422 lines
17 KiB
C++
422 lines
17 KiB
C++
/*
|
|
* ir_DistanceWidthProtocol.hpp
|
|
*
|
|
* Contains only the decoder functions for universal pulse width or pulse distance protocols!
|
|
* The send functions are used by almost all protocols and therefore in IRSend.hh.
|
|
*
|
|
* This decoder tries to decode a pulse distance or pulse distance width with constant period (or pulse width - not enabled yet) protocol.
|
|
* 1. Analyze all space and mark length
|
|
* 2. Decide which protocol we have
|
|
* 3. Try to decode with the mark and space data found in step 1
|
|
* 4. Assume one start bit / header and one stop bit, since pulse distance data must have a stop bit!
|
|
* No data and address decoding, only raw data as result.
|
|
*
|
|
* Pulse distance data can be sent with the generic function as in SendDemo example line 155:
|
|
* https://github.com/Arduino-IRremote/Arduino-IRremote/blob/d51b540cb2ddf1424888d2d9e6b62fe1ef46859d/examples/SendDemo/SendDemo.ino#L155
|
|
* void sendPulseDistanceWidthData(unsigned int aOneMarkMicros, unsigned int aOneSpaceMicros, unsigned int aZeroMarkMicros,
|
|
* unsigned int aZeroSpaceMicros, uint32_t aData, uint8_t aNumberOfBits, bool aMSBfirst, bool aSendStopBit = false)
|
|
* The header must be sent manually with:
|
|
* IrSender.mark(MarkMicros)
|
|
* IrSender.space(SpaceMicros);
|
|
*
|
|
* Or send it by filling a DecodedRawDataArray and with the sendPulseDistanceWidthFromArray() function as in SendDemo example line 175:
|
|
* https://github.com/Arduino-IRremote/Arduino-IRremote/blob/d51b540cb2ddf1424888d2d9e6b62fe1ef46859d/examples/SendDemo/SendDemo.ino#L175
|
|
* sendPulseDistanceWidthFromArray(uint_fast8_t aFrequencyKHz, unsigned int aHeaderMarkMicros,
|
|
* unsigned int aHeaderSpaceMicros, unsigned int aOneMarkMicros, unsigned int aOneSpaceMicros, unsigned int aZeroMarkMicros,
|
|
* unsigned int aZeroSpaceMicros, uint32_t *aDecodedRawDataArray, unsigned int aNumberOfBits, uint8_t aFlags,
|
|
* unsigned int aRepeatPeriodMillis, int_fast8_t aNumberOfRepeats)
|
|
*
|
|
* This file is part of Arduino-IRremote https://github.com/Arduino-IRremote/Arduino-IRremote.
|
|
*
|
|
************************************************************************************
|
|
* MIT License
|
|
*
|
|
* Copyright (c) 2022-2023 Armin Joachimsmeyer
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is furnished
|
|
* to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
|
|
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
|
|
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
|
|
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
************************************************************************************
|
|
*/
|
|
#ifndef _IR_DISTANCE_WIDTH_HPP
|
|
#define _IR_DISTANCE_WIDTH_HPP
|
|
|
|
#if !defined(DISTANCE_WIDTH_MAXIMUM_REPEAT_DISTANCE_MICROS)
|
|
#define DISTANCE_WIDTH_MAXIMUM_REPEAT_DISTANCE_MICROS 100000 // 100 ms, bit it is just a guess
|
|
#endif
|
|
|
|
#if defined(DEBUG) && !defined(LOCAL_DEBUG)
|
|
#define LOCAL_DEBUG
|
|
#else
|
|
//#define LOCAL_DEBUG // This enables debug output only for this file
|
|
#endif
|
|
|
|
// accept durations up to 50 * 50 (MICROS_PER_TICK) 2500 microseconds
|
|
#define DURATION_ARRAY_SIZE 50
|
|
|
|
// Switch the decoding according to your needs
|
|
//#define USE_MSB_DECODING_FOR_DISTANCE_DECODER // If active, it resembles LG, otherwise LSB first as most other protocols e.g. NEC and Kaseikyo/Panasonic
|
|
|
|
/** \addtogroup Decoder Decoders and encoders for different protocols
|
|
* @{
|
|
*/
|
|
//=====================================================================================
|
|
// DDD III SSS TTTTTT AA N N CCC EEEE W W III DDD TTTTTT H H
|
|
// D D I S TT A A NN N C E W W I D D TT H H
|
|
// D D I SSS TT AAAA N N N C EEE W W W I D D TT HHHH
|
|
// D D I S TT A A N NN C E W W W I D D TT H H
|
|
// DDD III SSSS TT A A N N CCC EEEE W W III DDD TT H H
|
|
//=====================================================================================
|
|
// see: https://www.mikrocontroller.net/articles/IRMP_-_english#Codings
|
|
#if defined(LOCAL_DEBUG)
|
|
void printDurations(uint8_t aArray[], uint8_t aMaxIndex) {
|
|
for (uint_fast8_t i = 0; i <= aMaxIndex; i++) {
|
|
//Print index at the beginning of a new line
|
|
if (i % 10 == 0) {
|
|
if (i == 0) {
|
|
Serial.print(' '); // indentation for the first index 0
|
|
} else {
|
|
Serial.println(); // new line for next indexes 10, 20 etc.
