| /* 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 */ | |