func WriteUint64(writer io.Writer, value uint64) (int, error) {
	var b [8]byte
	binary.BigEndian.PutUint64(b[:], value)
	return writer.Write(b[:])
}
WriteUint64 writes an uint64 value into writer.
package serial
import (
	"encoding/binary"
	"io"
)
func ReadUint16(reader io.Reader) (uint16, error) {
	var b [2]byte
	if _, err := io.ReadFull(reader, b[:]); err != nil {
		return 0, err
	}
	return binary.BigEndian.Uint16(b[:]), nil
}
func WriteUint16(writer io.Writer, value uint16) (int, error) {
	var b [2]byte
	binary.BigEndian.PutUint16(b[:], value)
	return writer.Write(b[:])
}