Guys, Thanks a lot for the help! I finally tracked down issues, it was a combination of a few things: 1. The .channel had to be 0, not 1 in the driver (scan_index didn't matter) 2. 1 or more scan_elements have to be enabled as you mentioned 2. When echoing into the sysfs files it has to have a space after the number (cat 1 > in_voltage0_en and not cat 1>in_vo…) (duh!) 3. The generic_buffer.c program had a few bugs in it causing crashes. I updated the iio_utils.h to a newer version I found here: https://github.com/analogdevicesinc/iio-oscilloscope and then made a few modifications (the newer iio_utils did not parse a few things right in the channel details like bigendian/littleendian) So generic_buffer is now correctly sampling (although it crashes after a couple, it's probably another iio_utils issue) Thanks!! -chris On Wednesday, February 27, 2013 at 1:51 PM, Lars-Peter Clausen wrote: > On 02/27/2013 07:28 PM, Jonathan Cameron wrote: > > On 02/27/2013 05:36 PM, Chris Micali wrote: > > > lars, > > > > > > I was under the impression that flag gets added automatically by iio_triggered_buffer_setup (industrialiio-triggers.c:77) - I actually am now able to enable the scan_element after changing my channel .channel and .scan_index to 0 (trying to match exactly the other drivers.) > > Yea, you are right I missed the iio_triggered_buffer_setup part. > > > Strange, scan_index should have defaulted to zero and the .channel value shouldn't have mattered > > for buffered reads (just effects naming). Might have caused issues with userspace expecting a channel 0 > > though... > > > > I guess the scan_index had nothing to do with this, but I suggested to set > scan_elements/in_voltage0_en to 1, so this clearly wouldn't have worked with > .channel being 1. > > > > > > When i run general_buffer (from the docs dir) with that scan element enabled it can no longer read the trigger (Could not open /trigger/current_trigger Failed to write current_trigger file) - this succeeds if that scan_element is not enabled. > > You can't change the trigger if the buffer is currently enabled. Make sure that > he buffer is disabled (check the buffer/enable attribute). > > - Lars > u -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
