Basic support for esp8266 platform

This includes empty stubs for most core Arduino functions.
Need to actually implement all those digital reads writes whatever.
Need to prebuild toolchains (xtensa-elf-lx106) for 3 platforms and put them on some download server.
Need to do the same with esptool.
Need to fix 0x40000 binary generation and add correct upload commands.
Maybe even implement uploads over WiFi.

.gitignore

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+app/bin/
+app/pde.jar
+build/macosx/work/
+core/bin/
+core/core.jar
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.o
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.sym
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.o
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.map
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lss
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.elf
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.eep
+hardware/arduino/bootloaders/caterina_LUFA/.dep/
+build/libastylej-*.zip
+build/windows/work/
+build/windows/jre.zip
+build/windows/libastylej*
+build/windows/arduino-*.zip
+build/windows/dist/gcc-*.tar.gz
+build/windows/launch4j-*
+build/windows/launcher/launch4j
+build/windows/WinAVR-*.zip
+build/macosx/arduino-*.zip
+build/macosx/dist/gcc-*.tar.gz
+build/macosx/libastylej*
+build/macosx/appbundler*.jar
+build/linux/work/
+build/linux/dist/*.tar.gz
+build/linux/dist/*.tar.bz2
+build/linux/*.tgz
+build/linux/*.zip
+build/linux/libastylej*
+test-bin
+*.iml
+.idea
+.DS_Store
+build/windows/launch4j-*
+build/windows/launcher/launch4j
+build/windows/WinAVR-*.zip
+hardware/arduino/avr/libraries/Bridge/examples/XivelyClient/passwords.h
+avr-toolchain-*.zip

README.md

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+Arduino
+========
+
+* Arduino is an open-source physical computing platform based on a simple i/o
+board and a development environment that implements the Processing/Wiring
+language. Arduino can be used to develop stand-alone interactive objects or
+can be connected to software on your computer (e.g. Flash, Processing, MaxMSP).
+The boards can be assembled by hand or purchased preassembled; the open-source
+IDE can be downloaded for free.
+
+* For more information, see the website at: http://www.arduino.cc/
+or the forums at: http://arduino.cc/forum/
+
+* To report a *bug* in the software or to request *a simple enhancement* go to:
+http://github.com/arduino/Arduino/issues
+
+* More complex requests and technical discussion should go on the Arduino Developers
+mailing list:
+https://groups.google.com/a/arduino.cc/forum/#!forum/developers
+
+* If you're interested in modifying or extending the Arduino software, we strongly 
+suggest discussing your ideas on the Developers mailing list *before* starting
+to work on them. That way you can coordinate with the Arduino Team and others,
+giving your work a higher chance of being integrated into the official release
+https://groups.google.com/a/arduino.cc/forum/#!forum/developers
+
+Installation
+------------
+Detailed instructions are in reference/Guide_Windows.html and
+reference/Guide_MacOSX.html.  For Linux, see the Arduino playground:
+http://www.arduino.cc/playground/Learning/Linux
+
+Credits
+--------
+Arduino is an open source project, supported by many.
+
+The Arduino team is composed of Massimo Banzi, David Cuartielles, Tom Igoe,
+Gianluca Martino, Daniela Antonietti, and David A. Mellis.
+
+Arduino uses the [GNU avr-gcc toolchain](http://gcc.gnu.org/wiki/avr-gcc), [avrdude](http://www.nongnu.org/avrdude/), [avr-libc](http://www.nongnu.org/avr-libc/), and code from
+[Processing](http://www.processing.org) and [Wiring](http://wiring.org.co).
+
+Icon and about image designed by [ToDo](http://www.todo.to.it/)
+

boards.txt

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+##############################################################
+esp01.name=ESP-01
+
+esp01.upload.tool=esptool
+esp01.upload.speed=57600
+esp01.upload.wait_for_upload_port=true
+
+esp01.build.mcu=esp8266
+esp01.build.f_cpu=80000000L
+esp01.build.board=ESP8266_ESP01
+esp01.build.core=esp8266
+esp01.build.variant=esp01

