187 lines
4.2 KiB
C
187 lines
4.2 KiB
C
/* Remote serial interface for Macraigor Systems implementation of
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On-Chip Debugging using serial target box or serial wiggler
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Copyright 1994, 1997, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "serial.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#ifdef _WIN32
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/* On Windows, this function pointer is initialized to a function in
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the wiggler DLL. */
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static int (*dll_do_command) (const char *, char *);
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#endif
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static int
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ocd_open (serial_t scb, const char *name)
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{
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#ifdef _WIN32
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/* Find the wiggler DLL which talks to the board. */
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if (dll_do_command == NULL)
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{
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HINSTANCE handle;
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/* FIXME: Should the user be able to configure this? */
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handle = LoadLibrary ("Wigglers.dll");
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if (handle == NULL)
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error ("Can't load Wigglers.dll");
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dll_do_command = ((int (*) (const char *, char *))
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GetProcAddress (handle, "do_command"));
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if (dll_do_command == NULL)
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error ("Can't find do_command function in Wigglers.dll");
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}
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#else
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/* No wiggler DLLs on Unix yet, fail. */
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error ("Wiggler library not available for this type of host.");
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#endif /* _WIN32 */
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return 0;
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}
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static int
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ocd_noop (serial_t scb)
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{
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return 0;
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}
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static void
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ocd_raw (serial_t scb)
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{
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/* Always in raw mode */
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}
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/* We need a buffer to store responses from the Wigglers.dll */
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#define WIGGLER_BUFF_SIZE 512
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unsigned char from_wiggler_buffer[WIGGLER_BUFF_SIZE];
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unsigned char *wiggler_buffer_ptr; /* curr spot in buffer */
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static int
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ocd_readchar (serial_t scb, int timeout)
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{
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/* Catch attempts at reading past the end of the buffer */
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if (wiggler_buffer_ptr >
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(from_wiggler_buffer + (sizeof (char *) * WIGGLER_BUFF_SIZE)))
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error ("ocd_readchar asked to read past the end of the buffer!");
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return (int) *wiggler_buffer_ptr++; /* return curr char and increment ptr */
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}
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struct ocd_ttystate
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{
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int dummy;
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};
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/* ocd_{get set}_tty_state() are both dummys to fill out the function
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vector. Someday, they may do something real... */
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static serial_ttystate
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ocd_get_tty_state (serial_t scb)
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{
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struct ocd_ttystate *state;
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state = (struct ocd_ttystate *) xmalloc (sizeof *state);
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return (serial_ttystate) state;
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}
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static int
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ocd_set_tty_state (serial_t scb, serial_ttystate ttystate)
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{
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return 0;
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}
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static int
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ocd_noflush_set_tty_state (serial_t scb, serial_ttystate new_ttystate,
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serial_ttystate old_ttystate)
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{
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return 0;
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}
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static void
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ocd_print_tty_state (serial_t scb,
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serial_ttystate ttystate,
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struct ui_file *stream)
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{
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/* Nothing to print. */
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return;
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}
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static int
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ocd_setbaudrate (serial_t scb, int rate)
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{
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return 0;
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}
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static int
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ocd_setstopbits (serial_t scb, int rate)
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{
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return 0;
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}
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static int
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ocd_write (serial_t scb, const char *str, int len)
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{
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#ifdef _WIN32
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/* send packet to Wigglers.dll and store response so we can give it to
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remote-wiggler.c when get_packet is run */
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dll_do_command (str, from_wiggler_buffer);
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wiggler_buffer_ptr = from_wiggler_buffer;
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#endif
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return 0;
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}
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static void
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ocd_close (serial_t scb)
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{
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}
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static struct serial_ops ocd_ops =
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{
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"ocd",
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0,
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ocd_open,
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ocd_close,
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ocd_readchar,
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ocd_write,
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ocd_noop, /* flush output */
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ocd_noop, /* flush input */
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ocd_noop, /* send break -- currently used only for nindy */
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ocd_raw,
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ocd_get_tty_state,
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ocd_set_tty_state,
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ocd_print_tty_state,
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ocd_noflush_set_tty_state,
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ocd_setbaudrate,
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ocd_setstopbits,
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ocd_noop, /* wait for output to drain */
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};
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void
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_initialize_ser_ocd_bdm (void)
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{
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serial_add_interface (&ocd_ops);
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}
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