How to configure tty port in C?

[Nekativ]

I am trying to make a program that sends "1" through /dev/ttyUSB0 port and then 10 seconds later sends "q" through /dev/ttyUSB0.

The program works, however it only runs if I have a putty terminal open with the correct baud rate.

I am assuming that putty somehow opens and sets the baud rate for the port correctly. I am also assuming that I somehow need to make my program do the same, the problem is I have no idea how to do this.

Here is what I have so far:

#include <stdio.h>

#include <string.h>

#include <fcntl.h>

#include <errno.h>

#include <termios.h>

#include <unistd.h>

int fd1;

int fd2;

char tempchar = '1';
const void* buf = &tempchar;

char tempcharq = 'q';
const void* bufq = &tempcharq;



char *buff,*buffer,*bufptr;

int wr,rd,nbytes,tries;

int main()


{
	fd1=open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);

	if (fd1 == -1 )
	{
		perror("open_port: Unable to open /dev/ttyUSB1 – ");
	}

	else
	{
		fcntl(fd1, F_SETFL,0);
		printf("Port has been sucessfully opened and %d is the file description\n",fd1);
	}


	wr=write(fd1, buf, 1);

    	sleep(10);

	wr=write(fd1, bufq, 1);

	//wr=write(fd1, "ATZ\r",4);

	//rd=read(fd1,buff,1);

	//printf("bytes sent are %d \n", rd);

	close(fd1);


	return 0;
}

[RobinVossen]

As far as I know USB doesn't have a Baud-Rate as that. (I aint sure)
but I asked the same thing here: OpenRCE