153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/*
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* File : termios.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/08/30 Bernard The first version
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <rtthread.h>
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#include <dfs_posix.h>
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#include <termios.h>
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int tcgetattr(int fd, struct termios *tio)
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{
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/* Get the current serial port settings. */
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if (ioctl(fd, TCGETA, tio))
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return -1;
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return 0;
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}
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int tcsetattr(int fd, int act, const struct termios *tio)
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{
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switch (act)
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{
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case TCSANOW:
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/* make the change immediately */
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return (ioctl(fd, TCSETA, (void*)tio));
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case TCSADRAIN:
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/*
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* Don't make the change until all currently written data
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* has been transmitted.
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*/
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return (ioctl(fd, TCSETAW, (void*)tio));
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case TCSAFLUSH:
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/* Don't make the change until all currently written data
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* has been transmitted, at which point any received but
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* unread data is also discarded.
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*/
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return (ioctl(fd, TCSETAF, (void*)tio));
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default:
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errno = EINVAL;
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return (-1);
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}
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}
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/**
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* this function gets process group ID for session leader for controlling
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* terminal
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*
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* @return always 0
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*/
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pid_t tcgetsid(int fd)
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{
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return 0;
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}
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speed_t cfgetospeed(const struct termios *tio)
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{
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return tio->c_cflag & CBAUD;
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}
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speed_t cfgetispeed(const struct termios *tio)
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{
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return cfgetospeed(tio);
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}
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int cfsetospeed(struct termios *tio, speed_t speed)
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{
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if (speed & ~CBAUD)
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{
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errno = EINVAL;
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return -1;
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}
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tio->c_cflag &= ~CBAUD;
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tio->c_cflag |= speed;
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return 0;
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}
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int cfsetispeed(struct termios *tio, speed_t speed)
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{
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return speed ? cfsetospeed(tio, speed) : 0;
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}
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int tcsendbreak(int fd, int dur)
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{
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/* nonzero duration is implementation-defined, so ignore it */
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return 0;
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}
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int tcflush(int fd, int queue)
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{
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return ioctl(fd, TCFLSH, (void*)queue);
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}
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int tcflow(int fd, int action)
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{
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return ioctl(fd, TCXONC, (void*)action);
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}
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/**
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* this function waits for transmission of output
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*/
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int tcdrain(int fd)
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{
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return 0;
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}
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int isatty (int fd)
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{
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struct termios term;
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return tcgetattr (fd, &term) == 0;
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}
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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void cfmakeraw(struct termios *t)
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{
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t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
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t->c_oflag &= ~OPOST;
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t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
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t->c_cflag &= ~(CSIZE|PARENB);
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t->c_cflag |= CS8;
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t->c_cc[VMIN] = 1;
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t->c_cc[VTIME] = 0;
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}
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int cfsetspeed(struct termios *tio, speed_t speed)
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{
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return cfsetospeed(tio, speed);
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}
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#endif
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