ir_Aiwa.cpp

00001 #include "IRremote.h"
00002 #include "IRremoteInt.h"
00003 
00004 //==============================================================================
00005 //                         AAA   IIIII  W   W   AAA
00006 //                        A   A    I    W   W  A   A
00007 //                        AAAAA    I    W W W  AAAAA
00008 //                        A   A    I    W W W  A   A
00009 //                        A   A  IIIII   WWW   A   A
00010 //==============================================================================
00011 
00012 // Based off the RC-T501 RCU
00013 // Lirc file http://lirc.sourceforge.net/remotes/aiwa/RC-T501
00014 
00015 #define AIWA_RC_T501_HZ            38
00016 #define AIWA_RC_T501_BITS          15
00017 #define AIWA_RC_T501_PRE_BITS      26
00018 #define AIWA_RC_T501_POST_BITS      1
00019 #define AIWA_RC_T501_SUM_BITS    (AIWA_RC_T501_PRE_BITS + AIWA_RC_T501_BITS + AIWA_RC_T501_POST_BITS)
00020 #define AIWA_RC_T501_HDR_MARK    8800
00021 #define AIWA_RC_T501_HDR_SPACE   4500
00022 #define AIWA_RC_T501_BIT_MARK     500
00023 #define AIWA_RC_T501_ONE_SPACE    600
00024 #define AIWA_RC_T501_ZERO_SPACE  1700
00025 
00026 //+=============================================================================
00027 #if SEND_AIWA_RC_T501
00028 void  IRsend::sendAiwaRCT501 (int code)
00029 {
00030     unsigned long  pre = 0x0227EEC0;  // 26-bits
00031 
00032     // Set IR carrier frequency
00033     enableIROut(AIWA_RC_T501_HZ);
00034 
00035     // Header
00036     mark(AIWA_RC_T501_HDR_MARK);
00037     space(AIWA_RC_T501_HDR_SPACE);
00038 
00039     // Send "pre" data
00040     for (unsigned long  mask = 1UL << (26 - 1);  mask;  mask >>= 1) {
00041         mark(AIWA_RC_T501_BIT_MARK);
00042         if (pre & mask)  space(AIWA_RC_T501_ONE_SPACE) ;
00043         else             space(AIWA_RC_T501_ZERO_SPACE) ;
00044     }
00045 
00046 //-v- THIS CODE LOOKS LIKE IT MIGHT BE WRONG - CHECK!
00047 //    it only send 15bits and ignores the top bit
00048 //    then uses TOPBIT which is 0x80000000 to check the bit code
00049 //    I suspect TOPBIT should be changed to 0x00008000
00050 
00051     // Skip first code bit
00052     code <<= 1;
00053     // Send code
00054     for (int  i = 0;  i < 15;  i++) {
00055         mark(AIWA_RC_T501_BIT_MARK);
00056         if (code & 0x80000000)  space(AIWA_RC_T501_ONE_SPACE) ;
00057         else                    space(AIWA_RC_T501_ZERO_SPACE) ;
00058         code <<= 1;
00059     }
00060 
00061 //-^- THIS CODE LOOKS LIKE IT MIGHT BE WRONG - CHECK!
00062 
00063     // POST-DATA, 1 bit, 0x0
00064     mark(AIWA_RC_T501_BIT_MARK);
00065     space(AIWA_RC_T501_ZERO_SPACE);
00066 
00067     mark(AIWA_RC_T501_BIT_MARK);
00068     space(0);
00069 }
00070 #endif
00071 
00072 //+=============================================================================
00073 #if DECODE_AIWA_RC_T501
00074 bool  IRrecv::decodeAiwaRCT501 (decode_results *results)
00075 {
00076     int  data   = 0;
00077     int  offset = 1;
00078 
00079     // Check SIZE
00080     if (irparams.rawlen < 2 * (AIWA_RC_T501_SUM_BITS) + 4)  return false ;
00081 
00082     // Check HDR Mark/Space
00083     if (!MATCH_MARK (results->rawbuf[offset++], AIWA_RC_T501_HDR_MARK ))  return false ;
00084     if (!MATCH_SPACE(results->rawbuf[offset++], AIWA_RC_T501_HDR_SPACE))  return false ;
00085 
00086     offset += 26;  // skip pre-data - optional
00087     while(offset < irparams.rawlen - 4) {
00088         if (MATCH_MARK(results->rawbuf[offset], AIWA_RC_T501_BIT_MARK))  offset++ ;
00089         else                                                             return false ;
00090 
00091         // ONE & ZERO
00092         if      (MATCH_SPACE(results->rawbuf[offset], AIWA_RC_T501_ONE_SPACE))   data = (data << 1) | 1 ;
00093         else if (MATCH_SPACE(results->rawbuf[offset], AIWA_RC_T501_ZERO_SPACE))  data = (data << 1) | 0 ;
00094         else                                                                     break ;  // End of one & zero detected
00095         offset++;
00096     }
00097 
00098     results->bits = (offset - 1) / 2;
00099     if (results->bits < 42)  return false ;
00100 
00101     results->value       = data;
00102     results->decode_type = AIWA_RC_T501;
00103     return true;
00104 }
00105 #endif