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Altera_Forum's avatar
Altera_Forum
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15 years ago

Video Clocked output and VGA

Hi all. I am using a DE2 , and I am trying to show RGB test pattern generator on the VGA. I am using vip to genereate the colour bars, but i have not benn able to fully understand the way VCO wo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

yep.

using the test pattern generator all systems works fine.

The problem is when I try to use the CVI (with the ADV on board), I am not able to have a good image on output, maybe i use wrong fifos settings for cvi and cvo.

I tougth that without using buffers in the deinterlacer, the system would have work properly, but it seems i was wrong. I know I am wrong, but i don't know exactly WHERE.

Anyway, the board you are using has different components from mine (in example, i am SURE i have an SDR sdram, maybe your board ha a DDR sdram?) so maybe my settings would not work properly on your project.

Another consideration about your project: what reolution do you wanto to achieve as output VGA?

you should configure clovked video output with correct timings and pixel clocks in order to work properly, and i Think that @ 60Hz 640*480 27Mhz is not the correct pixel clock... ;)