436 lines
18 KiB
C++
436 lines
18 KiB
C++
/*
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* ir_NEC.hpp
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*
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* Contains functions for receiving and sending NEC IR Protocol in "raw" and standard format with 16 or 8 bit address and 8 bit command
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*
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* This file is part of Arduino-IRremote https://github.com/Arduino-IRremote/Arduino-IRremote.
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*
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************************************************************************************
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* MIT License
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*
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* Copyright (c) 2020-2023 Armin Joachimsmeyer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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************************************************************************************
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*/
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#ifndef _IR_NEC_HPP
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#define _IR_NEC_HPP
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#if defined(DEBUG) && !defined(LOCAL_DEBUG)
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#define LOCAL_DEBUG // IR_DEBUG_PRINT is a real print function here. Add local debug output.
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#else
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//#define LOCAL_DEBUG // This enables debug output only for this file. IR_DEBUG_PRINT is still a void function here.
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#endif
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/** \addtogroup Decoder Decoders and encoders for different protocols
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* @{
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*/
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//==============================================================================
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// N N EEEEE CCCC
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// NN N E C
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// N N N EEE C
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// N NN E C
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// N N EEEEE CCCC
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//==============================================================================
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/*
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Protocol=NEC Address=0x4 Command=0x8 Raw-Data=0xF708FB04 32 bits LSB first
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+8950,-4450
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+ 600,- 500 + 650,- 500 + 600,-1650 + 600,- 550
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+ 600,- 500 + 600,- 500 + 650,- 500 + 600,- 500
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+ 650,-1650 + 600,-1600 + 650,- 500 + 600,-1650
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+ 600,-1650 + 600,-1650 + 600,-1600 + 650,-1600
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+ 650,- 500 + 600,- 550 + 600,- 500 + 600,-1650
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+ 600,- 550 + 600,- 500 + 600,- 550 + 600,- 500
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+ 600,-1650 + 600,-1650 + 600,-1650 + 600,- 550
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+ 600,-1650 + 600,-1650 + 600,-1650 + 600,-1600
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+ 650
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Sum: 68000
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Protocol=NEC Address=0x8 Command=0x7 Repeat gap=40900us
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rawData[4]:
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-40900
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+10450,-2250
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+ 700
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Sum: 13400
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*/
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// http://www.hifi-remote.com/wiki/index.php/NEC
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// https://www.sbprojects.net/knowledge/ir/nec.php
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// NEC: LSB first, <start bit><address:16> (or <address:8><inverted address:8>) <command:8><inverted command:8><stop bit>.
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// ONKYO like NEC but 16 independent address and command bits: <start bit><address:16><command:16><stop bit>
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// Standard NEC sends a special fixed repeat frame.
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// NEC2 sends the same full frame after the 110 ms. I have a DVD remote with NEC2.
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// NEC and NEC 2 only differ in the repeat frames, so the protocol can only be detected correctly after the first repeat.
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// PIONEER (not implemented) is NEC2 with 40 kHz
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//
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// For Apple see https://en.wikipedia.org/wiki/Apple_Remote - <start bit><0x87EE:16><device ID:8><command:7><parity><stop bit> - not implemented!
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// The parity is not implemented, so we get: <start bit><0x87EE:16><device ID:8><command:8><stop bit>
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//
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// IRP notation:
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// IRP: NEC {38.0k,564}<1,-1|1,-3>(16,-8,D:8,S:8,F:8,~F:8,1,^108m,(16,-4,1,^108m)*) ==> "*" means send special repeat frames o ore more times
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// IRP: NEC2 {38.0k,564}<1,-1|1,-3>(16,-8,D:8,S:8,F:8,~F:8,1,^108m)+ ==> "+" means send frame 1 or more times (special repeat is missing here!)
