On Thu, Jun 21, 2012 at 2:53 AM, Belisko Marek <marek.belisko@xxxxxxxxx> wrote: > Hi, > > I'm runnig 3.5-rc2 kernel on my board with hmc5883 magnetometer. > I've check iio documentation but cannot figure out how to read data from > device. Node /dev/iio:device0 is properly created. > I try both test programs: generic_buffer and iio_event_monitor but > both gives me an error: > iio_event_monitor: > ./iio_monitor hmc5883 > Found IIO device with name hmc5883 with device number 0 > Failed to read event from device: Bad file descriptor > > IMO this is because hmc5883 don't have event_attrs set and then this fail. > > generic_buffer: > ./generic -n hmc5883 > iio device number being used is 0 > Failed to find the trigger hmc5883-dev0 > > Not sure about that one but seems trigger is missing (hmc5883 use > INDIO_DIRECT_MODE) > > Is there other way how to read data from device or only possibility is > by reading sysfs (no polling ?) ? > Or it is just simple open device -> sleep on poll and when wake -> read data? If that is all you need how about doing that in userspace? > > Thanks in advance, -- 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
