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Merge pull request #886 from dbuchwald/ser_posix_cleanup 

Cleanup of POSIX serial init code
This commit is contained in:
Jörg Wunsch 2022-02-20 20:58:22 +01:00 committed by GitHub
parent 0d7d034d24 cf67a76c23
commit bb73ade70b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 71 additions and 27 deletions
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98
src/ser_posix.c
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@ -98,19 +98,6 @@ static speed_t serial_baud_lookup(long baud)
return baud;
}
static tcflag_t translate_flags(unsigned long cflags)
{
return ((cflags & SERIAL_CS5) ? CS5 : 0) |
((cflags & SERIAL_CS6) ? CS6 : 0) |
((cflags & SERIAL_CS7) ? CS7 : 0) |
((cflags & SERIAL_CS8) ? CS8 : 0) |
((cflags & SERIAL_CSTOPB) ? CSTOPB : 0) |
((cflags & SERIAL_CREAD) ? CREAD : 0) |
((cflags & (SERIAL_PARENB | SERIAL_PARODD)) ? PARENB : 0) |
((cflags & SERIAL_PARODD) ? PARODD : 0) |
((cflags & SERIAL_CLOCAL) ? CLOCAL : 0) ;
}
static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cflags)
{
int rc;
@ -137,16 +124,79 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
original_termios = termios;
}
termios.c_iflag = IGNBRK;
termios.c_oflag = 0;
termios.c_lflag = 0;
termios.c_cflag = translate_flags(cflags);
termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0;
if (cflags & SERIAL_CREAD) {
termios.c_cflag |= CREAD;
}
if (cflags & SERIAL_CLOCAL) {
termios.c_cflag |= CLOCAL;
}
termios.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ISIG | IEXTEN);
#ifdef ECHOCTL
termios.c_lflag &= ~ECHOCTL;
#endif /* ECHOCTL */
#ifdef ECHOKE
termios.c_lflag &= ~ECHOKE;
#endif /* ECHOKE */
termios.c_oflag &= ~(OPOST | ONLCR | OCRNL);
termios.c_iflag &= ~(INLCR | IGNCR | ICRNL | IGNBRK);
#ifdef IUCLC
termios.c_iflag &= ~IUCLC;
#endif /* IUCLC */
#ifdef PARMRK
termios.c_iflag &= ~PARMRK;
#endif /* PARMRK */
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
termios.c_cflag &= ~CSIZE;
if (cflags & SERIAL_CS8) {
termios.c_cflag |= CS8;
}
if (cflags & SERIAL_CS7) {
termios.c_cflag |= CS7;
}
if (cflags & SERIAL_CS6) {
termios.c_cflag |= CS6;
}
if (cflags & SERIAL_CS5) {
termios.c_cflag |= CS5;
}
if (cflags & SERIAL_CSTOPB) {
termios.c_cflag |= CSTOPB;
} else {
termios.c_cflag &= ~CSTOPB;
}
termios.c_iflag &= ~(INPCK | ISTRIP);
if (cflags & (SERIAL_PARENB | SERIAL_PARODD)) {
termios.c_cflag |= PARENB;
} else {
termios.c_cflag &= ~PARENB;
}
if (cflags & SERIAL_PARODD) {
termios.c_cflag |= PARODD;
} else {
termios.c_cflag &= ~PARODD;
}
#ifdef IXANY
termios.c_iflag &= ~IXANY;
#endif /* IXANY */
termios.c_iflag &= ~(IXON | IXOFF);
#ifdef CRTSCTS
termios.c_iflag &= ~CRTSCTS;
#endif /* CRTSCTS */
#ifdef CNEW_RTSCTS
termios.c_iflag &= ~CNEW_RTSCTS;
#endif /* CRTSCTS */
rc = tcsetattr(fd->ifd, TCSANOW, &termios);
if (rc < 0) {
avrdude_message(MSG_INFO, "%s: ser_setparams(): tcsetattr() failed\n",
@ -154,14 +204,8 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
return -errno;
}
/*
* Everything is now set up for a local line without modem control
* or flow control, so clear O_NONBLOCK again.
*/
rc = fcntl(fd->ifd, F_GETFL, 0);
if (rc != -1)
fcntl(fd->ifd, F_SETFL, rc & ~O_NONBLOCK);
tcflush(fd->ifd, TCIFLUSH);
return 0;
}