We've designed a product which uses a BeagleBone Black with a resistive touch screen. The BBB controls some external hardware which is designed to generate large amounts of EMI. When gating is on, the hardware resonates at around 200 kHz, most likely with large amounts of harmonics. When gating is off, the hardware is off and not generating substantial EMI.
At the moment gating is enabled, the EMI starts and the touchscreen gets a phantom press. Gating can be as low as 3 Hz (50% duty cycle?) and you can hear a "tick tick tick" sound at 3 Hz. At every "tick", the cursor jumps to a random position. At 100% duty cycle or at very high gating frequencies, the touchscreen behaves normally. Is there a way to disable touchscreen sampling for a short time period when the gate signal (generated by the BBB) is asserted? -- 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.
