Merge branch 'beta' of https://github.com/z3t0/Arduino-IRremote into beta

Credits: https://github.com/LarsWH
Excerpt from PR:
```
Hi,

I added support for 'RC5 extended' in order to make this project:
https://www.instructables.com/id/Remote-Control-for-Lava-mMotion-Swing-Mounting-Bra/

The modification is working nicely in this single application. It has
not been tested elsewhere.

(I am new to Git and this is my first pull request ever. So please
excuse me if I have messed something up)

Kind regards,
Lars
```

Merged #522

Contributors.md

@@ -18,5 +18,7 @@ These are the active contributors of this project that you may contact if there
 - [philipphenkel](https://github.com/philipphenkel): Active Contributor
 - [MCUdude](https://github.com/MCUdude): Contributor
 - [marcmerlin](https://github.com/marcmerlin): Contributor (ESP32 port)
+- [bengtmartensson](https://github.com/bengtmartensson): Active Contributor
+- [MrBryonMiller](https://github.com/MrBryonMiller): Contributor
 
 Note: This list is being updated constantly so please let [z3t0](https://github.com/z3t0) know if you have been missed.

README.md

@@ -8,7 +8,7 @@ This library enables you to send and receive using infra-red signals on an Ardui
 
 Tutorials and more information will be made available on [the official homepage](http://z3t0.github.io/Arduino-IRremote/).
 
-## Version - 2.2.3
+## Version - 2.5.0b
 
 ## Installation
 1. Navigate to the [Releases](https://github.com/z3t0/Arduino-IRremote/releases) page.
@@ -19,7 +19,7 @@ Tutorials and more information will be made available on [the official homepage]
 
 
 ## FAQ
-- IR does not work right when I use Neopixels (aka WS2811/WS2812/WS2812B)  
+- IR does not work right when I use Neopixels (aka WS2811/WS2812/WS2812B)
 Whether you use the Adafruit Neopixel lib, or FastLED, interrupts get disabled on many lower end CPUs like the basic arduinos. In turn, this stops the IR interrupt handler from running when it needs to. There are some solutions to this on some processors, [see this page from Marc MERLIN](http://marc.merlins.org/perso/arduino/post_2017-04-03_Arduino-328P-Uno-Teensy3_1-ESP8266-ESP32-IR-and-Neopixels.html)
 
 
@@ -68,6 +68,20 @@ The table above lists the currently supported timers and corresponding send pins
 ## Usage
 - TODO (Check examples for now)
 
+## API documentation
+This project documents the library API using [Doxygen](http://www.doxygen.org).
+It is planned to make generated and up-to-date API documentation available online.
+
+To generate the API documentation,
+Doxygen, as well as [Graphviz](http://www.graphviz.org/) should be installed.
+(Note that on Windows, it may be necessary to add the Graphviz binary directory
+(something like `C:\Program Files\Graphviz2.38\bin`)
+to the `PATH` variable manually.)
+With Doxygen and Graphviz installed, issue the command
+`doxygen` from the command line in the main project directory, which will
+generate the API documentation in HTML format.
+The just generated `api-doc/index.html` can now be opened in a browser.
+
 ## Contributing
 If you want to contribute to this project:
 - Report bugs and errors

arduino-irremote.sublime-workspace

@@ -1,240 +0,0 @@
-{
-	"auto_complete":
-	{
-		"selected_items":
-		[
-			[
-				"vb",
-				"vboMatrix"
-			]
-		]
-	},
-	"buffers":
-	[
-	],
-	"build_system": "",
-	"build_system_choices":
-	[
-	],
-	"build_varint": "",
-	"command_palette":
-	{
-		"height": 275.0,
-		"last_filter": "blame",
-		"selected_items":
-		[
-			[
-				"blame",
-				"Git: Blame"
-			],
-			[
-				"install",
-				"Package Control: Install Package"
-			],
-			[
-				"diff",
-				"Git: Diff Current File"
-			],
-			[
-				"js",
-				"Set Syntax: JavaScript"
-			],
-			[
-				"i",
-				"Package Control: Install Package"
-			],
-			[
-				"instal",
-				"Package Control: Install Package"
-			]
-		],
-		"width": 510.0
-	},
-	"console":
-	{
-		"height": 126.0,
-		"history":
-		[
-			"import urllib.request,os,hashlib; h = '2915d1851351e5ee549c20394736b442' + '8bc59f460fa1548d1514676163dafc88'; pf = 'Package Control.sublime-package'; ipp = sublime.installed_packages_path(); urllib.request.install_opener( urllib.request.build_opener( urllib.request.ProxyHandler()) ); by = urllib.request.urlopen( 'http://packagecontrol.io/' + pf.replace(' ', '%20')).read(); dh = hashlib.sha256(by).hexdigest(); print('Error validating download (got %s instead of %s), please try manual install' % (dh, h)) if dh != h else open(os.path.join( ipp, pf), 'wb' ).write(by)"
-		]
-	},
-	"distraction_free":
-	{
-		"menu_visible": true,
-		"show_minimap": false,
-		"show_open_files": false,
-		"show_tabs": false,
-		"side_bar_visible": false,
-		"status_bar_visible": false
-	},
-	"expanded_folders":
-	[
-		"/C/Users/Rafi Khan/Documents/Arduino/libraries/Arduino-IRremote"
-	],
-	"file_history":
-	[
-		"/C/Users/Rafi Khan/Documents/Arduino/libraries/Arduino-IRremote/changelog.md",
-		"/C/Users/Rafi Khan/Documents/Development/Arduino-IRremote/arduino-irremote.sublime-project",
-		"/C/Users/Rafi Khan/Documents/Development/Arduino-IRremote/.gitignore",
-		"/C/Users/Rafi Khan/Documents/Development/magic/README.md",
-		"/C/Users/Rafi Khan/Documents/Development/magic/shader.frag",
-		"/C/Users/Rafi Khan/Documents/Development/magic/package.json",
-		"/C/Users/Rafi Khan/Documents/Development/magic/block.js",
-		"/C/Users/Rafi Khan/Documents/Development/magic/chunker.js",
-		"/C/Users/Rafi Khan/Documents/Development/magic/index.js",
-		"/C/Users/Rafi Khan/Documents/Development/magic/blocks",
-		"/C/Users/Rafi Khan/AppData/Roaming/Sublime Text 3/Packages/User/Preferences.sublime-settings",
-		"/C/Users/Rafi Khan/Documents/Development/magic/shader.vert",
-		"/C/Users/Rafi Khan/Documents/Development/magic/magic.sublime-project",
-		"/C/Users/Rafi Khan/Documents/Development/magic/node_modules/browserify/node_modules/syntax-error/node_modules/acorn/.tern-project",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/supermarket.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/takingavacation.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/TipCalculator.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/battleship.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/exam.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/pyglatin.py",
-		"/C/Users/Rafi Khan/OneDrive/Documents/School-RafiKhan/Grade 11/CS30/Python/student.py"
-	],
-	"find":
-	{
-		"height": 28.0
-	},
-	"find_in_files":
-	{
-		"height": 0.0,
-		"where_history":
-		[
-		]
-	},
-	"find_state":
-	{
-		"case_sensitive": false,
-		"find_history":
-		[
-			"i",
-			"Direction",
-			";",
-			";\n",
-			"north",
-			"cubeMatrix",
-			")\n",
-			"vec3.set",
-			"f",
-			";",
-			"();\n",
-			"render",
-			"this",
-			"y"
-		],
-		"highlight": true,
-		"in_selection": false,
-		"preserve_case": false,
-		"regex": false,
-		"replace_history":
-		[
-		],
-		"reverse": false,
-		"show_context": true,
-		"use_buffer2": true,
-		"whole_word": false,
-		"wrap": true
-	},
-	"groups":
-	[
-		{
-			"sheets":
-			[
-			]
-		}
-	],
-	"incremental_find":
-	{
-		"height": 28.0
-	},
-	"input":
-	{
-		"height": 66.0
-	},
-	"layout":
-	{
-		"cells":
-		[
-			[
-				0,
-				0,
-				1,
-				1
-			]
-		],
-		"cols":
-		[
-			0.0,
-			1.0
-		],
-		"rows":
-		[
-			0.0,
-			1.0
-		]
-	},
-	"menu_visible": true,
-	"output.find_results":
-	{
-		"height": 0.0
-	},
-	"pinned_build_system": "",
-	"project": "arduino-irremote.sublime-project",
-	"replace":
-	{
-		"height": 52.0
-	},
-	"save_all_on_build": true,
-	"select_file":
-	{
-		"height": 0.0,
-		"last_filter": "",
-		"selected_items":
-		[
-			[
-				"json",
-				"package.json"
-			],
-			[
-				"inde",
-				"index.js"
-			]
-		],
-		"width": 0.0
-	},
-	"select_project":
-	{
-		"height": 0.0,
-		"last_filter": "",
-		"selected_items":
-		[
-		],
-		"width": 0.0
-	},
-	"select_symbol":
-	{
-		"height": 0.0,
-		"last_filter": "",
-		"selected_items":
-		[
-		],
-		"width": 0.0
-	},
-	"selected_group": 0,
-	"settings":
-	{
-	},
-	"show_minimap": true,
-	"show_open_files": false,
-	"show_tabs": true,
-	"side_bar_visible": true,
-	"side_bar_width": 150.0,
-	"status_bar_visible": true,
-	"template_settings":
-	{
-	}
-}

