-- PCA8574 GPIO pin services -- 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 GPIO; PACKAGE PCA8574.GPIO IS TYPE PinNumber IS NEW Natural RANGE 0 .. 7; TYPE PinSubclass IS NEW Standard.GPIO.PinInterface WITH PRIVATE; -- GPIO pin constructor FUNCTION Create (device : NOT NULL PCA8574.Device; number : PinNumber; direction : Standard.GPIO.Direction; state : Boolean := False) RETURN Standard.GPIO.Pin; -- GPIO pin read method FUNCTION Get(Self : IN OUT PinSubclass) RETURN Boolean; -- GPIO pin write method PROCEDURE Put(Self : IN OUT PinSubclass; state: Boolean); PRIVATE TYPE PinSubclass IS NEW Standard.GPIO.PinInterface WITH RECORD device : PCA8574.Device; dir : Standard.GPIO.Direction; mask : PCA8574.Byte; END RECORD; END PCA8574.GPIO;