[MinnowBoard] Echo to MinnowBoardMax GPIO export fails

[John Hawley]

Ok Darren merged this into the main
https://github.com/MinnowBoard/minnow-max-extras/blob/master/lse/what_gpio_num.sh
repo this morning, use that as my link may get culled at some point.

- John

On 1/7/2015 5:39 PM, Michael Jones wrote:
> John,
> 
> Nice, the script works on my board. I can also read values on the pin I need to use.
> 
> Thanks a million!
> 
> Now I just need to make a Haskell wrapper to go along with I2C module. If anyone else is crazy enough to use Haskell on the MinnowBoardMax, let me know.
> 
> Mike
> 
> On Jan 7, 2015, at 6:32 PM, John Hawley <john.hawley at intel.com> wrote:
> 
>> Ok I spent a little bit of time digging into this, it *LOOKS* like
>> Ubuntu is offset by +256 vs. stock and/or Fedora kernels.  Not 100% sure
>> why yet.
>>
>> That being said I wrote up a quick script that should discover the right
>> values for everything and output it to a text console:
>>
>> https://github.com/warthog9/minnow-max-extras/blob/master/lse/what_gpio_num.sh
>>
>> and I've got a merge request in with it (I'll let Darren have a look at
>> it and yell at me about it before it gets merged).
>>
>> If you are having problems, can you run that script and let me know if
>> the output is right for you?  In the meantime I'll try and dig into why
>> the offset.
>>
>> - John 'Warthog9' Hawley
>>
>> On 01/07/2015 06:51 AM, Michael Jones wrote:
>>> Martin,
>>>
>>> Very helpful, thanks. I had to think a bit to understand the base of 82 and 154.
>>>
>>> For others:
>>>
>>> For 8x, Code GPIO# = 338 + Linux GPIO# (Chart) - 82
>>> For 2x, Code GPIO# = 410 + Linux GPIO# (Chart) - 154
>>>
>>> So for the two examples:
>>>
>>> 338 + 84 - 82 = 340
>>>
>>> and
>>>
>>> 410 + 208 - 154 = 464
>>>
>>> I’ll give this a try later this week. 
>>>
>>> Are there any proper ways to expose the /sys paths for user mode like one can do for /dev/ttyN? Or do people just run their code as root?
>>>
>>> Mike
>>>
>>>
>>> On Jan 5, 2015, at 7:29 AM, Martin Oldfield <elinux-mbmx-2014-11 at mjoldfield.com> wrote:
>>>
>>>> I've also found wildly different GPIO numbers on my Minnowboard Max.
>>>>
>>>> You can read about it at
>>>> http://www.mjoldfield.com/atelier/2014/12/mbmx-gpio.html.
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context: http://minnowboard.57273.x6.nabble.com/MinnowBoard-Echo-to-MinnowBoardMax-GPIO-export-fails-tp903p907.html
>>>> Sent from the MinnowBoard mailing list archive at Nabble.com.
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> 
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