Hi,
Rappid Init can be used for initialization of modules. But notice, that it does not contain drivers.
https://www.nxp.com/webapp/Download?colCode=RAPPID_INIT_MPC564XB
Examples can be found here:
MPC5 software example list
Unfortunately there's not a lot of examples directly for MPC5646C but code from others may be reused. A lot of them will be pretty much compatible.
I will also attach a couple of others I found in my repository.
Lukas