1 /* Remote serial support interface definitions for GDB, the GNU Debugger.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* For most routines, if a failure is indicated, then errno should be
30 /* Terminal state pointer. This is specific to each type of
33 typedef void *serial_ttystate;
36 /* Try to open NAME. Returns a new `struct serial *' on success, NULL
37 on failure. Note that some open calls can block and, if possible,
38 should be written to be non-blocking, with calls to ui_look_hook
39 so they can be cancelled. An async interface for open could be
40 added to GDB if necessary. */
42 extern struct serial *serial_open (const char *name);
44 /* Open a new serial stream using a file handle. */
46 extern struct serial *serial_fdopen (const int fd);
48 /* Push out all buffers, close the device and destroy SCB. */
50 extern void serial_close (struct serial *scb);
52 /* Push out all buffers and destroy SCB without closing the device. */
54 extern void serial_un_fdopen (struct serial *scb);
56 /* Read one char from the serial device with TIMEOUT seconds to wait
57 or -1 to wait forever. Use timeout of 0 to effect a poll.
58 Infinite waits are not permitted. Returns unsigned char if ok, else
59 one of the following codes. Note that all error return-codes are
60 guaranteed to be < 0. */
63 SERIAL_ERROR = -1, /* General error. */
64 SERIAL_TIMEOUT = -2, /* Timeout or data-not-ready during read.
65 Unfortunately, through
66 deprecated_ui_loop_hook (), this can also
67 be a QUIT indication. */
68 SERIAL_EOF = -3 /* General end-of-file or remote target
69 connection closed, indication. Includes
70 things like the line dropping dead. */
73 extern int serial_readchar (struct serial *scb, int timeout);
75 /* Write LEN chars from STRING to the port SCB. Returns 0 for
76 success, non-zero for failure. */
78 extern int serial_write (struct serial *scb, const char *str, int len);
80 /* Write a printf style string onto the serial port. */
82 extern void serial_printf (struct serial *desc,
83 const char *,...) ATTR_FORMAT (printf, 2, 3);
85 /* Allow pending output to drain. */
87 extern int serial_drain_output (struct serial *);
89 /* Flush (discard) pending output. Might also flush input (if this
90 system can't flush only output). */
92 extern int serial_flush_output (struct serial *);
94 /* Flush pending input. Might also flush output (if this system can't
97 extern int serial_flush_input (struct serial *);
99 /* Send a break between 0.25 and 0.5 seconds long. */
101 extern int serial_send_break (struct serial *scb);
103 /* Turn the port into raw mode. */
105 extern void serial_raw (struct serial *scb);
107 /* Return a pointer to a newly malloc'd ttystate containing the state
110 extern serial_ttystate serial_get_tty_state (struct serial *scb);
112 /* Set the state of the tty to TTYSTATE. The change is immediate.
113 When changing to or from raw mode, input might be discarded.
114 Returns 0 for success, negative value for error (in which case
115 errno contains the error). */
117 extern int serial_set_tty_state (struct serial *scb, serial_ttystate ttystate);
119 /* printf_filtered a user-comprehensible description of ttystate on
120 the specified STREAM. FIXME: At present this sends output to the
121 default stream - GDB_STDOUT. */
123 extern void serial_print_tty_state (struct serial *scb, serial_ttystate ttystate, struct ui_file *);
125 /* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the
126 current state (generally obtained from a recent call to
127 serial_get_tty_state()), but be careful not to discard any input.
128 This means that we never switch in or out of raw mode, even if
129 NEW_TTYSTATE specifies a switch. */
131 extern int serial_noflush_set_tty_state (struct serial *scb, serial_ttystate new_ttystate, serial_ttystate old_ttystate);
133 /* Set the baudrate to the decimal value supplied. Returns 0 for
134 success, -1 for failure. */
136 extern int serial_setbaudrate (struct serial *scb, int rate);
138 /* Set the number of stop bits to the value specified. Returns 0 for
139 success, -1 for failure. */
141 #define SERIAL_1_STOPBITS 1
142 #define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
143 #define SERIAL_2_STOPBITS 3
145 extern int serial_setstopbits (struct serial *scb, int num);
147 /* Asynchronous serial interface: */
149 /* Can the serial device support asynchronous mode? */
151 extern int serial_can_async_p (struct serial *scb);
153 /* Has the serial device been put in asynchronous mode? */
155 extern int serial_is_async_p (struct serial *scb);
157 /* For ASYNC enabled devices, register a callback and enable
158 asynchronous mode. To disable asynchronous mode, register a NULL
161 typedef void (serial_event_ftype) (struct serial *scb, void *context);
162 extern void serial_async (struct serial *scb, serial_event_ftype *handler, void *context);
164 /* Provide direct access to the underlying FD (if any) used to
165 implement the serial device. This interface is clearly
166 deprecated. Will call internal_error() if the operation isn't
167 applicable to the current serial device. */
169 extern int deprecated_serial_fd (struct serial *scb);
171 /* Trace/debug mechanism.
173 serial_debug() enables/disables internal debugging.
174 serial_debug_p() indicates the current debug state. */
176 extern void serial_debug (struct serial *scb, int debug_p);
178 extern int serial_debug_p (struct serial *scb);
181 /* Details of an instance of a serial object */
185 int fd; /* File descriptor */
186 struct serial_ops *ops; /* Function vector */
187 void *state; /* Local context info for open FD */
188 serial_ttystate ttystate; /* Not used (yet) */
189 int bufcnt; /* Amount of data remaining in receive
190 buffer. -ve for sticky errors. */
191 unsigned char *bufp; /* Current byte */
192 unsigned char buf[BUFSIZ]; /* Da buffer itself */
193 int current_timeout; /* (ser-unix.c termio{,s} only), last
195 int timeout_remaining; /* (ser-unix.c termio{,s} only), we
196 still need to wait for this many
198 char *name; /* The name of the device or host */
199 struct serial *next; /* Pointer to the next `struct serial *' */
200 int refcnt; /* Number of pointers to this block */
201 int debug_p; /* Trace this serial devices operation. */
202 int async_state; /* Async internal state. */
203 void *async_context; /* Async event thread's context */
204 serial_event_ftype *async_handler;/* Async event handler */
210 struct serial_ops *next;
211 int (*open) (struct serial *, const char *name);
212 void (*close) (struct serial *);
213 int (*readchar) (struct serial *, int timeout);
214 int (*write) (struct serial *, const char *str, int len);
215 /* Discard pending output */
216 int (*flush_output) (struct serial *);
217 /* Discard pending input */
218 int (*flush_input) (struct serial *);
219 int (*send_break) (struct serial *);
220 void (*go_raw) (struct serial *);
221 serial_ttystate (*get_tty_state) (struct serial *);
222 int (*set_tty_state) (struct serial *, serial_ttystate);
223 void (*print_tty_state) (struct serial *, serial_ttystate,
225 int (*noflush_set_tty_state) (struct serial *, serial_ttystate,
227 int (*setbaudrate) (struct serial *, int rate);
228 int (*setstopbits) (struct serial *, int num);
229 /* Wait for output to drain */
230 int (*drain_output) (struct serial *);
231 /* Change the serial device into/out of asynchronous mode, call
232 the specified function when ever there is something
234 void (*async) (struct serial *scb, int async_p);
237 /* Add a new serial interface to the interface list */
239 extern void serial_add_interface (struct serial_ops * optable);
241 /* File in which to record the remote debugging session */
243 extern void serial_log_command (const char *);
245 #endif /* SERIAL_H */