serial communication in AT89c51

hello sir i have 8 bit data which is coming from ADC0808 this is taken into the AT89c51 micro controller via port P0 now i want to transmit this serially so i have to place data into SBUF (for this please send the C code)....

and after that i received some data serially into SBUF now i ahave to show this data on port P2( for this please send the C code)

i used this code:

SBUF=P0    /// to transfer port dat into SBUF
P2=SBUF // to transfer SBUF data into port 2<pre/>

  but it is not working