initial cleanup and mapping

wiringPi/mcp23016reg.h

@@ -0,0 +1,48 @@
+/*
+ * 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