-- GPIO pin services using the Remote I/O Protocol

-- 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 RemoteIO.Client;

PACKAGE GPIO.RemoteIO IS

  TYPE PinSubclass IS NEW PinInterface WITH PRIVATE;

  -- GPIO pin object constructor

  FUNCTION Create
   (dev      : NOT NULL Standard.RemoteIO.Client.Device;
    num      : Standard.RemoteIO.ChannelNumber;
    dir      : Direction;
    state    : Boolean := False;
    readback : Boolean := True) RETURN Pin;

  -- Read GPIO pin state

  FUNCTION Get(Self : IN OUT PinSubclass) RETURN Boolean;

  -- Write GPIO pin state

  PROCEDURE Put(Self : IN OUT PinSubclass; state : Boolean);

PRIVATE

  TYPE PinSubclass IS NEW PinInterface WITH RECORD
    dev      : Standard.RemoteIO.Client.Device;
    num      : Standard.RemoteIO.ChannelNumber;
    readback : Boolean;
    latch    : Boolean;
  END RECORD;

END GPIO.RemoteIO;