Add support for extended BAUD settings
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4967 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
parent
c9586a659d
commit
6e28bc9669
@ -3035,4 +3035,9 @@
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* arch/arm/src/lpc43xx/lpc43_serial.c: Add support for certain RS-485 features
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* lib/termios/lib_cfsetispeed.c, lib_cfsetospeed.c, lib_tcflush.c: Add
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simple implementations of cfsetispeed(), cfsetospeed(), and tcflush().
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* include/sys/str_tty.h, lib/lib_setspeed.c, lib_getspeed.c, and lib_resetspeed.c:
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Add APIs to support setting non-standard BAUD values not supported by POSIX
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termios. These are non-standard interfaces but have a precedence: There are
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similar interfaces in AIX.
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@ -49,70 +49,76 @@
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* Pre-Processor Definitions
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********************************************************************************************/
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/* Get and Set Terminal Attributes */
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/* Get and Set Terminal Attributes (see termios.h) */
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#define TCGETS _TIOC(0x0001) /* Get serial port settings: FAR struct termios */
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#define TCSETS _TIOC(0x0002) /* Set serial port settings: FAR const struct termios */
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#define TCSETSW _TIOC(0x0003) /* Drain output and set serial port settings: FAR const struct termios */
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#define TCSETSF _TIOC(0x0004) /* Drain output, discard intput, and set serial port settings: FAR const struct termios */
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#define TCGETA _TIOC(0x0005) /* See TCGETS: FAR struct termio */
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#define TCSETA _TIOC(0x0006) /* See TCSETS: FAR const struct termio */
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#define TCSETAW _TIOC(0x0007) /* See TCSETSF: FAR const struct termio */
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#define TCSETAF _TIOC(0x0008) /* See TCSETSF: FAR const struct termio */
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#define TCGETS _TIOC(0x0001) /* Get serial port settings: FAR struct termios* */
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#define TCSETS _TIOC(0x0002) /* Set serial port settings: FAR const struct termios* */
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#define TCSETSW _TIOC(0x0003) /* Drain output and set serial port settings: FAR const struct termios* */
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#define TCSETSF _TIOC(0x0004) /* Drain output, discard intput, and set serial port settings: FAR const struct termios* */
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#define TCGETA _TIOC(0x0005) /* See TCGETS: FAR struct termio* */
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#define TCSETA _TIOC(0x0006) /* See TCSETS: FAR const struct termio* */
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#define TCSETAW _TIOC(0x0007) /* See TCSETSF: FAR const struct termio* */
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#define TCSETAF _TIOC(0x0008) /* See TCSETSF: FAR const struct termio* */
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/* Locking the termios structure */
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#define TIOCGLCKTRMIOS _TIOC(0x0009) /* Get termios lock status: struct termios */
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#define TIOCSLCKTRMIOS _TIOC(0x000a) /* Set termios lock status: const struct termios */
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#define TIOCGLCKTRMIOS _TIOC(0x0009) /* Get termios lock status: FAR struct termios* */
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#define TIOCSLCKTRMIOS _TIOC(0x000a) /* Set termios lock status: FAR const struct termios* */
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/* Support for AIX-style get_speed, set_speed, and reset_speed operations (see sys/str_tty.h) */
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#define TIOCSETSPEED _TIOC(0x000b) /* Set speed, enter extended speed mode: int32_t */
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#define TIOCGETSPEED _TIOC(0x000c) /* Get speed: int32_t* */
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#define TIOCRESETSPEED _TIOC(0x000d) /* Exit extended speed mode: None */
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/* Get and Set Window Size */
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#define TIOCGWINSZ _TIOC(0x000b) /* Get window size: FAR struct winsize */
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#define TIOCSWINSZ _TIOC(0x000c) /* Set window size: FAR const struct winsize */
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#define TIOCGWINSZ _TIOC(0x000e) /* Get window size: FAR struct winsize */
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#define TIOCSWINSZ _TIOC(0x000f) /* Set window size: FAR const struct winsize */
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/* Send a break */
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#define TCSBRK _TIOC(0x000d) /* Send a break: int */
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#define TCSBRKP _TIOC(0x000e) /* Send a POSIX break: int */
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#define TIOCSBRK _TIOC(0x000f) /* Turn break on: void */
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#define TIOCCBRK _TIOC(0x0010) /* Turn break off: void */
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#define TCSBRK _TIOC(0x0010) /* Send a break: int */
