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Altera_Forum's avatar
Altera_Forum
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16 years ago

VIP Control is Mutilating my Image!!!

Hello All, I have an interesting problem. I've managed to put together a video processing path: cvi->scaler->frame buf->cvo Which works reasonably well scaling SXGA to SVGA for displa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Here is a screengrab from SignalTap. FYI, my path has 3 colour planes in parallel 4bits wide each. I tapped the input to the scaler, which below the CVI in the system. Looks like the control packets are ok:

- width = 0x04F9= 1273 pixels which is acceptable - (but should be 1280 strictly)

- height = 0x0400 = 1024 lines which is perfect

- interlacing field = 0x2, progressive which is correct.

The packets are consistent, but only occur once, when the VIP is turned on, shouldn't these occur more frequently? Or does a control packet only occur when there is a change in settings?

I'm going to re-introduce the control port on the scaler, then tap it's output, then successively each downstream.