// standard header files for ascii IO functions,// ascii manipulation functions#include  <stdio.h>     #include <ctype.h>#include  <stdlib.h>    void serial_init (char brg, char lo_speed);void serial_init(char brg, char hi_speed){  // setup Async communication   TX9 = 0;  TXEN = 1; // transmit enable  SYNC = 0; // async mode   if (hi_speed)   BRGH = 1; // hi speed mode   else BRGH = 0; // lo speed mode   SPBRG = brg;    bitset(TRISC, 7); // RC7 input    bitclr(TRISC, 6); // RC6 output   RX9 = 0;  // 8-bit reception    SPEN = 1; // serial port enable    CREN = 0; // clear enable first   CREN = 1; // now enable first }