changelog.md

@@ -1,8 +1,8 @@
-## 3.0.0 - 2017/09/14
+## 2.5.0
-- Changed default send pin on ATmega32u4 from 13 to 9.
+- Added Philips Extended RC-5 protocol support [PR #522] (https://github.com/z3t0/Arduino-IRremote/pull/522)
-	Note: this is a non-backwards compatible change as the behaviour of existing programs using this board for receiving WILL be affected. If you would like to use pin 13 as before then please search src/boarddefs.h for "32u4" and comment the line for pin 9 while uncommenting the line for pin 13
-
 
+## 2.4.0 - 2017/08/10
+ - Cleanup of hardware dependencies. Merge in SAM support [PR #437](https://github.com/z3t0/Arduino-IRremote/pull/437)
 
 ## 2.3.3 - 2017/03/31
 - Added ESP32 IR receive support [PR #427](https://github.com/z3t0/Arduino-IRremote/pull/425)

examples/IRremoteInfo/IRremoteInfo.ino

@@ -79,7 +79,7 @@ void dumpTIMER() {
 
 void dumpTimerPin() {
   Serial.print(F("IR Tx Pin: "));
-  Serial.println(TIMER_PWM_PIN);
+  Serial.println(SEND_PIN);
 }
 
 void dumpClock() {

examples/IRtest/IRtest.ino

@@ -10,7 +10,6 @@
  */
 
 #include <IRremote.h>
-#include <IRremoteInt.h>
 
 // Dumps out the decode_results structure.
 // Call this after IRrecv::decode()

examples/LegoPowerFunctionsSendDemo/LegoPowerFunctionsSendDemo.ino

@@ -4,7 +4,6 @@
  */
 
 #include <IRremote.h>
-#include <IRremoteInt.h>
 
 IRsend irsend;
 

library.json

@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/z3t0/Arduino-IRremote.git"
   },
-  "version": "2.3.3",
+  "version": "2.4.0",
   "frameworks": "arduino",
   "platforms": "atmelavr",
   "authors" :

library.properties

@@ -1,9 +1,9 @@
 name=IRremote
-version=2.2.3
+version=2.4.0
-author=shirriff
+author=shirriff, z3t0
-maintainer=shirriff
+maintainer=z3t0
 sentence=Send and receive infrared signals with multiple protocols
-paragraph=Send and receive infrared signals with multiple protocols
+paragraph=Find more information at https://github.com/z3t0/Arduino-IRremote
-category=Signal Input/Output
+category=Communication
-url=https://github.com/shirriff/Arduino-IRremote.git
+url=https://github.com/z3t0/Arduino-IRremote
 architectures=*

src/IRremote.cpp

@@ -20,11 +20,10 @@
 
 // Defining IR_GLOBAL here allows us to declare the instantiation of global variables
 #define IR_GLOBAL
-#	include "IRremote.h"
+#include "IRremote.h"
-#	include "IRremoteInt.h"
 #undef IR_GLOBAL
 
-#ifndef IR_TIMER_USE_ESP32
+#ifdef HAS_AVR_INTERRUPT_H
 #include <avr/interrupt.h>
 #endif
 
@@ -52,11 +51,12 @@ int  MATCH (int measured,  int desired)
  	DBG_PRINT(TICKS_HIGH(desired), DEC);
 
   bool passed = ((measured >= TICKS_LOW(desired)) && (measured <= TICKS_HIGH(desired)));
-  if (passed)
+  if (passed) {
     DBG_PRINTLN(F("?; passed"));
-  else
+  } else {
-    DBG_PRINTLN(F("?; FAILED")); 
+    DBG_PRINTLN(F("?; FAILED"));
- 	return passed;
+  }
+  return passed;
 }
 
