The power rails are solid, to our knowledge. The BBB has been powered from different power supplies than the EMI generating hardware as well as a battery. Our scope captures don't show anything definitive on the power rails, but it is kind of clouded by the fact that the scope is affected by the EMI as well. My cell phone's capacitive touchscreen, unplugged and 15 feet away, goes haywire when this EMI monster is turned on.
On Wednesday, July 2, 2014 10:49:07 AM UTC-5, Charles Steinkuehler wrote: > > On 7/2/2014 9:08 AM, [email protected] <javascript:> wrote: > > > > Is there a way to disable touchscreen sampling for a short time period > when > > the gate signal (generated by the BBB) is asserted? > > Probably, but I'd try to fix the hardware first. > > It sounds like the EMI itself isn't directly causing the phantom touch, > but the act of turning the EMI generator on causes the problem. I > suspect you have some nasty spikes getting into the power rails that > could cause you problems in the future. At the very least, I'd want to > understand the mechanism causing the phantom touches before just > assuming they are harmless and masking them via software. > > -- > Charles Steinkuehler > [email protected] <javascript:> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
