Diff: ir_NEC.cpp

Revision:

0:70c8e56bac45

diff -r 000000000000 -r 70c8e56bac45 ir_NEC.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ir_NEC.cpp	Sat Jan 23 06:16:48 2016 +0000
@@ -0,0 +1,98 @@
+#include "IRremote.h"
+#include "IRremoteInt.h"
+
+//==============================================================================
+//                           N   N  EEEEE   CCCC
+//                           NN  N  E      C
+//                           N N N  EEE    C
+//                           N  NN  E      C
+//                           N   N  EEEEE   CCCC
+//==============================================================================
+
+#define NEC_BITS          32
+#define NEC_HDR_MARK    9000
+#define NEC_HDR_SPACE   4500
+#define NEC_BIT_MARK     560
+#define NEC_ONE_SPACE   1690
+#define NEC_ZERO_SPACE   560
+#define NEC_RPT_SPACE   2250
+
+//+=============================================================================
+#if SEND_NEC
+void  IRsend::sendNEC (unsigned long data,  int nbits)
+{
+	// Set IR carrier frequency
+	enableIROut(38);
+
+	// Header
+	mark(NEC_HDR_MARK);
+	space(NEC_HDR_SPACE);
+
+	// Data
+	for (unsigned long  mask = 1UL << (nbits - 1);  mask;  mask >>= 1) {
+		if (data & mask) {
+			mark(NEC_BIT_MARK);
+			space(NEC_ONE_SPACE);
+		} else {
+			mark(NEC_BIT_MARK);
+			space(NEC_ZERO_SPACE);
+		}
+	}
+
+	// Footer
+	mark(NEC_BIT_MARK);
+	space(0);  // Always end with the LED off
+}
+#endif
+
+//+=============================================================================
+// NECs have a repeat only 4 items long
+//
+#if DECODE_NEC
+bool  IRrecv::decodeNEC (decode_results *results)
+{
+	long  data   = 0;  // We decode in to here; Start with nothing
+	int   offset = 1;  // Index in to results; Skip first entry!?
+
+	// Check header "mark"
+	if (!MATCH_MARK(results->rawbuf[offset], NEC_HDR_MARK))  return false ;
+	offset++;
+
+	// Check for repeat
+	if ( (irparams.rawlen == 4)
+	    && MATCH_SPACE(results->rawbuf[offset  ], NEC_RPT_SPACE)
+	    && MATCH_MARK (results->rawbuf[offset+1], NEC_BIT_MARK )
+	   ) {
+		results->bits        = 0;
+		results->value       = REPEAT;
+		results->decode_type = NEC;
+		return true;
+	}
+
+	// Check we have enough data
+	if (irparams.rawlen < (2 * NEC_BITS) + 4)  return false ;
+
+	// Check header "space"
+	if (!MATCH_SPACE(results->rawbuf[offset], NEC_HDR_SPACE))  return false ;
+	offset++;
+
+	// Build the data
+	for (int i = 0;  i < NEC_BITS;  i++) {
+		// Check data "mark"
+		if (!MATCH_MARK(results->rawbuf[offset], NEC_BIT_MARK))  return false ;
+		offset++;
+        // Suppend this bit
+		if      (MATCH_SPACE(results->rawbuf[offset], NEC_ONE_SPACE ))  data = (data << 1) | 1 ;
+		else if (MATCH_SPACE(results->rawbuf[offset], NEC_ZERO_SPACE))  data = (data << 1) | 0 ;
+		else                                                            return false ;
+		offset++;
+	}
+
+	// Success
+	results->bits        = NEC_BITS;
+	results->value       = data;
+	results->decode_type = NEC;
+
+	return true;
+}
+#endif