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#define TCSBRKP _TIOC(0x0011) /* Send a POSIX break: int */
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#define TIOCSBRK _TIOC(0x0012) /* Turn break on: void */
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#define TIOCCBRK _TIOC(0x0013) /* Turn break off: void */
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/* Software flow control */
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#define TCXONC _TIOC(0x0011) /* Control flow control: int */
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#define TCXONC _TIOC(0x0014) /* Control flow control: int */
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/* Buffer count and flushing */
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#define TIOCINQ _TIOC(0x0012) /* Bytes in input buffer: int */
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#define TIOCOUTQ _TIOC(0x0013) /* Bytes in output buffer: int */
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#define TCFLSH _TIOC(0x0014) /* Flush: int */
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#define TIOCINQ _TIOC(0x0015) /* Bytes in input buffer: int */
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#define TIOCOUTQ _TIOC(0x0016) /* Bytes in output buffer: int */
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#define TCFLSH _TIOC(0x0017) /* Flush: int */
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/* Faking input */
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#define TIOCSTI _TIOC(0x0015) /* Insert into input: const char */
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#define TIOCSTI _TIOC(0x0018) /* Insert into input: const char */
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/* Re-directing console output */
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#define TIOCCONS _TIOC(0x0016) /* Re-direct console output to device: void */
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#define TIOCCONS _TIOC(0x0019) /* Re-direct console output to device: void */
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/* Controlling TTY */
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#define TIOCSCTTY _TIOC(0x0017) /* Make controlling TTY: int */
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#define TIOCNOTTY _TIOC(0x0018) /* Give up controllinog TTY: void */
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#define TIOCSCTTY _TIOC(0x001a) /* Make controlling TTY: int */
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#define TIOCNOTTY _TIOC(0x001b) /* Give up controllinog TTY: void */
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/* Exclusive mode */
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#define TIOCEXCL _TIOC(0x0019) /* Put TTY in exclusive mode: void */
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#define TIOCNXCL _TIOC(0x001a) /* Disable exclusive mode: void */
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#define TIOCEXCL _TIOC(0x001c) /* Put TTY in exclusive mode: void */
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#define TIOCNXCL _TIOC(0x001d) /* Disable exclusive mode: void */
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/* Line discipline */
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#define TIOCGETD _TIOC(0x001b) /* Get line discipline: FAR int */
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#define TIOCSETD _TIOC(0x001c) /* Set line discipline: FAR const int */
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#define TIOCGETD _TIOC(0x001e) /* Get line discipline: FAR int */
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#define TIOCSETD _TIOC(0x001f) /* Set line discipline: FAR const int */
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/* Packet mode */
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#define TIOCPKT _TIOC(0x001d) /* Control packet mode: FAR const int */
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#define TIOCPKT _TIOC(0x0020) /* Control packet mode: FAR const int */
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# define TIOCPKT_FLUSHREAD (1 << 0) /* The read queue for the terminal is flushed */
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# define TIOCPKT_FLUSHWRITE (1 << 1) /* The write queue for the terminal is flushed */
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@ -123,10 +129,10 @@
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/* Modem control */
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#define TIOCMGET _TIOC(0x001e) /* Get modem status bits: FAR int */
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#define TIOCMSET _TIOC(0x001f) /* Set modem status bits: FAR const int */
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#define TIOCMBIC _TIOC(0x0020) /* Clear modem bits: FAR const int */
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#define TIOCMBIS _TIOC(0x0021) /* Set modem bits: FAR const int */
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#define TIOCMGET _TIOC(0x0021) /* Get modem status bits: FAR int */
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#define TIOCMSET _TIOC(0x0022) /* Set modem status bits: FAR const int */
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#define TIOCMBIC _TIOC(0x0023) /* Clear modem bits: FAR const int */
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#define TIOCMBIS _TIOC(0x0024) /* Set modem bits: FAR const int */
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# define TIOCM_LE (1 << 0) /* DSR (data set ready/line enable) */
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# define TIOCM_DTR (1 << 1) /* DTR (data terminal ready) */
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@ -142,32 +148,32 @@
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/* TTY shutdown */
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#define TIOCVHANGUP _TIOC(0x0022) /* Shutdown TTY: void */
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#define TIOCVHANGUP _TIOC(0x0025) /* Shutdown TTY: void */
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/* Marking a line as local */
