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. */
25 /* For most routines, if a failure is indicated, then errno should be
28 /* Terminal state pointer. This is specific to each type of
31 typedef void *serial_ttystate;
34 /* Try to open NAME. Returns a new `struct serial *' on success, NULL
35 on failure. Note that some open calls can block and, if possible,
36 should be written to be non-blocking, with calls to ui_look_hook
37 so they can be cancelled. An async interface for open could be
38 added to GDB if necessary. */
40 extern struct serial *serial_open (const char *name);
42 /* Open a new serial stream using a file handle. */
44 extern struct serial *serial_fdopen (const int fd);
46 /* Push out all buffers, close the device and destroy SCB. */
48 extern void serial_close (struct serial *scb);
50 /* Push out all buffers and destroy SCB without closing the device. */
52 extern void serial_un_fdopen (struct serial *scb);
54 /* Read one char from the serial device with TIMEOUT seconds to wait
55 or -1 to wait forever. Use timeout of 0 to effect a poll.
56 Infinite waits are not permitted. Returns unsigned char if ok, else
57 one of the following codes. Note that all error return-codes are
58 guaranteed to be < 0. */
61 SERIAL_ERROR = -1, /* General error. */
62 SERIAL_TIMEOUT = -2, /* Timeout or data-not-ready during read.
63 Unfortunately, through ui_loop_hook(), this
64 can also be a QUIT indication. */
65 SERIAL_EOF = -3 /* General end-of-file or remote target
66 connection closed, indication. Includes
67 things like the line dropping dead. */
70 extern int serial_readchar (struct serial *scb, int timeout);
72 /* Write LEN chars from STRING to the port SCB. Returns 0 for
73 success, non-zero for failure. */
75 extern int serial_write (struct serial *scb, const char *str, int len);
77 /* Write a printf style string onto the serial port. */
79 extern void serial_printf (struct serial *desc, const char *,...) ATTR_FORMAT (printf, 2, 3);
81 /* Allow pending output to drain. */
83 extern int serial_drain_output (struct serial *);
85 /* Flush (discard) pending output. Might also flush input (if this
86 system can't flush only output). */
88 extern int serial_flush_output (struct serial *);
90 /* Flush pending input. Might also flush output (if this system can't
93 extern int serial_flush_input (struct serial *);
95 /* Send a break between 0.25 and 0.5 seconds long. */
97 extern int serial_send_break (struct serial *scb);
99 /* Turn the port into raw mode. */
101 extern void serial_raw (struct serial *scb);
103 /* Return a pointer to a newly malloc'd ttystate containing the state
106 extern serial_ttystate serial_get_tty_state (struct serial *scb);
108 /* Set the state of the tty to TTYSTATE. The change is immediate.
109 When changing to or from raw mode, input might be discarded.
110 Returns 0 for success, negative value for error (in which case
111 errno contains the error). */
113 extern int serial_set_tty_state (struct serial *scb, serial_ttystate ttystate);
115 /* printf_filtered a user-comprehensible description of ttystate on
116 the specified STREAM. FIXME: At present this sends output to the
117 default stream - GDB_STDOUT. */
119 extern void serial_print_tty_state (struct serial *scb, serial_ttystate ttystate, struct ui_file *);
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 if
125 NEW_TTYSTATE specifies a switch. */
127 extern int serial_noflush_set_tty_state (struct serial *scb, serial_ttystate new_ttystate, serial_ttystate old_ttystate);
129 /* Set the baudrate to the decimal value supplied. Returns 0 for
130 success, -1 for failure. */
132 extern int serial_setbaudrate (struct serial *scb, int rate);
134 /* Set the number of stop bits to the value specified. Returns 0 for
135 success, -1 for failure. */
137 #define SERIAL_1_STOPBITS 1
138 #define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
139 #define SERIAL_2_STOPBITS 3
141 extern int serial_setstopbits (struct serial *scb, int num);
143 /* Asynchronous serial interface: */
145 /* Can the serial device support asynchronous mode? */
147 extern int serial_can_async_p (struct serial *scb);
149 /* Has the serial device been put in asynchronous mode? */
151 extern int serial_is_async_p (struct serial *scb);
153 /* For ASYNC enabled devices, register a callback and enable
154 asynchronous mode. To disable asynchronous mode, register a NULL
157 typedef void (serial_event_ftype) (struct serial *scb, void *context);
158 extern void serial_async (struct serial *scb, serial_event_ftype *handler, void *context);
160 /* Provide direct access to the underlying FD (if any) used to
161 implement the serial device. This interface is clearly
162 deprecated. Will call internal_error() if the operation isn't
163 applicable to the current serial device. */
165 extern int deprecated_serial_fd (struct serial *scb);
167 /* Trace/debug mechanism.
169 serial_debug() enables/disables internal debugging.
170 serial_debug_p() indicates the current debug state. */
172 extern void serial_debug (struct serial *scb, int debug_p);
174 extern int serial_debug_p (struct serial *scb);
177 /* Details of an instance of a serial object */
181 int fd; /* File descriptor */
182 struct serial_ops *ops; /* Function vector */
183 void *state; /* Local context info for open FD */
184 serial_ttystate ttystate; /* Not used (yet) */
185 int bufcnt; /* Amount of data remaining in receive
186 buffer. -ve for sticky errors. */
187 unsigned char *bufp; /* Current byte */
188 unsigned char buf[BUFSIZ]; /* Da buffer itself */
189 int current_timeout; /* (ser-unix.c termio{,s} only), last
191 int timeout_remaining; /* (ser-unix.c termio{,s} only), we
192 still need to wait for this many
194 char *name; /* The name of the device or host */
195 struct serial *next; /* Pointer to the next `struct serial *' */
196 int refcnt; /* Number of pointers to this block */
197 int debug_p; /* Trace this serial devices operation. */
198 int async_state; /* Async internal state. */
199 void *async_context; /* Async event thread's context */
200 serial_event_ftype *async_handler;/* Async event handler */
206 struct serial_ops *next;
207 int (*open) (struct serial *, const char *name);
208 void (*close) (struct serial *);
209 int (*readchar) (struct serial *, int timeout);
210 int (*write) (struct serial *, const char *str, int len);
211 /* Discard pending output */
212 int (*flush_output) (struct serial *);
213 /* Discard pending input */
214 int (*flush_input) (struct serial *);
215 int (*send_break) (struct serial *);
216 void (*go_raw) (struct serial *);
217 serial_ttystate (*get_tty_state) (struct serial *);
218 int (*set_tty_state) (struct serial *, serial_ttystate);
219 void (*print_tty_state) (struct serial *, serial_ttystate,
221 int (*noflush_set_tty_state) (struct serial *, serial_ttystate,
223 int (*setbaudrate) (struct serial *, int rate);
224 int (*setstopbits) (struct serial *, int num);
225 /* Wait for output to drain */
226 int (*drain_output) (struct serial *);
227 /* Change the serial device into/out of asynchronous mode, call
228 the specified function when ever there is something
230 void (*async) (struct serial *scb, int async_p);
233 /* Add a new serial interface to the interface list */
235 extern void serial_add_interface (struct serial_ops * optable);
237 /* File in which to record the remote debugging session */
239 extern void serial_log_command (const char *);
241 #endif /* SERIAL_H */