mirror of https://github.com/arendst/Tasmota.git
115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
// Copyright 2017 David Conran
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#include "IRrecv.h"
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#include "IRsend.h"
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// AAA IIIII W W AAA
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// A A I W W A A
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// AAAAA I W W W AAAAA
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// A A I W W W A A
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// A A IIIII WWW A A
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// Based off the RC-T501 RCU
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// Added by David Conran. (Inspired by IRremoteESP8266's implementation:
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// https://github.com/z3t0/Arduino-IRremote)
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const uint16_t kAiwaRcT501PreBits = 26;
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const uint16_t kAiwaRcT501PostBits = 1;
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// NOTE: These are the compliment (inverted) of lirc values as
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// lirc uses a '0' for a mark, and a '1' for a space.
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const uint64_t kAiwaRcT501PreData = 0x1D8113FULL; // 26-bits
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const uint64_t kAiwaRcT501PostData = 1ULL;
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#if SEND_AIWA_RC_T501
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// Send an Aiwa RC T501 formatted message.
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//
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// Args:
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// data: The message to be sent.
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// nbits: The number of bits of the message to be sent.
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// Typically kAiwaRcT501Bits. Max is 37 = (64 - 27)
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// repeat: The number of times the command is to be repeated.
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//
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// Status: BETA / Should work.
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//
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// Ref:
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// http://lirc.sourceforge.net/remotes/aiwa/RC-T501
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void IRsend::sendAiwaRCT501(uint64_t data, uint16_t nbits, uint16_t repeat) {
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// Appears to be an extended NEC1 protocol. i.e. 42 bits instead of 32 bits.
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// So use sendNEC instead, however the twist is it has a fixed 26 bit
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// prefix, and a fixed postfix bit.
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uint64_t new_data = ((kAiwaRcT501PreData << (nbits + kAiwaRcT501PostBits)) |
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(data << kAiwaRcT501PostBits) | kAiwaRcT501PostData);
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nbits += kAiwaRcT501PreBits + kAiwaRcT501PostBits;
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if (nbits > sizeof(new_data) * 8)
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return; // We are overflowing. Abort, and don't send.
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sendNEC(new_data, nbits, repeat);
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}
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#endif
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#if DECODE_AIWA_RC_T501
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// Decode the supplied Aiwa RC T501 message.
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//
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// Args:
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// results: Ptr to the data to decode and where to store the decode result.
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// nbits: The number of data bits to expect. Typically kAiwaRcT501Bits.
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// strict: Flag indicating if we should perform strict matching.
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// Returns:
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// boolean: True if it can decode it, false if it can't.
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//
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// Status: BETA / Should work.
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//
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// Notes:
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// Aiwa RC T501 appears to be a 42 bit variant of the NEC1 protocol.
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// However, we historically (original Arduino IRremote project) treats it as
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// a 15 bit (data) protocol. So, we expect nbits to typically be 15, and we
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// will remove the prefix and postfix from the raw data, and use that as
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// the result.
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//
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// Ref:
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// http://www.sbprojects.com/knowledge/ir/nec.php
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bool IRrecv::decodeAiwaRCT501(decode_results *results, uint16_t nbits,
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bool strict) {
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// Compliance
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if (strict && nbits != kAiwaRcT501Bits)
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return false; // Doesn't match our protocol defn.
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// Add on the pre & post bits to our requested bit length.
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uint16_t expected_nbits = nbits + kAiwaRcT501PreBits + kAiwaRcT501PostBits;
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uint64_t new_data;
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if (expected_nbits > sizeof(new_data) * 8)
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return false; // We can't possibly match something that big.
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// Decode it as a much bigger (non-standard) NEC message, so we have to turn
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// off strict mode checking for NEC.
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if (!decodeNEC(results, expected_nbits, false))
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return false; // The NEC decode had a problem, so we should too.
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uint16_t actual_bits = results->bits;
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new_data = results->value;
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if (actual_bits < expected_nbits)
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return false; // The data we caught was undersized. Throw it back.
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if ((new_data & 0x1ULL) != kAiwaRcT501PostData)
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return false; // The post data doesn't match, so it can't be this protocol.
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// Trim off the post data bit.
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new_data >>= kAiwaRcT501PostBits;
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actual_bits -= kAiwaRcT501PostBits;
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// Extract out our likely new value and put it back in the results.
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actual_bits -= kAiwaRcT501PreBits;
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results->value = new_data & ((1ULL << actual_bits) - 1);
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// Check the prefix data matches.
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new_data >>= actual_bits; // Trim off the new data to expose the prefix.
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if (new_data != kAiwaRcT501PreData) // Check the prefix.
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return false;
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// Compliance
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if (strict && results->bits != expected_nbits) return false;
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// Success
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results->decode_type = AIWA_RC_T501;
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results->bits = actual_bits;
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results->address = 0;
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results->command = 0;
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return true;
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}
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#endif
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