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incubator-nuttx/include/termios.h

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/****************************************************************************
* include/termios.h
*
* Copyright (C) 2011-2012 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.
*
****************************************************************************/
#ifndef __INCLUDE_TERMIOS_H
#define __INCLUDE_TERMIOS_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Terminal input modes (c_iflag in the termios structure) */
#define BRKINT (1 << 0) /* Bit 0: Signal interrupt on break */
#define ICRNL (1 << 1) /* Bit 1: Map CR to NL on input */
#define IGNBRK (1 << 2) /* Bit 2: Ignore break condition */
#define IGNCR (1 << 3) /* Bit 3: Ignore CR */
#define IGNPAR (1 << 4) /* Bit 4: Ignore characters with parity errors */
#define INLCR (1 << 5) /* Bit 5: Map NL to CR on input */
#define INPCK (1 << 6) /* Bit 6: Enable input parity check */
#define ISTRIP (1 << 7) /* Bit 7: Strip character */
#define IUCLC (1 << 8) /* Bit 8: Map upper-case to lower-case on input (LEGACY) */
#define IXANY (1 << 9) /* Bit 9: Enable any character to restart output */
#define IXOFF (1 << 10) /* Bit 10: Enable start/stop input control */
#define IXON (1 << 11) /* Bit 11: Enable start/stop output control */
#define PARMRK (1 << 12) /* Bit 12: Mark parity errors */
/* Terminal output modes (c_oflag in the termios structure) */
#define OPOST (1 << 0) /* Bit 0: Post-process output */
#define OLCUC (1 << 1) /* Bit 1: Map lower-case to upper-case on output (LEGACY) */
#define ONLCR (1 << 2) /* Bit 2: Map NL to CR-NL on output */
#define OCRNL (1 << 3) /* Bit 3: Map CR to NL on output */
#define ONOCR (1 << 4) /* Bit 4: No CR output at column 0 */
#define ONLRET (1 << 5) /* Bit 5: NL performs CR function */
#define OFILL (1 << 6) /* Bit 6: Use fill characters for delay */
#define NLDLY (1 << 7) /* Bit 7: Select newline delays: */
# define NL0 (0 << 7) /* Newline character type 0 */
# define NL1 (1 << 7) /* Newline character type 1 */
#define CRDLY (3 << 8) /* Bits 8-9: Select carriage-return delays: */
# define CR0 (0 << 8) /* Carriage-return delay type 0 */
# define CR1 (1 << 8) /* Carriage-return delay type 1 */
# define CR2 (2 << 8) /* Carriage-return delay type 2 */
# define CR3 (3 << 8) /* Carriage-return delay type 3 */
#define TABDLY (3 << 10) /* Bit 10-11: Select horizontal-tab delays: */
# define TAB0 (0 << 10) /* Horizontal-tab delay type 0 */
# define TAB1 (1 << 10) /* Horizontal-tab delay type 1 */
# define TAB2 (2 << 10) /* Horizontal-tab delay type 2 */
# define TAB3 (3 << 10) /* Expand tabs to spaces */
#define BSDLY (1 << 12) /* Bit 12: Select backspace delays: */
# define BS0 (0 << 12) /* Backspace-delay type 0 */
# define BS1 (1 << 12) /* Backspace-delay type 1 */
#define VTDLY (1 << 13) /* Bit 13: Select vertical-tab delays: */
