Hi Michael, > -----Original Message----- > From: Michael Welling [mailto:mwelling79@xxxxxxxxx] On Behalf > Of Michael Welling > Sent: Tuesday, May 19, 2015 4:30 PM > To: Greg Wilson-Lindberg > Cc: linux-iio@xxxxxxxxxxxxxxx > Subject: Re: BBB touch screen and ADC interactions > > On Thu, May 14, 2015 at 10:00:14AM -0700, Greg Wilson-Lindberg wrote: > > > > I'll try out a new (4.0 - 4.1) kernel, but we are using QT > to generate a GUI and I don't know if the graphics that we > need have been ported to the mainline yet. I guess I'll find > out the hard way. > > > > Have you had any luck getting the new kernel to work? > > I would like to know if you are experiencing the unexpected > release events that I experienced with the touchscreen. > I just got the 4.1 kernel working today. Our application is running just fine, so all of the QT stuff is working. I found that when running my IIO ADC read program on the 4.1 kernel, not only do I lose the touch screen, but mouse clicks stop working, and the cursor periodically jumps. I also figured out that I wasn't disabling the channels when my ADC program exited. When I got it to properly exit and disable the IIO ADC channels, the mouse started working again. I then booted back to a 3.14 kernel and while the touch screen stops working while I am reading the ADC channels, the mouse still works normally, and the touch screen starts working again when the IIO program exits. It appears, for me at least, that the 4.1 kernel is not an improvement. I don't need fast reads on the ADC, I may be able to get away with enabling the ADC channels, reading some values, and disabling them again every once in a while. I guess I'll have to try that. - Greg > -Michael > > > Thanks for the information, > > > > Greg > -- 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