cores/esp8266/Arduino.h

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+/*
+  Arduino.h - Main include file for the Arduino SDK
+  Copyright (c) 2005-2013 Arduino Team.  All right reserved.
+
+  This library 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 2.1 of the License, or (at your option) any later version.
+
+  This library 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 this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef Arduino_h
+#define Arduino_h
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <math.h>
+
+#include "binary.h"
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+void yield(void);
+
+#define HIGH 0x1
+#define LOW  0x0
+
+#define INPUT 0x0
+#define OUTPUT 0x1
+#define INPUT_PULLUP 0x2
+
+#define PI 3.1415926535897932384626433832795
+#define HALF_PI 1.5707963267948966192313216916398
+#define TWO_PI 6.283185307179586476925286766559
+#define DEG_TO_RAD 0.017453292519943295769236907684886
+#define RAD_TO_DEG 57.295779513082320876798154814105
+#define EULER 2.718281828459045235360287471352
+
+#define SERIAL  0x0
+#define DISPLAY 0x1
+
+#define LSBFIRST 0
+#define MSBFIRST 1
+
+#define CHANGE 1
+#define FALLING 2
+#define RISING 3
+
+#define DEFAULT 1
+#define EXTERNAL 0
+
+// undefine stdlib's abs if encountered
+#ifdef abs
+#undef abs
+#endif
+
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+#define abs(x) ((x)>0?(x):-(x))
+#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#define round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
+#define radians(deg) ((deg)*DEG_TO_RAD)
+#define degrees(rad) ((rad)*RAD_TO_DEG)
+#define sq(x) ((x)*(x))
+
+#define interrupts() sei()
+#define noInterrupts() cli()
+
+#define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
+#define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
+#define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
+
+#define lowByte(w) ((uint8_t) ((w) & 0xff))
+#define highByte(w) ((uint8_t) ((w) >> 8))
+
+#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
+#define bitSet(value, bit) ((value) |= (1UL << (bit)))
+#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
+#define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit))
+
+// avr-libc defines _NOP() since 1.6.2
+#ifndef _NOP
+#define _NOP() do { __asm__ volatile ("nop"); } while (0)
+#endif
+
+typedef unsigned int word;
+
+#define bit(b) (1UL << (b))
+
+typedef uint8_t boolean;
+typedef uint8_t byte;
+
+void init(void);
+void initVariant(void);
+
+int atexit(void (*func)()) __attribute__((weak));
+
+void pinMode(uint8_t, uint8_t);
+void digitalWrite(uint8_t, uint8_t);
+int digitalRead(uint8_t);
+int analogRead(uint8_t);
+void analogReference(uint8_t mode);
+void analogWrite(uint8_t, int);
+
+unsigned long millis(void);
+unsigned long micros(void);
+void delay(unsigned long);
+void delayMicroseconds(unsigned int us);
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout);
+
+void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
+uint8_t shiftIn(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder);
+
+void attachInterrupt(uint8_t, void (*)(void), int mode);
+void detachInterrupt(uint8_t);
+
+void setup(void);
+void loop(void);
+
+// Get the bit location within the hardware port of the given virtual pin.
+// This comes from the pins_*.c file for the active board configuration.
+
+#define analogInPinToBit(P) (P)
+
+// On the ATmega1280, the addresses of some of the port registers are
+// greater than 255, so we can't store them in uint8_t's.
+#define PROGMEM 
+
+extern const uint16_t PROGMEM port_to_mode_PGM[];
+extern const uint16_t PROGMEM port_to_input_PGM[];
+extern const uint16_t PROGMEM port_to_output_PGM[];
+
+extern const uint8_t PROGMEM digital_pin_to_port_PGM[];
+// extern const uint8_t PROGMEM digital_pin_to_bit_PGM[];
+extern const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[];
+extern const uint8_t PROGMEM digital_pin_to_timer_PGM[];
+
+// Get the bit location within the hardware port of the given virtual pin.
+// This comes from the pins_*.c file for the active board configuration.
+// 
+// These perform slightly better as macros compared to inline functions
+//
+#define digitalPinToPort(P) ( pgm_read_byte( digital_pin_to_port_PGM + (P) ) )
+#define digitalPinToBitMask(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM + (P) ) )
+#define digitalPinToTimer(P) ( pgm_read_byte( digital_pin_to_timer_PGM + (P) ) )
+#define analogInPinToBit(P) (P)
+#define portOutputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_output_PGM + (P))) )
+#define portInputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_input_PGM + (P))) )
+#define portModeRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_mode_PGM + (P))) )
+
+#define NOT_A_PIN 0
+#define NOT_A_PORT 0
+
+#define NOT_AN_INTERRUPT -1
+
+#ifdef ARDUINO_MAIN
+#define PA 1
+#define PB 2
+#define PC 3
+#define PD 4
+#define PE 5
+#define PF 6
+#define PG 7
+#define PH 8
+#define PJ 10
+#define PK 11
+#define PL 12
+#endif
+
+#define NOT_ON_TIMER 0
+#define TIMER0A 1
+#define TIMER0B 2
+#define TIMER1A 3
+#define TIMER1B 4
+#define TIMER1C 5
+#define TIMER2  6
+#define TIMER2A 7
+#define TIMER2B 8
+
+#define TIMER3A 9
+#define TIMER3B 10
+#define TIMER3C 11
+#define TIMER4A 12
+#define TIMER4B 13
+#define TIMER4C 14
+#define TIMER4D 15
+#define TIMER5A 16
+#define TIMER5B 17
+#define TIMER5C 18
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#ifdef __cplusplus
+
+#include "WCharacter.h"
+#include "WString.h"
+/*
+#include "HardwareSerial.h"
+
+#include "USBAPI.h"
+#if defined(HAVE_HWSERIAL0) && defined(HAVE_CDCSERIAL)
+#error "Targets with both UART0 and CDC serial not supported"
+#endif
+*/
+
+uint16_t makeWord(uint16_t w);
+uint16_t makeWord(byte h, byte l);
+
+#define word(...) makeWord(__VA_ARGS__)
+
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
+
+void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
+void noTone(uint8_t _pin);
+
+// WMath prototypes
+long random(long);
+long random(long, long);
+void randomSeed(unsigned int);
+long map(long, long, long, long, long);
+
+#endif
+
+#include "pins_arduino.h"
+
+#endif

cores/esp8266/Client.h

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+/*
+  Client.h - Base class that provides Client
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library 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 2.1 of the License, or (at your option) any later version.
+
+  This library 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 this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef client_h
+#define client_h
+#include "Print.h"
+#include "Stream.h"
+#include "IPAddress.h"
+
+class Client : public Stream {
+
+public:
+  virtual int connect(IPAddress ip, uint16_t port) =0;
+  virtual int connect(const char *host, uint16_t port) =0;
+  virtual size_t write(uint8_t) =0;
+  virtual size_t write(const uint8_t *buf, size_t size) =0;
+  virtual int available() = 0;
+  virtual int read() = 0;
+  virtual int read(uint8_t *buf, size_t size) = 0;
+  virtual int peek() = 0;
+  virtual void flush() = 0;
+  virtual void stop() = 0;
+  virtual uint8_t connected() = 0;
+  virtual operator bool() = 0;
+protected:
+  uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); };
+};
+
+#endif