[136] | 1 | /*
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| 2 | * IRremote
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| 3 | * Version 0.11 August, 2009
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| 4 | * Copyright 2009 Ken Shirriff
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| 5 | * For details, see http://arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
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| 6 | *
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| 7 | * Modified by Paul Stoffregen <paul@pjrc.com> to support other boards and timers
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| 8 | * Modified by Mitra Ardron <mitra@mitra.biz>
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| 9 | * Added Sanyo and Mitsubishi controllers
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| 10 | * Modified Sony to spot the repeat codes that some Sony's send
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| 11 | *
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| 12 | * Interrupt code based on NECIRrcv by Joe Knapp
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| 13 | * http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1210243556
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| 14 | * Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
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| 15 | *
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| 16 | * JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
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| 17 | */
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| 18 |
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| 19 | #include "IRremote.h"
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| 20 | #include "IRremoteInt.h"
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| 21 |
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| 22 | // Provides ISR
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| 23 | #include <avr/interrupt.h>
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| 24 |
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| 25 | volatile irparams_t irparams;
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| 26 |
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| 27 | // These versions of MATCH, MATCH_MARK, and MATCH_SPACE are only for debugging.
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| 28 | // To use them, set DEBUG in IRremoteInt.h
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| 29 | // Normally macros are used for efficiency
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| 30 | #ifdef DEBUG
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| 31 | int MATCH(int measured, int desired) {
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| 32 | Serial.print("Testing: ");
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| 33 | Serial.print(TICKS_LOW(desired), DEC);
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| 34 | Serial.print(" <= ");
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| 35 | Serial.print(measured, DEC);
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| 36 | Serial.print(" <= ");
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| 37 | Serial.println(TICKS_HIGH(desired), DEC);
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| 38 | return measured >= TICKS_LOW(desired) && measured <= TICKS_HIGH(desired);
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| 39 | }
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| 40 |
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| 41 | int MATCH_MARK(int measured_ticks, int desired_us) {
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| 42 | Serial.print("Testing mark ");
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| 43 | Serial.print(measured_ticks * USECPERTICK, DEC);
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| 44 | Serial.print(" vs ");
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| 45 | Serial.print(desired_us, DEC);
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| 46 | Serial.print(": ");
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| 47 | Serial.print(TICKS_LOW(desired_us + MARK_EXCESS), DEC);
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| 48 | Serial.print(" <= ");
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| 49 | Serial.print(measured_ticks, DEC);
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| 50 | Serial.print(" <= ");
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| 51 | Serial.println(TICKS_HIGH(desired_us + MARK_EXCESS), DEC);
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| 52 | return measured_ticks >= TICKS_LOW(desired_us + MARK_EXCESS) && measured_ticks <= TICKS_HIGH(desired_us + MARK_EXCESS);
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| 53 | }
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| 54 |
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| 55 | int MATCH_SPACE(int measured_ticks, int desired_us) {
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| 56 | Serial.print("Testing space ");
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| 57 | Serial.print(measured_ticks * USECPERTICK, DEC);
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| 58 | Serial.print(" vs ");
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| 59 | Serial.print(desired_us, DEC);
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| 60 | Serial.print(": ");
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| 61 | Serial.print(TICKS_LOW(desired_us - MARK_EXCESS), DEC);
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| 62 | Serial.print(" <= ");
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| 63 | Serial.print(measured_ticks, DEC);
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| 64 | Serial.print(" <= ");
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| 65 | Serial.println(TICKS_HIGH(desired_us - MARK_EXCESS), DEC);
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| 66 | return measured_ticks >= TICKS_LOW(desired_us - MARK_EXCESS) && measured_ticks <= TICKS_HIGH(desired_us - MARK_EXCESS);
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| 67 | }
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| 68 | #else
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| 69 | int MATCH(int measured, int desired) {return measured >= TICKS_LOW(desired) && measured <= TICKS_HIGH(desired);}
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| 70 | int MATCH_MARK(int measured_ticks, int desired_us) {return MATCH(measured_ticks, (desired_us + MARK_EXCESS));}
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| 71 | int MATCH_SPACE(int measured_ticks, int desired_us) {return MATCH(measured_ticks, (desired_us - MARK_EXCESS));}
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| 72 | #endif
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| 73 |
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| 74 | IRrecv::IRrecv(int recvpin)
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| 75 | {
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| 76 | irparams.recvpin = recvpin;
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| 77 | irparams.blinkflag = 0;
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| 78 | }
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| 79 |
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| 80 | // initialization
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| 81 | void IRrecv::enableIRIn() {
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| 82 | cli();
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| 83 | // setup pulse clock timer interrupt
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| 84 | //Prescale /8 (16M/8 = 0.5 microseconds per tick)
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| 85 | // Therefore, the timer interval can range from 0.5 to 128 microseconds
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| 86 | // depending on the reset value (255 to 0)
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| 87 | TIMER_CONFIG_NORMAL();
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| 88 |
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| 89 | //Timer2 Overflow Interrupt Enable
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| 90 | TIMER_ENABLE_INTR;
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| 91 |
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| 92 | TIMER_RESET;
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| 93 |
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| 94 | sei(); // enable interrupts
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| 95 |
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| 96 | // initialize state machine variables
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| 97 | irparams.rcvstate = STATE_IDLE;
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| 98 | irparams.rawlen = 0;
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| 99 |
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| 100 | // set pin modes
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| 101 | pinMode(irparams.recvpin, INPUT);
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| 102 | }
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| 103 |
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| 104 | // enable/disable blinking of pin 13 on IR processing
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| 105 | void IRrecv::blink13(int blinkflag)
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| 106 | {
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| 107 | irparams.blinkflag = blinkflag;
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| 108 | if (blinkflag)
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| 109 | pinMode(BLINKLED, OUTPUT);
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| 110 | }
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| 111 |
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| 112 | // TIMER2 interrupt code to collect raw data.
