VGA driver ?

jumjum123
Posts: 188
Joined: Mon Oct 17, 2016 3:11 pm

VGA driver ?

Postby jumjum123 » Sun Mar 05, 2017 9:57 am

Is anybody working on a VGA driver ?

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kolban
Posts: 1683
Joined: Mon Nov 16, 2015 4:43 pm
Location: Texas, USA

Re: VGA driver ?

Postby kolban » Sun Mar 05, 2017 4:45 pm

Howdy,
With respect to this article:

https://en.wikipedia.org/wiki/Video_Graphics_Array

Can you elaborate on what you mean by "VGA"? Are you looking for circuitry and software to allow an ESP32 to drive a VGA compatible desktop monitor or projector?
Free book on ESP32 available here: https://leanpub.com/kolban-ESP32

WiFive
Posts: 2692
Joined: Tue Dec 01, 2015 7:35 am

Re: VGA driver ?

Postby WiFive » Sun Mar 05, 2017 5:25 pm

I would guess he means something similar to https://github.com/smaffer/vgax but boosted by esp32 horsepower

jumjum123
Posts: 188
Joined: Mon Oct 17, 2016 3:11 pm

Re: VGA driver ?

Postby jumjum123 » Sun Mar 05, 2017 7:06 pm

@kolban, I would like to connect a VGA Monitor to my ESP32.
ESP32 has to support VSync, HSync and r/g/b for 7 colors.
If RGB is too heavy, I would start with b/w.
HW should not be a problem, some resisitors to create a "levelshifter" should work.
Creating syncs is not the big problem. But how would we create pixel data.
There are some ideas using SPI on specified frequency to support at least black/white.
@WiFive, I'll take a closer look to the arduino port. If Arduino can do, there should be a way for ESP32

erhardd
Posts: 17
Joined: Mon Dec 05, 2016 9:16 am

Re: VGA driver ?

Postby erhardd » Sun Mar 05, 2017 8:18 pm

Only a hint:
You should take a 8-bit IF for GLCD and merge together
Image
with this
https://esp32.com/viewtopic.php?f=19&t=702
look also
http://www.jcwolfram.de/projekte/avr/ch ... 2/hard.php
and:
https://www.mikrocontroller.net/topic/377963#4292846
A lot of work I think..

LinusK
Posts: 1
Joined: Wed Feb 06, 2019 2:10 am

Re: VGA driver ?

Postby LinusK » Wed Feb 06, 2019 2:38 am

For everyone wanting the same and finding this thread:
There is a youtube video on this topic that achieved some impressive results using out of specs I2S stuff: https://youtu.be/G70CZLPjsXU

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