how to set parity bit and stop bit

On a C51:

1) You always get one stop bit.

2) To do parity set up the UART for 9 bit data.

#include <reg51.h>

void SendCharWithParity( char Data )
{
   ACC = Data;
   TB8 = P;  //PSW.P = even parity of ACC
   //TB8 = ~P;  //odd parity
   SBUF = ACC;
}