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| 113 | // Widths of alternating SPACE, MARK are recorded in rawbuf.
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| 114 | // Recorded in ticks of 50 microseconds.
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| 115 | // rawlen counts the number of entries recorded so far.
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| 116 | // First entry is the SPACE between transmissions.
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| 117 | // As soon as a SPACE gets long, ready is set, state switches to IDLE, timing of SPACE continues.
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| 118 | // As soon as first MARK arrives, gap width is recorded, ready is cleared, and new logging starts
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| 119 | ISR(TIMER_INTR_NAME)
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| 120 | {
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| 121 | TIMER_RESET;
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| 122 |
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| 123 | uint8_t irdata = (uint8_t)digitalRead(irparams.recvpin);
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| 124 |
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| 125 | irparams.timer++; // One more 50us tick
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| 126 | if (irparams.rawlen >= RAWBUF) {
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| 127 | // Buffer overflow
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| 128 | irparams.rcvstate = STATE_STOP;
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| 129 | }
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| 130 | switch(irparams.rcvstate) {
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| 131 | case STATE_IDLE: // In the middle of a gap
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| 132 | if (irdata == MARK) {
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| 133 | if (irparams.timer < GAP_TICKS) {
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| 134 | // Not big enough to be a gap.
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| 135 | irparams.timer = 0;
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| 136 | }
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| 137 | else {
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| 138 | // gap just ended, record duration and start recording transmission
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| 139 | irparams.rawlen = 0;
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| 140 | irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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| 141 | irparams.timer = 0;
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| 142 | irparams.rcvstate = STATE_MARK;
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| 143 | }
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| 144 | }
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| 145 | break;
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| 146 | case STATE_MARK: // timing MARK
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| 147 | if (irdata == SPACE) { // MARK ended, record time
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| 148 | irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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| 149 | irparams.timer = 0;
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| 150 | irparams.rcvstate = STATE_SPACE;
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| 151 | }
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| 152 | break;
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| 153 | case STATE_SPACE: // timing SPACE
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| 154 | if (irdata == MARK) { // SPACE just ended, record it
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| 155 | irparams.rawbuf[irparams.rawlen++] = irparams.timer;
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| 156 | irparams.timer = 0;
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| 157 | irparams.rcvstate = STATE_MARK;
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| 158 | }
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| 159 | else { // SPACE
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| 160 | if (irparams.timer > GAP_TICKS) {
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| 161 | // big SPACE, indicates gap between codes
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| 162 | // Mark current code as ready for processing
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| 163 | // Switch to STOP
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| 164 | // Don't reset timer; keep counting space width
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| 165 | irparams.rcvstate = STATE_STOP;
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| 166 | }
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| 167 | }
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| 168 | break;
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| 169 | case STATE_STOP: // waiting, measuring gap
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| 170 | if (irdata == MARK) { // reset gap timer
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| 171 | irparams.timer = 0;
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| 172 | }
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| 173 | break;
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| 174 | }
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| 175 |
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| 176 | if (irparams.blinkflag) {
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| 177 | if (irdata == MARK) {
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| 178 | BLINKLED_ON(); // turn pin 13 LED on
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| 179 | }
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| 180 | else {
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| 181 | BLINKLED_OFF(); // turn pin 13 LED off
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| 182 | }
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| 183 | }
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| 184 | }
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| 185 |
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| 186 | void IRrecv::resume() {
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| 187 | irparams.rcvstate = STATE_IDLE;
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| 188 | irparams.rawlen = 0;
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| 189 | }
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| 190 |
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| 191 |
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| 192 |
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| 193 | // Decodes the received IR message
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| 194 | // Returns 0 if no data ready, 1 if data ready.
