code: def quartus_tcl_add_interface(self, buff, thisIntf, packager):
          
          if packager.getInterfaceDirection(thisIntf) == INTF_DIRECTION.MASTER:
              dir_ = "start"
          else:
              dir_ = "end"
  
          name = packager.getInterfaceLogicalName(thisIntf)
          buff.extend(["add_interface %s %s %s" % 
                       (name, self.get_quartus_name(), dir_)])
  
          self.quartus_prop(buff, name, "ENABLED", True)
          self.quartus_prop(buff, name, "EXPORT_OF", "")
          self.quartus_prop(buff, name, "PORT_NAME_MAP", "")
          self.quartus_prop(buff, name, "CMSIS_SVD_VARIABLES", "")
          self.quartus_prop(buff, name, "SVD_ADDRESS_GROUP", "")
docs: Create interface in Quartus TCL
  
          :return: add_interface command string