// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// This header file is based on the termios header of
// "The Single UNIX (r) Specification, Version 2, Copyright (c) 1997 The Open Group".
#ifndef __ESP_SYS_TERMIOS_H__
#define __ESP_SYS_TERMIOS_H__
// ESP-IDF NOTE: This header provides only a compatibility layer for macros and functions defined in sys/termios.h.
// Not everything has a defined meaning for ESP-IDF (e.g. process leader IDs) and therefore are likely to be stubbed
// in actual implementations.
#include <stdint.h>
#include <sys/types.h>
#include "sdkconfig.h"
#ifdef CONFIG_SUPPORT_TERMIOS
// subscripts for the array c_cc:
#define VEOF 0 /** EOF character */
#define VEOL 1 /** EOL character */
#define VERASE 2 /** ERASE character */
#define VINTR 3 /** INTR character */
#define VKILL 4 /** KILL character */
#define VMIN 5 /** MIN value */
#define VQUIT 6 /** QUIT character */
#define VSTART 7 /** START character */
#define VSTOP 8 /** STOP character */
#define VSUSP 9 /** SUSP character */
#define VTIME 10 /** TIME value */
#define NCCS (VTIME + 1) /** Size of the array c_cc for control characters */
// input modes for use as flags in the c_iflag field
#define BRKINT (1u << 0) /** Signal interrupt on break. */
#define ICRNL (1u << 1) /** Map CR to NL on input. */
#define IGNBRK (1u << 2) /** Ignore break condition. */
#define IGNCR (1u << 3) /** Ignore CR. */
#define IGNPAR (1u << 4) /** Ignore characters with parity errors. */
#define INLCR (1u << 5) /** Map NL to CR on input. */
#define INPCK (1u << 6) /** Enable input parity check. */
#define ISTRIP (1u << 7) /** Strip character. */
#define IUCLC (1u << 8) /** Map upper-case to lower-case on input (LEGACY). */
#define IXANY (1u << 9) /** Enable any character to restart output. */
#define IXOFF (1u << 10) /** Enable start/stop input control. */
#define IXON (1u << 11) /** Enable start/stop output control. */
#define PARMRK (1u << 12) /** Mark parity errors. */
// output Modes for use as flags in the c_oflag field
#define OPOST (1u << 0) /** Post-process output */
#define OLCUC (1u << 1) /** Map lower-case to upper-case on output (LEGACY). */
#define ONLCR (1u << 2) /** Map NL to CR-NL on output. */
#define OCRNL (1u << 3) /** Map CR to NL on output. */
#define ONOCR (1u << 4) /** No CR output at column 0. */
#define ONLRET (1u << 5) /** NL performs CR function. */
#define OFILL (1u << 6) /** Use fill characters for delay. */
#define NLDLY (1u << 7) /** Select newline delays: */
#define NL0 (0u << 7) /** Newline character type 0. */
#define NL1 (1u << 7) /** Newline character type 1. */
#define CRDLY (3u << 8) /** Select carriage-return delays: */
#define CR0 (0u << 8) /** Carriage-return delay type 0. */
#define CR1 (1u << 8) /** Carriage-return delay type 1. */
#define CR2 (2u << 8) /** Carriage-return delay type 2. */
#define CR3 (3u << 8) /** Carriage-return delay type 3. */
#define TABDLY (3u << 10) /** Select horizontal-tab delays: */
#define TAB0 (0u << 10) /** Horizontal-tab delay type 0. */
#define TAB1 (1u << 10) /** Horizontal-tab delay type 1. */
#define TAB2 (2u << 10) /** Horizontal-tab delay type 2. */
#define TAB3 (3u << 10) /** Expand tabs to spaces. */
#define BSDLY (1u << 12) /** Select backspace delays: */
#define BS0 (0u << 12) /** Backspace-delay type 0. */
#define BS1 (1u << 12) /** Backspace-delay type 1. */
#define VTDLY (1u << 13) /** Select vertical-tab delays: */
#define VT0 (0u << 13) /** Vertical-tab delay type 0. */
#define VT1 (1u << 13) /** Vertical-tab delay type 1. */
#define FFDLY (1u << 14) /** Select form-feed delays: */
#define FF0 (0u << 14) /** Form-feed delay type 0. */
#define FF1 (1u << 14) /** Form-feed delay type 1. */
// Baud Rate Selection. Valid values for objects of type speed_t:
// CBAUD range B0 - B38400
#define B0 0 /** Hang up */
#define B50 1
#define B75 2
#define B110 3
#define B134 4
#define B150 5
#define B200 6
#define B300 7
#define B600 8
#define B1200 9
#define B1800 10
#define B2400 11
#define B4800 12
#define B9600 13
#define B19200 14
#define B38400 15
// CBAUDEX range B57600 - B4000000
#define B57600 16
#define B115200 17
#define B230400 18
#define B460800 19
#define B500000 20
#define B576000 21
#define B921600 22
#define B1000000 23
#define B1152000 24
#define B1500000 25
#define B2000000 26
#define B2500000 27
#define B3000000 28
#define B3500000 29
#define B4000000 30
// Control Modes for the c_cflag field:
#define CSIZE (3u << 0) /* Character size: */
#define CS5 (0u << 0) /** 5 bits. */
#define CS6 (1u << 0) /** 6 bits. */
