One for the PIO gurus


Author Message
Volhout

Guru

Joined: 05/03/2018
Location: Netherlands
Posts: 6112
Posted: 11:54am 04 Nov 2025      

I am tired,

This is the XXX'th occurence of me posting something, and after pressing SAVE, nothing is saved. Not sure what it is with this forum, but it is tiring.

Anyway. Previous version (not this last one, have not tested yet).

- timing is not correct, my monitor does not autosync. Sample frequency must be 38% (scale 0-100) and offset 55%(scale 0..100). RP2040 VGA is 50%/50% which is perfect for this monitor.

Looking at the waveform:
RP2040 VGA : falling edge VSYNC and HSYNC are at same time.
This code: The HSYNC is delayed versus the falling edge of VSYNC.

Later today I can try to check your new code. I am in meetings right now.
Work is dominant at the moment....

Volhout