You probably need to elaborate your question a bit... Especially you should clarify what you meant by "every code (written by matlab) embedded in black box"...
In general, there are two ways to include your HDL in your DSP Builder design:
- via HDL import... As long as your HDL only utilizes certain subset of megafunctions then the tool can automatically generate a Simulink simulation model for you (so you can simulate your HDL inside your Simulink model as well).
- via Explicit blackboxing... In this case, you can black box your HDL. The caveat is you are responsible for writing your own Simulink simulation model...
