I am posting 2 video of the same setup but with different LCD
First one is working great(I have increased the frames for slow motion on the first)
The first one is 4.3" MINDAS TFT 480x272
The second is 7" 800x480 TST070CBOT-01P TFT

 

It would seem that the images are consistent, i.e. we are seeing the same pattern. I am going to guess that this is a memory addressing problem and the memory showing the desired colour bars are being written over.

Moreover, it appears to be differences in the colour mapping between the two displays.

 

480x270 LCD needs 388,800 bytes of graphics memory
800x480 LCD needs 1,152,000 bytes of graphics memory

Is there enough memory allocated for the LCD?

 

480x270 LCD needs 388,800 bytes of graphics memory
800x480 LCD needs 1,152,000 bytes of graphics memory

Is there enough memory allocated for the LCD?

Yes, The system has 8 Megabyte of available SRAM.

 

It would seem that the images are consistent, i.e. we are seeing the same pattern. I am going to guess that this is a memory addressing problem and the memory showing the desired colour bars are being written over.

Moreover, it appears to be differences in the colour mapping between the two displays.

No Progress till now, Is there any more clue we can work on?

 

No Progress till now, Is there any more clue we can work on?

Yes. Write your own test code to check that you can access the LCD correctly.