-- Test an PCA8574 I2C GPIO expander as an 8-bit parallel port -- 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 Ada.Text_IO; USE Ada.Text_IO; WITH I2C.RemoteIO; WITH PCA8574; WITH RemoteIO.Client.hidapi; PROCEDURE test_pca8574_byte IS bus : I2C.Bus; dev : PCA8574.Device; BEGIN New_Line; Put_Line("PCA8574 Byte I/O 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#); -- Write increasing values to the PCA8574 Put_Line("Press CONTROL-C to exit."); New_Line; LOOP FOR b IN PCA8574.Byte'Range LOOP dev.Put(b); END LOOP; END LOOP; END test_pca8574_byte;