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/* m68hc11/sio.h -- Utility methods to read/write the SIO

   Copyright 1999, 2000, 2003 Free Software Foundation, Inc.

   Written by Stephane Carrez (stcarrez@nerim.fr)

This file is part of GDB, GAS, and the GNU binutils.

GDB, GAS, and the GNU binutils are free software; you can redistribute

them and/or modify them under the terms of the GNU General Public

License as published by the Free Software Foundation; either version

1, or (at your option) any later version.

GDB, GAS, and the GNU binutils are distributed in the hope that they

will be useful, but WITHOUT ANY WARRANTY; without even the implied

warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See

the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this file; see the file COPYING.  If not, write to the Free

Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef _M68HC12_SIO_H

#define _M68HC12_SIO_H

#include <sys/param.h>

#include <sys/ports.h>

/*  Initialize SCI serial port to default baudrate and enable. */

extern inline void

serial_init (void)

{

  SCIBD = M6811_DEF_BAUD;

  SCICR1 = 0x00;            //typical 8 bit

  SCICR2 = 0x0c;            //Enable sci for polling

}

/* Return != 0 if there is something to read on the serial line.  */

extern inline unsigned char

serial_receive_pending (void)

{

  return SCISR1 & RDRF;

}

/* Wait until the SIO has finished to send the character.  */

extern inline void

serial_flush (void)

{

  while (!(SCISR1 & TDRE))

    cop_optional_reset ();

}

/* Return != 0 if serial port is ready to send another char.  */

extern inline unsigned char

serial_send_ready (void)

{

  return SCISR1 & TDRE;

}

/* Send the character on the serial line.  */

extern inline void

serial_send (char c)

{

  serial_flush ();

  SCIDRL = c;

  SCICR2 |= (1<<3);

}

/* Wait for a character on the serial line and return it.  */

extern inline unsigned char

serial_recv (void)

{

  while (!(SCISR1 & RDRF))

    cop_optional_reset ();

  return SCIDRL;

}

extern void serial_print (const char *msg);

extern void serial_getline (char *buf);

#endif /* _M68HC11_SIO_H */