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If I draw a red or yellow color on 0,0 everything is fine. As long as the Blue bits of the pixel 0,0 are set to 0 it works.
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I put 0x0001 on the 0,0 pixel and madness happens:
https://ibb.co/gwpmgj Any help is appreciated, thanks.
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Hi Dario, in first thank to pointing me to this problem I can possibly connect to an unknown behaviour of my project.
I face similar problem on an LCD, all IP but DMA video buffer are mine, I use same IP you are using from University programme to fetch video stream from memory then feed my core.
Sorry to say I am proficient on VHDL and that IP is Verilog written. On that core I'm impaired by language I don't manage in deep.
From your second image I can infer, as other wrote to you, some garbling on HSynk and Vsynk are supposed to be the trouble but internal DMA unlock to frame can be too, synk tend to have fuzzy image with left border unstable, frame unlock tend to have good raster with worst image. From single still picture is quite impossible diagnose which one is on place.
Please can you repost image 2 best focused plus a short video of what happen.
Best regards
Roberto
Honored Contributor