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#define TIOCGSOFTCAR _TIOC(0x0023) /* Get software carrier flag: FAR int */
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#define TIOCSSOFTCAR _TIOC(0x0024) /* Set software carrier flag: FAR const int */
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#define TIOCGSOFTCAR _TIOC(0x0026) /* Get software carrier flag: FAR int */
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#define TIOCSSOFTCAR _TIOC(0x0027) /* Set software carrier flag: FAR const int */
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/* Get/set serial line info */
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#define TIOCGSERIAL _TIOC(0x0025) /* Get serial line info: FAR struct serial_struct */
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#define TIOCSSERIAL _TIOC(0x0026) /* Set serial line info: FAR const struct serial_struct */
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#define TIOCSERGETLSR _TIOC(0x0027) /* Get line status register: FAR int */
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#define TIOCGSERIAL _TIOC(0x0028) /* Get serial line info: FAR struct serial_struct */
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#define TIOCSSERIAL _TIOC(0x0029) /* Set serial line info: FAR const struct serial_struct */
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#define TIOCSERGETLSR _TIOC(0x002a) /* Get line status register: FAR int */
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/* Serial events */
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#define TIOCMIWAIT _TIOC(0x0028) /* Wait for a change on serial input line(s): void */
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#define TIOCGICOUNT _TIOC(0x0029) /* Read serial port interrupt count: FAR struct serial_icounter_struct */
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#define TIOCMIWAIT _TIOC(0x002b) /* Wait for a change on serial input line(s): void */
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#define TIOCGICOUNT _TIOC(0x002c) /* Read serial port interrupt count: FAR struct serial_icounter_struct */
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/* RS-485 Support */
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#define TIOCSRS485 _TIOC(0x002a) /* Set RS485 mode, arg: pointer to struct serial_rs485 */
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#define TIOCGRS485 _TIOC(0x002b) /* Get RS485 mode, arg: pointer to struct serial_rs485 */
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#define TIOCSRS485 _TIOC(0x002d) /* Set RS485 mode, arg: pointer to struct serial_rs485 */
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#define TIOCGRS485 _TIOC(0x002e) /* Get RS485 mode, arg: pointer to struct serial_rs485 */
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/* Debugging */
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#define TIOCSERGSTRUCT _TIOC(0x002c) /* Get device TTY structure */
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#define TIOCSERGSTRUCT _TIOC(0x002f) /* Get device TTY structure */
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/* Definitions used in struct serial_rs485 (Linux compatible) */
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100
include/sys/str_tty.h
Normal file
100
include/sys/str_tty.h
Normal file
@ -0,0 +1,100 @@
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/****************************************************************************
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* include/sys/str_tty.h
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_STR_TTY_H
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#define __INCLUDE_SYS_STR_TTY_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Type Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/* These are non-standard AIX-like interfaces to simplify TTY baud rate
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* operations.
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*
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* The baud rate functions set_speed() and get_speed() are provided to
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* allow the applications to program any value of the baud rate that is
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* supported by the serial driver, but that cannot be expressed using
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* the termios subroutines cfsetospeed, cfsetispeed, cfgetospeed,
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* and cfsgetispeed. Those subroutines are limited to the set of values
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* defined termios.h.
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*
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* Normal mode: This is the default mode, in which a termios supported
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* speed is in use.
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*
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* Speed-extended mode: This mode is entered by calling set_speed() with
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* a non-termios supported speed at the configuration of the line. In this
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* mode, all the calls to tcgetattr subroutine or TCGETS ioctl subroutine
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* will have B50 in the returned termios structure.
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*
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* If tcsetattr() or TCSETS, TCSETAF, or TCSETAW ioctl calls the driver
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* and attempts to set B50, the actual baud rate is not changed. If it
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* attempts to set any other termios-supported speed, will switch back
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* to the normal mode and the requested baud rate is set. Calling
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* reset_speed subroutine is another way to switch back to the
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* normal mode.
