Robert Nelson <robertcnel...@gmail.com> wrote: > On Tue, Aug 11, 2015 at 3:42 PM, <c...@isbd.net> wrote: > > Robert Nelson <robertcnel...@gmail.com> wrote: > >> On Fri, Aug 7, 2015 at 11:36 AM, <c...@isbd.net> wrote: > >> > I have a BBB running Debian GNU/Linux 7, 3.8.13-bone47 kernel. I.e. > >> > pretty standard. > >> > > >> > My raw ADC files are to be found at:- > >> > > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage0_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage1_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage2_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage3_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage4_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage5_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage6_raw > >> > /sys/devices/ocp.3/44e0d000.tscadc/tiadc/iio:device0/in_voltage7_raw > >> > > >> > Currently I use a find() function written in python which walks the > >> > /sys/devices tree to find these files, but it's very slow. If I hard > >> > code the file names how often, if at all, will they need changing? > >> > > >> > ... and/or is there an easier way to find them, i.e. is there a > >> > configuration file somewhere that tells me where they are (or at least > >> > the non-constant bits of the path)? > >> > >> You should also see them here: > >> > >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/ABI/testing/sysfs-bus-iio#n91 > >> > > >> > >> > >> What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw > >> KernelVersion: 2.6.35 > >> Contact: linux-...@vger.kernel.org > >> Description: > >> Raw (unscaled) differential voltage measurement equivalent to > >> channel Y - channel Z where these channel numbers apply to the > >> physically equivalent inputs when non differential readings are > >> separately available. In differential only parts, then all that > >> is required is a consistent labeling. Units after application > >> of scale and offset are millivolts. > >> > > That isn't really what I was asking for Robert. > > Actually it was... > > Walk: > > /sys/bus/iio/devices/iio* > Well, very nearly! :-)
If I 'cd /sys/bus/iio/devices/iio*' I get to '/sys/bus/iio/devices/iio:device0', is there any way of knowing that it's 'iio:device0'? It's still sort of clumsy doing a Python walk to find the files. -- Chris Green ยท -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