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| 195 | // Results of decoding are stored in results
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| 196 | int IRrecv::decode(decode_results *results) {
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| 197 | results->rawbuf = irparams.rawbuf;
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| 198 | results->rawlen = irparams.rawlen;
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| 199 | if (irparams.rcvstate != STATE_STOP) {
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| 200 | return ERR;
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| 201 | }
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| 202 |
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| 203 | #ifdef DEBUG
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| 204 | Serial.println("Attempting NEC decode");
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| 205 | #endif
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| 206 | if (decodeNEC(results)) {
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| 207 | return DECODED;
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| 208 | }
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| 209 | /*
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| 210 | #ifdef DEBUG
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| 211 | Serial.println("Attempting Sony decode");
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| 212 | #endif
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| 213 | if (decodeSony(results)) {
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| 214 | return DECODED;
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| 215 | }*/
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| 216 | /*
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| 217 | #ifdef DEBUG
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| 218 | Serial.println("Attempting Sanyo decode");
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| 219 | #endif
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| 220 | if (decodeSanyo(results)) {
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| 221 | return DECODED;
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| 222 | }
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| 223 | */
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| 224 | /*
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| 225 | #ifdef DEBUG
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| 226 | Serial.println("Attempting Mitsubishi decode");
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| 227 | #endif
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| 228 | if (decodeMitsubishi(results)) {
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| 229 | return DECODED;
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| 230 | }*/
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| 231 | /*
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| 232 | #ifdef DEBUG
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| 233 | Serial.println("Attempting RC5 decode");
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| 234 | #endif
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| 235 | if (decodeRC5(results)) {
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| 236 | return DECODED;
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| 237 | }
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| 238 | */
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| 239 | /*
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| 240 | #ifdef DEBUG
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| 241 | Serial.println("Attempting RC6 decode");
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| 242 | #endif
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| 243 | if (decodeRC6(results)) {
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| 244 | return DECODED;
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| 245 | }
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| 246 | */
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| 247 | /*
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| 248 | #ifdef DEBUG
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| 249 | Serial.println("Attempting Panasonic decode");
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| 250 | #endif
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| 251 | if (decodePanasonic(results)) {
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| 252 | return DECODED;
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| 253 | }
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| 254 | */
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| 255 | /*
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| 256 | #ifdef DEBUG
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| 257 | Serial.println("Attempting JVC decode");
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| 258 | #endif
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| 259 | if (decodeJVC(results)) {
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| 260 | return DECODED;
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| 261 | }*/
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| 262 | // decodeHash returns a hash on any input.
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| 263 | // Thus, it needs to be last in the list.
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| 264 | // If you add any decodes, add them before this.
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| 265 | if (decodeHash(results)) {
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| 266 | return DECODED;
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| 267 | }
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| 268 | // Throw away and start over
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| 269 | resume();
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| 270 | return ERR;
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| 271 | }
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| 272 |
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| 273 |
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| 274 | // NECs have a repeat only 4 items long
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| 275 | long IRrecv::decodeNEC(decode_results *results) {
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| 276 | long data = 0;
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| 277 | int offset = 1; // Skip first space
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| 278 | // Initial mark
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| 279 | if (!MATCH_MARK(results->rawbuf[offset], NEC_HDR_MARK)) {
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| 280 | return ERR;
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| 281 | }
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| 282 | offset++;
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| 283 | // Check for repeat
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| 284 | if (irparams.rawlen == 4 &&
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| 285 | MATCH_SPACE(results->rawbuf[offset], NEC_RPT_SPACE) &&
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| 286 | MATCH_MARK(results->rawbuf[offset+1], NEC_BIT_MARK)) {
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| 287 | results->bits = 0;
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| 288 | results->value = REPEAT;
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| 289 | results->decode_type = NEC;
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| 290 | return DECODED;
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| 291 | }
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| 292 | if (irparams.rawlen < 2 * NEC_BITS + 4) {
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| 293 | return ERR;
