Checking GPIOpins for being healthy

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1

Hi,

I accidentally wired my BB wrong. I connected (+) and (-) to GPIOs
(default setting).

I would like to check, whether these PINS had survived me.

What is a valid most simplistic way to do so?

Thank you very much in advance for any help!
Best regards,
Meino

2

plus and minus what ?

3

evilwulfie <evilwulfie@gmail.com> [15-01-15 17:20]:

plus and minus what ?

> Hi,
>
> I accidentally wired my BB wrong. I connected (+) and (-) to GPIOs
> (default setting).
>
> I would like to check, whether these PINS had survived me.
>
> What is a valid most simplistic way to do so?
>
> Thank you very much in advance for any help!
> Best regards,
> Meino
>
>

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Hi evilwuffie,

:slight_smile: ...ok, I was a little toooo fast: :wink:

(+) and (-) were of a 3.2V Lithium coin cell...

Best regards,
Meino

4

This shouldn’t be a problem, since most header pins are configured as GPIO input by default and therefor can receive 3V2 input.

5

TJF <jeli.freiherr@gmail.com> [15-01-17 04:10]:

This shouldn't be a problem, since most header pins are configured as GPIO
input by default and therefor can receive 3V2 input.

>
> I would like to check, whether these PINS had survived me.
>
> What is a valid most simplistic way to do so?
>

You could use the examples in libpruio to check the pins. Ie. io_input
<http://users.freebasic-portal.de/tjf/Projekte/libpruio/doc/html/_cha_examples.html#SubSecExaIoInput>
shows the state of all GPIOs. Or button
<http://users.freebasic-portal.de/tjf/Projekte/libpruio/doc/html/_cha_examples.html#SubSecExaButton>
configures a single GPIO as input and shows its state. It's easy to
customize the code for your pins or to test a GPIO pin as output.

Run analyse
<http://users.freebasic-portal.de/tjf/Projekte/libpruio/doc/html/_cha_examples.html#SubSecExaAnalyse>
right after booting to get a list of the default header pin configuration.

Good luck!

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Hi.

sorry for the delayed reply...your mail was accidently put into the
spam folder by procmail...have to look why...

Thanks for the links! Will check that...

What makes me worry isn't the voltage. It was the speed with that the
battery was half emptied which implies a high current. The battery was
a CR1220 coin cell.

I have no knowledge about the internal design of such GPIO pin
attached silizium...could it be, that (fr example) the input
functionality get fried by teh current and out and/or other functions
are still working. Or is this view too simplistic?

Best regards,
Meino