#include <stdio.h>
#include <string.h>
#include <termio.h>
#include <sys/fcntl.h>
#include <sys/file.h>

int main (int argc, char *argv[])
{
        struct termios oldtio, newtio;
        int fd;
        int file;
        int rdsz;
        char byte[1];
        long baudrate;
        FILE *f;
        
        baudrate = B57600;
        
        if ((fd = open( "/dev/ttyUSB0", O_RDWR| O_NOCTTY)) <0) {
                perror("Could not open ttyS1 device");
                return (-1);
        }
        if (tcgetattr(fd, &oldtio) < 0) {
                perror("Could not get term attributes");
                return (-1);
        }
        /* 8 bits, baud rate and local control */
        bzero(&newtio, sizeof(newtio));
        newtio.c_cflag = CS8 | CLOCAL|baudrate|CREAD;
        newtio.c_lflag = 0;
        newtio.c_oflag = 0;
        newtio.c_iflag = IGNPAR;
        
        newtio.c_cc[VMIN] = 2;
        newtio.c_cc[VTIME] = 10;
        cfsetospeed( &newtio, baudrate);
        cfsetispeed( &newtio, baudrate);

        tcflush( fd, TCIFLUSH);
        if (tcsetattr(fd, TCSANOW, &newtio) < 0) {
                perror("Could not set term attributes");
                return (-1);
        }
        if( NULL == ( f = fopen( argv[1], "rb"))) {
                perror("Could not open file");
                return (-1);
        } else {     /* Soubor se podarilo otevrit */
                printf("Upload started\n");
                while (! feof(f)) {
                        byte[0]=fgetc( f);
                        write( fd, byte, 1);                        
                }
                fclose( f);
        }
        if (tcsetattr(fd, TCSANOW, &oldtio) < 0) {
                perror("Could not set previous term attributes");
                return (-1);
        }
        close( fd);        
}