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Instantly Drawing Custom Fonts with RA8875
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Instantly Drawing Custom Fonts with RA8875

by phonebymako on Thu Jan 07, 2021 8:28 pm

Hi,
I'm quite new to these types of LCD panels, so sorry if I struggle to understand things. I recently purchased an RA8875 800 x 480 LCD display. By removing the virtual size_t write in the .h file of the RA8875 library, I was able to draw custom fonts. However, there is a scrolling effect for the fonts even though it's not present for other shapes. I was wondering if there was some way to send the custom font to onboard RAM inside the RA8875, but not sure how to do that. The main thing I'm trying to do is to draw the screen instantly, including the fonts. Any help would be appreciated.

phonebymako
 
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Re: Instantly Drawing Custom Fonts with RA8875

by adafruit_support_mike on Thu Jan 07, 2021 9:52 pm

The RA8875 does have internal memory for custom bitmaps, but we haven't done any work with it. There's also an interface for an external Flash chip to work as ROM for a character set, but again, we haven't tried using it.

The relevant information is in the RA8875 datasheet:

https://cdn-shop.adafruit.com/datasheet ... 19_Eng.pdf

adafruit_support_mike
 
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Please be positive and constructive with your questions and comments.