On Fri, Aug 7, 2015 at 11:36 AM, <[email protected]> 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: [email protected] 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. Regards, -- Robert Nelson https://rcn-ee.com/ -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
