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I have not successfully gotten Clocked Video Output to take dynamic configuration from it's slave port. I can use the wizard to configure it, but none of the 1-14 video modes will configure.
Yes, I set them invalid before changing the settings and then make them valid. However, according to the current mode register, it stays stuck at mode 0.
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The mode register will not change until the Clocked Video Output recieves a control packet (on it's Avalon Streaming Video port) that's resolution matches the resolution in one of the configured mode banks. Have you enabled the core and driven video into it?
Also, which version of Quartus as you using? In 8.0 there is a bug in the Clocked Video Output where it selects modes incorrectly. A known example of this is if you configure it for 3 mode banks only banks 1 and 2 will be usable, bank 3 will never be selected. Upgrading to 8.1 fixes this issue.
Gareth.
Honored Contributor
