Hi,
On 2014-03-23 14:33, Jonathan Cameron wrote:
On 23/03/14 18:54, Zubair Lutfullah : wrote:
On Sun, Mar 23, 2014 at 05:46:08PM +0000, Jonathan Cameron wrote:
On 22/03/14 17:19, gmane@xxxxxxxxxxxxxxxxxxxxxxxxxxx wrote:
Hi,
I use a beagle bone black with a 3.13.6 kernel and would like to
get the
./generic_buffer test which comes with the kernel to work.
This is what I do:
echo 1 > /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
ls /sys/bus/iio/devices/
iio:device0 iio_sysfs_trigger trigger0
cat /sys/bus/iio/devices/trigger0/name
sysfstrig1
echo 1 >
/sys/bus/iio/devices/iio:device0/scan_elements/in_voltage5_en
./generic_buffer.out -n TI-am335x-adc -t sysfstrig1 -l 128
iio device number being used is 0
iio trigger number being used is 0
sysfstrig1
---> Could not open /trigger/current_trigger
Failed to write current_trigger file
How can I get rid of this?
Is this a problem with my driver, or should I just create this
magic
file somewhere?
Does /sys/bus/iio/device/iio:device0/trigger/current_trigger exist?
If so, try
echo sysfstrig1 >
/usys/bus/iio/device/iio:device0/trigger/current_trigger
and see if that gives an error or not, then cat the same file to see
if
it 'took'.
Otherwise, I'm not sure...
Zubair, any thoughts?
I thought we removed trigger from this driver for using continuous
sampling.
It was a hardware buffer driver with not proper support in
generic_buffer.c
Good point. I have a mind like a sieve sometimes :)
This might explain my issues ;)
For one-shot sampling you just cat
/sys/bus/iio/devices/iio:device0/channel etc.
As far as I remember this works.
For continuous sampling, modify generic_buffer.c to remove trigger
checks.
I will have a look at the code and will try to understand what you are
talking about ;)
Could you please tell me where you got this driver? It shouldn't be
in any tree..
From the email I suspect he's using your mainlined driver, but without
the
generic_buffer.c changes (as you never sent them out, *hint*)
I would assume this is mainline and also the generic_buffer.c is from
the same mainline kernel.
To be exact:
kernel:
3.13.6 stable
patches:
https://github.com/RobertBerger/meta-mainline/blob/dora-training-v3.13.x/beagle-bone-black-ml/recipes-kernel/linux/linux-yocto-custom/beagle-bone-black-ml-user-patches.scc
(which should not affect iio)
BTW:
This (your) reply email does not show up in Gmane[1] for some strange
reason, hence my late reply and the additional post [2] (where replies
seem to work)
[1] http://thread.gmane.org/gmane.linux.kernel.iio/11631
[2] http://thread.gmane.org/gmane.linux.kernel.iio/11673
Regards
ZubairLK
Regards,
Robert
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