framework-arduinoteensy-cxx20/libraries/IRremote/ir_Mitsubishi.cpp

#include "IRremote.h"
#include "IRremoteInt.h"

//==============================================================================
//    MMMMM  IIIII TTTTT   SSSS  U   U  BBBB   IIIII   SSSS  H   H  IIIII
//    M M M    I     T    S      U   U  B   B    I    S      H   H    I
//    M M M    I     T     SSS   U   U  BBBB     I     SSS   HHHHH    I
//    M   M    I     T        S  U   U  B   B    I        S  H   H    I
//    M   M  IIIII   T    SSSS    UUU   BBBBB  IIIII  SSSS   H   H  IIIII
//==============================================================================

// Looks like Sony except for timings, 48 chars of data and time/space different

#define MITSUBISHI_BITS 16

// Mitsubishi RM 75501
// 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
// #define MITSUBISHI_HDR_MARK	250  // seen range 3500
#define MITSUBISHI_HDR_SPACE	350 //  7*50+100
#define MITSUBISHI_ONE_MARK	1950 // 41*50-100
#define MITSUBISHI_ZERO_MARK  750 // 17*50-100
// #define MITSUBISHI_DOUBLE_SPACE_USECS  800  // usually ssee 713 - not using ticks as get number wrapround
// #define MITSUBISHI_RPT_LENGTH 45000

//+=============================================================================
#if DECODE_MITSUBISHI
bool  IRrecv::decodeMitsubishi (decode_results *results)
{
  // Serial.print("?!? decoding Mitsubishi:");Serial.print(irparams.rawlen); Serial.print(" want "); Serial.println( 2 * MITSUBISHI_BITS + 2);
  long data = 0;
  if (irparams.rawlen < 2 * MITSUBISHI_BITS + 2)  return false ;
  int offset = 0; // Skip first space
  // Initial space

#if 0
  // 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
  Serial.print("IR Gap: ");
  Serial.println( results->rawbuf[offset]);
  Serial.println( "test against:");
  Serial.println(results->rawbuf[offset]);
#endif

#if 0
  // Not seeing double keys from Mitsubishi
  if (results->rawbuf[offset] < MITSUBISHI_DOUBLE_SPACE_USECS) {
    // Serial.print("IR Gap found: ");
    results->bits = 0;
    results->value = REPEAT;
    results->decode_type = MITSUBISHI;
    return true;
  }
#endif

  offset++;

  // Typical
  // 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

  // Initial Space
  if (!MATCH_MARK(results->rawbuf[offset], MITSUBISHI_HDR_SPACE))  return false ;
  offset++;

  while (offset + 1 < irparams.rawlen) {
    if      (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ONE_MARK))   data = (data << 1) | 1 ;
    else if (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ZERO_MARK))  data <<= 1 ;
    else                                                                 return false ;
    offset++;

    if (!MATCH_SPACE(results->rawbuf[offset], MITSUBISHI_HDR_SPACE))  break ;
    offset++;
  }

  // Success
  results->bits = (offset - 1) / 2;
  if (results->bits < MITSUBISHI_BITS) {
    results->bits = 0;
    return false;
  }

  results->value       = data;
  results->decode_type = MITSUBISHI;
  return true;
}
#endif