Search found 25 matches

by wfriedrich
Mon 2020-08-10 3:00
Forum: VS23S010 Forum
Topic: Protoline voltage levels
Replies: 2
Views: 1077

Re: Protoline voltage levels

Hello Panu, Thanks for the information, as usual super helpful and gives a lot of insights into the chip. There might be a slight miss-understanding with my schematic. It is basically a dual purpose, I want to use it either as 4x composite video output, R16 and the load resistor R28 and all the comp...
by wfriedrich
Thu 2020-07-30 3:04
Forum: VS23S010 Forum
Topic: Protoline voltage levels
Replies: 2
Views: 1077

Protoline voltage levels

Hello Panu and team, Is it possible to select more than 3 voltage levels in a protoline during the non-picture period. I understand how to create blank-level, black-level and sync-level. if I add another value, will it just create one more voltage step? E.g. 0x0000 for sync, 0x0037 for blank, 0x0042...
by wfriedrich
Sat 2020-03-21 23:18
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Challenge accepted! 8-) And it is done. https://cdn.hackaday.io/images/5481571584825012268.jpg I made a board as a Arduino Shield/Feather Wing, that should be able to output VGA or 4* Composite video. As @Panu suggested, soldering was amazingly easy. I use some low-temperature solder paste and a bo...
by wfriedrich
Fri 2019-03-22 1:42
Forum: VS23S010 Forum
Topic: A few VS23S040 questions
Replies: 9
Views: 4171

Re: A few VS23S040 questions

Hello Panu and jockm,
Very interesting discussion.
Side question to #3:
Is the PLL in the VS23S010 and VS23S040 identical? If I have a stable VGA demo (single colour or grey scale) on my VS23S010 Arduino shield, would it transfer 1-to-1 to the S040?
Thanks,
- Wolfgang.
by wfriedrich
Mon 2019-02-18 5:28
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Panu, Hannu, I made some progress and have a stable 640x480 @60Hz frame sometimes. Sometimes my monitor does not sync. Not sure why, maybe it's the cable, as my SYNC wires don't have a nice GND. I also could see grey levels when I added some pattern into protoline 0. But as soon as I try to set pic ...
by wfriedrich
Tue 2019-02-12 19:02
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

The HSYNC width is copied straight from your code vga.c line 193. But it seems to be correct as the scope image show. Next problem to solve: The alignment von HSYNC to VSYNC and number of lines. I probably won't have time before the weekend (unless I get snowed in at home without power outage tomorr...
by wfriedrich
Mon 2019-02-11 18:06
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Hannu: You have had nice progress. If you get HSYNC and VSYNc right, you have half of problem solved. Next is the blank level on the front and back porches. I hope you have level shifters between VS23S and arduino. VS23S doesn't like 5 volts. Yes, I have level shifters, schematics can be found at my...
by wfriedrich
Sun 2019-02-10 22:46
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Hello Panu, I'd be very very happy to see any screenshots/oscilloscope traces from you! I used the defines from your VGA demo code with 100 visible pixels and 480 lines in a 800x525 frame (setup for 640x480image) Here are some plots attached: tek00000.png Image 00000: Shows 2 VSYNC pulses with nice ...
by wfriedrich
Wed 2019-02-06 15:49
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Challenge accepted! 8-)
by wfriedrich
Tue 2019-02-05 19:00
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 10678

Re: VS23S010 and VGA monitor

Thanks for the rambling. This gives sometimes better food for thought. Because now I am dreaming:idea: to hook up a 5MHz crystal for a 40MHz PLL clock and try to squeeze 800 x 600 x 2bit out of the chip. For now I make due with my current setup with the PAL crystal, the VSYNC looked OK already on th...