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rüdiger Moderator
21:34:00 06.06.2002 Titel: |
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libserial - eine fertige Bibliothek für die Serielleschnittstelle
Serial Programming HOWTO
IO Port Programming HOWTO
Serial HOWTO
Serial Programming Guide for POSIX Compliant Operating Systems
Beispiel: (25.7.2002)
Ein Code von <Martin> aus seinem Buch "C und Linux"
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85 | /*
terminal.c - Ein- und Ausgabe ueber die serielle
Schnittstelle
*/
# include <stdio.h>
# include <unistd.h>
# include <fcntl.h>
# include <termios.h>
# define TERM_DEVICE "/dev/ttyS0" /* = COM1 */
# define TERM_SPEED B19200 /* Bit/Sek */
int main()
{
int fd, old_flags;
ssize_t length;
char buffer[16];
struct termios term_attr;
fd_set input_fdset;
if ((fd = open(TERM_DEVICE, O_RDWR)) == -1)
{
perror("terminal: Can't open device " TERM_DEVICE);
return(1);
}
/* RS232 konfigurieren */
if (tcgetattr(fd, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
term_attr.c_cflag = TERM_SPEED | CS8 | CRTSCTS | CLOCAL;
term_attr.c_iflag = 0;
term_attr.c_oflag = OPOST | ONLCR;
term_attr.c_lflag = 0;
if (tcsetattr(fd, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
/* Std.-Eingabe anpassen */
if (tcgetattr(STDIN_FILENO, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
/* alte Einst. sichern */
old_flags = term_attr.c_lflag;
term_attr.c_lflag &= ~(ICANON | ECHO);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
while (1)
{
FD_ZERO(&input_fdset);
FD_SET(STDIN_FILENO, &input_fdset);
FD_SET(fd, &input_fdset);
if (select(fd+1, &input_fdset, NULL, NULL, NULL) == -1)
perror("terminal: select() failed");
if (FD_ISSET(STDIN_FILENO, &input_fdset))
{
if ((length = read(STDIN_FILENO, buffer, 16)) == -1)
perror("terminal: read() failed");
else
if (buffer[0] == '\33') /* Abbruch mit ESC */
break;
else
write(fd, buffer, length);
}
if (FD_ISSET(fd, &input_fdset))
{
if ((length = read(fd, buffer, 16)) == -1)
perror("terminal: read() failed");
else
write(STDOUT_FILENO, buffer, length);
}
}
/* Std.-Eingabe wie vorher */
term_attr.c_lflag = old_flags;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
printf("Aborted.\n");
close(fd);
return(0);
} | |
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85 | /*
terminal.c - Ein- und Ausgabe ueber die serielle
Schnittstelle
*/
# include <stdio.h>
# include <unistd.h>
# include <fcntl.h>
# include <termios.h>
# define TERM_DEVICE "/dev/ttyS0" /* = COM1 */
# define TERM_SPEED B19200 /* Bit/Sek */
int main()
{
int fd, old_flags;
ssize_t length;
char buffer[16];
struct termios term_attr;
fd_set input_fdset;
if ((fd = open(TERM_DEVICE, O_RDWR)) == -1)
{
perror("terminal: Can't open device " TERM_DEVICE);
return(1);
}
/* RS232 konfigurieren */
if (tcgetattr(fd, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
term_attr.c_cflag = TERM_SPEED | CS8 | CRTSCTS | CLOCAL;
term_attr.c_iflag = 0;
term_attr.c_oflag = OPOST | ONLCR;
term_attr.c_lflag = 0;
if (tcsetattr(fd, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
/* Std.-Eingabe anpassen */
if (tcgetattr(STDIN_FILENO, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
/* alte Einst. sichern */
old_flags = term_attr.c_lflag;
term_attr.c_lflag &= ~(ICANON | ECHO);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
while (1)
{
FD_ZERO(&input_fdset);
FD_SET(STDIN_FILENO, &input_fdset);
FD_SET(fd, &input_fdset);
if (select(fd+1, &input_fdset, NULL, NULL, NULL) == -1)
perror("terminal: select() failed");
if (FD_ISSET(STDIN_FILENO, &input_fdset))
{
if ((length = read(STDIN_FILENO, buffer, 16)) == -1)
perror("terminal: read() failed");
else
if (buffer[0] == '\33') /* Abbruch mit ESC */
break;
else
write(fd, buffer, length);
}
if (FD_ISSET(fd, &input_fdset))
{
if ((length = read(fd, buffer, 16)) == -1)
perror("terminal: read() failed");
else
write(STDOUT_FILENO, buffer, length);
}
}
/* Std.-Eingabe wie vorher */
term_attr.c_lflag = old_flags;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
printf("Aborted.\n");
close(fd);
return(0);
} | |
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85 | /*
terminal.c - Ein- und Ausgabe ueber die serielle
Schnittstelle
*/
# include <stdio.h>
# include <unistd.h>
# include <fcntl.h>
# include <termios.h>
# define TERM_DEVICE "/dev/ttyS0" /* = COM1 */
# define TERM_SPEED B19200 /* Bit/Sek */
int main()
{
int fd, old_flags;
ssize_t length;
char buffer[16];
struct termios term_attr;
fd_set input_fdset;
if ((fd = open(TERM_DEVICE, O_RDWR)) == -1)
{
perror("terminal: Can't open device " TERM_DEVICE);
return(1);
}
/* RS232 konfigurieren */
if (tcgetattr(fd, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
term_attr.c_cflag = TERM_SPEED | CS8 | CRTSCTS | CLOCAL;
term_attr.c_iflag = 0;
term_attr.c_oflag = OPOST | ONLCR;
term_attr.c_lflag = 0;
if (tcsetattr(fd, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
/* Std.-Eingabe anpassen */
if (tcgetattr(STDIN_FILENO, &term_attr) != 0)
{
perror("terminal: tcgetattr() failed");
return(1);
}
/* alte Einst. sichern */
old_flags = term_attr.c_lflag;
term_attr.c_lflag &= ~(ICANON | ECHO);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
while (1)
{
FD_ZERO(&input_fdset);
FD_SET(STDIN_FILENO, &input_fdset);
FD_SET(fd, &input_fdset);
if (select(fd+1, &input_fdset, NULL, NULL, NULL) == -1)
perror("terminal: select() failed");
if (FD_ISSET(STDIN_FILENO, &input_fdset))
{
if ((length = read(STDIN_FILENO, buffer, 16)) == -1)
perror("terminal: read() failed");
else
if (buffer[0] == '\33') /* Abbruch mit ESC */
break;
else
write(fd, buffer, length);
}
if (FD_ISSET(fd, &input_fdset))
{
if ((length = read(fd, buffer, 16)) == -1)
perror("terminal: read() failed");
else
write(STDOUT_FILENO, buffer, length);
}
}
/* Std.-Eingabe wie vorher */
term_attr.c_lflag = old_flags;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_attr) != 0)
perror("terminal: tcsetattr() failed");
printf("Aborted.\n");
close(fd);
return(0);
} | |
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_________________
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Zuletzt bearbeitet von rüdiger am 17:30:18 16.03.2009, insgesamt 3-mal bearbeitet |
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