Honored Contributor
Honored ContributorFirst off, let me give my opinion on your data rate question... yes, you should be able to do 1080p60 at a avalon buss speed of 74.25 with the two pixels per cycle... Basically, I think, it's just a parallel pipe for another pixel. This would be a real advantage if they had bothered to define how you handle the packet signalling... things like SOP & EOP... I can believe that if the sinc is also setup for 2pixels per transmission you would be fine for the data, ready, valid signals... but I think they had to make decision as to how to handle the SOP & EOP that aren't just obvious.
Where do we get that information if we want to write some custom Qsys modules that are 2 or 4 pixels per transmission???? I have a poorly chosen device (which shall remain nameless) that needs to generate a frame doubler. I can do it with color space conversion and chroma resampling but I need to get two pixels per transmission into the frame buffer.... I've looked at using the color plane sequencer to put in two 8bit pixels and output a single 32 bit pixel... but I'm getting an error as follows: the source has empty signal of 2 bits, but the sink does not. Please insert appropriate adapter for video IP connection. the sink has empty signal of 2 bits, but the source does not. Please insert appropriate adapter for video IP connection. These two errors are happening between the Sequencer and the Frame Buffer II... So either I need to understand and fix the above errors or get the specification of the Avalon stream in regard to moving 2 pixels per transmission... david
