MySensors 2.1.1 release (#752)

* Bump version to 2.2.0-beta (#713)

* OTA: Add incoming FW block check (#718)

* Linux: Add support for SPIDEV (#734)

RPi and Linux refactor.

Add GPIO Sysfs for GPIO operations.

Update configure script.

Fix some cppcheck warnings.

Add serial emulation that prints to stdout.

Fix some file headers.

* Fix getControllerConfig() (#737)

* Rename MyHwATmega328 to MyHwAVR (#738)

* AVR: Restrict fast pin function use (#739)

* Fix signing presentation bug (#740)

* Consolidate open PRs for bugfix release (#741)

* Revert "Bump version to 2.2.0-beta" (#744)

* Merge Master into Dev (#745)

* Fix spi flash error when compiling in Arduino IDE 1.6.6

* Bump minor version

* Fixed "invalid suffix on literal" warning

* Fix addressing bug in _doSign bitfield

* Make sure nodes not supporting signing informs GW

A node that does not support signing, still needs to inform the
gateway about this to make sure the gateway carries a valid signing
requirement table when a node Id that was requiering signing stops
doing this.
This fixes #286.

* Prevent SecureActuator from accepting ACKs as commands

As ACKs are not currently signed, allowing ACKs as commands
is a considerable security hole for this sketch. This is now resolved.

* Backport of bugfix (#259) in repeaters when forwarding signed messages

* Bumped version to 1.5.2

* Corrected doSign variable name (was _doSign)

* Bumped version to 1.5.3

* Add NULL termination to payloads

Messages addressed to "this" node, will have a null char
appended to the payload after message verification is
done, because some "getters" assume the message being a
string.

* MySensors 2.1.1 release

drivers/Linux/GPIO.h

@@ -0,0 +1,91 @@
+/*
+ * The MySensors Arduino library handles the wireless radio link and protocol
+ * between your home built sensors/actuators and HA controller of choice.
+ * The sensors forms a self healing radio network with optional repeaters. Each
+ * repeater and gateway builds a routing tables in EEPROM which keeps track of the
+ * network topology allowing messages to be routed to nodes.
+ *
+ * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
+ * Copyright (C) 2013-2017 Sensnology AB
+ * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
+ *
+ * Documentation: http://www.mysensors.org
+ * Support Forum: http://forum.mysensors.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#ifndef GPIO_h
+#define	GPIO_h
+
+#include <stdint.h>
+
+#define INPUT 0
+#define OUTPUT 1
+
+#define LOW 0
+#define HIGH 1
+
+/**
+ * @brief GPIO class
+ */
+class GPIO
+{
+
+public:
+	/**
+	 * @brief GPIO constructor.
+	 */
+	GPIO();
+	/**
+	 * @brief GPIO copy constructor.
+	 */
+	GPIO(const GPIO& other);
+	/**
+	 * @brief GPIO destructor.
+	 */
+	~GPIO();
+	/**
+	 * @brief Configures the specified pin to behave either as an input or an output.
+	 *
+	 * @param pin The number of the pin.
+	 * @param mode INPUT or OUTPUT.
+	 */
+	void pinMode(uint8_t pin, uint8_t mode);
+	/**
+	 * @brief Write a high or a low value for the given pin.
+	 *
+	 * @param pin number.
+	 * @param value HIGH or LOW.
+	 */
+	void digitalWrite(uint8_t pin, uint8_t value);
+	/**
+	 * @brief Reads the value from a specified pin.
+	 *
+	 * @param pin The number of the pin.
+	 * @return HIGH or LOW.
+	 */
+	uint8_t digitalRead(uint8_t pin);
+	/**
+	 * @brief Arduino compatibility function, returns the same given pin.
+	 *
+	 * @param pin The number of the pin.
+	 * @return The same parameter pin number.
+	 */
+	uint8_t digitalPinToInterrupt(uint8_t pin);
+	/**
+	 * @brief Overloaded assign operator.
+	 *
+	 */
+	GPIO& operator=(const GPIO& other);
+
+private:
+	int lastPinNum; //!< @brief Highest pin number supported.
+	uint8_t *exportedPins; //!< @brief Array with information of which pins were exported.
+};
+
+extern GPIO gpio;
+
+#endif