64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
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* button.c:
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* Simple button test for the Quick2Wire interface board.
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*
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* Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
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***********************************************************************
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* This file is part of wiringPi:
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* https://projects.drogon.net/raspberry-pi/wiringpi/
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*
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* wiringPi is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* wiringPi is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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#include <stdio.h>
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#include <wiringPi.h>
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#define BUTTON 0
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#define LED1 1
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#define LED2 7
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int main (void)
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{
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// Enable the on-goard GPIO
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wiringPiSetup () ;
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printf ("Raspberry Pi - Quick2Wire Mainboard Button & LED Test\n") ;
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pinMode (BUTTON, INPUT) ;
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pinMode (LED1, OUTPUT) ;
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pinMode (LED2, OUTPUT) ;
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digitalWrite (LED1, HIGH) ; // On-board LED on
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digitalWrite (LED2, LOW) ; // 2nd LED off
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for (;;)
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{
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if (digitalRead (BUTTON) == HIGH) // Swap LED states
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{
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digitalWrite (LED1, LOW) ;
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digitalWrite (LED2, HIGH) ;
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while (digitalRead (BUTTON) == HIGH)
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delay (1) ;
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digitalWrite (LED1, HIGH) ;
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digitalWrite (LED2, LOW) ;
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}
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delay (1) ;
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}
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return 0 ;
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}
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