|
|
}
|
|
Serial.print(i);
|
|
Serial.print(F(": "));
|
|
}
|
|
// Print number of values in array and duration if != 0
|
|
Serial.print(aArray[i]);
|
|
if (aArray[i] != 0) {
|
|
Serial.print('x');
|
|
Serial.print(i * (uint16_t) MICROS_PER_TICK);
|
|
}
|
|
Serial.print(F(" | "));
|
|
}
|
|
Serial.println();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* @return false if more than 2 distinct duration values found
|
|
*/
|
|
bool aggregateArrayCounts(uint8_t aArray[], uint8_t aMaxIndex, uint8_t *aShortIndex, uint8_t *aLongIndex) {
|
|
uint8_t tSum = 0;
|
|
uint16_t tWeightedSum = 0;
|
|
for (uint_fast8_t i = 0; i <= aMaxIndex; i++) {
|
|
uint8_t tCurrentDurations = aArray[i];
|
|
if (tCurrentDurations != 0) {
|
|
// Add it to sum and remove array content
|
|
tSum += tCurrentDurations;
|
|
tWeightedSum += (tCurrentDurations * i);
|
|
aArray[i] = 0;
|
|
}
|
|
if ((tCurrentDurations == 0 || i == aMaxIndex) && tSum != 0) {
|
|
// here we have a sum and a gap after the values
|
|
uint8_t tAggregateIndex = (tWeightedSum + (tSum / 2)) / tSum; // with rounding
|
|
aArray[tAggregateIndex] = tSum; // disabling this line increases code size by 2 - unbelievable!
|
|
// store aggregate for later decoding
|
|
if (*aShortIndex == 0) {
|
|
*aShortIndex = tAggregateIndex;
|
|
} else if (*aLongIndex == 0) {
|
|
*aLongIndex = tAggregateIndex;
|
|
} else {
|
|
// we have 3 bins => this is likely no pulse width or distance protocol. e.g. it can be RC5.
|
|
return false;
|
|
}
|
|
// initialize for next aggregation
|
|
tSum = 0;
|
|
tWeightedSum = 0;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Try to decode a pulse distance or pulse width protocol.
|
|
* 1. Analyze all space and mark length
|
|
* 2. Decide if we have an pulse width or distance protocol
|
|
* 3. Try to decode with the mark and space data found in step 1
|
|
* No data and address decoding, only raw data as result.
|
|
*/
|
|
bool IRrecv::decodeDistanceWidth() {
|
|
uint8_t tDurationArray[DURATION_ARRAY_SIZE]; // For up to 49 ticks / 2450 us
|
|
|
|
/*
|
|
* Accept only protocols with at least 8 bits
|
|
*/
|
|
if (decodedIRData.rawlen < (2 * 8) + 4) {
|
|
IR_DEBUG_PRINT(F("PULSE_DISTANCE_WIDTH: "));
|
|
IR_DEBUG_PRINT(F("Data length="));
|
|
IR_DEBUG_PRINT(decodedIRData.rawlen);
|
|
IR_DEBUG_PRINTLN(F(" is less than 20"));
|
|
return false;
|
|
}
|
|
|
|
// Reset duration array
|
|
memset(tDurationArray, 0, DURATION_ARRAY_SIZE);
|
|
|
|
uint8_t tIndexOfMaxDuration = 0;
|
|
/*
|
|
* Count number of mark durations up to 49 ticks. Skip leading start and trailing stop bit.
