write to serial port

server.cpp

#include <sys/types.h>
#include <sys/stat.h>
#include <termios.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>

#define BAUDRATE B9600
#define DEVICE "/dev/ttySP2"

main(){
    printf("hello");
    int fd;
    struct termios opt;
    fd = open(DEVICE, O_RDWR | O_NOCTTY | O_NDELAY);
    if ( fd < 0 ){
        perror(DEVICE);
    }
    unsigned char data[200] = "Hellodkslnkfndkslakdjaskldjaskldjasasdasdasd";
    opt.c_cflag = B9600 | CS8 | CLOCAL | CREAD;
    opt.c_iflag = IGNPAR;
    opt.c_lflag = 0;
    opt.c_oflag = 0;
    opt.c_cc[VMIN] = 0;      //Minimum bytes available
    opt.c_cc[VTIME] = 0;
    tcflush(fd, TCIFLUSH);
    tcsetattr (fd, TCSANOW, &opt);

    while(1){
        printf("Sending\n");
        int sended = write(fd, &data, 20);
        tcflush(fd, TCIOFLUSH);
        sleep(1);
    }
}