Arduino-IRremote · bengtmartensson · Apr 6, 2017 · Apr 7, 2017 · Apr 6, 2017 · Apr 7, 2017
diff --git a/IRremote.cpp b/IRremote.cpp
@@ -0,0 +1,200 @@
+//******************************************************************************
+// IRremote
+// Version 2.0.1 June, 2015
+// Copyright 2009 Ken Shirriff
+// For details, see http://arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
+//
+// Modified by Paul Stoffregen <paul@pjrc.com> to support other boards and timers
+// Modified  by Mitra Ardron <mitra@mitra.biz>
+// Added Sanyo and Mitsubishi controllers
+// Modified Sony to spot the repeat codes that some Sony's send
+//
+// Interrupt code based on NECIRrcv by Joe Knapp
+// http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1210243556
+// Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
+//
+// JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
+// LG added by Darryl Smith (based on the JVC protocol)
+// Whynter A/C ARC-110WD added by Francesco Meschia
+//******************************************************************************
+
+// Defining IR_GLOBAL here allows us to declare the instantiation of global variables
+#define IR_GLOBAL
+#	include "IRremote.h"
+#	include "IRremoteInt.h"
+#undef IR_GLOBAL
+
+#ifndef IR_TIMER_USE_ESP32
+#include <avr/interrupt.h>
+#endif
+
+
+//+=============================================================================
+// The match functions were (apparently) originally MACROs to improve code speed
+//   (although this would have bloated the code) hence the names being CAPS
+// A later release implemented debug output and so they needed to be converted
+//   to functions.
+// I tried to implement a dual-compile mode (DEBUG/non-DEBUG) but for some
+//   reason, no matter what I did I could not get them to function as macros again.
+// I have found a *lot* of bugs in the Arduino compiler over the last few weeks,
+//   and I am currently assuming that one of these bugs is my problem.
+// I may revisit this code at a later date and look at the assembler produced
+//   in a hope of finding out what is going on, but for now they will remain as
+//   functions even in non-DEBUG mode
+//
+int  MATCH (int measured,  int desired)
+{
+ 	DBG_PRINT(F("Testing: "));
+ 	DBG_PRINT(TICKS_LOW(desired), DEC);
+ 	DBG_PRINT(F(" <= "));
+ 	DBG_PRINT(measured, DEC);
+ 	DBG_PRINT(F(" <= "));
+ 	DBG_PRINT(TICKS_HIGH(desired), DEC);
+
+  bool passed = ((measured >= TICKS_LOW(desired)) && (measured <= TICKS_HIGH(desired)));
+  if (passed)
+    DBG_PRINTLN(F("?; passed"));
+  else
+    DBG_PRINTLN(F("?; FAILED")); 
+ 	return passed;
+}
+
+//+========================================================
+// Due to sensor lag, when received, Marks tend to be 100us too long
+//
+int  MATCH_MARK (int measured_ticks,  int desired_us)
+{
+	DBG_PRINT(F("Testing mark (actual vs desired): "));
+	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
+	DBG_PRINT(F("us vs "));
+	DBG_PRINT(desired_us, DEC);
+	DBG_PRINT("us"); 
+	DBG_PRINT(": ");
+	DBG_PRINT(TICKS_LOW(desired_us + MARK_EXCESS) * USECPERTICK, DEC);
+	DBG_PRINT(F(" <= "));
+	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
+	DBG_PRINT(F(" <= "));
+	DBG_PRINT(TICKS_HIGH(desired_us + MARK_EXCESS) * USECPERTICK, DEC);
+
+  bool passed = ((measured_ticks >= TICKS_LOW (desired_us + MARK_EXCESS))
+                && (measured_ticks <= TICKS_HIGH(desired_us + MARK_EXCESS)));
+  if (passed)
+    DBG_PRINTLN(F("?; passed"));
+  else
+    DBG_PRINTLN(F("?; FAILED")); 
+ 	return passed;
+}
+
+//+========================================================
+// Due to sensor lag, when received, Spaces tend to be 100us too short
+//
+int  MATCH_SPACE (int measured_ticks,  int desired_us)
+{
+	DBG_PRINT(F("Testing space (actual vs desired): "));
+	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
+	DBG_PRINT(F("us vs "));
+	DBG_PRINT(desired_us, DEC);
+	DBG_PRINT("us"); 
+	DBG_PRINT(": ");
+	DBG_PRINT(TICKS_LOW(desired_us - MARK_EXCESS) * USECPERTICK, DEC);
+	DBG_PRINT(F(" <= "));
+	DBG_PRINT(measured_ticks * USECPERTICK, DEC);
+	DBG_PRINT(F(" <= "));
+	DBG_PRINT(TICKS_HIGH(desired_us - MARK_EXCESS) * USECPERTICK, DEC);
+
+  bool passed = ((measured_ticks >= TICKS_LOW (desired_us - MARK_EXCESS))
+                && (measured_ticks <= TICKS_HIGH(desired_us - MARK_EXCESS)));
+  if (passed)
+    DBG_PRINTLN(F("?; passed"));
+  else
+    DBG_PRINTLN(F("?; FAILED")); 
+ 	return passed;
+}
+
+//+=============================================================================
+// Interrupt Service Routine - Fires every 50uS
+// TIMER2 interrupt code to collect raw data.
