Reversed Image on LCD - BeagleBoard-xM Display Panel ULCD7

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1

Hi there,

I have an issue with my screen display. I purchased the Beagleboard -xM and the Angstrom OS build (pre-built).
So I haven’t done anything novel or contentious with the OS.

The LCD was purchased from digikey as shown.
http://www.digikey.com.au/catalog/en/partgroup/beagleboard-xm-display-panel-ulcd7/15428

Despite whichever OS I boot up with and use, the image appears reversed, with text and images from
right to left. (Much like Hebrew)

Has anyone come across this issue and how do I overcome it?

Thanks.

2

Not sure why it is. There are resistors on the board that set this function.

http://elinux.org/CircuitCo:BeagleBone_LCD7#BeagleBone_LCD7_Revision_A3

This was an issue with older XM SW. Not sure if you got the latest or not.

Gerald

3

I’ll look into this possibility. So as I understand, that the resistor may be a “pull-up” or “pull-down”, that sets a logic
level and hence the inversion?

4

Had the same exact problem.
Downloaded the Angstrom 01-11-12 image from

http://elinux.org/CircuitCo:BeagleBone_xM_LCD7

and wrote the microSD using a terminal on my Mac. The updated image corrected the screen orientation and made the touchscreen work.