i.MX53 user buttons trigger when touched and board ungrounded

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i.MX53 user buttons trigger when touched and board ungrounded

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SimonasL_
Contributor II

Dear all,

When I operate i.MX53 stand-alone -- only with LCD via touch-screen, have only power supply  connected and no other peripherals attached, -- boards suffers from poor grounding, by exposing hectic USER1+2 button activity:

Whenever I touch any of those buttons (no press-action involved), it starts sending pressed events at an extremely fast rate (potentially halting the running OS).

Whenever I attach a well-grounded cable (USB/µUSB, serial, VGA), this behaviour goes away.

The board is intended to be used as stand-alone, without any wires supplied and no possibility to ground it - how could the button behaviour be fixed? Soldering a capacitor did not help (it then nearly completely disabled buttons sending any action when pressed)

Many thanks,

Simonas

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Bhavana
Contributor II

Can you help me to make use of user1 and user2 keys ..so that if we press that keys some event should generated.

Thanks,