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// Interpretation of IRP notation:
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// {38.0k,564} ==> 38.0k -> Frequency , 564 -> unit in microseconds (we use 560), no "msb", so "lsb" is assumed
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// <1,-1|1,-3> ==> Zero is 1 unit mark and space | One is 1 unit mark and 3 units space
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// 16,-8 ==> Start bit durations
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// D:8,S:8,F:8,~F:8 ==> D:8 -> 8 bit bitfield for Device, S:8 -> 8 bit bitfield for Subdevice, F:8 -> 8 bit bitfield for Function, ~F:8 -> 8 bit inverted bitfield for Function
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// 1,^108m ==> 1 -> unit mark Stop bit, ^108m -> wait until 108 milliseconds after start of protocol (we use 110)
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//
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#define NEC_ADDRESS_BITS 16 // 16 bit address or 8 bit address and 8 bit inverted address
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#define NEC_COMMAND_BITS 16 // Command and inverted command
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#define NEC_BITS (NEC_ADDRESS_BITS + NEC_COMMAND_BITS)
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#define NEC_UNIT 560 // 21.28 periods of 38 kHz, 11.2 ticks TICKS_LOW = 8.358 TICKS_HIGH = 15.0
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#define NEC_HEADER_MARK (16 * NEC_UNIT) // 9000 | 180
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#define NEC_HEADER_SPACE (8 * NEC_UNIT) // 4500 | 90
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#define NEC_BIT_MARK NEC_UNIT
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#define NEC_ONE_SPACE (3 * NEC_UNIT) // 1690 | 33.8 TICKS_LOW = 25.07 TICKS_HIGH = 45.0
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#define NEC_ZERO_SPACE NEC_UNIT
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#define NEC_REPEAT_HEADER_SPACE (4 * NEC_UNIT) // 2250
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#define NEC_AVERAGE_DURATION 62000 // NEC_HEADER_MARK + NEC_HEADER_SPACE + 32 * 2,5 * NEC_UNIT + NEC_UNIT // 2.5 because we assume more zeros than ones
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#define NEC_MINIMAL_DURATION 49900 // NEC_HEADER_MARK + NEC_HEADER_SPACE + 32 * 2 * NEC_UNIT + NEC_UNIT // 2.5 because we assume more zeros than ones
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#define NEC_REPEAT_DURATION (NEC_HEADER_MARK + NEC_REPEAT_HEADER_SPACE + NEC_BIT_MARK) // 12 ms
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#define NEC_REPEAT_PERIOD 110000 // Commands are repeated every 110 ms (measured from start to start) for as long as the key on the remote control is held down.
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#define NEC_REPEAT_DISTANCE (NEC_REPEAT_PERIOD - NEC_AVERAGE_DURATION) // 48 ms
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#define NEC_MAXIMUM_REPEAT_DISTANCE (NEC_REPEAT_PERIOD - NEC_MINIMAL_DURATION + 10000) // 70 ms
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#define APPLE_ADDRESS 0x87EE
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struct PulseDistanceWidthProtocolConstants NECProtocolConstants =
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{ NEC, NEC_KHZ, NEC_HEADER_MARK, NEC_HEADER_SPACE, NEC_BIT_MARK,
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NEC_ONE_SPACE, NEC_BIT_MARK, NEC_ZERO_SPACE, PROTOCOL_IS_LSB_FIRST, (NEC_REPEAT_PERIOD / MICROS_IN_ONE_MILLI),
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&sendNECSpecialRepeat };
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// Like NEC but repeats are full frames instead of special NEC repeats
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struct PulseDistanceWidthProtocolConstants NEC2ProtocolConstants = { NEC2, NEC_KHZ, NEC_HEADER_MARK, NEC_HEADER_SPACE, NEC_BIT_MARK,
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NEC_ONE_SPACE, NEC_BIT_MARK, NEC_ZERO_SPACE, PROTOCOL_IS_LSB_FIRST, (NEC_REPEAT_PERIOD / MICROS_IN_ONE_MILLI), NULL };
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/************************************
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* Start of send and decode functions
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************************************/
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/**
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* Send special NEC repeat frame
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* Repeat commands should be sent in a 110 ms raster.
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*/
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void IRsend::sendNECRepeat() {
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enableIROut (NEC_KHZ); // 38 kHz
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mark(NEC_HEADER_MARK); // + 9000
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space(NEC_REPEAT_HEADER_SPACE); // - 2250
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mark(NEC_BIT_MARK); // + 560
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}
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/**
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* Static function variant of IRsend::sendNECRepeat
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* For use in ProtocolConstants. Saves up to 250 bytes compared to a member function.
