Honored Contributor
Honored ContributorHi,
I am also facing the same problem what hyattbd was facing. I am using an HD camera to connect it to Cyclone III starter board through an HSMC connector. 1280X720@50Hz (input clock rate 74.25MHz), the design path is CVI ---- FRAME BUFFER -----CVO. CVI input frequency is 74.25Mhz and CVO output frequency is 74.25MHz. Rest of the design including DDR are running at 133MHz. I set the Port width of frame buffer to 32 and the fifo depths to 256 and left the burst targets at 32. Settings are saved but my video is torn across the display. When I set the port width to 256 and leave the fifo depths and targets at their defaults then also i get torn video. i made the above changes as "hyattbd" design worked when he made those changes. It looks to me like some arbiration problem and seems data in the DDR is getting overwritten. i would appriciate if any one can help me on this.
