On 08/23/11 09:18, malas wrote: > > Dear Michael Hennerich, > > > I shall post iio quesris in this mail list as per your suggestions. > > AD7793 driver is built into kernel. The chip gets configured and am able to read data on > continuous mode via spi interface using ad7793 driver at kernel level. > > While testing userspace test iio-ring to read data from ring buffer, generic_buffer code > was executed, it proceeds till opening /sys/bus/iio/devices/device0:buffer0 and > Read call fails. Question 1: What's the kernel and where did you get it from? (Interfaces are moving fast so it's plausible you've fallen in a hole where userspace wasn't matching kernelspace). > > In fs I can list the iio device ad7793 with following properties get/set. > > root:/> ls /sys/bus/iio/devices/device0\:buffer0/ > bytes_per_datum enable power subsystem > dev length scan_elements uevent > root:/> > > I find access0 and event0 missing in this list. Is that the reason for read() fails. Yes. Question is why and without kernel version I don't know where to look I'm afraid. > > Please help. > > Thanks > Mala > -- > Open WebMail Project (http://openwebmail.org) > > > > -- > 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 > -- 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
