[arm-allstar] GPIO for PTT and COS?

[David Lang]

On Tue, 7 Jun 2016, David McGough via arm-allstar wrote:

>
> Hi Greg,
>
> The issue isn't C--you have to remember that python, java, the Linux
> Kernel, etc., are all written in C.
>
> My major concern is that we've got varying support for several different
> hardware platforms, including RPi2/3, BBB, various Odroids and I've got
> this code running on PC hardware, too.  Managing GPIO between each of
> these different platforms is subtly to significantly different, leading to
> many potential headaches....For example: if software monitoring a rain
> gauge misses an interrupt, nothing disastrous happens.  If repeater
> controller software misses an interrupt, the transmitter might not unkey,
> or COS might act flaky now and then, not activating when someone tries to
> key the repeater. With the AllStar code, if any inconsistency happens even
> occasionally, it's a huge deal.
>
> The advantage obtained by sticking with USB hardware (like a CM1xy sound
> FOB) is that the software API is the same across all the various
> computers. And, that software is very well tested.
>
> Now that modifiable sound FOBs are getting harder to obtain, I'm looking
> hard at getting more I/O solutions available, in a modular way.

Is there a development tree of this available somewhere for experimenters to 
play with and try and help with?

David Lang

> 73, David KB4FXC
>
>
>
> On Tue, 7 Jun 2016, Greg Thornwall via arm-allstar wrote:
>
>>
>> Hi David & Doug,
>> Is that because of the lack of interrupts in C on the Pi?  I built a wx
>> station and implemented  an interrupt in Python that listens to my rain
>> gauge, a reed switch that closes for a fraction of a second.
>>
>> I guess there's nothing like that in C on the Pi? Or is there more to it
>> than that? Can one integrate Python code into C? In Java you can use JNI
>> for native C calls.
>>
>> 73 Greg KD3SU
>>
>>
>>
>> On 06/07/2016 01:29 PM, David McGough via arm-allstar wrote:
>>> Hi Greg,
>>>
>>> Currently there isn't a way to efficiently utilize the RPi2/3 on-board
>>> GPIO for PTT or COS.  However, more I/O methods are currently in
>>> development.  This new code will start showing up in upcoming Alpha/Beta
>>> releases.
>>>
>>> 73, David KB4FXC
>>>
>>>
>>>
>>>
>>>
>>> On Tue, 7 Jun 2016, Greg Thornwall via arm-allstar wrote:
>>>
>>>> I was wondering is there a way (in the code) to setup using 2 GIPOs for
>>>> COS and PTT? Do you know where that's implemented in the code? Is it in
>>>> the channel C files? I would guess there are some C GIPO libraries for
>>>> the Raspberry Pis.
>>>>
>>>> Tnx 73 Greg KD3SU
>>>>
>>>>
>>>>
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>>>
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>>>
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>>>
>>
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>>
>
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