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CSoil's avatar
CSoil
Icon for New Contributor rankNew Contributor
7 years ago

Cyclone V using TPG -> CVO, Mode match is not behaving correctly, but I am getting video out

My c code sets the parameters for mode 1 as the data sheet states, and video output functions, but when I read the Video Mode Match register, I get garbage instead of the expected 0x00002. When I ...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
7 years ago

Hi,

As I understand it, you observe some issue with the mode match register of the CVO which seems to be reporting incorrect values. However, the video output is still functioning OK. Mind further elaborate on the value that you have read back from the register during issue occurrence?

Just would like to check with you if you have had a change to perform a Modelsim simulation to see if can replicate similar observation? This would be helpful to further narrow down functionality related issue.

Just would like to check with you also if you use the CVO in the default mode configured during IP instantiation, is the ​mode match register behave correctly ie reading value of 0?

Just would like to check with you also if you have had chance to try with other Mode to see if it is specific to the Mode 1?

Thank you very much.

Best regards,

Chee Pin