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Altera_Forum's avatar
Altera_Forum
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15 years ago

about VGA display

Now,I am puzzled at VGA display,I look trough signaltap,and I am sure the vs,hs are right,and RGB signals show up in active period(maybe the RGB is not the correct image data,but the RGB is not all z...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

thanks for your reply~

Now,I am using DE2 board , when I configure A/D chip(ADV7181) using the files (I2C_Controller.v,I2C_AV_Config.v),ADV7181 always back "ACK" high level,that means FPGA cannot comminicate with ADV7181,and I am sure ADV7181 is OK.

so, I write a simple I2C confiuration programme ,ADV7181 back "ACK" low level,that says I2C confiruration success,but I donnot understand why using the demo I2C configuration programme is always unsuccessful??