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*/
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EXTERN int32_t get_speed(int fd);
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EXTERN int set_speed(int fd, int32_t speed);
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EXTERN int reset_speed(int fd);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYS_STR_TTY_H */
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@ -36,7 +36,15 @@
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TERMIOS_SRCS =
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ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
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# POSIX standard interfaces
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TERMIOS_SRCS += lib_cfgetispeed.c lib_cfgetospeed.c lib_cfsetispeed.c
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TERMIOS_SRCS += lib_cfsetospeed.c lib_tcflush.c lib_tcgetattr.c
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TERMIOS_SRCS += lib_tcsetattr.c
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# Non-standard AIX-like interfaces
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TERMIOS_SRCS += lib_getspeed.c lib_resetspeed.c lib_setspeed.c
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endif
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118
lib/termios/lib_getspeed.c
Normal file
118
lib/termios/lib_getspeed.c
Normal file
@ -0,0 +1,118 @@
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/****************************************************************************
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* lib/termios/lib_getspeed.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
|
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* are met:
|
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*
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* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
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* distribution.
|
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* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
|
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/str_tty.h>
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#include <sys/ioctl.h>
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#include <nuttx/serial/tioctl.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: get_speed
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*
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* Descripton:
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* set_speed(), get_speed(), and reset_speed are non-standard AIX-like
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* interfaces to simplify TTY baud rate operations.
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*
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* The baud rate functions set_speed() and get_speed() are provided to
|
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* allow the applications to program any value of the baud rate that is
|
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* supported by the serial driver, but that cannot be expressed using
|
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* the termios subroutines cfsetospeed, cfsetispeed, cfgetospeed,
|
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* and cfsgetispeed. Those subroutines are limited to the set of values
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* defined termios.h.
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*
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* Normal mode: This is the default mode, in which a termios supported
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* speed is in use.
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*
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* Speed-extended mode: This mode is entered by calling set_speed() with
|
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* a non-termios supported speed at the configuration of the line. In this
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* mode, all the calls to tcgetattr subroutine or TCGETS ioctl subroutine
|
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* will have B50 in the returned termios structure.
|
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*
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* If tcsetattr() or TCSETS, TCSETAF, or TCSETAW ioctl calls the driver
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* and attempts to set B50, the actual baud rate is not changed. If it
|
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* attempts to set any other termios-supported speed, will switch back
|
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* to the normal mode and the requested baud rate is set. Calling
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* reset_speed subroutine is another way to switch back to the
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* normal mode.
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*
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* Input Parameters:
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* fd - The 'fd' argument is an open file descriptor associated with a
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* terminal.
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*
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* Returned Value:
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* Upon successful completion, the extended baud is returned. Otherwise,
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* -1 is returned and errno is set to indicate the error.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int32_t get_speed(int fd)
|
||||
{
|
||||
int32_t speed;
|
||||
int ret;
|
||||
|
||||
ret = ioctl(fd, TIOCGETSPEED, (unsigned long)((uintptr_t)&speed));
|
||||
if (ret < 0)
|
||||
{
|
||||
return (int32_t)ret;
|
||||
}
|
||||
|
||||
return speed;
|
||||
}
|
||||
109
lib/termios/lib_resetspeed.c
Normal file
109
lib/termios/lib_resetspeed.c
Normal file
@ -0,0 +1,109 @@
|
||||
/****************************************************************************
|
||||
* lib/termios/lib_resetspeed.c
|
||||
*
|
||||
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <sys/str_tty.h>
|
||||
#include <sys/ioctl.h>
|
||||
|
||||
#include <nuttx/serial/tioctl.h>
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: reset_speed
|
||||
*
|
||||
* Descripton:
|
||||
* set_speed(), get_speed(), and reset_speed are non-standard AIX-like
|
||||
* interfaces to simplify TTY baud rate operations.
|
||||
*
|
||||
* The baud rate functions set_speed() and get_speed() are provided to
|
||||
* allow the applications to program any value of the baud rate that is
|
||||
* supported by the serial driver, but that cannot be expressed using
|
||||
* the termios subroutines cfsetospeed, cfsetispeed, cfgetospeed,
|
||||
* and cfsgetispeed. Those subroutines are limited to the set of values
|
||||
* defined termios.h.
