1 /* Remote serial support interface definitions for GDB, the GNU Debugger.
2 Copyright 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* Terminal state pointer. This is specific to each type of interface. */
25 typedef PTR serial_ttystate
;
29 int fd
; /* File descriptor */
30 struct serial_ops
*ops
; /* Function vector */
31 serial_ttystate ttystate
; /* Not used (yet) */
32 int bufcnt
; /* Amount of data in receive buffer */
33 unsigned char *bufp
; /* Current byte */
34 unsigned char buf
[BUFSIZ
]; /* Da buffer itself */
35 int current_timeout
; /* (termio{s} only), last value of VTIME */
36 /* ser-unix.c termio{,s} only, we still need to wait for this many more
38 int timeout_remaining
;
39 char *name
; /* The name of the device or host */
40 struct _serial_t
*next
; /* Pointer to the next serial_t */
41 int refcnt
; /* Number of pointers to this block */
44 typedef struct _serial_t
*serial_t
;
48 struct serial_ops
*next
;
49 int (*open
) PARAMS ((serial_t
, const char *name
));
50 void (*close
) PARAMS ((serial_t
));
51 int (*readchar
) PARAMS ((serial_t
, int timeout
));
52 int (*write
) PARAMS ((serial_t
, const char *str
, int len
));
53 int (*flush_output
) PARAMS ((serial_t
));
54 int (*flush_input
) PARAMS ((serial_t
));
55 int (*send_break
) PARAMS ((serial_t
));
56 void (*go_raw
) PARAMS ((serial_t
));
57 serial_ttystate (*get_tty_state
) PARAMS ((serial_t
));
58 int (*set_tty_state
) PARAMS ((serial_t
, serial_ttystate
));
59 void (*print_tty_state
) PARAMS ((serial_t
, serial_ttystate
));
60 int (*noflush_set_tty_state
)
61 PARAMS ((serial_t
, serial_ttystate
, serial_ttystate
));
62 int (*setbaudrate
) PARAMS ((serial_t
, int rate
));
63 int (*setstopbits
) PARAMS ((serial_t
, int num
));
66 /* Add a new serial interface to the interface list */
68 void serial_add_interface
PARAMS ((struct serial_ops
*optable
));
70 serial_t serial_open
PARAMS ((const char *name
));
72 serial_t serial_fdopen
PARAMS ((const int fd
));
74 /* For most routines, if a failure is indicated, then errno should be
77 /* Try to open NAME. Returns a new serial_t on success, NULL on failure.
80 #define SERIAL_OPEN(NAME) serial_open(NAME)
82 /* Open a new serial stream using a file handle. */
84 #define SERIAL_FDOPEN(FD) serial_fdopen(FD)
86 /* Flush pending output. Might also flush input (if this system can't flush
89 #define SERIAL_FLUSH_OUTPUT(SERIAL_T) \
90 ((SERIAL_T)->ops->flush_output((SERIAL_T)))
92 /* Flush pending input. Might also flush output (if this system can't flush
95 #define SERIAL_FLUSH_INPUT(SERIAL_T)\
96 ((*(SERIAL_T)->ops->flush_input) ((SERIAL_T)))
98 /* Send a break between 0.25 and 0.5 seconds long. */
100 #define SERIAL_SEND_BREAK(SERIAL_T) \
101 ((*(SERIAL_T)->ops->send_break) (SERIAL_T))
103 /* Turn the port into raw mode. */
105 #define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))
107 /* Return a pointer to a newly malloc'd ttystate containing the state
109 #define SERIAL_GET_TTY_STATE(SERIAL_T) (SERIAL_T)->ops->get_tty_state((SERIAL_T))
111 /* Set the state of the tty to TTYSTATE. The change is immediate.
112 When changing to or from raw mode, input might be discarded.
113 Returns 0 for success, negative value for error (in which case errno
114 contains the error). */
115 #define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) (SERIAL_T)->ops->set_tty_state((SERIAL_T), (TTYSTATE))
117 /* printf_filtered a user-comprehensible description of ttystate. */
118 #define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE) \
119 ((*((SERIAL_T)->ops->print_tty_state)) ((SERIAL_T), (TTYSTATE)))
121 /* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the
122 current state (generally obtained from a recent call to
123 SERIAL_GET_TTY_STATE), but be careful not to discard any input.
124 This means that we never switch in or out of raw mode, even
125 if NEW_TTYSTATE specifies a switch. */
126 #define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \
127 ((*((SERIAL_T)->ops->noflush_set_tty_state)) \
128 ((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE)))
130 /* Read one char from the serial device with TIMEOUT seconds to wait
131 or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
132 char if ok, else one of the following codes. Note that all error
133 codes are guaranteed to be < 0. */
135 #define SERIAL_ERROR -1 /* General error, see errno for details */
136 #define SERIAL_TIMEOUT -2
137 #define SERIAL_EOF -3
139 #define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT))
141 /* Set the baudrate to the decimal value supplied. Returns 0 for success,
144 #define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))
146 /* Set the number of stop bits to the value specified. Returns 0 for success,
149 #define SERIAL_1_STOPBITS 1
150 #define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
151 #define SERIAL_2_STOPBITS 3
153 #define SERIAL_SETSTOPBITS(SERIAL_T, NUM) ((SERIAL_T)->ops->setstopbits((SERIAL_T), NUM))
155 /* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for
156 success, non-zero for failure. */
158 #define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))
160 /* Push out all buffers, close the device and destroy SERIAL_T. */
162 void serial_close
PARAMS ((serial_t
, int));
164 #define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T, 1)
166 /* Push out all buffers and destroy SERIAL_T without closing the device. */
168 #define SERIAL_UN_FDOPEN(SERIAL_T) serial_close(SERIAL_T, 0)
170 #endif /* SERIAL_H */
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