adv7343 problem

this is the picture :

and this is what I am sending :

i am sending in ntsc so i am using the settings that are in -()-

it is in black and white because i cancel chroma in the settings.

The scope wave from looks good.  Try turning off the Chroma in the ADV7343.  0x84[4] = 1

GuenterL wrote:

The scope wave from looks good.  Try turning off the Chroma in the ADV7343.  0x84[4] = 1

The picture is after chroma cancellation "it is in black and white because i cancel chroma in the settings."

The protocol that I am using is good ?

Looking at the scope, I see two complete horizontal lines.  The first line is black about 2/3 away across then white the remaining 1/3.  The second line is white the first 1/3 of the line and black the remaining line.  The left half of the image is generated by the second scope horizontal line and the right half of the screen is generated by the white part of the first scope horizontal line.

From the scope it looks also like the horizontal line after the second complete is all black.  This would produce product a complete black line across the entire screen. 

It appears the screen shows exactly what the scope shows so the problem is the generated 656 stream has incorrect video in the active region.

What is the data between the SAV and EAV.  All you show above is the blanking area which should be black

the data stream is as flowes:

i am using :

1. Mode 0 (CCIR-656)—Slave Option with h_sync,v_sync and blank tide up
2. chroma is off -  i want a black and white picture
3. using dac 1

i would like it if you could have gave me an example for data stream of one frame so i could compare it to mine

Please get the book Video Demystified

Video Demystified: A Handbook for the Digital Engineer, 5th Edition: Keith Jack: 9780750683951: Amazon.com: Books

It explains all the requirements of BT.656 encoding.

If you are truly doing 525i or 625i over an 8-bit bus then the clock should be 27MHz.

The table above does not match the monitor image above.  both active video regions are white.  The display is showing interleaved black lines with the white ares and the scope does not match the table either.

The table should produce a solid white screen.