On 24/03/16 09:56, Daniel Baluta wrote: > On Thu, Mar 24, 2016 at 11:43 AM, Linus Walleij > <linus.walleij@xxxxxxxxxx> wrote: >> If no channels are enabled when we run generic_buffer on a >> device, well then just enable all of them, run the sampling >> and disable them all again afterwards. >> >> This is extremely useful when I'm low-level testing my >> sensors with interrupts and triggers, sample session: >> >> root@Ux500:/ lsiio >> Device 000: lsm303dlh_accel >> Device 001: lis331dl_accel >> Device 002: l3g4200d >> Device 003: lsm303dlh_magn >> Device 004: lps001wp >> Trigger 000: lsm303dlh_accel-trigger >> Trigger 001: lis331dl_accel-trigger >> Trigger 002: l3g4200d-trigger >> >> root@Ux500:/ generic_buffer -c 10 -n l3g4200d >> iio device number being used is 2 >> iio trigger number being used is 2 >> No channels are enabled, enabling all channels >> Enabling: in_anglvel_x_en >> Enabling: in_anglvel_y_en >> Enabling: in_anglvel_z_en >> Enabling: in_timestamp_en >> /sys/bus/iio/devices/iio:device2 l3g4200d-trigger >> -3.593664 -0.713133 4.870143 946684863662292480 >> 3.225546 0.867357 -4.945878 946684863671875000 >> -0.676413 0.127296 0.106641 946684863681488037 >> -0.661113 0.110160 0.128826 946684863690673828 >> -0.664173 0.113067 0.123471 946684863700683593 >> -0.664938 0.109395 0.124848 946684863710144042 >> -0.664173 0.110619 0.130203 946684863719512939 >> -0.666162 0.111231 0.132651 946684863729125976 >> -0.668610 0.111690 0.130662 946684863738739013 >> -0.660501 0.110466 0.131733 946684863748565673 >> Disabling: in_anglvel_x_en >> Disabling: in_anglvel_y_en >> Disabling: in_anglvel_z_en >> Disabling: in_timestamp_en >> >> Pure awesomeness. If some channels have been enabled through >> scripts or manual interaction, nothing happens. >> >> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> > > Indeed. This is very useful! > > Acked-by: Daniel Baluta <daniel.baluta@xxxxxxxxx> > > https://imgflip.com/i/11cof2 :) It's extremely useful on devices where all the channels can be enabled. Unfortunately the possible channel sets are not exported and for quite a lot of devices you cannot configure reading all channels at once. Look at the more complex available_scan_mask options that exist or anything with the onehot callback used. How about doing it on a parameter so -a (if not used - can't remember) for enable all channels? Then it won't do weird things unless someone foolishly enables it on a device where you can't have buffered access to all channels at once. Jonathan > > thanks, > Daniel. > -- 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