# define VT0 (0 << 13) /* Vertical-tab delay type 0 */
# define VT1 (1 << 13) /* Vertical-tab delay type 1 */
#define FFDLY (1 << 14) /* Bit 14: Select form-feed delays: */
# define FF0 (0 << 14) /* Form-feed delay type 0 */
# define FF1 (1 << 14) /* Form-feed delay type 1 */
/* Control Modes (c_cflag in the termios structure) */
#define CSIZE (3 << 0) /* Bits 0-1: Character size: */
# define CS5 (0 << 0) /* 5 bits */
# define CS6 (1 << 0) /* 6 bits */
# define CS7 (2 << 0) /* 7 bits */
# define CS8 (3 << 0) /* 8 bits */
#define CSTOPB (1 << 2) /* Bit 2: Send two stop bits, else one */
#define CREAD (1 << 3) /* Bit 3: Enable receiver */
#define PARENB (1 << 4) /* Bit 4: Parity enable */
#define PARODD (1 << 5) /* Bit 5: Odd parity, else even */
#define HUPCL (1 << 6) /* Bit 6: Hang up on last close */
#define CLOCAL (1 << 7) /* Bit 7: Ignore modem status lines */
/* Local Modes (c_lflag in the termios structure) */
#define ECHO (1 << 0) /* Bit 0: Enable echo */
#define ECHOE (1 << 1) /* Bit 1: Echo erase character as error-correcting backspace */
#define ECHOK (1 << 2) /* Bit 2: Echo KILL */
#define ECHONL (1 << 3) /* Bit 3: Echo NL */
#define ICANON (1 << 4) /* Bit 4: Canonical input (erase and kill processing) */
#define IEXTEN (1 << 5) /* Bit 5: Enable extended input character processing */
#define ISIG (1 << 6) /* Bit 6: Enable signals */
#define NOFLSH (1 << 7) /* Bit 7: Disable flush after interrupt or quit */
#define TOSTOP (1 << 8) /* Bit 8: Send SIGTTOU for background output */
#define XCASE (1 << 9) /* Bit 9: Canonical upper/lower presentation (LEGACY) */
/* The following are subscript names for the termios c_cc array */
#define VEOF 0 /* Bit 0: EOF character (canonical mode) */
#define VMIN VEOF /* Bit 0: MIN value (Non-canonical mode) */
#define VEOL 1 /* Bit 1: EOL character (canonical mode) */
#define VTIME VEOL /* Bit 1: TIME value (Non-canonical mode) */
#define VERASE 2 /* Bit 2: ERASE character (canonical mode) */
#define VINTR 3 /* Bit 3: INTR character */
#define VKILL 4 /* Bit 4: KILL character (canonical mode) */
#define VQUIT 5 /* Bit 5: QUIT character */
#define VSTART 6 /* Bit 6: START character */
#define VSTOP 7 /* Bit 7: STOP character */
#define VSUSP 8 /* Bit 8: SUSP character */
#define NCCS 9 /* Bit 9: Size of the array c_cc for control characters */
/* Baud Rate Selection. These are instances of type speed_t. Values of 38400
* and below are specified by POSIX; values above 38400 are sometimes referred
* to as extended values and most values appear in most termios.h implementations.
*
* NOTE that is NuttX that the encoding of the speed_t values is simply the
* value of the baud itself. So this opens a window for non-portable abuse
* of the speed-related interfaces: The defined values should be used where-
* ever possible for reasons of portability.
