AnsweredAssumed Answered

i.MX RT1052 dev board unstable with LCD connected and XIP

Question asked by craigsmith on Jan 7, 2018
Latest reply on Jan 29, 2018 by craigsmith

Hi,

I'm finding the i.MX RT1050 dev board is quite unstable and freezes/crashes when the LCD is plugged in when running code from the external hyper flash.  I'm wondering if anyone else has seen these issues and/or can point me in the direction of a fix?

 

I have tried running the emwin, usb host, even just the hello world xip sdk projects.  They run ok, but will randomly crash and disconnect from the debugger after anywhere from 5 seconds to 30 seconds.  There is no particular place in the code where it crashes.  They will sometimes produce a hard fault breakpoint, but often not.  When debugger is disconnected and dev board reset, the same result happens (as evidenced by the image on the screen freezing (when it should be constantly changing).

 

If I physically disconnect the LCD from the dev board, everything runs as it should.  The debugger stays connected and the code keeps running!  It seems odd as the LCD is basically a passive device so the output signals are the same whether the LCD is connected or not.

 

I am using a Kyocera 4.3 LCD which is compatible with the Rocktech LCD sometimes supplied with the dev kit.  It is powered using the DC jack with external supply.

 

I'm wondering if anyone else has seen these issues and/or can point me in the direction of a fix?

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