I have connected RA8875 to UNO, MEGA and DUE successfully and have no trouble putting textt on 800x480 screen. I am putting data from sensors on this screen and want to update data results areas. When I try to overwrite, the old data does not disappear - it writeew pixelsover old pixels. Does this controller not overwrite data text memory? If not, is there a way to clear a small area of existing data? I have tried sending " " to a location with no success. sending ascii 13 (space) and several other similar things and none seem to work. Am I missing something really fundamental with this controller? Help or suggestions are much appreciated.
I suspect you have to draw a rectangle over the old text first.
Also have a read here:
First, Thanks for the reply.
I have about 20 places for updating data - do I put rectangles aroung each or a giant rectangle on the entire active screen? Then if I do that, do I just go back to Text and try to update or is it more complicated?
Just updated my post as you replied. Have a read as it may provide a solution for you.
You can draw a giant rectangle, but that would mean rewriting all the text each time.
Thank you so much. I used the testColor method as in you post above and it worked right out of the box. I now using a DUE and I can't tell the speed difference with the extra line of code. I really appreciate your help.
Joe
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