anchor.diff:                            Timeout == 0 -> ok;
                             true -> try_cancel(Port, Timeout div 2)
                         end
  -              after ?delay ->
  +              after 100*?delay ->
                           ct:fail("No message from driver")
                 end
       end.
  
positive.code:                 true ->
                      try_timeouts(Port, Timeout div 2)
              end
      after Timeout + ?delay ->
                ct:fail("driver failed to timeout")
      end.
  
  
negative.code:                 true ->
                      try_timeouts(Port, Timeout div 2)
              end
      after Timeout + 100*?delay ->
                ct:fail("driver failed to timeout")
      end.
  
  