*/
#define B0 0 /* Hang up */
#define B50 50 /* 50 baud */
#define B75 75 /* 75 baud */
#define B110 110 /* 110 baud */
#define B134 134 /* 134.5 baud */
#define B150 150 /* 150 baud */
#define B200 200 /* 200 baud */
#define B300 300 /* 300 baud */
#define B600 600 /* 600 baud */
#define B1200 1200 /* 1,200 baud */
#define B1800 1800 /* 1,800 baud */
#define B2400 2400 /* 2,400 baud */
#define B4800 4800 /* 4,800 baud */
#define B9600 9600 /* 9,600 baud */
#define B19200 19200 /* 19,200 baud */
#define B38400 38400 /* 38,400 baud */
#define B57600 57600 /* 57,600 baud */
#define B115200 115200 /* 115,200 baud */
#define B128000 128000 /* 128,000 baud */
#define B230400 230400 /* 230,400 baud */
#define B256000 256000 /* 256,000 baud */
#define B460800 460800 /* 460,800 baud */
#define B500000 500000 /* 500,000 baud */
#define B576000 576000 /* 576,000 baud */
#define B921600 921600 /* 921,600 baud */
#define B1000000 1000000 /* 1,000,000 baud */
#define B1152000 1152000 /* 1,152,000 baud */
#define B1500000 1500000 /* 1,500,000 baud */
#define B2000000 2000000 /* 2,000,000 baud */
#define B2500000 2500000 /* 2,500,000 baud */
#define B3000000 3000000 /* 3,000,000 baud */
/* Attribute Selection (used with tcsetattr()) */
#define TCSANOW 0 /* Change attributes immediately */
#define TCSADRAIN 1 /* Change attributes when output has drained */
#define TCSAFLUSH 2 /* Change attributes when output has drained; also flush pending input */
/* Line Control (used with tcflush()) */
#define TCIFLUSH 0 /* Flush pending input. Flush untransmitted output */
#define TCIOFLUSH 1 /* Flush both pending input and untransmitted output */
#define TCOFLUSH 2 /* Flush untransmitted output */
/* Constants for use with tcflow() */
#define TCIOFF 0 /* Transmit a STOP character, intended to suspend input data */
#define TCION 1 /* Transmit a START character, intended to restart input data */
#define TCOOFF 2 /* Suspend output */
#define TCOON 3 /* Restart output */
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* Baud rate selection */
typedef uint32_t speed_t; /* Used for terminal baud rates */
/* Types used within the termios structure */
typedef uint16_t tcflag_t; /* Used for terminal modes */
typedef int cc_t; /* Used for terminal special characters */
/* The termios structure */
struct termios
{
/* Exposed fields defined by POSIX */
tcflag_t c_iflag; /* Input modes */
tcflag_t c_oflag; /* Output modes */
tcflag_t c_cflag; /* Control modes */
tcflag_t c_lflag; /* Local modes */
cc_t c_cc[NCCS]; /* Control chars */
/* Implementation specific fields. For portability reasons, these fields
* should not be accessed directly, but rather through only through the
* cf[set|get][o|i]speed() POSIX interfaces.
*/
speed_t c_speed; /* Input/output speed (non-POSIX)*/
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* The cfgetspeed() function is a non-POSIX function will extract the baud
* from the termios structure to which the termiosp argument points. NuttX
* does not control input/output baud independently. Both must be the same.
* The POSIX standard interfaces, cfigetispeed() and cfigetospeed() are
* supported by simply defining them to be cfgetspeed().
*/
EXTERN speed_t cfgetspeed(FAR const struct termios *termiosp);
#define cfgetispeed(termiosp) cfgetspeed(termiosp)
#define cfgetospeed(termiosp) cfgetspeed(termiosp)
/* The cfsetspeed() function is a non-POSIX function that sets the baud
* stored in the structure pointed to by termiosp to speed. NuttX does
* not control input/output baud independently. Both must be the same.
* The POSIX standard interfaces, cfigetispeed() and cfigetospeed() are
* supported by simply defining them to be cfsetspeed().
*/
EXTERN int cfsetspeed(FAR struct termios *termiosp, speed_t speed);
#define cfsetispeed(termiosp,speed) cfsetspeed(termiosp,speed)
#define cfsetospeed(termiosp,speed) cfsetspeed(termiosp,speed)
/* Wait for transmission of output */
EXTERN int tcdrain(int fd);
/* Suspend or restart the transmission or reception of data */
EXTERN int tcflow(int fd, int action);
/* Flush non-transmitted output data, non-read input data or both */
EXTERN int tcflush(int fd, int cmd);
/* Get the parameters associated with the terminal */
EXTERN int tcgetattr(int fd, FAR struct termios *termiosp);
/* Get process group ID for session leader for controlling terminal */
EXTERN pid_t tcgetsid(int fd);
/* Send a "break" for a specific duration */
EXTERN int tcsendbreak(int fd, int duration);
/* Set the parameters associated with the terminal */
EXTERN int tcsetattr(int fd, int options, FAR const struct termios *termiosp);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __INCLUDE_TERMIOS_H */
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