iio for the end user

iio for the end user

[Matt Flax]

Hi there,

I have been working towards getting something together which allows the 
end user to use IIO with 'standard applications' and also support 
network connectivity. I have a set of ADCs running using IIO at the 
moment, so I am focussing on input. I am aware that this paradigm may 
fall over for very  high sample rates, but for lower sample rates, of 
the order of 1 MHz, it should work.

I am writing to this list to find out if there are other networkable 
approaches in linking iio into other existing protocols/software which 
would suit the end user ? I am new to this list and didn't find much in 
the archives, however perhaps I missed something ?

My first attempt for user space IIO is to use Jack and integrate iio 
into Jack as a driver. I have successfully created this iio driver for 
jack [1] and I can get the driver to run with very low latencies.
The best spec. without overruns is :  4 channels at 1MHz with mmap block 
sizes of 256 samples using 3 periods ... thats roughly 0.75 ms maximum 
latency at the jack driver level.
The current stage of development is  to connect a jack client to this 
new iio driver and I am in the stage of debugging that work.

thanks
Matt
[1] https://github.com/flatmax/jack1

Re: iio for the end user

[Matt Flax]

Hi again,

I would like to ask a second time.

Are there any end user systems which support IIO ?

If not then are there any efforts for a networking protocol/library/API 
for IIO streaming ? Particularly interested in multi device input 
streaming at this point in time.

I have been working further on the jack IIO driver, however it seems 
that the concept of getting such high sample rates running on embedded 
cores may prove to challenging for audio subsystems. Whilst reading in 
the jack 'driver' space is ok, connecting clients to the 'driver' is 
difficult when trying to keep up with the higher then traditional audio 
sample rates.

thanks
Matt

On 07/02/14 09:13, Matt Flax wrote:
> Hi there,
>
> I have been working towards getting something together which allows 
> the end user to use IIO with 'standard applications' and also support 
> network connectivity. I have a set of ADCs running using IIO at the 
> moment, so I am focussing on input. I am aware that this paradigm may 
> fall over for very  high sample rates, but for lower sample rates, of 
> the order of 1 MHz, it should work.
>
> I am writing to this list to find out if there are other networkable 
> approaches in linking iio into other existing protocols/software which 
> would suit the end user ? I am new to this list and didn't find much 
> in the archives, however perhaps I missed something ?
>
> My first attempt for user space IIO is to use Jack and integrate iio 
> into Jack as a driver. I have successfully created this iio driver for 
> jack [1] and I can get the driver to run with very low latencies.
> The best spec. without overruns is :  4 channels at 1MHz with mmap 
> block sizes of 256 samples using 3 periods ... thats roughly 0.75 ms 
> maximum latency at the jack driver level.
> The current stage of development is  to connect a jack client to this 
> new iio driver and I am in the stage of debugging that work.
>
> thanks
> Matt
> [1] https://github.com/flatmax/jack1
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Re: iio for the end user

[Manuel Stahl]

Hi Matt,

these are the projects I'm aware of:
http://sourceforge.net/projects/iioutils/
https://wiki.analog.com/resources/tools-software/linux-software/iio_multi_plot_oscilloscope
https://wiki.analog.com/resources/tools-software/linux-software/iio_oscilloscope
https://wiki.analog.com/software/linux/docs/iio/iio_netscope
https://wiki.analog.com/resources/tools-software/linux-software/iio_cmdsrv

for iioutils I was planning to add a daemon much like gpsd for GPS devices.

Regards,
Manuel Stahl

Am Dienstag, 11. Februar 2014, 08:30:18 schrieb Matt Flax:
> Hi again,
> 
> I would like to ask a second time.
> 
> Are there any end user systems which support IIO ?
> 
> If not then are there any efforts for a networking protocol/library/API 
> for IIO streaming ? Particularly interested in multi device input 
> streaming at this point in time.
> 
> I have been working further on the jack IIO driver, however it seems 
> that the concept of getting such high sample rates running on embedded 
> cores may prove to challenging for audio subsystems. Whilst reading in 
> the jack 'driver' space is ok, connecting clients to the 'driver' is 
> difficult when trying to keep up with the higher then traditional audio 
> sample rates.
> 
> thanks
> Matt
> 
> On 07/02/14 09:13, Matt Flax wrote:
> > Hi there,
> >
> > I have been working towards getting something together which allows 
> > the end user to use IIO with 'standard applications' and also support 
> > network connectivity. I have a set of ADCs running using IIO at the 
> > moment, so I am focussing on input. I am aware that this paradigm may 
> > fall over for very  high sample rates, but for lower sample rates, of 
> > the order of 1 MHz, it should work.
> >
> > I am writing to this list to find out if there are other networkable 
> > approaches in linking iio into other existing protocols/software which 
> > would suit the end user ? I am new to this list and didn't find much 
> > in the archives, however perhaps I missed something ?
> >
> > My first attempt for user space IIO is to use Jack and integrate iio 
> > into Jack as a driver. I have successfully created this iio driver for 
> > jack [1] and I can get the driver to run with very low latencies.
> > The best spec. without overruns is :  4 channels at 1MHz with mmap 
> > block sizes of 256 samples using 3 periods ... thats roughly 0.75 ms 
> > maximum latency at the jack driver level.
> > The current stage of development is  to connect a jack client to this 
> > new iio driver and I am in the stage of debugging that work.
> >
> > thanks
> > Matt
> > [1] https://github.com/flatmax/jack1
> 
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