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/* Remote serial support interface definitions for GDB, the GNU Debugger.
Copyright 1992, 1993 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it 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 program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef SERIAL_H
#define SERIAL_H
/* Terminal state pointer. This is specific to each type of interface. */
typedef PTR serial_ttystate;
struct _serial_t
{
int fd; /* File descriptor */
struct serial_ops *ops; /* Function vector */
serial_ttystate ttystate; /* Not used (yet) */
int bufcnt; /* Amount of data in receive buffer */
unsigned char *bufp; /* Current byte */
unsigned char buf[BUFSIZ]; /* Da buffer itself */
int current_timeout; /* (termio{s} only), last value of VTIME */
/* ser-unix.c termio{,s} only, we still need to wait for this many more
seconds. */
int timeout_remaining;
char *name; /* The name of the device or host */
struct _serial_t *next; /* Pointer to the next serial_t */
int refcnt; /* Number of pointers to this block */
};
typedef struct _serial_t *serial_t;
struct serial_ops {
char *name;
struct serial_ops *next;
int (*open) PARAMS ((serial_t, const char *name));
void (*close) PARAMS ((serial_t));
int (*readchar) PARAMS ((serial_t, int timeout));
int (*write) PARAMS ((serial_t, const char *str, int len));
int (*flush_output) PARAMS ((serial_t));
int (*flush_input) PARAMS ((serial_t));
int (*send_break) PARAMS ((serial_t));
void (*go_raw) PARAMS ((serial_t));
serial_ttystate (*get_tty_state) PARAMS ((serial_t));
int (*set_tty_state) PARAMS ((serial_t, serial_ttystate));
void (*print_tty_state) PARAMS ((serial_t, serial_ttystate));
int (*noflush_set_tty_state)
PARAMS ((serial_t, serial_ttystate, serial_ttystate));
int (*setbaudrate) PARAMS ((serial_t, int rate));
int (*setstopbits) PARAMS ((serial_t, int num));
};
/* Add a new serial interface to the interface list */
void serial_add_interface PARAMS ((struct serial_ops *optable));
serial_t serial_open PARAMS ((const char *name));
serial_t serial_fdopen PARAMS ((const int fd));
/* For most routines, if a failure is indicated, then errno should be
examined. */
/* Try to open NAME. Returns a new serial_t on success, NULL on failure.
*/
#define SERIAL_OPEN(NAME) serial_open(NAME)
/* Open a new serial stream using a file handle. */
#define SERIAL_FDOPEN(FD) serial_fdopen(FD)
/* Flush pending output. Might also flush input (if this system can't flush
only output). */
#define SERIAL_FLUSH_OUTPUT(SERIAL_T) \
((SERIAL_T)->ops->flush_output((SERIAL_T)))
/* Flush pending input. Might also flush output (if this system can't flush
only input). */
#define SERIAL_FLUSH_INPUT(SERIAL_T)\
((*(SERIAL_T)->ops->flush_input) ((SERIAL_T)))
/* Send a break between 0.25 and 0.5 seconds long. */
#define SERIAL_SEND_BREAK(SERIAL_T) \
((*(SERIAL_T)->ops->send_break) (SERIAL_T))
/* Turn the port into raw mode. */
#define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))
/* Return a pointer to a newly malloc'd ttystate containing the state
of the tty. */
#define SERIAL_GET_TTY_STATE(SERIAL_T) (SERIAL_T)->ops->get_tty_state((SERIAL_T))
/* Set the state of the tty to TTYSTATE. The change is immediate.
When changing to or from raw mode, input might be discarded.
Returns 0 for success, negative value for error (in which case errno
contains the error). */
#define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) (SERIAL_T)->ops->set_tty_state((SERIAL_T), (TTYSTATE))
/* printf_filtered a user-comprehensible description of ttystate. */
#define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE) \
((*((SERIAL_T)->ops->print_tty_state)) ((SERIAL_T), (TTYSTATE)))
/* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the
current state (generally obtained from a recent call to
SERIAL_GET_TTY_STATE), but be careful not to discard any input.
This means that we never switch in or out of raw mode, even
if NEW_TTYSTATE specifies a switch. */
#define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \
((*((SERIAL_T)->ops->noflush_set_tty_state)) \
((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE)))
/* Read one char from the serial device with TIMEOUT seconds to wait
or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
char if ok, else one of the following codes. Note that all error
codes are guaranteed to be < 0. */
#define SERIAL_ERROR -1 /* General error, see errno for details */
#define SERIAL_TIMEOUT -2
#define SERIAL_EOF -3
#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT))
/* Set the baudrate to the decimal value supplied. Returns 0 for success,
-1 for failure. */
#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))
/* Set the number of stop bits to the value specified. Returns 0 for success,
-1 for failure. */
#define SERIAL_1_STOPBITS 1
#define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
#define SERIAL_2_STOPBITS 3
#define SERIAL_SETSTOPBITS(SERIAL_T, NUM) ((SERIAL_T)->ops->setstopbits((SERIAL_T), NUM))
/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for
success, non-zero for failure. */
#define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))
/* Push out all buffers, close the device and destroy SERIAL_T. */
void serial_close PARAMS ((serial_t, int));
#define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T, 1)
/* Push out all buffers and destroy SERIAL_T without closing the device. */
#define SERIAL_UN_FDOPEN(SERIAL_T) serial_close(SERIAL_T, 0)
#endif /* SERIAL_H */
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