; i2c_expander.inc
;
; Copyright (C) 2006,2007 Nuno Sucena Almeida
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program 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 General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
;

; MCP23016 I/O Expanders

;	define commands of table 1-3 page 4 of MCP23016 datasheet
; Data Port Registers:
#define	GP0	H'0'
#define GP1	H'1'

; Output Latch Registers:
#define	OLAT0	H'2'
#define	OLAT1	H'3'

; Input Polarity Registers
#define	IPOL0	H'4'
#define	IPOL1	H'5'

; I/O Direction Registers:
;	if a bit is set '1' the pin becomes an input
;	and if clear '0' it becomes an output.
#define	IODIR0	H'6'
#define	IODIR1	H'7'

; Interrupt Capture Registers:
#define	INTCAP0	H'8'
#define INTCAP1	H'9'

; I/O Expander Control Register:
#define	IOCON0	H'A'
#define	IOCON1	H'B'