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| 294 | }
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| 295 | // Initial space
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| 296 | if (!MATCH_SPACE(results->rawbuf[offset], NEC_HDR_SPACE)) {
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| 297 | return ERR;
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| 298 | }
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| 299 | offset++;
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| 300 | for (int i = 0; i < NEC_BITS; i++) {
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| 301 | if (!MATCH_MARK(results->rawbuf[offset], NEC_BIT_MARK)) {
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| 302 | return ERR;
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| 303 | }
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| 304 | offset++;
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| 305 | if (MATCH_SPACE(results->rawbuf[offset], NEC_ONE_SPACE)) {
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| 306 | data = (data << 1) | 1;
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| 307 | }
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| 308 | else if (MATCH_SPACE(results->rawbuf[offset], NEC_ZERO_SPACE)) {
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| 309 | data <<= 1;
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| 310 | }
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| 311 | else {
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| 312 | return ERR;
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| 313 | }
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| 314 | offset++;
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| 315 | }
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| 316 | // Success
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| 317 | results->bits = NEC_BITS;
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| 318 | results->value = data;
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| 319 | results->decode_type = NEC;
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| 320 | return DECODED;
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| 321 | }
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| 322 | /*
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| 323 | long IRrecv::decodeSony(decode_results *results) {
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| 324 | long data = 0;
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| 325 | if (irparams.rawlen < 2 * SONY_BITS + 2) {
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| 326 | return ERR;
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| 327 | }
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| 328 | int offset = 0; // Dont skip first space, check its size
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| 329 |
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| 330 | // Some Sony's deliver repeats fast after first
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| 331 | // unfortunately can't spot difference from of repeat from two fast clicks
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| 332 | if (results->rawbuf[offset] < SONY_DOUBLE_SPACE_USECS) {
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| 333 | // Serial.print("IR Gap found: ");
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| 334 | results->bits = 0;
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| 335 | results->value = REPEAT;
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| 336 | results->decode_type = SANYO;
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| 337 | return DECODED;
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| 338 | }
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| 339 | offset++;
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| 340 |
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| 341 | // Initial mark
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| 342 | if (!MATCH_MARK(results->rawbuf[offset], SONY_HDR_MARK)) {
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| 343 | return ERR;
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| 344 | }
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| 345 | offset++;
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| 346 |
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| 347 | while (offset + 1 < irparams.rawlen) {
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| 348 | if (!MATCH_SPACE(results->rawbuf[offset], SONY_HDR_SPACE)) {
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| 349 | break;
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| 350 | }
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| 351 | offset++;
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| 352 | if (MATCH_MARK(results->rawbuf[offset], SONY_ONE_MARK)) {
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| 353 | data = (data << 1) | 1;
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| 354 | }
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| 355 | else if (MATCH_MARK(results->rawbuf[offset], SONY_ZERO_MARK)) {
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| 356 | data <<= 1;
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| 357 | }
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| 358 | else {
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| 359 | return ERR;
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| 360 | }
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| 361 | offset++;
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| 362 | }
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| 363 |
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| 364 | // Success
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| 365 | results->bits = (offset - 1) / 2;
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| 366 | if (results->bits < 12) {
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| 367 | results->bits = 0;
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| 368 | return ERR;
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| 369 | }
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| 370 | results->value = data;
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| 371 | results->decode_type = SONY;
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| 372 | return DECODED;
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| 373 | }*/
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| 374 |
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| 375 | /*
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| 376 | // I think this is a Sanyo decoder - serial = SA 8650B
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| 377 | // Looks like Sony except for timings, 48 chars of data and time/space different
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| 378 | long IRrecv::decodeSanyo(decode_results *results) {
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| 379 | long data = 0;
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| 380 | if (irparams.rawlen < 2 * SANYO_BITS + 2) {
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| 381 | return ERR;
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| 382 | }
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| 383 | int offset = 0; // Skip first space
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| 384 | // Initial space
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| 385 | // Put this back in for debugging - note can't use #DEBUG as if Debug on we don't see the repeat cos of the delay
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| 386 | //Serial.print("IR Gap: ");
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| 387 | //Serial.println( results->rawbuf[offset]);
