-- Raspberry Pi LPC1114 I/O Processor Expansion Board
-- LEGOŽ Power Functions Remote Control services

-- Copyright (C)2013-2018, Philip Munts, President, Munts AM Corp.
--
-- 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 spi_agent.pins; USE spi_agent.pins;
WITH spi_agent.gpio; USE spi_agent.gpio;

PACKAGE spi_agent.legorc IS

  TYPE legorc_channel_t IS NEW Natural RANGE 1 .. 4;

  TYPE legorc_motor_t IS
   (ALLSTOP,
    MOTORA,
    MOTORB,
    COMBODIRECT,
    COMBOPWM);

  TYPE legorc_direction_t IS
   (DIRECTION_REVERSE,
    DIRECTION_FORWARD);

  TYPE legorc_speed_t IS NEW Natural RANGE 0 .. 255;

  TYPE LEGORC is TAGGED PRIVATE;

  -- Initialize a LEGOŽ RC output pin

  FUNCTION Create(pin : pin_id_t) RETURN LEGORC;

  -- Write LEGOŽ RC pin

  PROCEDURE Put
   (self      : LEGORC;
    channel   : legorc_channel_t;
    motor     : legorc_motor_t;
    direction : legorc_direction_t;
    speed     : legorc_speed_t);

PRIVATE
  TYPE LEGORC IS TAGGED RECORD
    pin : pin_id_t;
  END RECORD;
END spi_agent.legorc;