{ PCA8574 I2C GPIO Expander GPIO Pin Toggle Test }

{ Copyright (C)2018-2023, 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: }
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{ * Redistributions of source code must retain the above copyright notice,    }
{   this list of conditions and the following disclaimer.                     }
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{ 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         }
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{ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN     }
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{ POSSIBILITY OF SUCH DAMAGE.                                                 }

PROGRAM test_pca8574_gpio;

USES
  GPIO,
  I2C,
  PCA8574,
  PCA8574_GPIO,
  RemoteIO_Client,
  RemoteIO_Client_hidapi,
  SysUtils;

VAR
  remdev : RemoteIO_Client.Device;
  bus    : I2C.Bus;
  dev    : PCA8574.Device;
  pin    : GPIO.Pin;

BEGIN
  Writeln;
  Writeln('PCA8574 I2C GPIO Expander GPIO Pin Toggle Test');
  Writeln;

  { Create objects }

  remdev := RemoteIO_Client_hidapi.Create;
  bus    := remdev.I2C(0);
  dev    := PCA8574.Device.Create(bus, $38);
  pin    := PCA8574_GPIO.PinSubclass.Create(dev, 0, GPIO.Output);

  { Toggle pin }

  REPEAT
    pin.State := NOT pin.State;
  UNTIL False;
END.