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| 388 | //Serial.println( "test against:");
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| 389 | //Serial.println(results->rawbuf[offset]);
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| 390 |
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| 391 | if (results->rawbuf[offset] < SANYO_DOUBLE_SPACE_USECS) {
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| 392 | // Serial.print("IR Gap found: ");
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| 393 | results->bits = 0;
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| 394 | results->value = REPEAT;
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| 395 | results->decode_type = SANYO;
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| 396 | return DECODED;
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| 397 | }
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| 398 | offset++;
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| 399 |
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| 400 | // Initial mark
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| 401 | if (!MATCH_MARK(results->rawbuf[offset], SANYO_HDR_MARK)) {
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| 402 | return ERR;
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| 403 | }
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| 404 | offset++;
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| 405 |
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| 406 | // Skip Second Mark
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| 407 | if (!MATCH_MARK(results->rawbuf[offset], SANYO_HDR_MARK)) {
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| 408 | return ERR;
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| 409 | }
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| 410 | offset++;
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| 411 |
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| 412 | while (offset + 1 < irparams.rawlen) {
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| 413 | if (!MATCH_SPACE(results->rawbuf[offset], SANYO_HDR_SPACE)) {
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| 414 | break;
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| 415 | }
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| 416 | offset++;
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| 417 | if (MATCH_MARK(results->rawbuf[offset], SANYO_ONE_MARK)) {
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| 418 | data = (data << 1) | 1;
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| 419 | }
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| 420 | else if (MATCH_MARK(results->rawbuf[offset], SANYO_ZERO_MARK)) {
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| 421 | data <<= 1;
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| 422 | }
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| 423 | else {
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| 424 | return ERR;
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| 425 | }
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| 426 | offset++;
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| 427 | }
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| 428 |
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| 429 | // Success
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| 430 | results->bits = (offset - 1) / 2;
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| 431 | if (results->bits < 12) {
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| 432 | results->bits = 0;
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| 433 | return ERR;
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| 434 | }
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| 435 | results->value = data;
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| 436 | results->decode_type = SANYO;
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| 437 | return DECODED;
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| 438 | }
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| 439 | */
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| 440 | /*
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| 441 | // Looks like Sony except for timings, 48 chars of data and time/space different
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| 442 | long IRrecv::decodeMitsubishi(decode_results *results) {
|
---|
| 443 | // Serial.print("?!? decoding Mitsubishi:");Serial.print(irparams.rawlen); Serial.print(" want "); Serial.println( 2 * MITSUBISHI_BITS + 2);
|
---|
| 444 | long data = 0;
|
---|
| 445 | if (irparams.rawlen < 2 * MITSUBISHI_BITS + 2) {
|
---|
| 446 | return ERR;
|
---|
| 447 | }
|
---|
| 448 | int offset = 0; // Skip first space
|
---|
| 449 | // Initial space
|
---|
| 450 | // Put this back in for debugging - note can't use #DEBUG as if Debug on we don't see the repeat cos of the delay
|
---|
| 451 | //Serial.print("IR Gap: ");
|
---|
| 452 | //Serial.println( results->rawbuf[offset]);
|
---|
| 453 | //Serial.println( "test against:");
|
---|
| 454 | //Serial.println(results->rawbuf[offset]);
|
---|
| 455 |
|
---|
| 456 | // Not seeing double keys from Mitsubishi
|
---|
| 457 | //if (results->rawbuf[offset] < MITSUBISHI_DOUBLE_SPACE_USECS) {
|
---|
| 458 | // Serial.print("IR Gap found: ");
|
---|
| 459 | // results->bits = 0;
|
---|
| 460 | // results->value = REPEAT;
|
---|
| 461 | // results->decode_type = MITSUBISHI;
|
---|
| 462 | // return DECODED;
|
---|
| 463 | //}
|
---|
| 464 |
|
---|
| 465 | offset++;
|
---|
| 466 |
|
---|
| 467 | // Typical
|
---|
| 468 | // 14200 7 41 7 42 7 42 7 17 7 17 7 18 7 41 7 18 7 17 7 17 7 18 7 41 8 17 7 17 7 18 7 17 7
|
---|
| 469 |
|
---|
| 470 | // Initial Space
|
---|
| 471 | if (!MATCH_MARK(results->rawbuf[offset], MITSUBISHI_HDR_SPACE)) {
|
---|
| 472 | return ERR;
|
---|
| 473 | }
|
---|
| 474 | offset++;
|
---|
| 475 | while (offset + 1 < irparams.rawlen) {
|
---|
| 476 | if (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ONE_MARK)) {
|
---|
| 477 | data = (data << 1) | 1;
|
---|
| 478 | }
|
---|
| 479 | else if (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ZERO_MARK)) {
|
---|
| 480 | data <<= 1;
|
---|
| 481 | }
|
---|
| 482 | else {
|
---|
| 483 | // Serial.println("A"); Serial.println(offset); Serial.println(results->rawbuf[offset]);
|
---|
| 484 | return ERR;
|
---|
| 485 | }
|
---|
| 486 | offset++;
|
---|
| 487 | if (!MATCH_SPACE(results->rawbuf[offset], MITSUBISHI_HDR_SPACE)) {
|
---|
| 488 | // Serial.println("B"); Serial.println(offset); Serial.println(results->rawbuf[offset]);
|
---|
| 489 | break;
|
---|
| 490 | }
|
---|
| 491 | offset++;
|
---|
| 492 | }
|
---|
| 493 |
|
---|
| 494 | // Success
|
---|
| 495 | results->bits = (offset - 1) / 2;
|
---|
| 496 | if (results->bits < MITSUBISHI_BITS) {
|
---|
| 497 | results->bits = 0;
|
---|
| 498 | return ERR;
|
---|
| 499 | }
|
---|
| 500 | results->value = data;
|
---|
| 501 | results->decode_type = MITSUBISHI;
|
---|
| 502 | return DECODED;
|
---|
| 503 | }*/
|
---|
| 504 |
|
---|
| 505 |
|
---|
| 506 | // Gets one undecoded level at a time from the raw buffer.
|
---|
| 507 | // The RC5/6 decoding is easier if the data is broken into time intervals.
|
---|
| 508 | // E.g. if the buffer has MARK for 2 time intervals and SPACE for 1,
|
---|
| 509 | // successive calls to getRClevel will return MARK, MARK, SPACE.
|
---|
| 510 | // offset and used are updated to keep track of the current position.
|
---|
| 511 | // t1 is the time interval for a single bit in microseconds.
|
---|
| 512 | // Returns -1 for error (measured time interval is not a multiple of t1).
|
---|
| 513 | int IRrecv::getRClevel(decode_results *results, int *offset, int *used, int t1) {
|
---|
| 514 | if (*offset >= results->rawlen) {
|
---|
| 515 | // After end of recorded buffer, assume SPACE.
