Mirrored and duplicated GUI on LCD

[wongalex499]

Hi there,

I am currently developing with the i.MX RT1050 Evaluation Kit and developing the GUI.

This is the emWin example provided by the SDK, emwin_gui_demo. It runs perfectly on a 4.3-inch LCD which the resolution is 480x272.

However, when I switch it to a 7-inch LCD, the problem occurs as shown in the attached image.

The whole GUI is mirrored and duplicated. Besides, there is a black region left and the GUI could not fill it.

Is there any method that I could try to solve it?

[wongalex499]

The resolution of the 7-inch LCD is 800x480.

[jeremyzhou]

Hi Alex Wong ,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
I think I need to know more information about the phenomenon, so whether you can introduce what modification did about the  emwin_gui_demo, in further, I'll appreciate a lot if you can share the schematic of the 7-inch LCD.
Looking forward to your reply.

Have a great day,
TIC

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[wongalex499]

Hi Jeremy,
Actually I didn't modify much on emwin_gui_demo. Only int k = LCD_SetSize(800,480); is added into emwin_gui_demo.c for changing the physical size and send k to the terminal to check whether it runs successfuly or not.

Also, the loopDivider is set to 39 and post divider is set to 4 for the LCD.

Thank you.

Alex

[wongalex499]

Hi Jeremy,

The problem is solved. It occurred due to a wrong setting in the LCD timing and buffer size.

Thank you for the replay.

Alex