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Altera_Forum
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10 years ago

Duplicating Avalon ST Video Stream - Color Plane Sequencer or Avalon-ST Splitter?

I have a design right now that duplicates Avalon-ST video streams using a string of color plane sequencers and I was wondering whether there is an advantage to using the CPS over the dedicated Avalon...
Altera_Forum's avatar
Altera_Forum
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9 years ago

You have a few options, really:

1. Pause the video stream for a little bit and do a memcpy() from the frame buffer's memory location, retaining your current video path structure (have seen this done successfully)

2. Split the stream and add a DMA that writes frames to memory, using the splitter and (M)SGDMA

3. Implement your own frame buffer using the (M)SGDMA which can "steal" a live frame while continuing to operate (you'll have to repeat one frame to make up the difference)