|
---|
| 516 | return SPACE;
|
---|
| 517 | }
|
---|
| 518 | int width = results->rawbuf[*offset];
|
---|
| 519 | int val = ((*offset) % 2) ? MARK : SPACE;
|
---|
| 520 | int correction = (val == MARK) ? MARK_EXCESS : - MARK_EXCESS;
|
---|
| 521 |
|
---|
| 522 | int avail;
|
---|
| 523 | if (MATCH(width, t1 + correction)) {
|
---|
| 524 | avail = 1;
|
---|
| 525 | }
|
---|
| 526 | else if (MATCH(width, 2*t1 + correction)) {
|
---|
| 527 | avail = 2;
|
---|
| 528 | }
|
---|
| 529 | else if (MATCH(width, 3*t1 + correction)) {
|
---|
| 530 | avail = 3;
|
---|
| 531 | }
|
---|
| 532 | else {
|
---|
| 533 | return -1;
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | (*used)++;
|
---|
| 537 | if (*used >= avail) {
|
---|
| 538 | *used = 0;
|
---|
| 539 | (*offset)++;
|
---|
| 540 | }
|
---|
| 541 | #ifdef DEBUG
|
---|
| 542 | if (val == MARK) {
|
---|
| 543 | Serial.println("MARK");
|
---|
| 544 | }
|
---|
| 545 | else {
|
---|
| 546 | Serial.println("SPACE");
|
---|
| 547 | }
|
---|
| 548 | #endif
|
---|
| 549 | return val;
|
---|
| 550 | }
|
---|
| 551 | /*
|
---|
| 552 | long IRrecv::decodeRC5(decode_results *results) {
|
---|
| 553 | if (irparams.rawlen < MIN_RC5_SAMPLES + 2) {
|
---|
| 554 | return ERR;
|
---|
| 555 | }
|
---|
| 556 | int offset = 1; // Skip gap space
|
---|
| 557 | long data = 0;
|
---|
| 558 | int used = 0;
|
---|
| 559 | // Get start bits
|
---|
| 560 | if (getRClevel(results, &offset, &used, RC5_T1) != MARK) return ERR;
|
---|
| 561 | if (getRClevel(results, &offset, &used, RC5_T1) != SPACE) return ERR;
|
---|
| 562 | if (getRClevel(results, &offset, &used, RC5_T1) != MARK) return ERR;
|
---|
| 563 | int nbits;
|
---|
| 564 | for (nbits = 0; offset < irparams.rawlen; nbits++) {
|
---|
| 565 | int levelA = getRClevel(results, &offset, &used, RC5_T1);
|
---|
| 566 | int levelB = getRClevel(results, &offset, &used, RC5_T1);
|
---|
| 567 | if (levelA == SPACE && levelB == MARK) {
|
---|
| 568 | // 1 bit
|
---|
| 569 | data = (data << 1) | 1;
|
---|
| 570 | }
|
---|
| 571 | else if (levelA == MARK && levelB == SPACE) {
|
---|
| 572 | // zero bit
|
---|
| 573 | data <<= 1;
|
---|
| 574 | }
|
---|
| 575 | else {
|
---|
| 576 | return ERR;
|
---|
| 577 | }
|
---|
| 578 | }
|
---|
| 579 |
|
---|
| 580 | // Success
|
---|
| 581 | results->bits = nbits;
|
---|
| 582 | results->value = data;
|
---|
| 583 | results->decode_type = RC5;
|
---|
| 584 | return DECODED;
|
---|
| 585 | }*/
|
---|
| 586 | /*
|
---|
| 587 | long IRrecv::decodeRC6(decode_results *results) {
|
---|
| 588 | if (results->rawlen < MIN_RC6_SAMPLES) {
|
---|
| 589 | return ERR;
|
---|
| 590 | }
|
---|
| 591 | int offset = 1; // Skip first space
|
---|
| 592 | // Initial mark
|
---|
| 593 | if (!MATCH_MARK(results->rawbuf[offset], RC6_HDR_MARK)) {
|
---|
| 594 | return ERR;
|
---|
| 595 | }
|
---|
| 596 | offset++;
|
---|
| 597 | if (!MATCH_SPACE(results->rawbuf[offset], RC6_HDR_SPACE)) {
|
---|
| 598 | return ERR;
|
---|
| 599 | }
|
---|
| 600 | offset++;
|
---|
| 601 | long data = 0;
|
---|
| 602 | int used = 0;
|
---|
| 603 | // Get start bit (1)
|
---|
| 604 | if (getRClevel(results, &offset, &used, RC6_T1) != MARK) return ERR;
|
---|
| 605 | if (getRClevel(results, &offset, &used, RC6_T1) != SPACE) return ERR;
|
---|
| 606 | int nbits;
|
---|
| 607 | for (nbits = 0; offset < results->rawlen; nbits++) {
|
---|
| 608 | int levelA, levelB; // Next two levels
|
---|
