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Altera_Forum's avatar
Altera_Forum
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10 years ago

VGA monitor

Hi guys. I am trying to connect altera de2-115 board with VGA monitor. My coding was sucessful with no error. But, I have problem when downloaded the coding into fpga. Here is the problem (att...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

You could check the sync signals with a scope too. 29Hz seems a bit low for the vertical sync rate. Doubling both frequencies would be a bit more in the correct range for a 640*480 VGA signal, so I wonder if your vga_sync entity isn't expecting a clock at a rate that is the double than the current value.