 //+========================================================
@@ -68,7 +68,7 @@ int  MATCH_MARK (int measured_ticks,  int desired_us)
 	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
 	DBG_PRINT(F("us vs "));
 	DBG_PRINT(desired_us, DEC);
-	DBG_PRINT("us"); 
+	DBG_PRINT("us");
 	DBG_PRINT(": ");
 	DBG_PRINT(TICKS_LOW(desired_us + MARK_EXCESS) * USECPERTICK, DEC);
 	DBG_PRINT(F(" <= "));
@@ -78,11 +78,12 @@ int  MATCH_MARK (int measured_ticks,  int desired_us)
 
   bool passed = ((measured_ticks >= TICKS_LOW (desired_us + MARK_EXCESS))
                 && (measured_ticks <= TICKS_HIGH(desired_us + MARK_EXCESS)));
-  if (passed)
+  if (passed) {
     DBG_PRINTLN(F("?; passed"));
-  else
+  } else {
-    DBG_PRINTLN(F("?; FAILED")); 
+    DBG_PRINTLN(F("?; FAILED"));
- 	return passed;
+  }
+  return passed;
 }
 
 //+========================================================
@@ -94,7 +95,7 @@ int  MATCH_SPACE (int measured_ticks,  int desired_us)
 	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
 	DBG_PRINT(F("us vs "));
 	DBG_PRINT(desired_us, DEC);
-	DBG_PRINT("us"); 
+	DBG_PRINT("us");
 	DBG_PRINT(": ");
 	DBG_PRINT(TICKS_LOW(desired_us - MARK_EXCESS) * USECPERTICK, DEC);
 	DBG_PRINT(F(" <= "));
@@ -104,11 +105,12 @@ int  MATCH_SPACE (int measured_ticks,  int desired_us)
 
   bool passed = ((measured_ticks >= TICKS_LOW (desired_us - MARK_EXCESS))
                 && (measured_ticks <= TICKS_HIGH(desired_us - MARK_EXCESS)));
-  if (passed)
+  if (passed) {
     DBG_PRINTLN(F("?; passed"));
-  else
+  } else {
-    DBG_PRINTLN(F("?; FAILED")); 
+    DBG_PRINTLN(F("?; FAILED"));
- 	return passed;
+  }
+  return passed;
 }
 
 //+=============================================================================
@@ -123,11 +125,7 @@ int  MATCH_SPACE (int measured_ticks,  int desired_us)
 // As soon as first MARK arrives:
 //   Gap width is recorded; Ready is cleared; New logging starts
 //
-#ifdef IR_TIMER_USE_ESP32
-void IRTimer()
-#else
 ISR (TIMER_INTR_NAME)
-#endif
 {
 	TIMER_RESET;
 
@@ -189,6 +187,7 @@ ISR (TIMER_INTR_NAME)
 		 	break;
 	}
 
+#ifdef BLINKLED
 	// If requested, flash LED while receiving IR data
 	if (irparams.blinkflag) {
 		if (irdata == MARK)
@@ -197,4 +196,5 @@ ISR (TIMER_INTR_NAME)
 		else if (irparams.blinkpin) digitalWrite(irparams.blinkpin, LOW); // Turn user defined pin LED on
 				else BLINKLED_OFF() ;   // if no user defined LED pin, turn default LED pin for the hardware on
 	}
+#endif // BLINKLED
 }

src/IRremote.h

@@ -1,3 +1,7 @@
+/**
+ * @file IRremote.h
+ * @brief Public API to the library.
+ */
 
 //******************************************************************************
 // IRremote
@@ -21,7 +25,7 @@
 //------------------------------------------------------------------------------
 // The ISR header contains several useful macros the user may wish to use
 //
-#include "IRremoteInt.h"
+#include "private/IRremoteInt.h"
 
 //------------------------------------------------------------------------------
 // Supported IR protocols
@@ -94,10 +98,10 @@
 #define PRONTO_FALLBACK    true
 #define PRONTO_NOFALLBACK  false
 
-//------------------------------------------------------------------------------
+/**
-// An enumerated list of all supported formats
+ * An enum consisting of all supported formats.
-// You do NOT need to remove entries from this list when disabling protocols!
+ * You do NOT need to remove entries from this list when disabling protocols!
-//
+ */
 typedef
 	enum {
 		UNKNOWN      = -1,
@@ -122,9 +126,9 @@ typedef
 	}
 decode_type_t;
 
-//------------------------------------------------------------------------------
+/**
-// Set DEBUG to 1 for lots of lovely debug output
+ * Set DEBUG to 1 for lots of lovely debug output.
-//
+ */
 #define DEBUG  0
 
 //------------------------------------------------------------------------------
@@ -134,7 +138,13 @@ decode_type_t;
 #	define DBG_PRINT(...)    Serial.print(__VA_ARGS__)
 #	define DBG_PRINTLN(...)  Serial.println(__VA_ARGS__)
 #else
+/**
+ * If DEBUG, print the arguments, otherwise do nothing.
+ */
 #	define DBG_PRINT(...)
+/**
+ * If DEBUG, print the arguments as a line, otherwise do nothing.
+ */
 #	define DBG_PRINTLN(...)
 #endif
 
@@ -145,39 +155,71 @@ int  MATCH       (int measured, int desired) ;
 int  MATCH_MARK  (int measured_ticks, int desired_us) ;
 int  MATCH_SPACE (int measured_ticks, int desired_us) ;
 
-//------------------------------------------------------------------------------
+/**
-// Results returned from the decoder
+ * Results returned from the decoder
-//
+ */
 class decode_results
 {
 	public:
-		decode_type_t          decode_type;  // UNKNOWN, NEC, SONY, RC5, ...
+		decode_type_t          decode_type;  ///< UNKNOWN, NEC, SONY, RC5, ...
-		unsigned int           address;      // Used by Panasonic & Sharp [16-bits]
+		unsigned int           address;      ///< Used by Panasonic & Sharp [16-bits]
-		unsigned long          value;        // Decoded value [max 32-bits]
+		unsigned long          value;        ///< Decoded value [max 32-bits]
-		int                    bits;         // Number of bits in decoded value
+		int                    bits;         ///< Number of bits in decoded value
-		volatile unsigned int  *rawbuf;      // Raw intervals in 50uS ticks
+		volatile unsigned int  *rawbuf;      ///< Raw intervals in 50uS ticks
-		int                    rawlen;       // Number of records in rawbuf
+		int                    rawlen;       ///< Number of records in rawbuf
-		int                    overflow;     // true iff IR raw code too long
+		int                    overflow;     ///< true iff IR raw code too long
 };
 
-//------------------------------------------------------------------------------
+/**
-// Decoded value for NEC when a repeat code is received
+ * Decoded value for NEC when a repeat code is received
-//
+ */
 #define REPEAT 0xFFFFFFFF
 