|
||||
*
|
||||
* Normal mode: This is the default mode, in which a termios supported
|
||||
* speed is in use.
|
||||
*
|
||||
* Speed-extended mode: This mode is entered by calling set_speed() with
|
||||
* a non-termios supported speed at the configuration of the line. In this
|
||||
* mode, all the calls to tcgetattr subroutine or TCGETS ioctl subroutine
|
||||
* will have B50 in the returned termios structure.
|
||||
*
|
||||
* If tcsetattr() or TCSETS, TCSETAF, or TCSETAW ioctl calls the driver
|
||||
* and attempts to set B50, the actual baud rate is not changed. If it
|
||||
* attempts to set any other termios-supported speed, will switch back
|
||||
* to the normal mode and the requested baud rate is set. Calling
|
||||
* reset_speed subroutine is another way to switch back to the
|
||||
* normal mode.
|
||||
*
|
||||
* Input Parameters:
|
||||
* fd - The 'fd' argument is an open file descriptor associated with a terminal.
|
||||
* cmd - The TCFLSH ioctl argument.
|
||||
*
|
||||
* Returned Value:
|
||||
* Upon successful completion, 0 is returned. Otherwise, -1 is returned and
|
||||
* errno is set to indicate the error.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int reset_speed(int fd)
|
||||
{
|
||||
return ioctl(fd, TIOCRESETSPEED, 0L);
|
||||
}
|
||||
110
lib/termios/lib_setspeed.c
Normal file
110
lib/termios/lib_setspeed.c
Normal file
@ -0,0 +1,110 @@
|
||||
/****************************************************************************
|
||||
* lib/termios/lib_setspeed.c
|
||||
*
|
||||
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <sys/str_tty.h>
|
||||
#include <sys/ioctl.h>
|
||||
|
||||
#include <nuttx/serial/tioctl.h>
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: set_speed
|
||||
*
|
||||
* Descripton:
|
||||
* set_speed(), get_speed(), and reset_speed are non-standard AIX-like
|
||||
* interfaces to simplify TTY baud rate operations.
|
||||
*
|
||||
* The baud rate functions set_speed() and get_speed() are provided to
|
||||
* allow the applications to program any value of the baud rate that is
|
||||
* supported by the serial driver, but that cannot be expressed using
|
||||
* the termios subroutines cfsetospeed, cfsetispeed, cfgetospeed,
|
||||
* and cfsgetispeed. Those subroutines are limited to the set of values
|
||||
* defined termios.h.
|
||||
*
|
||||
* Normal mode: This is the default mode, in which a termios supported
|
||||
* speed is in use.
|
||||
*
|
||||
* Speed-extended mode: This mode is entered by calling set_speed() with
|
||||
* a non-termios supported speed at the configuration of the line. In this
|
||||
* mode, all the calls to tcgetattr subroutine or TCGETS ioctl subroutine
|
||||
* will have B50 in the returned termios structure.
|
||||
*
|
||||
* If tcsetattr() or TCSETS, TCSETAF, or TCSETAW ioctl calls the driver
|
||||
* and attempts to set B50, the actual baud rate is not changed. If it
|
||||
* attempts to set any other termios-supported speed, will switch back
|
||||
* to the normal mode and the requested baud rate is set. Calling
|
||||
* reset_speed subroutine is another way to switch back to the
|
||||
* normal mode.
|
||||
*
|
||||
* Input Parameters:
|
||||
* fd - The 'fd' argument is an open file descriptor associated with a
|
||||
* terminal.
|
||||
* speed - The new, extended baud
|
||||
*
|
||||
* Returned Value:
|
||||
* Upon successful completion, 0 is returned. Otherwise, -1 is returned and
|
||||
* errno is set to indicate the error.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int set_speed(int fd, int32_t speed)
|
||||
{
|
||||
return ioctl(fd, TIOCSETSPEED, (unsigned long)speed);
|
||||
}
|
||||
@ -84,7 +84,5 @@
|
||||
|
||||
int tcflush(int fd, int cmd)
|
||||
{
|
||||
/* Not yet implemented */
|
||||
|
||||
return ioctl(fd, TCFLSH, (unsigned long)cmd);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user