mcp23016reg.h

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/*
 * mcp23016:
 *  Copyright (c) 2012-2013 Gordon Henderson
 *
 *  Header file for code using the MCP23016 GPIO expander
 *  chip.
 ***********************************************************************
 * 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 <http://www.gnu.org/licenses/>.
 ***********************************************************************
 */

// MCP23016 Registers

#define MCP23016_GP0        0x00
#define MCP23016_GP1        0x01
#define MCP23016_OLAT0      0x02
#define MCP23016_OLAT1      0x03
#define MCP23016_IPOL0      0x04
#define MCP23016_IPOL1      0x05
#define MCP23016_IODIR0     0x06
#define MCP23016_IODIR1     0x07
#define MCP23016_INTCAP0    0x08
#define MCP23016_INTCAP1    0x09
#define MCP23016_IOCON0     0x0A
#define MCP23016_IOCON1     0x0B

// Bits in the IOCON register

#define IOCON_IARES 0x01

// Default initialisation mode

#define IOCON_INIT  0