//****************************************************************************** // 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 to support other boards and timers // Modified by Mitra Ardron // 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 #ifdef HAS_AVR_INTERRUPT_H #include #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 // ISR (TIMER_INTR_NAME) { 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; } #ifdef BLINKLED // 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 } #endif // BLINKLED }