DM8148 VIN1B problem

Ian

Hello,

I'm using the VIN1B port to capture 8 bit BT 656 video from an Analog Devices codec. I've verified that the codec has detected the incoming video correctly, and is generating the correct 8 bit data stream (as far as I can confirm with some assumptions on what the VIN1B port is expecting...).

The codec is configured to output sep. syncs as well as embedded for verification and I can confirm the correct CLK, H and VSYNC signalling.

Unfortunately, the VFCC test app never receives a frame. It configures correctly as an 8 bit port, but then waits on data to fill the buffers.

One thing I've not been able to clarify though from the reference schematics is whether the "DE" signal needs to be tied high even if using embedded syncs? Right now we don't utilise DE/FLD and rely on embedded syncs.

Has anyone been able to get the VIN[0/1]_B ports running? Any special steps or versions of OpenMax that you had to use?

Thanks

Ian

over 13 years ago

0 Sivaramkrishna Neeruganti over 12 years ago

Intellectual 870 points

Hi Ian ,

Are you able to capture bt.656 stream on PORTB with the OMX application ? Can you share what you have done for bt.656 capture on PORTB?

Thanks,

N Sivaramkrishna .

0 Ian over 12 years ago in reply to Sivaramkrishna Neeruganti

Prodigy 130 points

Unfortunately I was stalled waiting on a response from TI's factory on the issue so had switched to another task in the mean time. I'm expecting to pick this up again in few weeks.

Ian

0 Sivaramkrishna Neeruganti over 12 years ago in reply to Ian

Intellectual 870 points

Hi Ian ,

Any update on bt.656 capture on PORTB using OMX application ?

Thanks,

N Sivaramkrishna .

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DM8148 VIN1B problem