Updated: April 19, 2023 |
Set the output baud rate in a termios structure
#include <termios.h> int cfsetospeed( struct termios *termios_p, speed_t speed );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The cfsetospeed() function sets the output baud rate within the termios structure pointed to by termios_p to be speed.
You can get a valid termios control structure for an opened device by calling tcgetattr().
Setting the output baud rate to B0 causes the connection to be dropped. If termios_p represents a modem, the modem control lines are turned off.
#include <termios.h> #include <fcntl.h> #include <unistd.h> #include <stdlib.h> int main( void ) { int fd; struct termios termios_p; speed_t speed; fd = open( "/dev/ser1", O_RDWR ); tcgetattr( fd, &termios_p); /* * Set output baud rate */ speed = B9600; cfsetospeed( &termios_p, speed ); tcsetattr( fd, TCSADRAIN, &termios_p); close( fd ); return EXIT_SUCCESS; }
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |