quick help - linux Industrial IO Hardware Triggers

quick help - linux Industrial IO Hardware Triggers

[Sricharan Chalasani]

Hi List,

Thanks in advance.

In the existing IIO drivers (linux-3.16), my understanding is that Hardware
Triggers are just used to copy sampled data from the ADC to the Kernel
buffer. I think none of the hardware triggers are really configuring ADC to
Start the analog to digital conversion.

I have a Hardware Counter on my Board. I am planning to configure my
Counter overflow interrupt as an IIO Hardware Trigger. In my IIO ADC driver
probe function I am planning to start my Counter for the first time. Once
the counter overflow interrupted is generated, inside the counter ISR, I am
planning to configure ADC to start analog to digital conversion on all the
channels (4 of them), one sample on each channel and once the Conversion is
completed, I am planning to copy the Sampled data to Kernel buffer
associated with the Trigger.

I will program the Counter again and wait for interrupt and repeat the
steps above. I am planning to continue this approach indefinitely.

Does this approach satisfy the principles of IIO Subsystem ? Am I missing
anything here in understanding the IIO Subsystem properly ?

Thanks in advance,

Sricharan,
Pune (India).
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quick help - linux Industrial IO Hardware Triggers

[Greg KH]

On Wed, Aug 20, 2014 at 11:33:26PM +0530, Sricharan Chalasani wrote:
> Hi List,
> 
> Thanks in advance.
> 
> In the existing IIO drivers (linux-3.16), my understanding is that Hardware
> Triggers are just used to copy sampled data from the ADC to the Kernel buffer.
> I think none of the hardware triggers are really configuring ADC to Start the
> analog to digital conversion.

<snip>

Why not ask this on the iio driver mailing list?  The developers there
should be able to help answer your questions better than anyone else.

thanks,

greg k-h

quick help - linux Industrial IO Hardware Triggers

[Sricharan Chalasani]

Hi all,

I have a query on Linux Industrial IO Subsystem. I am particularly
interested in understanding how to use Hardware Triggers. Like to use
Counter overflow interrupt as a Trigger for conversion from Analog to
digital in my case. Somehow I failed to find-out the proper mailing list to
post my query. I know that I need to post my query to Industrial IO mailing
list.

Could someone suggest me which is the correct mailing list in this regard.

Thanks in advance,

Sricharan.





On Thu, Aug 21, 2014 at 12:35 AM, Greg KH <greg@kroah.com> wrote:

> On Wed, Aug 20, 2014 at 11:33:26PM +0530, Sricharan Chalasani wrote:
> > Hi List,
> >
> > Thanks in advance.
> >
> > In the existing IIO drivers (linux-3.16), my understanding is that
> Hardware
> > Triggers are just used to copy sampled data from the ADC to the Kernel
> buffer.
> > I think none of the hardware triggers are really configuring ADC to
> Start the
> > analog to digital conversion.
>
> <snip>
>
> Why not ask this on the iio driver mailing list?  The developers there
> should be able to help answer your questions better than anyone else.
>
> thanks,
>
> greg k-h
>
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quick help - linux Industrial IO Hardware Triggers

[Kristofer Hallin]

Try search for linux-iio using Google and click on the first link [1].
Also, take a look on vgers list index [2].

[1] http://wiki.analog.com/software/linux/docs/iio/iio
[2] http://vger.kernel.org/vger-lists.html
On 21 Aug 2014 05:40, "Sricharan Chalasani" <sricharan.chalasani@gmail.com>
wrote:

> Hi all,
>
> I have a query on Linux Industrial IO Subsystem. I am particularly
> interested in understanding how to use Hardware Triggers. Like to use
> Counter overflow interrupt as a Trigger for conversion from Analog to
> digital in my case. Somehow I failed to find-out the proper mailing list to
> post my query. I know that I need to post my query to Industrial IO mailing
> list.
>
> Could someone suggest me which is the correct mailing list in this regard.
>
> Thanks in advance,
>
> Sricharan.
>
>
>
>
>
> On Thu, Aug 21, 2014 at 12:35 AM, Greg KH <greg@kroah.com> wrote:
>
>> On Wed, Aug 20, 2014 at 11:33:26PM +0530, Sricharan Chalasani wrote:
>> > Hi List,
>> >
>> > Thanks in advance.
>> >
>> > In the existing IIO drivers (linux-3.16), my understanding is that
>> Hardware
>> > Triggers are just used to copy sampled data from the ADC to the Kernel
>> buffer.
>> > I think none of the hardware triggers are really configuring ADC to
>> Start the
>> > analog to digital conversion.
>>
>> <snip>
>>
>> Why not ask this on the iio driver mailing list?  The developers there
>> should be able to help answer your questions better than anyone else.
>>
>> thanks,
>>
>> greg k-h
>>
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
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quick help - linux Industrial IO Hardware Triggers

[Anders Darander]

On 21 August 2014 06:07, Kristofer Hallin <kristofer.hallin@gmail.com> wrote:
> Try search for linux-iio using Google and click on the first link [1]. Also,
> take a look on vgers list index [2].
>
> [1] http://wiki.analog.com/software/linux/docs/iio/iio
> [2] http://vger.kernel.org/vger-lists.html

In addition to Kristofers suggestions, take a look at the MAINTAINERS
file in the
source tree.

Cheers,
Anders


> On 21 Aug 2014 05:40, "Sricharan Chalasani" <sricharan.chalasani@gmail.com>
> wrote:
>>
>> Hi all,
>>
>> I have a query on Linux Industrial IO Subsystem. I am particularly
>> interested in understanding how to use Hardware Triggers. Like to use
>> Counter overflow interrupt as a Trigger for conversion from Analog to
>> digital in my case. Somehow I failed to find-out the proper mailing list to
>> post my query. I know that I need to post my query to Industrial IO mailing
>> list.
>>
>> Could someone suggest me which is the correct mailing list in this regard.
>>
>> Thanks in advance,
>>
>> Sricharan.
>>
>>
>>
>>
>>
>> On Thu, Aug 21, 2014 at 12:35 AM, Greg KH <greg@kroah.com> wrote:
>>>
>>> On Wed, Aug 20, 2014 at 11:33:26PM +0530, Sricharan Chalasani wrote:
>>> > Hi List,
>>> >
>>> > Thanks in advance.
>>> >
>>> > In the existing IIO drivers (linux-3.16), my understanding is that
>>> > Hardware
>>> > Triggers are just used to copy sampled data from the ADC to the Kernel
>>> > buffer.
>>> > I think none of the hardware triggers are really configuring ADC to
>>> > Start the
>>> > analog to digital conversion.
>>>
>>> <snip>
>>>
>>> Why not ask this on the iio driver mailing list?  The developers there
>>> should be able to help answer your questions better than anyone else.
>>>
>>> thanks,
>>>
>>> greg k-h
>>
>>
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>



-- 
Anders Darander
EPO guidelines 1978: "If the contribution to the known art resides
solely in a computer program then the subject matter is not
patentable in whatever manner it may be presented in the claims."