "pretty" but the IC legs might be long enough to reform so you can solder a second on top then do some sort of a flying lead and switch to select which PIC gets power. This is of course theory I certainly haven't tried it.
Title: Re: Is this possible ?
Post by: Sjaak on July 04, 2014, 03:09:33 pm
AFAIK does avrdude support the buspirate in native mode (the normal buspirate)
Title: Is this possible ?
Post by: TomKeddie on July 06, 2014, 05:58:00 pm
[quote author="Sjaak"]AFAIK does avrdude support the buspirate in native mode (the normal buspirate)[/quote]

Yes, I was excited about this but the speed is horrific.


The dual pic idea is a decent one but you'll need to make sure the output of the unused device are floating.  Might be easier to add a second identical pcb and share the ft232.


Sent from my iPad using Tapatalk HD
Title: Re: Is this possible ?
Post by: Sjaak on August 13, 2014, 09:15:23 pm
Sorry for the late reply..

I think the clamping diodes of the in/output would possibly power the second chip and that would interfere with the other. Don't think it is very reliable ;) FOr avoiding the hassle I would suggest buy another buspirate :)
Title: Re: Is this possible ?
Post by: Sleepwalker3 on August 14, 2014, 02:02:46 pm
Considering the cost of the pic, why not just pick up one of these?
http://http://www.ebay.com/itm/200915911991
Title: Re: Is this possible ?
Post by: JohnLittle on August 14, 2014, 04:12:42 pm
@Sleepwalker3

Wow, that's cheap! Looks like these programmers can even be turned into *rduino boards. See "Project Ouroboros — Reflashing A Betemcu USBasp Programmer" (maybe, article about original USBASP, not v2.0).
Title: Re: Is this possible ?
Post by: Sleepwalker3 on August 15, 2014, 04:21:00 pm
They can be used as a small dev board I believe.
http://http://www.fischl.de/usbasp/  (might not be exactly the same as ebay one)

You might also want to checkout http://http://highlowtech.org/?p=1801

and
http://http://littlewire.cc/

and adafruit's tinyisp also.

Have fun  :)
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