-//------------------------------------------------------------------------------
+/**
-// Main class for receiving IR
+ * Main class for receiving IR
-//
+ */
 class IRrecv
 {
 	public:
+                /**
+                 * Instantiate the IRrecv class. Multiple instantiation is not supported.
+                 * @param recvpin Arduino pin to use. No sanity check is made.
+                 */
 		IRrecv (int recvpin) ;
+                /**
+                 * Instantiate the IRrecv class. Multiple instantiation is not supported.
+                 * @param recvpin Arduino pin to use, where a demodulating IR receiver is connected.
+                 * @param blinkpin pin to blink when receiving IR. Not supported by all hardware. No sanity check is made.
+                 */
 		IRrecv (int recvpin, int blinkpin);
 
+                /**
+                 * TODO: Why is this public???
+                 * @param blinkflag
+                 */
 		void  blink13    (int blinkflag) ;
+
+                /**
+                 * Attempt to decode the recently receive IR signal
+                 * @param results decode_results instance returning the decode, if any.
+                 * @return success of operation. TODO: convert to bool
+                 */
 		int   decode     (decode_results *results) ;
+
+                /**
+                 * Enable IR reception.
+                 */
 		void  enableIRIn ( ) ;
+
+                /**
+                 * Returns status of reception
+                 * @return true if no reception is on-going.
+                 */
 		bool  isIdle     ( ) ;
+
+                /**
+                 * Called to re-enable IR reception.
+                 */
 		void  resume     ( ) ;
 
 	private:
@@ -186,10 +228,17 @@ class IRrecv
 
 		//......................................................................
 #		if (DECODE_RC5 || DECODE_RC6)
-			// This helper function is shared by RC5 and RC6
+			/**
+                         *  This helper function is shared by RC5 and RC6
+                         */
 			int  getRClevel (decode_results *results,  int *offset,  int *used,  int t1) ;
 #		endif
 #		if DECODE_RC5
+                        /**
+                         * Try to decode the recently received IR signal as an RC5 signal-
+                         * @param results decode_results instance returning the decode, if any.
+                         * @return Success of the operation.
+                         */
 			bool  decodeRC5        (decode_results *results) ;
 #		endif
 #		if DECODE_RC6
@@ -253,13 +302,24 @@ class IRrecv
 #		endif
 } ;
 
-//------------------------------------------------------------------------------
+/**
-// Main class for sending IR
+ * Main class for sending IR
-//
+ */
 class IRsend
 {
 	public:
-		IRsend () { }
+#ifdef USE_SOFT_CARRIER
+
+		IRsend(int pin = SEND_PIN)
+		{
+			sendPin = pin;
+		}
+#else
+
+		IRsend()
+		{
+		}
+#endif
 
 		void  custom_delay_usec (unsigned long uSecs);
 		void  enableIROut 		(int khz) ;
@@ -270,6 +330,7 @@ class IRsend
 		//......................................................................
 #		if SEND_RC5
 			void  sendRC5        (unsigned long data,  int nbits) ;
+			void  sendRC5ext     (unsigned long addr, unsigned long cmd, boolean toggle);
 #		endif
 #		if SEND_RC6
 			void  sendRC6        (unsigned long data,  int nbits) ;
@@ -339,6 +400,20 @@ class IRsend
 #		if SEND_LEGO_PF
 			void  sendLegoPowerFunctions (uint16_t data, bool repeat = true) ;
 #		endif
+
+#ifdef USE_SOFT_CARRIER
+	private:
+		int sendPin;
+
+		unsigned int periodTime;
+		unsigned int periodOnTime;
+
+		void sleepMicros(unsigned long us);
+		void sleepUntilMicros(unsigned long targetTime);
+
+#else
+		const int sendPin = SEND_PIN;
+#endif
 } ;
 
 #endif

src/esp32.cpp

@@ -0,0 +1,38 @@
+#ifdef ESP32
+
+// This file contains functions specific to the ESP32.
+
+#include "IRremote.h"
+
+// "Idiot check"
+#ifdef USE_DEFAULT_ENABLE_IR_IN
+#error Must undef USE_DEFAULT_ENABLE_IR_IN
+#endif
+
+hw_timer_t *timer;
+void IRTimer(); // defined in IRremote.cpp, masqueraded as ISR(TIMER_INTR_NAME)
+
+//+=============================================================================
+// initialization
+//
+void  IRrecv::enableIRIn ( )
+{
+// Interrupt Service Routine - Fires every 50uS
+	// ESP32 has a proper API to setup timers, no weird chip macros needed
+	// simply call the readable API versions :)
+	// 3 timers, choose #1, 80 divider nanosecond precision, 1 to count up
+	timer = timerBegin(1, 80, 1);
+	timerAttachInterrupt(timer, &IRTimer, 1);
+	// every 50ns, autoreload = true
+	timerAlarmWrite(timer, 50, true);
+	timerAlarmEnable(timer);
+
+	// Initialize state machine variables
+	irparams.rcvstate = STATE_IDLE;
+	irparams.rawlen = 0;
+
+	// Set pin modes
+	pinMode(irparams.recvpin, INPUT);
+}
+
+#endif // ESP32

src/irRecv.cpp

@@ -1,10 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
-
-#ifdef IR_TIMER_USE_ESP32
-hw_timer_t *timer;
-void IRTimer(); // defined in IRremote.cpp
-#endif
 
 //+=============================================================================
 // Decodes the received IR message
@@ -120,19 +114,10 @@ IRrecv::IRrecv (int recvpin, int blinkpin)
 //+=============================================================================
 // initialization
 //
+#ifdef USE_DEFAULT_ENABLE_IR_IN
 void  IRrecv::enableIRIn ( )
 {
-// Interrupt Service Routine - Fires every 50uS
+// Interrupt Service Routine - Fires every 50uS
-#ifdef ESP32
-	// ESP32 has a proper API to setup timers, no weird chip macros needed
-	// simply call the readable API versions :)
-	// 3 timers, choose #1, 80 divider nanosecond precision, 1 to count up
-	timer = timerBegin(1, 80, 1);
-	timerAttachInterrupt(timer, &IRTimer, 1);
-	// every 50ns, autoreload = true
-	timerAlarmWrite(timer, 50, true);
-	timerAlarmEnable(timer);
-#else
 	cli();
 	// Setup pulse clock timer interrupt
 	// Prescale /8 (16M/8 = 0.5 microseconds per tick)
@@ -146,7 +131,6 @@ void  IRrecv::enableIRIn ( )
 	TIMER_RESET;
 
 	sei();  // enable interrupts
-#endif
 
 	// Initialize state machine variables
 	irparams.rcvstate = STATE_IDLE;
@@ -155,14 +139,17 @@ void  IRrecv::enableIRIn ( )
 	// Set pin modes
 	pinMode(irparams.recvpin, INPUT);
 }
+#endif // USE_DEFAULT_ENABLE_IR_IN
 
