Well, even so there are many who want to utilize the hardware multicast facility within the Epiphany, no example implementation is yet given.
I've implemented a simple store multicast (no DMA!), which is sufficient for my use case.
Seeing that there is just the manual for the multicast, I'm willing to share my implementation here.
Further enhancements to reduce the burden of the (very slow!) standard epiphany libs:
1) light-weight implementation of the hardware barrier
2) light-weight inline-methods for the config/status/counter registers
3) ... and as descriped, the support of the multicast
My code can be found on GITHUB:
https://github.com/psiegl/parallella_multicast
Sincerely
Patrick