|
|
*/
|
|
for (IRRawlenType i = 3; i < decodedIRData.rawlen - 2; i += 2) {
|
|
auto tDurationTicks = decodedIRData.rawDataPtr->rawbuf[i];
|
|
if (tDurationTicks < DURATION_ARRAY_SIZE) {
|
|
tDurationArray[tDurationTicks]++; // count duration if less than DURATION_ARRAY_SIZE (50)
|
|
if (tIndexOfMaxDuration < tDurationTicks) {
|
|
tIndexOfMaxDuration = tDurationTicks;
|
|
}
|
|
} else {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_DISTANCE_WIDTH: "));
|
|
Serial.print(F("Mark "));
|
|
Serial.print(tDurationTicks * MICROS_PER_TICK);
|
|
Serial.print(F(" is longer than maximum "));
|
|
Serial.print(DURATION_ARRAY_SIZE * MICROS_PER_TICK);
|
|
Serial.print(F(" us. Index="));
|
|
Serial.println(i);
|
|
#endif
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Aggregate mark counts to one duration bin
|
|
*/
|
|
uint8_t tMarkTicksShort = 0;
|
|
uint8_t tMarkTicksLong = 0;
|
|
bool tSuccess = aggregateArrayCounts(tDurationArray, tIndexOfMaxDuration, &tMarkTicksShort, &tMarkTicksLong);
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.println(F("Mark:"));
|
|
printDurations(tDurationArray, tIndexOfMaxDuration);
|
|
#endif
|
|
|
|
if (!tSuccess) {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_DISTANCE_WIDTH: "));
|
|
Serial.println(F("Mark aggregation failed, more than 2 distinct mark duration values found"));
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
// Reset duration array
|
|
memset(tDurationArray, 0, DURATION_ARRAY_SIZE);
|
|
|
|
/*
|
|
* Count number of space durations. Skip leading start and trailing stop bit.
|
|
*/
|
|
tIndexOfMaxDuration = 0;
|
|
for (IRRawlenType i = 4; i < decodedIRData.rawlen - 2; i += 2) {
|
|
auto tDurationTicks = decodedIRData.rawDataPtr->rawbuf[i];
|
|
if (tDurationTicks < DURATION_ARRAY_SIZE) {
|
|
tDurationArray[tDurationTicks]++;
|
|
if (tIndexOfMaxDuration < tDurationTicks) {
|
|
tIndexOfMaxDuration = tDurationTicks;
|
|
}
|
|
} else {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_DISTANCE_WIDTH: "));
|
|
Serial.print(F("Space "));
|
|
Serial.print(tDurationTicks * MICROS_PER_TICK);
|
|
Serial.print(F(" is longer than maximum "));
|
|
Serial.print(DURATION_ARRAY_SIZE * MICROS_PER_TICK);
|
|
Serial.print(F(" us. Index="));
|
|
Serial.println(i);
|
|
#endif
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Aggregate space counts to one duration bin
|
|
*/
|
|
uint8_t tSpaceTicksShort = 0;
|
|
uint8_t tSpaceTicksLong = 0;
|
|
tSuccess = aggregateArrayCounts(tDurationArray, tIndexOfMaxDuration, &tSpaceTicksShort, &tSpaceTicksLong);
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.println(F("Space:"));
|
|
printDurations(tDurationArray, tIndexOfMaxDuration);
|
|
#endif
|
|
|
|
if (!tSuccess) {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_DISTANCE_WIDTH: "));
|
|
Serial.println(F("Space aggregation failed, more than 2 distinct space duration values found"));
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Print characteristics of this protocol. Durations are in ticks.