 //+=============================================================================
 // Enable/disable blinking of pin 13 on IR processing
 //
 void  IRrecv::blink13 (int blinkflag)
 {
+#ifdef BLINKLED
 	irparams.blinkflag = blinkflag;
 	if (blinkflag)  pinMode(BLINKLED, OUTPUT) ;
+#endif
 }
 
 //+=============================================================================

src/irSend.cpp

@@ -1,6 +1,6 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
+#ifdef SENDING_SUPPORTED
 //+=============================================================================
 void  IRsend::sendRaw (const unsigned int buf[],  unsigned int len,  unsigned int hz)
 {
@@ -15,14 +15,59 @@ void  IRsend::sendRaw (const unsigned int buf[],  unsigned int len,  unsigned in
 	space(0);  // Always end with the LED off
 }
 
+#ifdef USE_SOFT_CARRIER
+void inline IRsend::sleepMicros(unsigned long us)
+{
+#ifdef USE_SPIN_WAIT
+	sleepUntilMicros(micros() + us);
+#else
+	if (us > 0U) // Is this necessary? (Official docu https://www.arduino.cc/en/Reference/DelayMicroseconds does not tell.)
+		delayMicroseconds((unsigned int) us);
+#endif
+}
+
+void inline IRsend::sleepUntilMicros(unsigned long targetTime)
+{
+#ifdef USE_SPIN_WAIT
+	while (micros() < targetTime)
+		;
+#else
+        unsigned long now = micros();
+        if (now < targetTime)
+                sleepMicros(targetTime - now);
+#endif
+}
+#endif // USE_SOFT_CARRIER
+
 //+=============================================================================
 // Sends an IR mark for the specified number of microseconds.
 // The mark output is modulated at the PWM frequency.
 //
-void  IRsend::mark (unsigned int time)
+
+void IRsend::mark(unsigned int time)
 {
+#ifdef USE_SOFT_CARRIER
+	unsigned long start = micros();
+	unsigned long stop = start + time;
+	if (stop + periodTime < start)
+		// Counter wrap-around, happens very seldomly, but CAN happen.
+		// Just give up instead of possibly damaging the hardware.
+		return;
+
+	unsigned long nextPeriodEnding = start;
+	unsigned long now = micros();
+	while (now < stop) {
+		SENDPIN_ON(sendPin);
+		sleepMicros(periodOnTime);
+		SENDPIN_OFF(sendPin);
+		nextPeriodEnding += periodTime;
+		sleepUntilMicros(nextPeriodEnding);
+		now = micros();
+	}
+#else
 	TIMER_ENABLE_PWM; // Enable pin 3 PWM output
 	if (time > 0) custom_delay_usec(time);
+#endif
 }
 
 //+=============================================================================
@@ -54,13 +99,16 @@ void  IRsend::space (unsigned int time)
 //
 void  IRsend::enableIROut (int khz)
 {
-// FIXME: implement ESP32 support, see IR_TIMER_USE_ESP32 in boarddefs.h
+#ifdef USE_SOFT_CARRIER
-#ifndef ESP32
+	periodTime = (1000U + khz/2) / khz; // = 1000/khz + 1/2 = round(1000.0/khz)
+	periodOnTime = periodTime * DUTY_CYCLE / 100U - PULSE_CORRECTION;
+#endif
+	
 	// Disable the Timer2 Interrupt (which is used for receiving IR)
 	TIMER_DISABLE_INTR; //Timer2 Overflow Interrupt
 
-	pinMode(TIMER_PWM_PIN, OUTPUT);
+	pinMode(sendPin, OUTPUT);
-	digitalWrite(TIMER_PWM_PIN, LOW); // When not sending PWM, we want it low
+	SENDPIN_OFF(sendPin); // When not sending, we want it low
 
 	// COM2A = 00: disconnect OC2A
 	// COM2B = 00: disconnect OC2B; to send signal set to 10: OC2B non-inverted
@@ -68,7 +116,6 @@ void  IRsend::enableIROut (int khz)
 	// CS2  = 000: no prescaling
 	// The top value for the timer.  The modulation frequency will be SYSCLOCK / 2 / OCR2A.
 	TIMER_CONFIG_KHZ(khz);
-#endif
 }
 
 //+=============================================================================
@@ -88,3 +135,4 @@ void IRsend::custom_delay_usec(unsigned long uSecs) {
   //}
 }
 
+#endif // SENDING_SUPPORTED

src/ir_Aiwa.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                         AAA   IIIII  W   W   AAA

src/ir_Denon.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 // Reverse Engineered by looking at RAW dumps generated by IRremote
 

src/ir_Dish.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                       DDDD   IIIII   SSSS  H   H

src/ir_JVC.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                             JJJJJ  V   V   CCCC

src/ir_LG.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                               L       GGGG

src/ir_Lego_PF.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 #include "ir_Lego_PF_BitStreamEncoder.h"
 
 //==============================================================================

src/ir_Mitsubishi.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //    MMMMM  IIIII TTTTT   SSSS  U   U  BBBB   IIIII   SSSS  H   H  IIIII

src/ir_NEC.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                           N   N  EEEEE   CCCC

src/ir_Panasonic.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //       PPPP    AAA   N   N   AAA    SSSS   OOO   N   N  IIIII   CCCC

src/ir_RC5_RC6.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //+=============================================================================
 // Gets one undecoded level at a time from the raw buffer.
@@ -78,6 +77,73 @@ void  IRsend::sendRC5 (unsigned long data,  int nbits)
 
 	space(0);  // Always end with the LED off
 }
+
+void  IRsend::sendRC5ext (unsigned long addr, unsigned long cmd, boolean toggle)
+{
+	// Set IR carrier frequency
+	enableIROut(36);
+	
+	unsigned long addressBits = 5;
+	unsigned long commandBits = 7;
+	unsigned long nbits = addressBits + commandBits;
+	
+	// Start
+	mark(RC5_T1);
+	
+	// Bit #6 of the command part, but inverted!
+	unsigned long cmdBit6 = (1UL << (commandBits-1)) & cmd;
+	if (cmdBit6) {
+		// Inverted (1 -> 0 = mark-to-space)
+		mark(RC5_T1);
+		space(RC5_T1);
+	} else {
+		space(RC5_T1);
+		mark(RC5_T1);
+	}
+	commandBits--;
+
+	// Toggle bit
+	static int toggleBit = 1;
+	if (toggle) {
+		if (toggleBit == 0) {
+			toggleBit = 1;
+		} else {
+			toggleBit = 0;
+		}
+	}
+	if (toggleBit) {
+		space(RC5_T1);
+		mark(RC5_T1);
+	} else {
+		mark(RC5_T1);
+		space(RC5_T1);
+	}
+
+	// Address
+	for (unsigned long  mask = 1UL << (addressBits - 1);  mask;  mask >>= 1) {
+		if (addr & mask) {
+			space(RC5_T1); // 1 is space, then mark
+			mark(RC5_T1);
+		} else {
+			mark(RC5_T1);
+			space(RC5_T1);
+		}
+	}
+	
+	// Command
+	for (unsigned long  mask = 1UL << (commandBits - 1);  mask;  mask >>= 1) {
+		if (cmd & mask) {
+			space(RC5_T1); // 1 is space, then mark
+			mark(RC5_T1);
+		} else {
+			mark(RC5_T1);
+			space(RC5_T1);
+		}
+	}
+
+	space(0);  // Always end with the LED off
+}
+
 #endif
 
