[Xenomai-help] Porting comedi drivers to the analogy layer

[Xenomai-help] Porting comedi drivers to the analogy layer

[Julien Delange]

Dear all,

I'm currently using Xenomai with the analogy drivers for one card. It 
works perfectly and I am able to interface real-time apps with my 
national instrument card. However, the card I had until now (PCI-6071E) 
is supported by both the analogy layer of Xenomai and comedi. Now, I 
would like to use another national instrument card : the PCI-6704. 
Unfortunately, it seems not supported by the analogy layer even if the 
comedi driver supports it. So, I am wondering if porting the driver from 
comedi to the analogy layer would require a significant development 
effort and if there was similar initiative (potential port that were not 
backported to the trunk of Xenomai).

Thanks for any comment/suggestion,

Best regards,

Re: [Xenomai-help] Porting comedi drivers to the analogy layer

[Alexis Berlemont]

Hi,

Sorry for answering late.

Julien Delange wrote:
> Dear all,
> 
> I'm currently using Xenomai with the analogy drivers for one card.
> It works perfectly and I am able to interface real-time apps with my
> national instrument card. However, the card I had until now
> (PCI-6071E) is supported by both the analogy layer of Xenomai and
> comedi. Now, I would like to use another national instrument card :
> the PCI-6704. Unfortunately, it seems not supported by the analogy
> layer even if the comedi driver supports it. 

Indeed, the code for this driver is located in ni_670x.c in the
linux/staging tree.

> So, I am wondering if
> porting the driver from comedi to the analogy layer would require a
> significant development effort 

The size of the source code seems limited (~400 lines) and it seems
there is no asynchronous functionalities (no cmd only instructions);
so, I think that this port should not be too difficult. It should only
be literal translation of the Comedi functions calls into the analogy
ones. 

> and if there was similar initiative
> (potential port that were not backported to the trunk of Xenomai).
> 

I was not informed of any port for this driver.

> Thanks for any comment/suggestion,
> 
> Best regards,
> 
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> Xenomai-help@domain.hid
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-- 
Alexis.