VGA output: Can SPI make and send infinite circular buffer?

[HermannSW]

Nice project.

I did a lot of experiments with DueVGA:
https://github.com/stimmer/DueVGA

A much less capable microcontroller (84MHz Arduino Due) with much less memory (96KB ram).
You may want to lookup stimmer's DueVGA code on Github for how he did.
Allows for 1024x675 monochrome and 320x240 color, only restricted by ram size.

Only 3 resistors are needed for monochrome connector, 11 resistors for color:
http://stimmer.github.io/DueVGA/

https://forum.arduino.cc/index.php?topi ... msg2575055

[ta-mat]

Hi, HermannSW
Thanks for the valuable info. Since you have a lot of experience and ESP32 has great capability, I'm sure that you can implement far far better than me. I hope community will see your superb achievement.

[ta-mat]

So far, I'm trying to use my code with "real" app. It's kinda work but way too slow (30..40fps) for 240MHz x 2 chip
Perhaps, reading from flash and/or SPI DMA drag the system.

something-esp32.gif (2.49 MiB) Viewed 5244 times