49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
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/*
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* mcp23016:
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* Copyright (c) 2012-2013 Gordon Henderson
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*
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* Header file for code using the MCP23016 GPIO expander
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* chip.
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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
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* published by the Free Software Foundation, either version 3 of the
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* License, or (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
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* License along with wiringPi.
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* If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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// MCP23016 Registers
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#define MCP23016_GP0 0x00
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#define MCP23016_GP1 0x01
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#define MCP23016_OLAT0 0x02
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#define MCP23016_OLAT1 0x03
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#define MCP23016_IPOL0 0x04
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#define MCP23016_IPOL1 0x05
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#define MCP23016_IODIR0 0x06
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#define MCP23016_IODIR1 0x07
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#define MCP23016_INTCAP0 0x08
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#define MCP23016_INTCAP1 0x09
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#define MCP23016_IOCON0 0x0A
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#define MCP23016_IOCON1 0x0B
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// Bits in the IOCON register
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#define IOCON_IARES 0x01
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// Default initialisation mode
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#define IOCON_INIT 0
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