I'm looking into interfacing with the TI 84+ CE's LCD over SPI with an ESP32-S3. I have a breakout board for the FPC, but don't know where to get started with controlling the display with SPI.

I've been looking at the datasheets linked on this page: https://wikiti.brandonw.net/index.php?title=84PCE:Ports:4000, but I'm not sure how I would send data to the registers of the PL111 controller.

How does the calculator do it? It seems like some variables are memory mapped to a region that is pushed to the screen over DMA?

Any help is appreciated.
It's a little bit confusing because the 84+CE actually has two LCD controllers. The PL111 sends timing and data signals to the SPI-based controller via the RGB interface. If you want info about the SPI-based controller, there's a datasheet linked here: https://wikiti.brandonw.net/index.php?title=84PCE:Ports:D000
  
Register to Join the Conversation
Have your own thoughts to add to this or any other topic? Want to ask a question, offer a suggestion, share your own programs and projects, upload a file to the file archives, get help with calculator and computer programming, or simply chat with like-minded coders and tech and calculator enthusiasts via the site-wide AJAX SAX widget? Registration for a free Cemetech account only takes a minute.

» Go to Registration page
Page 1 of 1
» All times are UTC - 5 Hours
 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

 

Advertisement