/*
 * BRLTTY - A background process providing access to the console screen (when in
 *          text mode) for a blind person using a refreshable braille display.
 *
 * Copyright (C) 1995-2021 by The BRLTTY Developers.
 *
 * BRLTTY comes with ABSOLUTELY NO WARRANTY.
 *
 * This is free software, placed under the terms of the
 * GNU Lesser General Public License, as published by the Free Software
 * Foundation; either version 2.1 of the License, or (at your option) any
 * later version. Please see the file LICENSE-LGPL for details.
 *
 * Web Page: http://brltty.app/
 *
 * This software is maintained by Dave Mielke <dave@mielke.cc>.
 */

/* used by speech.c */
#include "io_serial.h"
extern SerialDevice *CB_serialDevice;
extern int CB_charactersPerSecond;			/* file descriptor for Braille display */

#define BAUDRATE 38400		/* baud rate for Braille display */

/* The following sequences are sent at termination and before and after Braille
 * data.  The first byte is the length of the sequence.
 *
 * Initialisation is treated specially, as there may not be a Braille
 * display connected.  This relies on a reply from the display.
 */
#define ACK_TIMEOUT 5000	/* acknowledgement timeout in milliseconds */
#define MAX_ATTEMPTS 0		/* total tiimeout = timeout * attempts */