source_add(sdi->serial->fd, G_IO_IN, -1, receive_data, sdi);
packet.type = DF_HEADER;
source_add(sdi->serial->fd, G_IO_IN, -1, receive_data, sdi);
packet.type = DF_HEADER;
packet.payload = (unsigned char *) &header;
header.feed_version = 1;
gettimeofday(&header.starttime, NULL);
packet.payload = (unsigned char *) &header;
header.feed_version = 1;
gettimeofday(&header.starttime, NULL);