Hi On Tue, Dec 17, 2013 at 10:28 PM, <simon@xxxxxxxxxxxxx> wrote: >> Hi >> >> This implements the recently discussed ABS2 API. It's working fine on my >> machine with libevdev. Comments welcome! > > Just looking at the documentation file, I have a couple of suggestions. > > 1). Make a note on the direction of gravity wrt the example image. Ie what > which axis/value will be positive with the device laid flat/stationary on > a desk. Might just prevent some confusion later. Yepp, can add that to the Accelerometer section. > 2). Calibration, Accels and Gyros are noisy in different ways. Gyros tend > to be wrong in the long term, giving some consistant bias which should be > calibrated out. Accels are noisy in the short term, but generally right > over a long period. I'm not entirely sure where to put calibration/normalization. Letting user-space deal with that should simplify things a lot. We could even add it to libevdev. Comments welcome.. > Am I correct that the event framework will provide time-stamping of data, > thus making computation of relative movements possible. Yes, part of the evdev API. Thanks David -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