| 609 | levelA = getRClevel(results, &offset, &used, RC6_T1);
|
---|
| 610 | if (nbits == 3) {
|
---|
| 611 | // T bit is double wide; make sure second half matches
|
---|
| 612 | if (levelA != getRClevel(results, &offset, &used, RC6_T1)) return ERR;
|
---|
| 613 | }
|
---|
| 614 | levelB = getRClevel(results, &offset, &used, RC6_T1);
|
---|
| 615 | if (nbits == 3) {
|
---|
| 616 | // T bit is double wide; make sure second half matches
|
---|
| 617 | if (levelB != getRClevel(results, &offset, &used, RC6_T1)) return ERR;
|
---|
| 618 | }
|
---|
| 619 | if (levelA == MARK && levelB == SPACE) { // reversed compared to RC5
|
---|
| 620 | // 1 bit
|
---|
| 621 | data = (data << 1) | 1;
|
---|
| 622 | }
|
---|
| 623 | else if (levelA == SPACE && levelB == MARK) {
|
---|
| 624 | // zero bit
|
---|
| 625 | data <<= 1;
|
---|
| 626 | }
|
---|
| 627 | else {
|
---|
| 628 | return ERR; // Error
|
---|
| 629 | }
|
---|
| 630 | }
|
---|
| 631 | // Success
|
---|
| 632 | results->bits = nbits;
|
---|
| 633 | results->value = data;
|
---|
| 634 | results->decode_type = RC6;
|
---|
| 635 | return DECODED;
|
---|
| 636 | }*/
|
---|
| 637 | /*
|
---|
| 638 | long IRrecv::decodePanasonic(decode_results *results) {
|
---|
| 639 | unsigned long long data = 0;
|
---|
| 640 | int offset = 1;
|
---|
| 641 |
|
---|
| 642 | if (!MATCH_MARK(results->rawbuf[offset], PANASONIC_HDR_MARK)) {
|
---|
| 643 | return ERR;
|
---|
| 644 | }
|
---|
| 645 | offset++;
|
---|
| 646 | if (!MATCH_MARK(results->rawbuf[offset], PANASONIC_HDR_SPACE)) {
|
---|
| 647 | return ERR;
|
---|
| 648 | }
|
---|
| 649 | offset++;
|
---|
| 650 |
|
---|
| 651 | // decode address
|
---|
| 652 | for (int i = 0; i < PANASONIC_BITS; i++) {
|
---|
| 653 | if (!MATCH_MARK(results->rawbuf[offset++], PANASONIC_BIT_MARK)) {
|
---|
| 654 | return ERR;
|
---|
| 655 | }
|
---|
| 656 | if (MATCH_SPACE(results->rawbuf[offset],PANASONIC_ONE_SPACE)) {
|
---|
| 657 | data = (data << 1) | 1;
|
---|
| 658 | } else if (MATCH_SPACE(results->rawbuf[offset],PANASONIC_ZERO_SPACE)) {
|
---|
| 659 | data <<= 1;
|
---|
| 660 | } else {
|
---|
| 661 | return ERR;
|
---|
| 662 | }
|
---|
| 663 | offset++;
|
---|
| 664 | }
|
---|
| 665 | results->value = (unsigned long)data;
|
---|
| 666 | results->panasonicAddress = (unsigned int)(data >> 32);
|
---|
| 667 | results->decode_type = PANASONIC;
|
---|
| 668 | results->bits = PANASONIC_BITS;
|
---|
| 669 | return DECODED;
|
---|
| 670 | }*/
|
---|
| 671 | /*
|
---|
| 672 | long IRrecv::decodeJVC(decode_results *results) {
|
---|
| 673 | long data = 0;
|
---|
| 674 | int offset = 1; // Skip first space
|
---|
| 675 | // Check for repeat
|
---|
| 676 | if (irparams.rawlen - 1 == 33 &&
|
---|
| 677 | MATCH_MARK(results->rawbuf[offset], JVC_BIT_MARK) &&
|
---|
| 678 | MATCH_MARK(results->rawbuf[irparams.rawlen-1], JVC_BIT_MARK)) {
|
---|
| 679 | results->bits = 0;
|
---|
| 680 | results->value = REPEAT;
|
---|
| 681 | results->decode_type = JVC;
|
---|
| 682 | return DECODED;
|
---|
| 683 | }
|
---|
| 684 | // Initial mark
|
---|
| 685 | if (!MATCH_MARK(results->rawbuf[offset], JVC_HDR_MARK)) {
|
---|
| 686 | return ERR;
|
---|
| 687 | }
|
---|
| 688 | offset++;
|
---|
| 689 | if (irparams.rawlen < 2 * JVC_BITS + 1 ) {
|
---|
| 690 | return ERR;
|
---|
| 691 | }
|
---|
| 692 | // Initial space
|
---|
| 693 | if (!MATCH_SPACE(results->rawbuf[offset], JVC_HDR_SPACE)) {
|
---|
| 694 | return ERR;
|
---|
| 695 | }
|
---|
| 696 | offset++;
|
---|
