I have source code for rcm3200, is that possible i using that code for rcm6700??
Short answer- No.
Long Answer - Maybe.
It really depends on what the code is doing and on how the hardware features it is using on the RCM3200 map to the available hardware on the RCM6700. You may find that large parts of the code will port across without too much change but that the bits directly involved with talking to the hardware will need more radical changes.
It really depends on the code in question and how specific it is about hardware usage.