SPI on Gr64 (porting from GR47 to GR64)

Hello,
I am porting our application from a Gr47 to Gr64.
On Gr64 I cannot find nothing related to SPI(GR47 spic/spis functions are no more supported)…
Do I have to write my own code to use SPI(and manage our SPI flash memory) or there is some example script already written?

Thanks in advance,

Best regards.

A. Giuliani
Spei2000 s.r.l.
spei2000.it