ir_Mitsubishi.cpp

00001 #include "IRremote.h"
00002 #include "IRremoteInt.h"
00003 
00004 //==============================================================================
00005 //    MMMMM  IIIII TTTTT   SSSS  U   U  BBBB   IIIII   SSSS  H   H  IIIII
00006 //    M M M    I     T    S      U   U  B   B    I    S      H   H    I
00007 //    M M M    I     T     SSS   U   U  BBBB     I     SSS   HHHHH    I
00008 //    M   M    I     T        S  U   U  B   B    I        S  H   H    I
00009 //    M   M  IIIII   T    SSSS    UUU   BBBBB  IIIII  SSSS   H   H  IIIII
00010 //==============================================================================
00011 
00012 // Looks like Sony except for timings, 48 chars of data and time/space different
00013 
00014 #define MITSUBISHI_BITS 16
00015 
00016 // Mitsubishi RM 75501
00017 // 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
00018 // #define MITSUBISHI_HDR_MARK  250  // seen range 3500
00019 #define MITSUBISHI_HDR_SPACE    350 //  7*50+100
00020 #define MITSUBISHI_ONE_MARK 1950 // 41*50-100
00021 #define MITSUBISHI_ZERO_MARK  750 // 17*50-100
00022 // #define MITSUBISHI_DOUBLE_SPACE_USECS  800  // usually ssee 713 - not using ticks as get number wrapround
00023 // #define MITSUBISHI_RPT_LENGTH 45000
00024 
00025 //+=============================================================================
00026 #if DECODE_MITSUBISHI
00027 bool  IRrecv::decodeMitsubishi (decode_results *results)
00028 {
00029   //printf("?!? decoding Mitsubishi:%d want %d\n", irparams.rawlen, 2 * MITSUBISHI_BITS + 2);
00030   long data = 0;
00031   if (irparams.rawlen < 2 * MITSUBISHI_BITS + 2)  return false ;
00032   int offset = 0; // Skip first space
00033   // Initial space
00034 
00035 #if 0
00036   // 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
00037   printf("IR Gap: %d\n", results->rawbuf[offset]);
00038   printf("test against: %d\n", results->rawbuf[offset]);
00039 #endif
00040 
00041 #if 0
00042   // Not seeing double keys from Mitsubishi
00043   if (results->rawbuf[offset] < MITSUBISHI_DOUBLE_SPACE_USECS) {
00044     // Serial.print("IR Gap found: ");
00045     results->bits = 0;
00046     results->value = REPEAT;
00047     results->decode_type = MITSUBISHI;
00048     return true;
00049   }
00050 #endif
00051 
00052   offset++;
00053 
00054   // Typical
00055   // 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
00056 
00057   // Initial Space
00058   if (!MATCH_MARK(results->rawbuf[offset], MITSUBISHI_HDR_SPACE))  return false ;
00059   offset++;
00060 
00061   while (offset + 1 < irparams.rawlen) {
00062     if      (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ONE_MARK))   data = (data << 1) | 1 ;
00063     else if (MATCH_MARK(results->rawbuf[offset], MITSUBISHI_ZERO_MARK))  data <<= 1 ;
00064     else                                                                 return false ;
00065     offset++;
00066 
00067     if (!MATCH_SPACE(results->rawbuf[offset], MITSUBISHI_HDR_SPACE))  break ;
00068     offset++;
00069   }
00070 
00071   // Success
00072   results->bits = (offset - 1) / 2;
00073   if (results->bits < MITSUBISHI_BITS) {
00074     results->bits = 0;
00075     return false;
00076   }
00077 
00078   results->value       = data;
00079   results->decode_type = MITSUBISHI;
00080   return true;
00081 }
00082 #endif
00083