added libraries and clean up

source/libraries/INPUT_MCP23017/INPUT_MCP23017.cpp

@@ -0,0 +1,115 @@
+#include <Wire.h>
+
+#include "Arduino.h"
+#include "INPUT_MCP23017.h"
+
+void INPUT_MCP23017::begin(uint8_t addr,CallbackFunction cbF) {
+	Wire.begin();
+	
+	if (addr > 7)
+		_addr = 7;
+	else _addr =  addr;
+	
+	_callbackFunction = cbF;
+		
+	// set defaults!
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write((byte)MCP23017_IODIRA);
+	Wire.write(0xFF);  // all inputs on port A
+	Wire.endTransmission();
+
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_IODIRB);
+	Wire.write(0xFF);  // all inputs on port B
+	Wire.endTransmission();
+	
+	
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPPUA); 
+	Wire.write(0xFF);	// all pullup resistors on port A
+	Wire.endTransmission();
+	
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPPUB); 
+	Wire.write(0xFF);	// all pullup resistors on port B
+	Wire.endTransmission();
+
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write((byte)MCP23017_IPOLA);
+	Wire.write(0xFF);  // inverse all inputs
+	Wire.endTransmission();
+
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_IPOLB);
+	Wire.write(0xFF);    // inverse all inputs
+	Wire.endTransmission();
+
+	//init start values
+	uint8_t pin,bank;
+	//read bank A
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPIOA);
+	Wire.endTransmission();
+    Wire.requestFrom(MCP23017_ADDRESS | _addr, 1);
+	bank = Wire.read();
+	for (pin=0; pin<8; pin++) 
+		_value[pin] = (bank >> pin) & 0x1;
+	//read bank B
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPIOB);
+	Wire.endTransmission();
+    Wire.requestFrom(MCP23017_ADDRESS | _addr, 1);
+	bank = Wire.read();
+	for (pin=8; pin<16; pin++) 
+		_value[pin] = (bank >> (pin-8)) & 0x1;	 	
+}
+
+void INPUT_MCP23017::loop() {
+	uint8_t pin,bank;
+	int value;
+	//read bank A
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPIOA);
+	Wire.endTransmission();
+    Wire.requestFrom(MCP23017_ADDRESS | _addr, 1);
+	bank = Wire.read();
+	for (pin=0; pin<8; pin++) {
+		value = (bank >> pin) & 0x1;
+		if (_value[pin] != value) {
+			_value[pin] = value;
+		(*_callbackFunction)(_addr,pin,value);
+		}
+	}  	
+	//read bank B
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);
+	Wire.write(MCP23017_GPIOB);
+	Wire.endTransmission();
+    Wire.requestFrom(MCP23017_ADDRESS | _addr, 1);
+	bank = Wire.read();
+	for (pin=8; pin<16; pin++) {
+		value = (bank >> (pin-8)) & 0x1;
+		if (_value[pin] != value) {
+			_value[pin] = value;
+		(*_callbackFunction)(_addr,pin,value);
+		}		
+	} 
+}
+
+int INPUT_MCP23017::getSpecificValue(uint8_t pin) {
+	if (pin > 16)
+		return LOW;
+	Wire.beginTransmission(MCP23017_ADDRESS | _addr);	
+	uint8_t p = pin;
+	if (pin > 8) {
+		Wire.write(MCP23017_GPIOB);
+		p -= 8;
+	} else 
+		Wire.write(MCP23017_GPIOA);
+	Wire.endTransmission();
+	uint8_t	bank = Wire.read();
+	int value = (bank >> p) & 0x1;
+	_value[pin] = value;
+	return value;
+}
+
+

source/libraries/INPUT_MCP23017/INPUT_MCP23017.h

@@ -0,0 +1,51 @@
+/*
+  INPUT_MCP23017.h - Library for reading inputs from MCP23017 port Expander
+*/
+#ifndef INPUT_MCP23017_h
+#define INPUT_MCP23017_h
+
+#if !defined(CallbackFunction)
+typedef void (*CallbackFunction)(int,int,int);
+#endif
+
+class INPUT_MCP23017
+{
+	public:
+		void begin(uint8_t addr,CallbackFunction cbF);
+		void loop(void);
+		int getSpecificValue(uint8_t pin);
+	private:
+		uint8_t _addr;
+		int _value[16];
+		CallbackFunction _callbackFunction;
+};
+
+#define MCP23017_ADDRESS 0x20
+
+// registers (from https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/Adafruit_MCP23017.h)
+#define MCP23017_IODIRA 0x00
+#define MCP23017_IPOLA 0x02
+#define MCP23017_GPINTENA 0x04
+#define MCP23017_DEFVALA 0x06
+#define MCP23017_INTCONA 0x08
+#define MCP23017_IOCONA 0x0A
+#define MCP23017_GPPUA 0x0C
+#define MCP23017_INTFA 0x0E
+#define MCP23017_INTCAPA 0x10
+#define MCP23017_GPIOA 0x12
+#define MCP23017_OLATA 0x14
+
+#define MCP23017_IODIRB 0x01
+#define MCP23017_IPOLB 0x03
+#define MCP23017_GPINTENB 0x05
+#define MCP23017_DEFVALB 0x07
+#define MCP23017_INTCONB 0x09
+#define MCP23017_IOCONB 0x0B
+#define MCP23017_GPPUB 0x0D
+#define MCP23017_INTFB 0x0F
+#define MCP23017_INTCAPB 0x11
+#define MCP23017_GPIOB 0x13
+#define MCP23017_OLATB 0x15
+
+
+#endif