code: def connect(self, chip_name, speed='auto', verbose=False):
          
  
          if verbose:
              self.exec_command('EnableRemarks = 1')
  
          # This is weird but is currently the only way to specify what the
          # target is to the J-Link.
          self.exec_command('Device = %s' % chip_name)
  
          # Need to select target interface speed here, so the J-Link knows what
          # speed to use to establish target communication.
          if speed == 'auto':
              self.set_speed(auto=True)
          elif speed == 'adaptive':
              self.set_speed(adaptive=True)
          else:
              self.set_speed(speed)
  
          result = self._dll.JLINKARM_Connect()
          if result < 0:
              raise errors.JLinkException(result)
  
          try:
              # Issue a no-op command after connect. This has to be in a try-catch.
              self.halted()
          except errors.JLinkException:
              pass
  
          # Determine which device we are.  This is essential for using methods
          # like 'unlock' or 'lock'.
          for index in range(self.num_supported_devices()):
              device = self.supported_device(index)
              if device.name.lower() == chip_name.lower():
                  self._device = device
                  break
          else:
              raise errors.JLinkException('Unsupported device was connected to.')
  
          return None
docs: Connects the J-Link to its target.
  
          Args:
            self (JLink): the ``JLink`` instance
            chip_name (str): target chip name
            speed (int): connection speed, one of ``{5-12000, 'auto', 'adaptive'}``
            verbose (bool): boolean indicating if connection should be verbose in logging
  
          Returns:
            ``None``
  
          Raises:
            JLinkException: if connection fails to establish.
            TypeError: if given speed is invalid