#include	<pic.h>

#define CP0		0x1010
#define CP1		0x2020

#define DATA_EEMEM_PROTECT_DISABLE 0x0100
#define XT_OSC 0x0001
#define DISABLE_DEBUG 0x0800

/* CP0,CP1  code protect off*/
/* other bits zero which means WDT disabled
   Low Voltage prm disabled, brownout disabled
   power up timer enabled */

__CONFIG((CP1 | CP0) | DATA_EEMEM_PROTECT_DISABLE  | XT_OSC | DISABLE_DEBUG);



#define bitset(var,bitno) ((var) |= (1 << (bitno)))
#define bitclr(var,bitno) ((var) &= ~(1 << (bitno)))
#define bittst(var,bitno) (var & (1 << (bitno)))


/* read character from serial port, increment, echo it back */

/* return 8 bit char from Recieve port */
unsigned char getch ()
{
  unsigned char c;

  /* while (!RCIF) */
  while (!bittst(PIR1,5));  /* check RCIF bit */
	 
  c = RCREG;
  return(c);
}

/* send 8 bit char to Recieve port */
void putch (c)
     unsigned char c;

{
  /* wait until transmit reg empty */
  /* while (!TXIF) */
  while (!bittst(PIR1,4));  /* check RCIF bit */
  TXREG = c;
}


main(void)
{
  unsigned char	c;
  
  /* setup Async communication */
  bitclr(TXSTA, 6); /* 8-bit transmit */
  bitset(TXSTA, 5); /* transmit enable*/
  bitclr(TXSTA, 4); /* async mode */
  bitset(TXSTA, 2); /* high speed mode */

  /* set baud rate */
  //  SPBRG = 25;  /* 9600 in high baud rate mode, crystal = 4.00 Mhz */
  SPBRG = 95;  /* 9600 in high baud rate mode, crystal = 14.7456 Mhz */

  bitset(TRISC, 7); /* serial port enable */
  bitset(TRISC, 6); /* serial port enable */
  bitset(RCSTA, 7); /* serial port enable */
  bitclr(RCSTA, 6); /* 8-bit reception */

  bitset(RCSTA, 4); /* enable recieve */

  for(;;) {
    c = getch ();
    c++;  /* increment Char */
    putch (c);  /* send the char */
  }

}



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