how could i change my UART baud

something like this:

int uart_set_baudrate(int filedescriptor,int baudrate) {

struct termios term;

int res;

assert(filedescriptor);

res=ioctl(filedescriptor,TIOCMGET,&term);

if(res<0) {

DPRINTF("ERROR ioctl filedescriptor:%d\r\n",filedescriptor);

return res;

}

term.c_ispeed=baudrate;

term.c_ospeed=baudrate;

res=ioctl(filedescriptor,TIOCMSET,&term);

if(res<0) {

DPRINTF("ERROR ioctl filedescriptor:%d\r\n",filedescriptor);

}

return res;

}

to get filedescriptor use:

int fd;

fd=open("/dev/uart_0",O_RDWR | O_NONBLOCK | O_NOCTTY);