| 697 | for (int i = 0; i < JVC_BITS; i++) {
|
---|
| 698 | if (!MATCH_MARK(results->rawbuf[offset], JVC_BIT_MARK)) {
|
---|
| 699 | return ERR;
|
---|
| 700 | }
|
---|
| 701 | offset++;
|
---|
| 702 | if (MATCH_SPACE(results->rawbuf[offset], JVC_ONE_SPACE)) {
|
---|
| 703 | data = (data << 1) | 1;
|
---|
| 704 | }
|
---|
| 705 | else if (MATCH_SPACE(results->rawbuf[offset], JVC_ZERO_SPACE)) {
|
---|
| 706 | data <<= 1;
|
---|
| 707 | }
|
---|
| 708 | else {
|
---|
| 709 | return ERR;
|
---|
| 710 | }
|
---|
| 711 | offset++;
|
---|
| 712 | }
|
---|
| 713 | //Stop bit
|
---|
| 714 | if (!MATCH_MARK(results->rawbuf[offset], JVC_BIT_MARK)){
|
---|
| 715 | return ERR;
|
---|
| 716 | }
|
---|
| 717 | // Success
|
---|
| 718 | results->bits = JVC_BITS;
|
---|
| 719 | results->value = data;
|
---|
| 720 | results->decode_type = JVC;
|
---|
| 721 | return DECODED;
|
---|
| 722 | }*/
|
---|
| 723 |
|
---|
| 724 | /* -----------------------------------------------------------------------
|
---|
| 725 | * hashdecode - decode an arbitrary IR code.
|
---|
| 726 | * Instead of decoding using a standard encoding scheme
|
---|
| 727 | * (e.g. Sony, NEC, RC5), the code is hashed to a 32-bit value.
|
---|
| 728 | *
|
---|
| 729 | * The algorithm: look at the sequence of MARK signals, and see if each one
|
---|
| 730 | * is shorter (0), the same length (1), or longer (2) than the previous.
|
---|
| 731 | * Do the same with the SPACE signals. Hszh the resulting sequence of 0's,
|
---|
| 732 | * 1's, and 2's to a 32-bit value. This will give a unique value for each
|
---|
| 733 | * different code (probably), for most code systems.
|
---|
| 734 | *
|
---|
| 735 | * http://arcfn.com/2010/01/using-arbitrary-remotes-with-arduino.html
|
---|
| 736 | */
|
---|
| 737 |
|
---|
| 738 | // Compare two tick values, returning 0 if newval is shorter,
|
---|
| 739 | // 1 if newval is equal, and 2 if newval is longer
|
---|
| 740 | // Use a tolerance of 20%
|
---|
| 741 | int IRrecv::compare(unsigned int oldval, unsigned int newval) {
|
---|
| 742 | if (newval < oldval * .8) {
|
---|
| 743 | return 0;
|
---|
| 744 | }
|
---|
| 745 | else if (oldval < newval * .8) {
|
---|
| 746 | return 2;
|
---|
| 747 | }
|
---|
| 748 | else {
|
---|
| 749 | return 1;
|
---|
| 750 | }
|
---|
| 751 | }
|
---|
| 752 |
|
---|
| 753 | // Use FNV hash algorithm: http://isthe.com/chongo/tech/comp/fnv/#FNV-param
|
---|
| 754 | #define FNV_PRIME_32 16777619
|
---|
| 755 | #define FNV_BASIS_32 2166136261
|
---|
| 756 |
|
---|
| 757 | /* Converts the raw code values into a 32-bit hash code.
|
---|
| 758 | * Hopefully this code is unique for each button.
|
---|
| 759 | * This isn't a "real" decoding, just an arbitrary value.
|
---|
| 760 | */
|
---|
| 761 | long IRrecv::decodeHash(decode_results *results) {
|
---|
| 762 | // Require at least 6 samples to prevent triggering on noise
|
---|
| 763 | if (results->rawlen < 6) {
|
---|
| 764 | return ERR;
|
---|
| 765 | }
|
---|
| 766 | long hash = FNV_BASIS_32;
|
---|
| 767 | for (int i = 1; i+2 < results->rawlen; i++) {
|
---|
| 768 | int value = compare(results->rawbuf[i], results->rawbuf[i+2]);
|
---|
| 769 | // Add value into the hash
|
---|
| 770 | hash = (hash * FNV_PRIME_32) ^ value;
|
---|
| 771 | }
|
---|
| 772 | results->value = hash;
|
---|
| 773 | results->bits = 32;
|
---|
| 774 | results->decode_type = UNKNOWN;
|
---|
| 775 | return DECODED;
|
---|
| 776 | }
|
---|
| 777 |
|
---|