ADV7181B and Clocked input megacore function

Altera_Forum · ‎03-30-2010

Hello

could somebody help me?

I need to interface the adv7181B (with an YCbCr 4:2:2) with the Clocked Video Input function, but I have no idea about the settings I have to use.

I think that i need to load the PAL presets, but the output from the adv is 8bit wide, the CVI needs 10bit. I've tried to put the V_sync and H_sync on the same bus, but it doesn't seem to work.

Any hint, please?

Altera_Forum · ‎03-31-2010

Currently, I set CVI as 8 bit and embedded sync format.

I've set vid_datavalid as vcc, but all that i get is onle a black screen.

So, i've tryed to set CVI as 8 bit and separate sync format, but still, using vid_datavalid as vcc it does't work.

Output from the video conerter, in 4:2:2 YCbCr there are only

TD_DATA[7..0]

TD_HS

TD_VS

TD_RESET

TD_CLOCK (@27MHz)

I REALLY don't know how to interface them correctly with the CVI.

Any hint wold be precious..

Altera_Forum · ‎04-01-2010

..............up.............

Altera_Forum · ‎10-21-2010

I think "Vid_datavalid" should be conncet to a pin that is low level when Vertical Blanking Interval,and hight when signal is valid.Just like PIN "RTS" in SAA7113.

Altera_Forum · ‎10-21-2010

oh, thanls for your reply.

Right now, I "resolved" that problem long time ago!

Altera_Forum · ‎02-11-2011

@Phate,

May I ask how you have solved this problem? When I use the Test Pattern Generator (YCbCr, 8 bit, 4:2:2, Interlaced, Sequential) I get a correct image on the screen, so all the components between the generator and the VCO are correct. When I attach the TV Decoder, i just get a black (or grey) image, with a correct sync on the screen (well, most of the times).

I use the following signals with embedded sync signals:

TD_CLK

TD_DATA

TD_RESET

vid_locked and vid_datavalid are tied to VCC. Is this correct?

Any help would be appreciated!

Altera_Forum · ‎02-18-2011

Hi,

right now, I don't remember how I did; there should be a couple of posts in this forum where other users helped me. If I find them, I link them.

Anyway, I should have sources at home.

Phate.

Altera_Forum · ‎02-22-2011

Hi Phate,

Thnx for your reply. I switched to the University Program cores, they just do the job perfect.

Altera_Forum · ‎06-15-2011

hi, phate ,how di you solve this?can you help me?