 //+=============================================================================

src/ir_Samsung.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //              SSSS   AAA    MMM    SSSS  U   U  N   N   GGGG

src/ir_Sanyo.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                      SSSS   AAA   N   N  Y   Y   OOO

src/ir_Sharp.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                       SSSS  H   H   AAA   RRRR   PPPP

src/ir_Sony.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //                           SSSS   OOO   N   N  Y   Y

src/ir_Template.cpp

@@ -92,7 +92,6 @@ Regards,
 */
 
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //

src/ir_Whynter.cpp

@@ -1,5 +1,4 @@
 #include "IRremote.h"
-#include "IRremoteInt.h"
 
 //==============================================================================
 //               W   W  H   H  Y   Y N   N TTTTT EEEEE  RRRRR

src/private/IRremoteInt.h

@@ -18,15 +18,9 @@
 #define IRremoteint_h
 
 //------------------------------------------------------------------------------
-// Include the right Arduino header
+// Include the Arduino header
 //
-#if defined(ARDUINO) && (ARDUINO >= 100)
+#include <Arduino.h>
-#	include <Arduino.h>
-#else
-#	if !defined(IRPRONTO)
-#		include <WProgram.h>
-#	endif
-#endif
 
 //------------------------------------------------------------------------------
 // This handles definition and access to global variables
@@ -40,19 +34,22 @@
 //------------------------------------------------------------------------------
 // Information for the Interrupt Service Routine
 //
-#define RAWBUF  101  // Maximum length of raw duration buffer
+#define RAWBUF  101  ///< Maximum length of raw duration buffer. Must be odd.
 
+/**
+  * This struct is used to communicate with the ISR (interrupt service routine).
+  */
 typedef
 	struct {
 		// The fields are ordered to reduce memory over caused by struct-padding
-		uint8_t       rcvstate;        // State Machine state
+		uint8_t       rcvstate;        ///< State Machine state
-		uint8_t       recvpin;         // Pin connected to IR data from detector
+		uint8_t       recvpin;         ///< Pin connected to IR data from detector
 		uint8_t       blinkpin;
-		uint8_t       blinkflag;       // true -> enable blinking of pin on IR processing
+		uint8_t       blinkflag;       ///< true -> enable blinking of pin on IR processing
-		uint8_t       rawlen;          // counter of entries in rawbuf
+		uint8_t       rawlen;          ///< counter of entries in rawbuf
-		unsigned int  timer;           // State timer, counts 50uS ticks.
+		unsigned int  timer;           ///< State timer, counts 50uS ticks.
-		unsigned int  rawbuf[RAWBUF];  // raw data
+		unsigned int  rawbuf[RAWBUF];  ///< raw data
-		uint8_t       overflow;        // Raw buffer overflow occurred
+		uint8_t       overflow;        ///< Raw buffer overflow occurred
 	}
 irparams_t;
 
@@ -63,9 +60,11 @@ irparams_t;
 #define STATE_STOP      5
 #define STATE_OVERFLOW  6
 
-// Allow all parts of the code access to the ISR data
+/**
-// NB. The data can be changed by the ISR at any time, even mid-function
+ * Allow all parts of the code access to the ISR data
-// Therefore we declare it as "volatile" to stop the compiler/CPU caching it
+ * NB. The data can be changed by the ISR at any time, even mid-function
+ * Therefore we declare it as "volatile" to stop the compiler/CPU caching it
+ */
 EXTERN  volatile irparams_t  irparams;
 
 //------------------------------------------------------------------------------
@@ -85,8 +84,12 @@ EXTERN  volatile irparams_t  irparams;
 // Pulse parameters in uSec
 //
 
-// Due to sensor lag, when received, Marks  tend to be 100us too long and
+/**
-//                                   Spaces tend to be 100us too short
+ * When received, marks  tend to be too long and
+ * spaces tend to be too short.
+ * To compensate for this, MARK_EXCESS is subtracted from all marks,
+ * and added to all spaces.
+ */
 #define MARK_EXCESS    100
 
 // Upper and Lower percentage tolerances in measurements

src/private/boarddefs.h

@@ -20,6 +20,32 @@
 #ifndef boarddefs_h
 #define boarddefs_h
 
+// Define some defaults, that some boards may like to override
+// (This is to avoid negative logic, ! DONT_... is just awkward.)
+
+// This board has/needs the avr/interrupt.h
+#define HAS_AVR_INTERRUPT_H
+
+// Define if sending is supported
+#define SENDING_SUPPORTED
+
+// If defined, a standard enableIRIn function will be define.
+// Undefine for boards supplying their own.
+#define USE_DEFAULT_ENABLE_IR_IN
+
+// Duty cycle in percent for sent signals. Presently takes effect only with USE_SOFT_CARRIER
+#define DUTY_CYCLE 50
+
+// If USE_SOFT_CARRIER, this amount (in micro seconds) is subtracted from the
+// on-time of the pulses.
+#define PULSE_CORRECTION 3
+
+// digitalWrite is supposed to be slow. If this is an issue, define faster,
+// board-dependent versions of these macros SENDPIN_ON(pin) and SENDPIN_OFF(pin).
+// Portable, possibly slow, default definitions are given at the end of this file.
+// If defining new versions, feel free to ignore the pin argument if it
+// is not configurable on the current board.
+
 //------------------------------------------------------------------------------
 // Defines for blinking the LED
 //
@@ -39,11 +65,31 @@
 #	define BLINKLED_ON()   (PORTD |= B00000001)
 #	define BLINKLED_OFF()  (PORTD &= B11111110)
 
