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| 1 | +#include "IRremote.h" |
| 2 | +#include "IRremoteInt.h" |
| 3 | + |
| 4 | +//============================================================================== |
| 5 | +// L EEEEEE EEEE OOOO |
| 6 | +// L E E O O |
| 7 | +// L EEEE E EEE O O |
| 8 | +// L E E E O O LEGO Power Functions |
| 9 | +// LLLLLL EEEEEE EEEE OOOO Copyright (c) 2016 Philipp Henkel |
| 10 | +//============================================================================== |
| 11 | + |
| 12 | +// Supported Devices |
| 13 | +// LEGO® Power Functions IR Receiver 8884 |
| 14 | + |
| 15 | +//+============================================================================= |
| 16 | +// |
| 17 | +#if SEND_LEGO_PF |
| 18 | + |
| 19 | +class BitStreamEncoder { |
| 20 | + private: |
| 21 | + uint16_t data; |
| 22 | + bool repeatMessage; |
| 23 | + int messageBitIdx; |
| 24 | + int repeatCount; |
| 25 | + int messageLength; |
| 26 | + |
| 27 | + // HIGH data bit = IR mark + high pause |
| 28 | + // LOW data bit = IR mark + low pause |
| 29 | + static const int LOW_BIT_DURATION = 421; |
| 30 | + static const int HIGH_BIT_DURATION = 711; |
| 31 | + static const int START_BIT_DURATION = 1184; |
| 32 | + static const int STOP_BIT_DURATION = 1184; |
| 33 | + static const int IR_MARK_DURATION = 158; |
| 34 | + static const int HIGH_PAUSE_DURATION = HIGH_BIT_DURATION - IR_MARK_DURATION; |
| 35 | + static const int LOW_PAUSE_DURATION = LOW_BIT_DURATION - IR_MARK_DURATION; |
| 36 | + static const int START_PAUSE_DURATION = START_BIT_DURATION - IR_MARK_DURATION; |
| 37 | + static const int STOP_PAUSE_DURATION = STOP_BIT_DURATION - IR_MARK_DURATION; |
| 38 | + static const int MESSAGE_BITS = 18; |
| 39 | + static const int MAX_MESSAGE_LENGTH = 16000; |
| 40 | + |
| 41 | + public: |
| 42 | + void reset(uint16_t data, bool repeatMessage) { |
| 43 | + this->data = data; |
| 44 | + this->repeatMessage = repeatMessage; |
| 45 | + messageBitIdx = 0; |
| 46 | + repeatCount = 0; |
| 47 | + messageLength = getMessageLength(); |
| 48 | + } |
| 49 | + |
| 50 | + int getChannelId() const { return 1 + ((data >> 12) & 0x3); } |
| 51 | + |
| 52 | + int getMessageLength() const { |
| 53 | + // Sum up all marks |
| 54 | + int length = MESSAGE_BITS * IR_MARK_DURATION; |
| 55 | + |
| 56 | + // Sum up all pauses |
| 57 | + length += START_PAUSE_DURATION; |
| 58 | + for (unsigned long mask = 1UL << 15; mask; mask >>= 1) { |
| 59 | + if (data & mask) { |
| 60 | + length += HIGH_PAUSE_DURATION; |
| 61 | + } else { |
| 62 | + length += LOW_PAUSE_DURATION; |
| 63 | + } |
| 64 | + } |
| 65 | + length += STOP_PAUSE_DURATION; |
| 66 | + return length; |
| 67 | + } |
| 68 | + |
| 69 | + boolean next() { |
| 70 | + messageBitIdx++; |
| 71 | + if (messageBitIdx >= MESSAGE_BITS) { |
| 72 | + repeatCount++; |
| 73 | + messageBitIdx = 0; |
| 74 | + } |
| 75 | + if (repeatCount >= 1 && !repeatMessage) { |
| 76 | + return false; |
| 77 | + } else if (repeatCount >= 5) { |
| 78 | + return false; |
| 79 | + } else { |
| 80 | + return true; |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + int getMarkDuration() const { return IR_MARK_DURATION; } |
| 85 | + |
| 86 | + int getPauseDuration() const { |
| 87 | + if (messageBitIdx == 0) |
| 88 | + return START_PAUSE_DURATION; |
| 89 | + else if (messageBitIdx < MESSAGE_BITS - 1) { |
| 90 | + return getDataBitPause(); |
| 91 | + } else { |
| 92 | + return getStopPause(); |
| 93 | + } |
| 94 | + } |
| 95 | + |
| 96 | + private: |
| 97 | + int getDataBitPause() const { |
| 98 | + const int pos = MESSAGE_BITS - 2 - messageBitIdx; |
| 99 | + const bool isHigh = data & (1 << pos); |
| 100 | + return isHigh ? HIGH_PAUSE_DURATION : LOW_PAUSE_DURATION; |
| 101 | + } |
| 102 | + |
| 103 | + int getStopPause() const { |
| 104 | + if (repeatMessage) { |
| 105 | + return getRepeatStopPause(); |
| 106 | + } else { |
| 107 | + return STOP_PAUSE_DURATION; |
| 108 | + } |
| 109 | + } |
| 110 | + |
| 111 | + int getRepeatStopPause() const { |
| 112 | + if (repeatCount == 0 || repeatCount == 1) { |
| 113 | + return STOP_PAUSE_DURATION + 5 * MAX_MESSAGE_LENGTH - messageLength; |
| 114 | + } else if (repeatCount == 2 || repeatCount == 3) { |
| 115 | + return STOP_PAUSE_DURATION |
| 116 | + + (6 + 2 * getChannelId()) * MAX_MESSAGE_LENGTH - messageLength; |
| 117 | + } else { |
| 118 | + return STOP_PAUSE_DURATION; |
| 119 | + } |
| 120 | + } |
| 121 | +}; |
| 122 | + |
| 123 | +void IRsend::sendLegoPowerFunctions(uint16_t data, bool repeat) |
| 124 | +{ |
| 125 | + enableIROut(38); |
| 126 | + static BitStreamEncoder bitStreamEncoder; |
| 127 | + bitStreamEncoder.reset(data, repeat); |
| 128 | + do { |
| 129 | + mark(bitStreamEncoder.getMarkDuration()); |
| 130 | + space(bitStreamEncoder.getPauseDuration()); |
| 131 | + } while (bitStreamEncoder.next()); |
| 132 | +} |
| 133 | +#endif |
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