+// Widths of alternating SPACE, MARK are recorded in rawbuf.
+// Recorded in ticks of 50uS [microseconds, 0.000050 seconds]
+// 'rawlen' counts the number of entries recorded so far.
+// First entry is the SPACE between transmissions.
+// As soon as a the first [SPACE] entry gets long:
+//   Ready is set; State switches to IDLE; Timing of SPACE continues.
+// 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;
+
+	// Read if IR Receiver -> SPACE [xmt LED off] or a MARK [xmt LED on]
+	// digitalRead() is very slow. Optimisation is possible, but makes the code unportable
+	uint8_t  irdata = (uint8_t)digitalRead(irparams.recvpin);
+
+	irparams.timer++;  // One more 50uS tick
+	if (irparams.rawlen >= RAWBUF)  irparams.rcvstate = STATE_OVERFLOW ;  // Buffer overflow
+
+	switch(irparams.rcvstate) {
+		//......................................................................
+		case STATE_IDLE: // In the middle of a gap
+			if (irdata == MARK) {
+				if (irparams.timer < GAP_TICKS)  {  // Not big enough to be a gap.
+					irparams.timer = 0;
+
+				} else {
+					// Gap just ended; Record duration; Start recording transmission
+					irparams.overflow                  = false;
+					irparams.rawlen                    = 0;
+					irparams.rawbuf[irparams.rawlen++] = irparams.timer;
+					irparams.timer                     = 0;
+					irparams.rcvstate                  = STATE_MARK;
+				}
+			}
+			break;
+		//......................................................................
+		case STATE_MARK:  // Timing Mark
+			if (irdata == SPACE) {   // Mark ended; Record time
+				irparams.rawbuf[irparams.rawlen++] = irparams.timer;
+				irparams.timer                     = 0;
+				irparams.rcvstate                  = STATE_SPACE;
+			}
+			break;
+		//......................................................................
+		case STATE_SPACE:  // Timing Space
+			if (irdata == MARK) {  // Space just ended; Record time
+				irparams.rawbuf[irparams.rawlen++] = irparams.timer;
+				irparams.timer                     = 0;
+				irparams.rcvstate                  = STATE_MARK;
+
+			} else if (irparams.timer > GAP_TICKS) {  // Space
+					// A long Space, indicates gap between codes
+					// Flag the current code as ready for processing
+					// Switch to STOP
+					// Don't reset timer; keep counting Space width
+					irparams.rcvstate = STATE_STOP;
+			}
+			break;
+		//......................................................................
+		case STATE_STOP:  // Waiting; Measuring Gap
+		 	if (irdata == MARK)  irparams.timer = 0 ;  // Reset gap timer
+		 	break;
+		//......................................................................
+		case STATE_OVERFLOW:  // Flag up a read overflow; Stop the State Machine
+			irparams.overflow = true;
+			irparams.rcvstate = STATE_STOP;
+		 	break;
+	}
+
+	// If requested, flash LED while receiving IR data
+	if (irparams.blinkflag) {
+		if (irdata == MARK)
+			if (irparams.blinkpin) digitalWrite(irparams.blinkpin, HIGH); // Turn user defined pin LED on
+				else BLINKLED_ON() ;   // if no user defined LED pin, turn default LED pin for the hardware on
+		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
+	}
+}