-// No system LED on ESP32, disable blinking
+#elif defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)
+#	define BLINKLED        LED_BUILTIN
+#	define BLINKLED_ON()   (digitalWrite(LED_BUILTIN, HIGH))
+#	define BLINKLED_OFF()  (digitalWrite(LED_BUILTIN, LOW))
+
+#	define USE_SOFT_CARRIER
+	// Define to use spin wait instead of delayMicros()
+//#	define USE_SPIN_WAIT
+#       undef USE_DEFAULT_ENABLE_IR_IN
+
+        // The default pin used used for sending.
+#	define SEND_PIN 9
+
 #elif defined(ESP32)
-#	define BLINKLED        255
+        // No system LED on ESP32, disable blinking by NOT defining BLINKLED
-#	define BLINKLED_ON()   1
+
-#	define BLINKLED_OFF()  1
+        // avr/interrupt.h is not present
+#       undef HAS_AVR_INTERRUPT_H
+
+        // Sending not implemented
+#       undef SENDING_SUPPORTED
+
+        // Supply own enbleIRIn
+#       undef USE_DEFAULT_ENABLE_IR_IN
+
 #else
 #	define BLINKLED        13
 #	define BLINKLED_ON()  (PORTB |= B00100000)
@@ -115,7 +161,7 @@
 || defined(__AVR_ATmega164P__)
 	//#define IR_USE_TIMER1   // tx = pin 13
 	#define IR_USE_TIMER2     // tx = pin 14
-	
+
 //MegaCore - ATmega64, ATmega128
 #elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
  	#define IR_USE_TIMER1     // tx = pin 13
@@ -138,6 +184,10 @@
 
 #elif defined(ESP32)
 	#define IR_TIMER_USE_ESP32
+
+#elif defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)
+	#define TIMER_PRESCALER_DIV 64
+
 #else
 // Arduino Duemilanove, Diecimila, LilyPad, Mini, Fio, Nano, etc
 // ATmega48, ATmega88, ATmega168, ATmega328
@@ -190,17 +240,17 @@
 
 //-----------------
 #if defined(CORE_OC2B_PIN)
-#	define TIMER_PWM_PIN  CORE_OC2B_PIN  // Teensy
+#	define SEND_PIN  CORE_OC2B_PIN  // Teensy
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-#	define TIMER_PWM_PIN  9              // Arduino Mega
+#	define SEND_PIN  9              // Arduino Mega
 #elif defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__) \
 || defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) \
 || defined(__AVR_ATmega324P__) || defined(__AVR_ATmega324A__) \
 || defined(__AVR_ATmega324PA__) || defined(__AVR_ATmega164A__) \
 || defined(__AVR_ATmega164P__)
-#	define TIMER_PWM_PIN  14             // MightyCore
+#	define SEND_PIN  14             // MightyCore
 #else
-#	define TIMER_PWM_PIN  3              // Arduino Duemilanove, Diecimila, LilyPad, etc
+#	define SEND_PIN  3              // Arduino Duemilanove, Diecimila, LilyPad, etc
 #endif					     // ATmega48, ATmega88, ATmega168, ATmega328
 
 //---------------------------------------------------------
@@ -243,22 +293,22 @@
 
 //-----------------
 #if defined(CORE_OC1A_PIN)
-#	define TIMER_PWM_PIN  CORE_OC1A_PIN  // Teensy
+#	define SEND_PIN  CORE_OC1A_PIN  // Teensy
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-#	define TIMER_PWM_PIN  11             // Arduino Mega
+#	define SEND_PIN  11             // Arduino Mega
 #elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
-#	define TIMER_PWM_PIN  13	     // MegaCore
+#	define SEND_PIN  13	     // MegaCore
 #elif defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__) \
 || defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) \
 || defined(__AVR_ATmega324P__) || defined(__AVR_ATmega324A__) \
 || defined(__AVR_ATmega324PA__) || defined(__AVR_ATmega164A__) \
 || defined(__AVR_ATmega164P__) || defined(__AVR_ATmega32__) \
 || defined(__AVR_ATmega16__) || defined(__AVR_ATmega8535__)
-#	define TIMER_PWM_PIN  13             // MightyCore
+#	define SEND_PIN  13             // MightyCore
 #elif defined(__AVR_ATtiny84__)
-# 	define TIMER_PWM_PIN  6
+# 	define SEND_PIN  6
 #else
-#	define TIMER_PWM_PIN  9              // Arduino Duemilanove, Diecimila, LilyPad, etc
+#	define SEND_PIN  9              // Arduino Duemilanove, Diecimila, LilyPad, etc
 #endif					     // ATmega48, ATmega88, ATmega168, ATmega328
 
 //---------------------------------------------------------
@@ -290,11 +340,11 @@
 
 //-----------------
 #if defined(CORE_OC3A_PIN)
-#	define TIMER_PWM_PIN  CORE_OC3A_PIN  // Teensy
+#	define SEND_PIN  CORE_OC3A_PIN  // Teensy
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-#	define TIMER_PWM_PIN  5              // Arduino Mega
+#	define SEND_PIN  5              // Arduino Mega
 #elif defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__)
-#	define TIMER_PWM_PIN  6              // MightyCore
+#	define SEND_PIN  6              // MightyCore
 #else
 #	error "Please add OC3A pin number here\n"
 #endif
@@ -338,9 +388,9 @@
 
 //-----------------
 #if defined(CORE_OC4A_PIN)
-#	define TIMER_PWM_PIN  CORE_OC4A_PIN  // Teensy
+#	define SEND_PIN  CORE_OC4A_PIN  // Teensy
 #elif defined(__AVR_ATmega32U4__)
-#	define TIMER_PWM_PIN  13             // Leonardo
+#	define SEND_PIN  13             // Leonardo
 #else
 #	error "Please add OC4A pin number here\n"
 #endif
@@ -374,9 +424,9 @@
 
 //-----------------
 #if defined(CORE_OC4A_PIN)
-#	define TIMER_PWM_PIN  CORE_OC4A_PIN
+#	define SEND_PIN  CORE_OC4A_PIN
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-#	define TIMER_PWM_PIN  6  // Arduino Mega
+#	define SEND_PIN  6  // Arduino Mega
 #else
 #	error "Please add OC4A pin number here\n"
 #endif
@@ -410,9 +460,9 @@
 
 //-----------------
 #if defined(CORE_OC5A_PIN)
-#	define TIMER_PWM_PIN  CORE_OC5A_PIN
+#	define SEND_PIN  CORE_OC5A_PIN
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-#	define TIMER_PWM_PIN  46  // Arduino Mega
+#	define SEND_PIN  46  // Arduino Mega
 #else
 #	error "Please add OC5A pin number here\n"
 #endif
@@ -479,7 +529,7 @@
 	CMT_MSC    = 0x03;            \
 })
 
