-- Test a PCA8574 as 8 individual GPIO pins

-- 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
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WITH Ada.Text_IO; USE Ada.Text_IO;

WITH GPIO;
WITH I2C.RemoteIO;
WITH PCA8574;
WITH PCA8574.GPIO;
WITH RemoteIO.Client.hidapi;

PROCEDURE test_pca8574_gpio IS

  bus   : I2C.Bus;
  dev   : PCA8574.Device;
  pins  : ARRAY (PCA8574.GPIO.PinNumber) OF GPIO.Pin;

BEGIN
  New_Line;
  Put_Line("PCA8574 GPIO Toggle Test");
  New_Line;

  -- Create I2C bus object

  bus := I2C.RemoteIO.Create(RemoteIO.Client.hidapi.Create, 0);

  -- Create PCA8574 device object

  dev   := PCA8574.Create(bus, 16#38#);

  -- Configure GPIO pins

  FOR n IN pins'Range LOOP
    pins(n) := PCA8574.GPIO.Create(dev, n, GPIO.Output);
  END LOOP;

  -- Toggle GPIO pins

  Put_Line("Toggling pins...");

  LOOP
    FOR p OF pins LOOP
      p.Put(NOT p.Get);
    END LOOP;
  END LOOP;
END test_pca8574_gpio;