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DM6467 codec engine

I have two boards. one is the SDI's dm6467 evm, another is made by myself.

The DSP on evm is dm6467czut and my one is dm6467czut7.

The problem is the code which works good on the EVM board cannot work on my board.

when the code run to the function :

hEncode = VIDENC1_create(hEngine, codecName, params); (file:Venc1.c)

it stops and doesn't return.

Is there any difference between dm6467czut and dm6467czut7?

Thanks!