|
|
* Number of bits, start bit, start pause, long mark, long space, short mark, short space
|
|
*
|
|
* NEC: 32, 180, 90, 0, 34, 11, 11
|
|
* Samsung32: 32, 90, 90, 0, 34, 11, 11
|
|
* LG: 28, 180, 84, 0, 32, 10, 11
|
|
* JVC: 16, 168, 84, 0, 32, 10, 10
|
|
* Kaseikyo: 48. 69, 35, 0, 26, 9, 9
|
|
* Sony: 12|15|20, 48, 12, 24, 0, 12, 12 // the only known pulse width protocol
|
|
*/
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("DistanceWidthTimingInfoStruct: "));
|
|
Serial.print(decodedIRData.rawDataPtr->rawbuf[1] * MICROS_PER_TICK);
|
|
Serial.print(F(", "));
|
|
Serial.print(decodedIRData.rawDataPtr->rawbuf[2] * MICROS_PER_TICK);
|
|
Serial.print(F(", "));
|
|
Serial.print(tMarkTicksLong * MICROS_PER_TICK);
|
|
Serial.print(F(", "));
|
|
Serial.print(tSpaceTicksLong * MICROS_PER_TICK);
|
|
Serial.print(F(", "));
|
|
Serial.print(tMarkTicksShort * MICROS_PER_TICK);
|
|
Serial.print(F(", "));
|
|
Serial.println(tSpaceTicksShort * MICROS_PER_TICK);
|
|
#endif
|
|
#if RAW_BUFFER_LENGTH <= 508
|
|
uint_fast8_t tNumberOfBits;
|
|
#else
|
|
uint16_t tNumberOfBits;
|
|
#endif
|
|
tNumberOfBits = (decodedIRData.rawlen / 2) - 1;
|
|
if (tSpaceTicksLong > 0 && tMarkTicksLong == 0) {
|
|
// For PULSE_DISTANCE a stop bit is mandatory, for PULSE_WIDTH it is not required!
|
|
tNumberOfBits--; // Correct for stop bit
|
|
}
|
|
decodedIRData.numberOfBits = tNumberOfBits;
|
|
uint8_t tNumberOfAdditionalArrayValues = (tNumberOfBits - 1) / BITS_IN_RAW_DATA_TYPE;
|
|
|
|
/*
|
|
* We can have the following protocol timings
|
|
* Pulse distance: Pulses/marks are constant, pause/spaces have different length, like NEC.
|
|
* Pulse width: Pulses/marks have different length, pause/spaces are constant, like Sony.
|
|
* Pulse distance width: Pulses/marks and pause/spaces have different length, often the bit length is constant, like MagiQuest.
|
|
* Pulse distance width can be decoded by pulse width decoder, if this decoder does not check the length of pause/spaces.
|
|
*/
|
|
|
|
if (tMarkTicksLong == 0 && tSpaceTicksLong == 0) {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_DISTANCE: "));
|
|
Serial.println(F("Only 1 distinct duration value for each space and mark found"));
|
|
#endif
|
|
return false;
|
|
}
|
|
unsigned int tSpaceMicrosShort;
|
|
#if defined DECODE_STRICT_CHECKS
|
|
if(tMarkTicksLong > 0 && tSpaceTicksLong > 0) {
|
|
// We have different mark and space length here, so signal decodePulseDistanceWidthData() not to check against constant length decodePulseDistanceWidthData
|
|
tSpaceMicrosShort = 0;
|
|
}
|
|
#endif
|
|
tSpaceMicrosShort = tSpaceTicksShort * MICROS_PER_TICK;
|
|
unsigned int tMarkMicrosShort = tMarkTicksShort * MICROS_PER_TICK;
|
|
unsigned int tMarkMicrosLong = tMarkTicksLong * MICROS_PER_TICK;
|
|
unsigned int tSpaceMicrosLong = tSpaceTicksLong * MICROS_PER_TICK;
|
|
IRRawlenType tStartIndex = 3; // skip leading start bit for decoding.
|
|
|
|
for (uint_fast8_t i = 0; i <= tNumberOfAdditionalArrayValues; ++i) {
|
|
uint8_t tNumberOfBitsForOneDecode = tNumberOfBits;
|
|
/*
|
|
* Decode in 32/64 bit chunks. Only the last chunk can contain less than 32/64 bits
|
|
*/
|
|
if (tNumberOfBitsForOneDecode > BITS_IN_RAW_DATA_TYPE) {
|
|
tNumberOfBitsForOneDecode = BITS_IN_RAW_DATA_TYPE;
|
|
}
|
|
bool tResult;
|
|
if (tMarkTicksLong > 0) {
|
|
/*
|
|
* Here short and long mark durations found.
