I use SystemView for my Masters project. I had to create some DLL or tokens to simulate a 3G speech codec but I only managed to get the decoder to work and that was all programmed in C.
I recall you can built a whole DSP system using their tokens and also you can generate VHDL code as well. If anyone require tutorial notes, I manged to extract some notes from my dspedia CD. It also has some notes or tutorial in advanced DSP system.