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*/
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void sendNECSpecialRepeat() {
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IrSender.enableIROut(NEC_KHZ); // 38 kHz
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IrSender.mark(NEC_HEADER_MARK); // + 9000
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IrSender.space(NEC_REPEAT_HEADER_SPACE); // - 2250
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IrSender.mark(NEC_BIT_MARK); // + 560
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}
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uint32_t IRsend::computeNECRawDataAndChecksum(uint16_t aAddress, uint16_t aCommand) {
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LongUnion tRawData;
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// Address 16 bit LSB first
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if ((aAddress & 0xFF00) == 0) {
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// assume 8 bit address -> send 8 address bits and then 8 inverted address bits LSB first
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tRawData.UByte.LowByte = aAddress;
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tRawData.UByte.MidLowByte = ~tRawData.UByte.LowByte;
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} else {
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tRawData.UWord.LowWord = aAddress;
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}
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// send 8 command bits and then 8 inverted command bits LSB first
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tRawData.UByte.MidHighByte = aCommand;
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tRawData.UByte.HighByte = ~aCommand;
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return tRawData.ULong;
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}
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/**
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* NEC Send frame and special repeats
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* There is NO delay after the last sent repeat!
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* @param aNumberOfRepeats If < 0 then only a special NEC repeat frame will be sent by calling NECProtocolConstants.SpecialSendRepeatFunction().
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*/
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void IRsend::sendNEC(uint16_t aAddress, uint8_t aCommand, int_fast8_t aNumberOfRepeats) {
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sendPulseDistanceWidth(&NECProtocolConstants, computeNECRawDataAndChecksum(aAddress, aCommand), NEC_BITS, aNumberOfRepeats);
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}
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/*
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* NEC2 Send frame and repeat the frame for each requested repeat
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* There is NO delay after the last sent repeat!
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* @param aNumberOfRepeats If < 0 then nothing is sent.
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*/
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void IRsend::sendNEC2(uint16_t aAddress, uint8_t aCommand, int_fast8_t aNumberOfRepeats) {
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sendPulseDistanceWidth(&NEC2ProtocolConstants, computeNECRawDataAndChecksum(aAddress, aCommand), NEC_BITS, aNumberOfRepeats);
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}
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/*
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* Repeat commands should be sent in a 110 ms raster.
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* There is NO delay after the last sent repeat!
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* @param aNumberOfRepeats If < 0 then only a special repeat frame without leading and trailing space
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* will be sent by calling NECProtocolConstants.SpecialSendRepeatFunction().
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*/
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void IRsend::sendOnkyo(uint16_t aAddress, uint16_t aCommand, int_fast8_t aNumberOfRepeats) {
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sendPulseDistanceWidth(&NECProtocolConstants, (uint32_t) aCommand << 16 | aAddress, NEC_BITS, aNumberOfRepeats);
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}
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/*
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* Repeat commands should be sent in a 110 ms raster.
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* There is NO delay after the last sent repeat!
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* https://en.wikipedia.org/wiki/Apple_Remote
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* https://gist.github.com/darconeous/4437f79a34e3b6441628
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* @param aNumberOfRepeats If < 0 then only a special repeat frame without leading and trailing space
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* will be sent by calling NECProtocolConstants.SpecialSendRepeatFunction().
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*/
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void IRsend::sendApple(uint8_t aDeviceId, uint8_t aCommand, int_fast8_t aNumberOfRepeats) {
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LongUnion tRawData;
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// Address 16 bit LSB first fixed value of 0x87EE
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tRawData.UWord.LowWord = APPLE_ADDRESS;
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// send Apple code and then 8 command bits LSB first
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tRawData.UByte.MidHighByte = aCommand;
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tRawData.UByte.HighByte = aDeviceId; // e.g. 0xD7
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sendPulseDistanceWidth(&NECProtocolConstants, tRawData.ULong, NEC_BITS, aNumberOfRepeats);
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}
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/*
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* Sends NEC protocol
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* @param aNumberOfRepeats If < 0 then only a special repeat frame without leading and trailing space
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* will be sent by calling NECProtocolConstants.SpecialSendRepeatFunction().
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*/
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void IRsend::sendNECRaw(uint32_t aRawData, int_fast8_t aNumberOfRepeats) {
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sendPulseDistanceWidth(&NECProtocolConstants, aRawData, NEC_BITS, aNumberOfRepeats);
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}
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/**
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* Decodes also Onkyo and Apple
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*/
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bool IRrecv::decodeNEC() {
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/*
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* First check for right data length
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* Next check start bit
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* Next try the decode
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*/
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// Check we have the right amount of data (68). The +4 is for initial gap, start bit mark and space + stop bit mark.
