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Altera_Forum
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11 years ago

VGA problem with DE2-115

Hello, I have a functional VGA module working on DE0. This same VGA module also works on another board (Mercurio IV) that has a Cyclone IV. Today, I've tried this module on a DE2 and on...
Altera_Forum's avatar
Altera_Forum
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11 years ago

Problem solved. A careful read on DE2-115 manual and I've discovered that it does not use the traditional resistor ladder but a dedicated DAC.

So for those with the same problem, read the manual and the DAC's datasheet and control the signals VGA_CLK, VGA_BLANK_N and VGA_SYNC_N.

blank <= hs and vs;

sync <= '1'; -- or maybe video_on where video_on means when pixels are in the visible area