49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
|
|
* 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
|