|
|
*/
|
|
decodedIRData.protocol = PULSE_WIDTH;
|
|
tResult = decodePulseDistanceWidthData(tNumberOfBitsForOneDecode, tStartIndex, tMarkMicrosLong, tMarkMicrosShort,
|
|
tSpaceMicrosShort, 0,
|
|
#if defined(USE_MSB_DECODING_FOR_DISTANCE_DECODER)
|
|
true
|
|
#else
|
|
false
|
|
#endif
|
|
);
|
|
} else {
|
|
/*
|
|
* Here short and long space durations found.
|
|
*/
|
|
decodedIRData.protocol = PULSE_DISTANCE;
|
|
tResult = decodePulseDistanceWidthData(tNumberOfBitsForOneDecode, tStartIndex, tMarkMicrosShort, tMarkMicrosShort,
|
|
tSpaceMicrosLong, tSpaceMicrosShort,
|
|
#if defined(USE_MSB_DECODING_FOR_DISTANCE_DECODER)
|
|
true
|
|
#else
|
|
false
|
|
#endif
|
|
);
|
|
}
|
|
if (!tResult) {
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_WIDTH: "));
|
|
Serial.println(F("Decode failed"));
|
|
#endif
|
|
return false;
|
|
}
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("PULSE_WIDTH: "));
|
|
Serial.print(F("decodedRawData=0x"));
|
|
Serial.println(decodedIRData.decodedRawData, HEX);
|
|
#endif
|
|
// fill array with decoded data
|
|
decodedIRData.decodedRawDataArray[i] = decodedIRData.decodedRawData;
|
|
tStartIndex += (2 * BITS_IN_RAW_DATA_TYPE);
|
|
tNumberOfBits -= BITS_IN_RAW_DATA_TYPE;
|
|
}
|
|
|
|
#if defined(USE_MSB_DECODING_FOR_DISTANCE_DECODER)
|
|
decodedIRData.flags = IRDATA_FLAGS_IS_MSB_FIRST;
|
|
#endif
|
|
|
|
// Check for repeat
|
|
checkForRepeatSpaceTicksAndSetFlag(DISTANCE_WIDTH_MAXIMUM_REPEAT_DISTANCE_MICROS / MICROS_PER_TICK);
|
|
|
|
/*
|
|
* Store timing data to reproduce frame for sending
|
|
*/
|
|
decodedIRData.DistanceWidthTimingInfo.HeaderMarkMicros = (decodedIRData.rawDataPtr->rawbuf[1] * MICROS_PER_TICK);
|
|
decodedIRData.DistanceWidthTimingInfo.HeaderSpaceMicros = (decodedIRData.rawDataPtr->rawbuf[2] * MICROS_PER_TICK);
|
|
decodedIRData.DistanceWidthTimingInfo.ZeroMarkMicros = tMarkMicrosShort;
|
|
decodedIRData.DistanceWidthTimingInfo.ZeroSpaceMicros = tSpaceMicrosShort;
|
|
if (tMarkMicrosLong != 0) {
|
|
decodedIRData.DistanceWidthTimingInfo.OneMarkMicros = tMarkMicrosLong;
|
|
|
|
decodedIRData.DistanceWidthTimingInfo.OneSpaceMicros = tSpaceMicrosShort;
|
|
if (tSpaceMicrosLong != 0) {
|
|
// Assume long space for zero when we have PulseDistanceWidth -> enables constant bit length
|
|
decodedIRData.DistanceWidthTimingInfo.ZeroSpaceMicros = tSpaceMicrosLong;
|
|
}
|
|
} else {
|
|
decodedIRData.DistanceWidthTimingInfo.OneMarkMicros = tMarkMicrosShort;
|
|
|
|
// Here tMarkMicrosLong is 0 => tSpaceMicrosLong != 0
|
|
decodedIRData.DistanceWidthTimingInfo.OneSpaceMicros = tSpaceMicrosLong;
|
|
}
|
|
|
|
#if defined(LOCAL_DEBUG)
|
|
Serial.print(F("DistanceWidthTimingInfo="));
|
|
IrReceiver.printDistanceWidthTimingInfo(&Serial, &decodedIRData.DistanceWidthTimingInfo);
|
|
Serial.println();
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
/** @}*/
|
|
#if defined(LOCAL_DEBUG)
|
|
#undef LOCAL_DEBUG
|
|
#endif
|
|
#endif // _IR_DISTANCE_WIDTH_HPP
|