[TangerineSDR] TangerineSDR Digest, Vol 14, Issue 25

Julius Madey hillfox at fairpoint.net
Mon May 18 20:37:07 EDT 2020


Dave,
After correcting a minor issue in the function 'read temp' in main.c 
where you inadvertently left out the comment // before the word 'works', 
it compiled nicely and runs fine.

I note that the gain corrected readout is in integer microteslas. When I 
patched your original code to include gain, I also used microteslas with 
3 decimal places to the right; with a cycle count of 200 (gain 75) it's 
actually closer to 2 decimal places (+/- 10nT) but the three places is 
handy for noise level evaluation for higher cycle counts and averaging.

Could, of course, work directly with the raw values but I find it easier 
to think of the noise / resolution issue in terms of nanoTeslas directly.

Your gain corrected values match the expected field levels in my 
location from geomag models and are identical to the readings I obtained 
with my patches to your original test code.

Thanks for all the effort !

Jules -K2KGJ


On 5/18/2020 12:00 PM, tangerinesdr-request at lists.tapr.org wrote:
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>     1. Magnetometer testing software (David Witten)
>     2. Re: Magnetometer testing software (Tom McDermott)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 17 May 2020 14:26:57 -0500
> From: David Witten <wittend at wwrinc.com>
> To: tangerinesdr at lists.tapr.org
> Subject: [TangerineSDR] Magnetometer testing software
> Message-ID:
> 	<CABJ3BVPAfRQs5xzD72CdzXxQJ+xHa8jc2QYR=niYcZ-U5jvsCA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> To all and any:
>
> I have opened up a github repo for the improved magnetometer testing
> softwareat:
>
> https://github.com/wittend/rm3100-runMag
>
> *Improved* does not mean that it *works*, and certainly any results remain
> unverified.  There are probably many egregious errors.  But it is better
> than anything that I have provided in the past (I think).  The
> documentation is rudimentary or worse, but I'm working on it.
>
> The old repo for the 'simplei2c' program has been withdrawn.  May it RIP.
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> Message: 2
> Date: Sun, 17 May 2020 21:11:50 -0700
> From: Tom McDermott <tom.n5eg at gmail.com>
> To: TAPR TangerineSDR Modular Software Defined Radio
> 	<tangerinesdr at lists.tapr.org>
> Cc: David Witten <wittend at wwrinc.com>
> Subject: Re: [TangerineSDR] Magnetometer testing software
> Message-ID:
> 	<CACO3nRSFrR3qx5f5n8qczV2xqTzyX_2HVoEwJHy604u0_zi7MQ at mail.gmail.com>
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>
> Hi Dave,  thanks for putting this up on github !
> It clones and builds with no problems.
>
> -- Tom, N5EG
>
>
>
>
> On Sun, May 17, 2020 at 12:27 PM David Witten via TangerineSDR <
> tangerinesdr at lists.tapr.org> wrote:
>
>> To all and any:
>>
>> I have opened up a github repo for the improved magnetometer testing
>> softwareat:
>>
>> https://github.com/wittend/rm3100-runMag
>>
>> *Improved* does not mean that it *works*, and certainly any results
>> remain unverified.  There are probably many egregious errors.  But it is
>> better than anything that I have provided in the past (I think).  The
>> documentation is rudimentary or worse, but I'm working on it.
>>
>> The old repo for the 'simplei2c' program has been withdrawn.  May it RIP.
>>
>>
>>
>> --
>> TangerineSDR mailing list
>> TangerineSDR at lists.tapr.org
>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>
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> End of TangerineSDR Digest, Vol 14, Issue 25
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