/* * blink-io.c: * Simple "blink" test for the Quick2Wire 16-pin IO board. * * Copyright (c) 2012-2013 Gordon Henderson. *********************************************************************** * This file is part of wiringPi: * https://projects.drogon.net/raspberry-pi/wiringpi/ * * wiringPi is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * wiringPi is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with wiringPi. If not, see . *********************************************************************** */ #include #include #include #define LED 1 #define Q2W_BASE 100 int main (void) { // Enable the on-goard GPIO wiringPiSetup () ; // Add in the mcp23017 on the q2w board mcp23017Setup (Q2W_BASE, 0x20) ; printf ("Raspberry Pi - Quick2Wire MCP23017 Blink Test\n") ; // Blink the on-board LED as well as one on the mcp23017 pinMode (LED, OUTPUT) ; pinMode (Q2W_BASE + 0, OUTPUT) ; for (;;) { digitalWrite (LED, HIGH) ; digitalWrite (Q2W_BASE + 0, HIGH) ; delay (500) ; digitalWrite (LED, LOW) ; digitalWrite (Q2W_BASE + 0, LOW) ; delay (500) ; } return 0 ; }