int main()
{
bytes_ct=0;
counter=0;
total=0;
good=0;
bad=0;
counterPrev=0;
syncError=0;


int res = (fd_spi = open("/dev/spislave", O_RDWR ));  // | O_SYNC -- убрал , проверить что не похерилась работа
if (res==-1)
    {
    printf ("error opening device. load driver first\n");
    return 0;
    }

printf ("OK opened /dev/spislave\n");
printf ("processing the received data...\n");
int rawOutput=0;
char writeEnabled =0;
char *ptr;
while (1)
        {

        const struct timespec req= {
            .tv_sec=0,
            .tv_nsec=1} ;
        struct timespec rem;
        nanosleep (&req,&rem);


        int ret_in = read (fd_spi, &buffer, BUFSIZE);

        if (ret_in>0)
            {
            if (writeEnabled)
                write(fd_file, &buffer, ret_in);

            } //^^ ret_in >0


        }

    close (fd_spi);

  return 0;

}