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if (decodedIRData.rawlen != ((2 * NEC_BITS) + 4) && (decodedIRData.rawlen != 4)) {
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IR_DEBUG_PRINT(F("NEC: "));
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IR_DEBUG_PRINT(F("Data length="));
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IR_DEBUG_PRINT(decodedIRData.rawlen);
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IR_DEBUG_PRINTLN(F(" is not 68 or 4"));
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return false;
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}
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// Check header "mark" this must be done for repeat and data
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if (!matchMark(decodedIRData.rawDataPtr->rawbuf[1], NEC_HEADER_MARK)) {
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return false;
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}
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// Check for repeat - here we have another header space length
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if (decodedIRData.rawlen == 4) {
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if (matchSpace(decodedIRData.rawDataPtr->rawbuf[2], NEC_REPEAT_HEADER_SPACE)
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&& matchMark(decodedIRData.rawDataPtr->rawbuf[3], NEC_BIT_MARK)) {
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decodedIRData.flags = IRDATA_FLAGS_IS_REPEAT | IRDATA_FLAGS_IS_LSB_FIRST;
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decodedIRData.address = lastDecodedAddress;
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decodedIRData.command = lastDecodedCommand;
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decodedIRData.protocol = lastDecodedProtocol;
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return true;
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}
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return false;
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}
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// Check command header space
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if (!matchSpace(decodedIRData.rawDataPtr->rawbuf[2], NEC_HEADER_SPACE)) {
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#if defined(LOCAL_DEBUG)
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Serial.print(F("NEC: "));
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Serial.println(F("Header space length is wrong"));
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#endif
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return false;
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}
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// Try to decode as NEC protocol
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if (!decodePulseDistanceWidthData(&NECProtocolConstants, NEC_BITS)) {
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#if defined(LOCAL_DEBUG)
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Serial.print(F("NEC: "));
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Serial.println(F("Decode failed"));
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#endif
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return false;
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}
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// Success
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// decodedIRData.flags = IRDATA_FLAGS_IS_LSB_FIRST; // Not required, since this is the start value
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LongUnion tValue;
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tValue.ULong = decodedIRData.decodedRawData;
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decodedIRData.command = tValue.UByte.MidHighByte; // 8 bit
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#if defined(DECODE_ONKYO)
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// Here only Onkyo protocol is supported -> force 16 bit address and command decoding
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decodedIRData.address = tValue.UWord.LowWord; // first 16 bit
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decodedIRData.protocol = ONKYO;
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decodedIRData.command = tValue.UWord.HighWord; // 16 bit command
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#else
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// Address
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if (tValue.UWord.LowWord == APPLE_ADDRESS) {
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/*
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* Apple
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*/
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decodedIRData.protocol = APPLE;
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decodedIRData.address = tValue.UByte.HighByte;
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} else {
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/*
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* NEC LSB first, so first sent bit is also LSB of decodedIRData.decodedRawData
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*/
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if (tValue.UByte.LowByte == (uint8_t)(~tValue.UByte.MidLowByte)) {
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// standard 8 bit address NEC protocol
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decodedIRData.address = tValue.UByte.LowByte; // first 8 bit
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} else {
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// extended NEC protocol
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decodedIRData.address = tValue.UWord.LowWord; // first 16 bit
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}
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// Check for command if it is 8 bit NEC or 16 bit ONKYO
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if (tValue.UByte.MidHighByte == (uint8_t)(~tValue.UByte.HighByte)) {
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decodedIRData.protocol = NEC;
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} else {
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decodedIRData.protocol = ONKYO;
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decodedIRData.command = tValue.UWord.HighWord; // 16 bit command
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}
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}
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#endif
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decodedIRData.numberOfBits = NEC_BITS;
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// check for NEC2 repeat, do not check for same content ;-)
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checkForRepeatSpaceTicksAndSetFlag(NEC_MAXIMUM_REPEAT_DISTANCE / MICROS_PER_TICK);
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if (decodedIRData.flags & IRDATA_FLAGS_IS_REPEAT) {
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decodedIRData.protocol = NEC2;
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decodedIRData.flags |= IRDATA_FLAGS_IS_PROTOCOL_WITH_DIFFERENT_REPEAT;
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}
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return true;
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}
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/*********************************************************************************
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* Old deprecated functions, kept for backward compatibility to old 2.0 tutorials
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*********************************************************************************/
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bool IRrecv::decodeNECMSB(decode_results *aResults) {
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unsigned int offset = 1; // Index in to results; Skip first space.
