-- Abstract motor control interface definitions -- Copyright (C)2017-2023, Philip Munts dba Munts Technologies. -- -- Redistribution and use in source and binary forms, with or without -- modification, are permitted provided that the following conditions are met: -- -- * Redistributions of source code must retain the above copyright notice, -- this list of conditions and the following disclaimer. -- -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE -- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -- POSSIBILITY OF SUCH DAMAGE. WITH Ada.Text_IO; WITH IO_Interfaces; PACKAGE Motor IS Motor_Error : EXCEPTION; -- Define a normalized velocity type. Full speed ahead is 1.0, and -- full speed astern is -1.0. TYPE Velocity IS NEW Float RANGE -1.0 .. +1.0; -- Instantiate text I/O package PACKAGE Velocity_IO IS NEW Ada.Text_IO.Float_IO(Velocity); -- Instantiate abstract interfaces package PACKAGE Interfaces IS NEW IO_Interfaces(Velocity); -- Define an abstract interface for motor outputs, derived from -- Interfaces.OutputInterface TYPE OutputInterface IS INTERFACE AND Interfaces.OutputInterface; -- Define an access type compatible with any subclass implementing -- OutputInterface TYPE Output IS ACCESS ALL OutputInterface'Class; END Motor;