subject:"\[beagleboard\] purpose of BBB\/BBGW AIN7 connection\?"

RE: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread Gerald Coley

It was there to allow the SW to detect whethe or not the external LDO was 
working, something that never made it into the vault of SW features.

Gerald

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of David McRell
Sent: Friday, June 9, 2017 2:06 PM
To: beagleboard@googlegroups.com
Subject: Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Hello Gerald,

Thank you for your reply.  Not worried about warranty here.  Just checking for 
unknown dependencies.

David

On Fri, Jun 9, 2017 at 1:50 PM, Gerald Coley 
mailto:gcol...@emprodesign.com>> wrote:
Use it for what ever you like. Just keep in mind it would void the warranty on 
the board.

Gerald

From: beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com> 
[mailto:beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com>] On 
Behalf Of David McRell
Sent: Friday, June 9, 2017 1:47 PM
To: BeagleBoard 
mailto:beagleboard@googlegroups.com>>
Subject: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Hello,

What is the purpose of the resistor divider connected to AIN7?  What software 
is dependent on this, if any?

Is this only a convenient connection to quickly test ADC functionality?  I find 
no mention of AIN7 here, e2e.ti.com<http://e2e.ti.com> or on the web that 
convincingly indicates otherwise.

I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.

I'd like to use AIN7 as general purpose ADC of thermistor.

Kind Regards,
David McRell

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Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread David McRell

Hello William,

Thank you for your reply.  I didn't even notice your 'typo' until you
mentioned it. :)  Yeah, I understand what you are getting at.  Thankfully,
all AIN pin are not far under Sitara, so adding another trace doesn't look
too difficult.

David

On Fri, Jun 9, 2017 at 2:03 PM, William Hermans  wrote:

> Sorry, AIN0-AIN6, but you got the idea already hopefully. And just to be
> clear, you would only need one pf the ADC lines, not all 7.
>
> On Fri, Jun 9, 2017 at 11:57 AM, William Hermans 
> wrote:
>
>>
>>
>> On Fri, Jun 9, 2017 at 11:47 AM, David McRell <
>> dmcrell.centra...@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> What is the purpose of the resistor divider connected to AIN7?  What
>>> software is dependent on this, if any?
>>>
>>> Is this only a convenient connection to quickly test ADC functionality?
>>> I find no mention of AIN7 here, e2e.ti.com or on the web that
>>> convincingly indicates otherwise.
>>>
>>> I realize AIN requires 1V8 maximum, hence the divider given the 3V3
>>> input.
>>>
>>> I'd like to use AIN7 as general purpose ADC of thermistor.
>>>
>>> Kind Regards,
>>> David McRell
>>>
>>
>> It might be better to just use a pin multiplexer, then use AIN1-6. We did
>> that for one of our projects, and it works great. Also keep in mind that
>> this would not slow down reading from the ADC much, if at all. A simple
>> "line select" with a GPIO based multiplexer could be really fast.
>>
>
> --
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> .
>
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>

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Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread David McRell

Hello Gerald,

Thank you for your reply.  Not worried about warranty here.  Just checking
for unknown dependencies.

David

On Fri, Jun 9, 2017 at 1:50 PM, Gerald Coley 
wrote:

> Use it for what ever you like. Just keep in mind it would void the
> warranty on the board.
>
>
>
> Gerald
>
>
>
>
>
> *From:* beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com]
> *On Behalf Of *David McRell
> *Sent:* Friday, June 9, 2017 1:47 PM
> *To:* BeagleBoard 
> *Subject:* [beagleboard] purpose of BBB/BBGW AIN7 connection?
>
>
>
> Hello,
>
>
>
> What is the purpose of the resistor divider connected to AIN7?  What
> software is dependent on this, if any?
>
>
>
> Is this only a convenient connection to quickly test ADC functionality?  I
> find no mention of AIN7 here, e2e.ti.com or on the web that convincingly
> indicates otherwise.
>
>
>
> I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.
>
>
>
> I'd like to use AIN7 as general purpose ADC of thermistor.
>
>
>
> Kind Regards,
>
> David McRell
>
>
>
>
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google Groups
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> To unsubscribe from this group and stop receiving emails from it, send an
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> <https://groups.google.com/d/msgid/beagleboard/2674a523-db8b-421b-ae71-d8227771c382%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
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>
> --
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Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread William Hermans

Sorry, AIN0-AIN6, but you got the idea already hopefully. And just to be
clear, you would only need one pf the ADC lines, not all 7.

On Fri, Jun 9, 2017 at 11:57 AM, William Hermans  wrote:

>
>
> On Fri, Jun 9, 2017 at 11:47 AM, David McRell  > wrote:
>
>> Hello,
>>
>> What is the purpose of the resistor divider connected to AIN7?  What
>> software is dependent on this, if any?
>>
>> Is this only a convenient connection to quickly test ADC functionality?
>> I find no mention of AIN7 here, e2e.ti.com or on the web that
>> convincingly indicates otherwise.
>>
>> I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.
>>
>> I'd like to use AIN7 as general purpose ADC of thermistor.
>>
>> Kind Regards,
>> David McRell
>>
>
> It might be better to just use a pin multiplexer, then use AIN1-6. We did
> that for one of our projects, and it works great. Also keep in mind that
> this would not slow down reading from the ADC much, if at all. A simple
> "line select" with a GPIO based multiplexer could be really fast.
>

-- 
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Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread William Hermans

On Fri, Jun 9, 2017 at 11:47 AM, David McRell 
wrote:

> Hello,
>
> What is the purpose of the resistor divider connected to AIN7?  What
> software is dependent on this, if any?
>
> Is this only a convenient connection to quickly test ADC functionality?  I
> find no mention of AIN7 here, e2e.ti.com or on the web that convincingly
> indicates otherwise.
>
> I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.
>
> I'd like to use AIN7 as general purpose ADC of thermistor.
>
> Kind Regards,
> David McRell
>

It might be better to just use a pin multiplexer, then use AIN1-6. We did
that for one of our projects, and it works great. Also keep in mind that
this would not slow down reading from the ADC much, if at all. A simple
"line select" with a GPIO based multiplexer could be really fast.

-- 
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RE: [beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread Gerald Coley

Use it for what ever you like. Just keep in mind it would void the warranty on 
the board.

Gerald

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of David McRell
Sent: Friday, June 9, 2017 1:47 PM
To: BeagleBoard 
Subject: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Hello,

What is the purpose of the resistor divider connected to AIN7?  What software 
is dependent on this, if any?

Is this only a convenient connection to quickly test ADC functionality?  I find 
no mention of AIN7 here, e2e.ti.com or on the web that convincingly indicates 
otherwise.

I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.

I'd like to use AIN7 as general purpose ADC of thermistor.

Kind Regards,
David McRell

--
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---
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[beagleboard] purpose of BBB/BBGW AIN7 connection?

2017-06-09 Thread David McRell

Hello,

What is the purpose of the resistor divider connected to AIN7?  What 
software is dependent on this, if any?

Is this only a convenient connection to quickly test ADC functionality?  I 
find no mention of AIN7 here, e2e.ti.com or on the web that convincingly 
indicates otherwise.

I realize AIN requires 1V8 maximum, hence the divider given the 3V3 input.

I'd like to use AIN7 as general purpose ADC of thermistor.

Kind Regards,
David McRell


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RE: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

Re: [beagleboard] purpose of BBB/BBGW AIN7 connection?

RE: [beagleboard] purpose of BBB/BBGW AIN7 connection?

[beagleboard] purpose of BBB/BBGW AIN7 connection?

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