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// Check header "mark"
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if (!matchMark(aResults->rawbuf[offset], NEC_HEADER_MARK)) {
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return false;
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}
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offset++;
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// Check for repeat
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if ((aResults->rawlen == 4) && matchSpace(aResults->rawbuf[offset], NEC_REPEAT_HEADER_SPACE)
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&& matchMark(aResults->rawbuf[offset + 1], NEC_BIT_MARK)) {
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aResults->bits = 0;
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aResults->value = 0xFFFFFFFF;
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decodedIRData.flags |= IRDATA_FLAGS_IS_REPEAT;
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decodedIRData.protocol = NEC;
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return true;
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}
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// Check we have the right amount of data (32). +4 for initial gap, start bit mark and space + stop bit mark
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if (aResults->rawlen != (2 * NEC_BITS) + 4) {
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IR_DEBUG_PRINT(F("NEC MSB: "));
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IR_DEBUG_PRINT(F("Data length="));
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IR_DEBUG_PRINT(aResults->rawlen);
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IR_DEBUG_PRINTLN(F(" is not 68"));
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return false;
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}
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// Check header "space"
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if (!matchSpace(aResults->rawbuf[offset], NEC_HEADER_SPACE)) {
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#if defined(LOCAL_DEBUG)
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Serial.print(F("NEC MSB: "));
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Serial.println(F("Header space length is wrong"));
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#endif
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return false;
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}
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offset++;
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if (!decodePulseDistanceWidthData(NEC_BITS, offset, NEC_BIT_MARK, 0, NEC_ONE_SPACE, NEC_ZERO_SPACE, PROTOCOL_IS_MSB_FIRST)) {
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#if defined(LOCAL_DEBUG)
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Serial.print(F("NEC MSB: "));
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Serial.println(F("Decode failed"));
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#endif
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return false;
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}
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// Stop bit
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if (!matchMark(aResults->rawbuf[offset + (2 * NEC_BITS)], NEC_BIT_MARK)) {
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#if defined(LOCAL_DEBUG)
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Serial.print(F("NEC MSB: "));
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Serial.println(F("Stop bit mark length is wrong"));
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#endif
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return false;
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}
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// Success
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aResults->value = decodedIRData.decodedRawData;
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aResults->bits = NEC_BITS;
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aResults->decode_type = NEC;
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decodedIRData.protocol = NEC;
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return true;
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}
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/**
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* With Send sendNECMSB() you can send your old 32 bit codes.
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* To convert one into the other, you must reverse the byte positions and then reverse all bit positions of each byte.
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* Use bitreverse32Bit().
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* Or write it as one binary string and reverse/mirror it.
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* Example:
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* 0xCB340102 byte reverse -> 02 01 34 CB bit reverse-> 40 80 2C D3.
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* 0xCB340102 is binary 11001011001101000000000100000010.
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* 0x40802CD3 is binary 01000000100000000010110011010011.
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* If you read the first binary sequence backwards (right to left), you get the second sequence.
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*/
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void IRsend::sendNECMSB(uint32_t data, uint8_t nbits, bool repeat) {
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// Set IR carrier frequency
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enableIROut (NEC_KHZ);
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|
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if (data == 0xFFFFFFFF || repeat) {
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sendNECRepeat();
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return;
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}
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// Header
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|
mark(NEC_HEADER_MARK);
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space(NEC_HEADER_SPACE);
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|
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// Old version with MSB first Data + stop bit
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sendPulseDistanceWidthData(NEC_BIT_MARK, NEC_ONE_SPACE, NEC_BIT_MARK, NEC_ZERO_SPACE, data, nbits, PROTOCOL_IS_MSB_FIRST);
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}
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/** @}*/
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#if defined(LOCAL_DEBUG)
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|
#undef LOCAL_DEBUG
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|
#endif
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#endif // _IR_NEC_HPP
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