#define CS7 (2u << 0) /** 7 bits. */
#define CS8 (3u << 0) /** 8 bits. */
#define CSTOPB (1u << 2) /** Send two stop bits, else one. */
#define CREAD (1u << 3) /** Enable receiver. */
#define PARENB (1u << 4) /** Parity enable. */
#define PARODD (1u << 5) /** Odd parity, else even. */
#define HUPCL (1u << 6) /** Hang up on last close. */
#define CLOCAL (1u << 7) /** Ignore modem status lines. */
#define CBAUD (1u << 8) /** Use baud rates defined by B0-B38400 macros. */
#define CBAUDEX (1u << 9) /** Use baud rates defined by B57600-B4000000 macros. */
#define BOTHER (1u << 10) /** Use custom baud rates */
// Local Modes for c_lflag field:
#define ECHO (1u << 0) /** Enable echo. */
#define ECHOE (1u << 1) /** Echo erase character as error-correcting backspace. */
#define ECHOK (1u << 2) /** Echo KILL. */
#define ECHONL (1u << 3) /** Echo NL. */
#define ICANON (1u << 4) /** Canonical input (erase and kill processing). */
#define IEXTEN (1u << 5) /** Enable extended input character processing. */
#define ISIG (1u << 6) /** Enable signals. */
#define NOFLSH (1u << 7) /** Disable flush after interrupt or quit. */
#define TOSTOP (1u << 8) /** Send SIGTTOU for background output. */
#define XCASE (1u << 9) /** Canonical upper/lower presentation (LEGACY). */
// Attribute Selection constants for use 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 constants for use 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. */
typedef uint8_t cc_t;
typedef uint32_t speed_t;
typedef uint16_t tcflag_t;
struct termios
{
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 characters */
speed_t c_ispeed; /** input baud rate */
speed_t c_ospeed; /** output baud rate */
};
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Extracts the input baud rate from the input structure exactly (without interpretation).
*
* @param p input termios structure
* @return input baud rate
*/
speed_t cfgetispeed(const struct termios *p);
/**
* @brief Extracts the output baud rate from the input structure exactly (without interpretation).
*
* @param p input termios structure
* @return output baud rate
*/
speed_t cfgetospeed(const struct termios *p);
/**
* @brief Set input baud rate in the termios structure
*
* There is no effect in hardware until a subsequent call of tcsetattr().
*
* @param p input termios structure
* @param sp input baud rate
* @return 0 when successful, -1 otherwise with errno set
*/
int cfsetispeed(struct termios *p, speed_t sp);
/**
* @brief Set output baud rate in the termios structure
*
* There is no effect in hardware until a subsequent call of tcsetattr().
*
* @param p input termios structure
* @param sp output baud rate
* @return 0 when successful, -1 otherwise with errno set
*/
int cfsetospeed(struct termios *p, speed_t sp);
/**
* @brief Wait for transmission of output
*
* @param fd file descriptor of the terminal
* @return 0 when successful, -1 otherwise with errno set
*/
int tcdrain(int fd);
/**
* @brief Suspend or restart the transmission or reception of data
*
* @param fd file descriptor of the terminal
* @param action selects actions to do
* @return 0 when successful, -1 otherwise with errno set
*/
int tcflow(int fd, int action);
/**
* @brief Flush non-transmitted output data and non-read input data
*
* @param fd file descriptor of the terminal
* @param select selects what should be flushed
* @return 0 when successful, -1 otherwise with errno set
*/
int tcflush(int fd, int select);
/**
* @brief Gets the parameters of the terminal
*
* @param fd file descriptor of the terminal
* @param p output termios structure
* @return 0 when successful, -1 otherwise with errno set
*/
int tcgetattr(int fd, struct termios *p);
/**
* @brief Get process group ID for session leader for controlling terminal
*
* @param fd file descriptor of the terminal
* @return process group ID when successful, -1 otherwise with errno set
*/
pid_t tcgetsid(int fd);
/**
* @brief Send a break for a specific duration
*
* @param fd file descriptor of the terminal
* @param duration duration of break
* @return 0 when successful, -1 otherwise with errno set
*/
int tcsendbreak(int fd, int duration);
/**
* @brief Sets the parameters of the terminal
*
* @param fd file descriptor of the terminal
* @param optional_actions optional actions
* @param p input termios structure
* @return 0 when successful, -1 otherwise with errno set
*/
int tcsetattr(int fd, int optional_actions, const struct termios *p);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // CONFIG_SUPPORT_TERMIOS
#endif //__ESP_SYS_TERMIOS_H__