-#define TIMER_PWM_PIN  5
+#define SEND_PIN  5
 
 // defines for TPM1 timer on Teensy-LC
 #elif defined(IR_USE_TIMER_TPM1)
@@ -509,7 +559,7 @@
 	FTM1_C0V = 0;                                \
 	FTM1_SC = FTM_SC_CLKS(1) | FTM_SC_PS(0) | FTM_SC_TOF | FTM_SC_TOIE; \
 })
-#define TIMER_PWM_PIN        16
+#define SEND_PIN        16
 
 // defines for timer_tiny0 (8 bits)
 #elif defined(IR_USE_TIMER_TINY0)
@@ -543,7 +593,7 @@
 })
 #endif
 
-#define TIMER_PWM_PIN        1  /* ATtiny85 */
+#define SEND_PIN        1  /* ATtiny85 */
 
 //---------------------------------------------------------
 // ESP32 (ESP8266 should likely be added here too)
@@ -560,12 +610,29 @@
 // way to do this on ESP32 is using the RMT built in driver like in this incomplete library below
 // https://github.com/ExploreEmbedded/ESP32_RMT
 #elif defined(IR_TIMER_USE_ESP32)
-#define TIMER_RESET	     
+
-#define TIMER_ENABLE_PWM     
+#define TIMER_RESET
-#define TIMER_DISABLE_PWM   Serial.println("IRsend not implemented for ESP32 yet");
+
-#define TIMER_ENABLE_INTR    
+#ifdef ISR
-#define TIMER_DISABLE_INTR   
+#	undef ISR
-#define TIMER_INTR_NAME      
+#endif
+#define  ISR(f)  void IRTimer()
+
+#elif defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)
+// use timer 3 hardcoded at this time
+
+#define TIMER_RESET
+#define TIMER_ENABLE_PWM     // Not presently used
+#define TIMER_DISABLE_PWM
+#define TIMER_ENABLE_INTR    NVIC_EnableIRQ(TC3_IRQn) // Not presently used
+#define TIMER_DISABLE_INTR   NVIC_DisableIRQ(TC3_IRQn)
+#define TIMER_INTR_NAME      TC3_Handler // Not presently used
+#define TIMER_CONFIG_KHZ(f)
+
+#ifdef ISR
+#	undef ISR
+#endif
+#define  ISR(f)  void irs()
 
 //---------------------------------------------------------
 // Unknown Timer
@@ -574,4 +641,13 @@
 #	error "Internal code configuration error, no known IR_USE_TIMER# defined\n"
 #endif
 
+// Provide default definitions, portable but possibly slower than necessary.
+#ifndef SENDPIN_ON
+#define SENDPIN_ON(pin)  digitalWrite(pin, HIGH)
+#endif
+
+#ifndef SENDPIN_OFF
+#define SENDPIN_OFF(pin) digitalWrite(pin, LOW)
+#endif
+
 #endif // ! boarddefs_h

src/sam.cpp

@@ -0,0 +1,101 @@
+// Support routines for SAM processor boards
+
+#include "IRremote.h"
+
+#if defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)
+
+// "Idiot check"
+#ifdef USE_DEFAULT_ENABLE_IR_IN
+#error Must undef USE_DEFAULT_ENABLE_IR_IN
+#endif
+
+//+=============================================================================
+// ATSAMD Timer setup & IRQ functions
+//
+
+// following based on setup from GitHub jdneo/timerInterrupt.ino
+
+static void setTimerFrequency(int frequencyHz)
+{
+	int compareValue = (SYSCLOCK / (TIMER_PRESCALER_DIV * frequencyHz)) - 1;
+	//Serial.println(compareValue);
+	TcCount16* TC = (TcCount16*) TC3;
+	// Make sure the count is in a proportional position to where it was
+	// to prevent any jitter or disconnect when changing the compare value.
+	TC->COUNT.reg = map(TC->COUNT.reg, 0, TC->CC[0].reg, 0, compareValue);
+	TC->CC[0].reg = compareValue;
+	//Serial.print("COUNT.reg ");
+	//Serial.println(TC->COUNT.reg);
+	//Serial.print("CC[0].reg ");
+	//Serial.println(TC->CC[0].reg);
+	while (TC->STATUS.bit.SYNCBUSY == 1);
+}
+
+static void startTimer()
+{
+	REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK0 | GCLK_CLKCTRL_ID_TCC2_TC3);
+	while (GCLK->STATUS.bit.SYNCBUSY == 1); // wait for sync
+
+	TcCount16* TC = (TcCount16*) TC3;
+
+	TC->CTRLA.reg &= ~TC_CTRLA_ENABLE;
+	while (TC->STATUS.bit.SYNCBUSY == 1); // wait for sync
+
+	// Use the 16-bit timer
+	TC->CTRLA.reg |= TC_CTRLA_MODE_COUNT16;
+	while (TC->STATUS.bit.SYNCBUSY == 1); // wait for sync
+
+	// Use match mode so that the timer counter resets when the count matches the compare register
+	TC->CTRLA.reg |= TC_CTRLA_WAVEGEN_MFRQ;
+	while (TC->STATUS.bit.SYNCBUSY == 1); // wait for sync
+
+	// Set prescaler to 1024
+	//TC->CTRLA.reg |= TC_CTRLA_PRESCALER_DIV1024;
+	TC->CTRLA.reg |= TC_CTRLA_PRESCALER_DIV64;
+	while (TC->STATUS.bit.SYNCBUSY == 1); // wait for sync
+
+	setTimerFrequency(1000000 / USECPERTICK);
+	
+	// Enable the compare interrupt
+	TC->INTENSET.reg = 0;
+	TC->INTENSET.bit.MC0 = 1;
+
+	NVIC_EnableIRQ(TC3_IRQn);
+
+	TC->CTRLA.reg |= TC_CTRLA_ENABLE;
+	while (TC->STATUS.bit.SYNCBUSY == 1); // wait for sync
+}
+
+//+=============================================================================
+// initialization
+//
+
+void IRrecv::enableIRIn()
+{
+	// Interrupt Service Routine - Fires every 50uS
+	//Serial.println("Starting timer");
+	startTimer();
+	//Serial.println("Started timer");
+
+	// Initialize state machine variables
+	irparams.rcvstate = STATE_IDLE;
+	irparams.rawlen = 0;
+
+	// Set pin modes
+	pinMode(irparams.recvpin, INPUT);
+}
+
+void irs(); // Defined in IRRemote as ISR(TIMER_INTR_NAME)
+
+void TC3_Handler(void)
+{
+	TcCount16* TC = (TcCount16*) TC3;
+	// If this interrupt is due to the compare register matching the timer count
+	// we toggle the LED.
+	if (TC->INTFLAG.bit.MC0 == 1) {
+		TC->INTFLAG.bit.MC0 = 1;
+		irs();
+	}
+}
+
+#endif // defined(ARDUINO_ARCH_SAM) || defined(ARDUINO_ARCH_SAMD)