-- Button and LED Test using libsimpleio -- Copyright (C)2018-2025, 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 errno; WITH GPIO.libsimpleio; WITH libLinux; PROCEDURE test_button_led_interrupt IS Button : GPIO.Pin; LED : GPIO.Pin; fd : Integer; error : Integer; BEGIN New_Line; Put_Line("Button and LED Test using libsimpleio"); New_Line; -- Configure button and LED GPIO's Button := GPIO.libsimpleio.Create((0, 6), GPIO.Input, edge => GPIO.libsimpleio.Both); LED := GPIO.libsimpleio.Create((0, 26), GPIO.Output); fd := GPIO.libsimpleio.PinSubclass(Button.ALL).fd; LOOP libLinux.PollInput(fd, 1000, error); IF error = errno.EAGAIN THEN Put_Line("Tick..."); ELSIF error /= 0 THEN Put_Line("ERROR: Poll() failed, " & errno.strerror(error)); ELSIF Button.Get THEN Put_Line("PRESSED"); LED.Put(True); ELSE Put_Line("RELEASED"); LED.Put(False); END IF; END LOOP; END test_button_led_interrupt;