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82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/* m68hc11/sio.h -- Utility methods to read/write the SIO
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Copyright 1999, 2000, 2003 Free Software Foundation, Inc.
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Written by Stephane Carrez (stcarrez@nerim.fr)
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This file is part of GDB, GAS, and the GNU binutils.
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GDB, GAS, and the GNU binutils are free software; you can redistribute
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them and/or modify them under the terms of the GNU General Public
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License as published by the Free Software Foundation; either version
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1, or (at your option) any later version.
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GDB, GAS, and the GNU binutils are distributed in the hope that they
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will be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this file; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef _M68HC12_SIO_H
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#define _M68HC12_SIO_H
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#include <sys/param.h>
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#include <sys/ports.h>
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/* Initialize SCI serial port to default baudrate and enable. */
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extern inline void
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serial_init (void)
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{
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SCIBD = M6811_DEF_BAUD;
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SCICR1 = 0x00; //typical 8 bit
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SCICR2 = 0x0c; //Enable sci for polling
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}
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/* Return != 0 if there is something to read on the serial line. */
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extern inline unsigned char
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serial_receive_pending (void)
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{
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return SCISR1 & RDRF;
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}
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/* Wait until the SIO has finished to send the character. */
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extern inline void
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serial_flush (void)
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{
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while (!(SCISR1 & TDRE))
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cop_optional_reset ();
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}
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/* Return != 0 if serial port is ready to send another char. */
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extern inline unsigned char
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serial_send_ready (void)
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{
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return SCISR1 & TDRE;
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}
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/* Send the character on the serial line. */
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extern inline void
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serial_send (char c)
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{
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serial_flush ();
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SCIDRL = c;
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SCICR2 |= (1<<3);
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}
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/* Wait for a character on the serial line and return it. */
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extern inline unsigned char
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serial_recv (void)
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{
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while (!(SCISR1 & RDRF))
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cop_optional_reset ();
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return SCIDRL;
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}
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extern void serial_print (const char *msg);
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extern void serial_getline (char *buf);
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#endif /* _M68HC11_SIO_H */
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