How write data from core to frame buffer

Goood Morning,
i have need, as hobby, to write from core versus a frame buffer a lot of data ( array, typically ).
Can you help me with a piece of code core-side ( etask ) and processor-side ( main.c ) ? 
Thank's in advance.
Paolo Bianchi ( from Rome ).

P.S.: my e-mail is:
pbianchinet@libero.it
