a83d64ea6c
This is a general tidyup to detach this fork better from Gordon, who was (and perhaps still is) completely inundated with WiringPi-related support questions. This changeset includes a number of tweaks which should reduce support burden on Gordon. I believe they are essential if we plan to release a new debian package. They should - hopefully - not reduce or make ambiguous the origins of this code while achieving the above. * Remove Gordon's email address from all source files to avoid support queries finding their way to him * Update wiringPi URLs to the GitHub repository to try and keep bugs/issues within the fork * Bump version to 2.70 ready for a debian package release * Update debian package maintainer info, add bugs & homepage URLs to this repository
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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* binary.c:
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* Using the Quick 2 wire 16-bit GPIO expansion board to output
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* a binary counter.
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*
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* Copyright (c) 2012-2013 Gordon Henderson.
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***********************************************************************
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* This file is part of wiringPi:
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* https://github.com/WiringPi/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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#include <mcp23017.h>
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#define Q2W_BASE 100
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int main (void)
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{
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int i, bit ;
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// Enable the on-goard GPIO
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wiringPiSetup () ;
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// Add in the mcp23017 on the q2w board
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mcp23017Setup (Q2W_BASE, 0x20) ;
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printf ("Raspberry Pi - quite2Wire MCP23017 Test\n") ;
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// On-board button Input:
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pinMode (0, INPUT) ;
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// First 10 pins on q2w board as outputs:
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for (i = 0 ; i < 10 ; ++i)
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pinMode (Q2W_BASE + i, OUTPUT) ;
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// Last pin as an input with the internal pull-up enabled
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pinMode (Q2W_BASE + 15, INPUT) ;
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pullUpDnControl (Q2W_BASE + 15, PUD_UP) ;
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// Loop, outputting a binary number,
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// Go faster with the button, or stop if the
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// on-board button is pushed
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for (;;)
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{
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for (i = 0 ; i < 1024 ; ++i)
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{
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for (bit = 0 ; bit < 10 ; ++bit)
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digitalWrite (Q2W_BASE + bit, i & (1 << bit)) ;
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while (digitalRead (0) == HIGH) // While pushed
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delay (1) ;
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if (digitalRead (Q2W_BASE + 15) == HIGH) // Not Pushed
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delay (100) ;
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}
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}
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return 0 ;
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}
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