Added Aiwa protocol (remote control RC-T501).

Added Aiwa protocol (remote control RC-T501) based on lirc file.
Updated IRrecvDump example, added SendDemo example (AiwaRCT501SendDemo).

IRremote.cpp

@@ -506,6 +506,13 @@ int IRrecv::decode(decode_results *results) {
   if (decodeWhynter(results)) {
     return DECODED;
   }
+// Aiwa RC-T501
+#ifdef DEBUG
+  Serial.println("Attempting Aiwa RC-T501 decode");
+#endif 
+  if (decodeAiwaRCT501(results)) {
+    return DECODED;
+  }
   // decodeHash returns a hash on any input.
   // Thus, it needs to be last in the list.
   // If you add any decodes, add them before this.
@@ -1117,6 +1124,65 @@ long IRrecv::decodeSAMSUNG(decode_results *results) {
   return DECODED;
 }
 
+/**
+ * Aiwa system
+ * Remote control RC-T501
+ * Lirc file http://lirc.sourceforge.net/remotes/aiwa/RC-T501 
+ *
+ */
+long IRrecv::decodeAiwaRCT501(decode_results *results) {
+  int data = 0;
+  int offset = 1; // skip first garbage read
+
+  // Check SIZE
+  if(irparams.rawlen < 2 * (AIWA_RC_T501_SUM_BITS) + 4) {
+    return ERR;
+  }
+  
+  // Check HDR
+  if(!MATCH_MARK(results->rawbuf[offset], AIWA_RC_T501_HDR_MARK)) {
+    return ERR;
+  }
+  offset++;
+
+  // Check HDR space
+  if(!MATCH_SPACE(results->rawbuf[offset], AIWA_RC_T501_HDR_SPACE)) {
+    return ERR;
+  }
+  offset++;
+
+  offset += 26; // skip pre-data - optional
+  while(offset < irparams.rawlen - 4) {
+    if(MATCH_MARK(results->rawbuf[offset], AIWA_RC_T501_BIT_MARK)) {
+      offset++;
+    } 
+    else {
+      return ERR;
+    }
+    
+    // ONE & ZERO
+    if(MATCH_SPACE(results->rawbuf[offset], AIWA_RC_T501_ONE_SPACE)) {
+      data = (data << 1) | 1;
+    } 
+    else if(MATCH_SPACE(results->rawbuf[offset], AIWA_RC_T501_ZERO_SPACE)) {
+      data <<= 1;
+    } 
+    else {
+      // End of one & zero detected
+      break;
+    }
+    offset++;
+  }
+  
+  results->bits = (offset - 1) / 2;
+  if(results->bits < 42) {
+    return ERR;
+  }
+  results->value = data;
+  results->decode_type = AIWA_RC_T501;
+  return DECODED;
+}
+
 /* -----------------------------------------------------------------------
  * hashdecode - decode an arbitrary IR code.
  * Instead of decoding using a standard encoding scheme
@@ -1239,3 +1305,53 @@ void IRsend::sendDISH(unsigned long data, int nbits) {
     data <<= 1;
   }
 }
+
+/**
+ * Aiwa system
+ * Remote control RC-T501
+ * Lirc file http://lirc.sourceforge.net/remotes/aiwa/RC-T501 
+ *
+ */
+void IRsend::sendAiwaRCT501(int code) {
+  // PRE-DATA, 26 bits, 0x227EEC0
+  long int pre = 0x227EEC0;
+  int i;
+  
+  enableIROut(AIWA_RC_T501_HZ);
+  
+  // HDR mark + HDR space
+  mark(AIWA_RC_T501_HDR_MARK);
+  space(AIWA_RC_T501_HDR_SPACE);
+
+  // Skip leading zero's
+  pre <<= 6;
+  // Send pre-data
+  for(i=0; i < 26; i++) {
+    mark(AIWA_RC_T501_BIT_MARK);
+    if(pre & TOPBIT) {
+      space(AIWA_RC_T501_ONE_SPACE);
+    } else {
+      space(AIWA_RC_T501_ZERO_SPACE);
+    }
+    pre <<= 1;
+  }
+
+  // Skip firts code bit
+  code <<= 1;
+  // Send code
+  for(i=0; i < 15; i++) {
+    mark(AIWA_RC_T501_BIT_MARK);
+    if(code & TOPBIT) {
+      space(AIWA_RC_T501_ONE_SPACE);
+    } else {
+      space(AIWA_RC_T501_ZERO_SPACE);
+    }
+    code <<= 1;
+  }
+  // POST-DATA, 1 bit, 0x0
+  mark(AIWA_RC_T501_BIT_MARK);
+  space(AIWA_RC_T501_ZERO_SPACE);
+
+  mark(AIWA_RC_T501_BIT_MARK);
+  space(0);
+}