Paul,
I've got the MAX31850 development board and can run some tests for you.
I've verified basic temperature measurement operation with the owcapi and
owfs. As I mentioned it doesn't seem to support 12 bit operation (default
for <device>/temperature), but I know temperature9 and temperature10 worked
fine.
I haven't modified my software to use the device yet, so it's been a while
since I used it.
I suppose you could do a device probe to see which commands return values
and make a decision on device type from that. I don't think that's the
model you've used up until now, but I'm not that familiar with the code.
Let me know what you'd like me to look into.
Paul Panish
On Wednesday, February 5, 2014, paul.alfille <[email protected]> wrote:
> We don't really suppoert the max31850 yet. It looks great with
> thermocouple support.
>
> Part if the dificult is distinguishing it from the max31825. Do you have a
> 850 running to try some tests for me?
>
>
>
> Sent via the Samsung Galaxy S(tm) III, an AT&T 4G LTE smartphone
>
>
>
> -------- Original message --------
> From: Colin Reese
> <[email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>>
>
> Date: 02/05/2014 1:06 PM (GMT-07:00)
> To: "OWFS (One-wire file system) discussion and help" <
> [email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>>
>
> Subject: Re: [Owfs-developers] Planned Device Support
>
>
> Hmm. How would the resolution issue be resolved?
>
>
> On Sun, Feb 2, 2014 at 4:48 AM, Paul W Panish
> <[email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>
> > wrote:
>
>> The MAX31850 is already supported in the 3B family of devices. I rigged
>> up a test jig with the development board available from Maxim and it worked
>> fine, however it doesn't support the full (default) 12 bit resolution of
>> other temperature devices, and as a result reads will fail unless a lower
>> resolution is specified. I don't remember off hand how high you can go in
>> resolution value.
>>
>> Another disadvantage is that you can't distinguish the device type from
>> the family code ( or anything else as far as I know), so you can't
>> programmatically tell the difference between the 3B devices which have
>> on-board EPROM, and those that don't. For my purposes this doesn't matter
>> very much, but it is unfortunate that more identification capability isn't
>> built into these devices.
>>
>> Paul Panish
>>
>>
>> On Saturday, February 1, 2014, Colin Reese
>> <[email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>>
>> wrote:
>>
>>> Paul,
>>>
>>> Is there a place besides here (http://owfs.org/index.php?page=to-do) for
>>> discussion of planned device support?
>>>
>>> I'd like to incorporate some MAX31850 thermocouple adapters, but I don't
>>> see owfs reference to them anywhere except this closed ticket:
>>> http://sourceforge.net/p/bctl/tickets/2/
>>>
>>> I see that the DS2760 is supported, but can't seem to locate any.
>>>
>>> Suggestions?
>>>
>>> Thanks,
>>> Colin
>>>
>>>
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