Joshua Marshall / IRremote

Infrared remote library for Arduino: send and receive infrared signals with multiple protocols Port from Arduino-IRremote https://github.com/z3t0/Arduino-IRremote

ir_NEC.cpp@8:629ef37f2853, 2019-09-25 (annotated)

Committer:
JRM1986
Date:
Wed Sep 25 13:20:19 2019 +0000
Revision:
8:629ef37f2853
Parent:
0:70c8e56bac45 
Remote Control Decoded - recieving codes from module;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yuhki50 0:70c8e56bac45 1 #include "IRremote.h"
yuhki50 0:70c8e56bac45 2 #include "IRremoteInt.h"
yuhki50 0:70c8e56bac45 3
yuhki50 0:70c8e56bac45 4 //==============================================================================
yuhki50 0:70c8e56bac45 5 // N N EEEEE CCCC
yuhki50 0:70c8e56bac45 6 // NN N E C
yuhki50 0:70c8e56bac45 7 // N N N EEE C
yuhki50 0:70c8e56bac45 8 // N NN E C
yuhki50 0:70c8e56bac45 9 // N N EEEEE CCCC
yuhki50 0:70c8e56bac45 10 //==============================================================================
yuhki50 0:70c8e56bac45 11
yuhki50 0:70c8e56bac45 12 #define NEC_BITS 32
yuhki50 0:70c8e56bac45 13 #define NEC_HDR_MARK 9000
yuhki50 0:70c8e56bac45 14 #define NEC_HDR_SPACE 4500
yuhki50 0:70c8e56bac45 15 #define NEC_BIT_MARK 560
yuhki50 0:70c8e56bac45 16 #define NEC_ONE_SPACE 1690
yuhki50 0:70c8e56bac45 17 #define NEC_ZERO_SPACE 560
yuhki50 0:70c8e56bac45 18 #define NEC_RPT_SPACE 2250
yuhki50 0:70c8e56bac45 19
yuhki50 0:70c8e56bac45 20 //+=============================================================================
yuhki50 0:70c8e56bac45 21 #if SEND_NEC
yuhki50 0:70c8e56bac45 22 void IRsend::sendNEC (unsigned long data, int nbits)
yuhki50 0:70c8e56bac45 23 {
yuhki50 0:70c8e56bac45 24 // Set IR carrier frequency
yuhki50 0:70c8e56bac45 25 enableIROut(38);
yuhki50 0:70c8e56bac45 26
yuhki50 0:70c8e56bac45 27 // Header
yuhki50 0:70c8e56bac45 28 mark(NEC_HDR_MARK);
yuhki50 0:70c8e56bac45 29 space(NEC_HDR_SPACE);
yuhki50 0:70c8e56bac45 30
yuhki50 0:70c8e56bac45 31 // Data
yuhki50 0:70c8e56bac45 32 for (unsigned long mask = 1UL << (nbits - 1); mask; mask >>= 1) {
yuhki50 0:70c8e56bac45 33 if (data & mask) {
yuhki50 0:70c8e56bac45 34 mark(NEC_BIT_MARK);
yuhki50 0:70c8e56bac45 35 space(NEC_ONE_SPACE);
yuhki50 0:70c8e56bac45 36 } else {
yuhki50 0:70c8e56bac45 37 mark(NEC_BIT_MARK);
yuhki50 0:70c8e56bac45 38 space(NEC_ZERO_SPACE);
yuhki50 0:70c8e56bac45 39 }
yuhki50 0:70c8e56bac45 40 }
yuhki50 0:70c8e56bac45 41
yuhki50 0:70c8e56bac45 42 // Footer
yuhki50 0:70c8e56bac45 43 mark(NEC_BIT_MARK);
yuhki50 0:70c8e56bac45 44 space(0); // Always end with the LED off
yuhki50 0:70c8e56bac45 45 }
yuhki50 0:70c8e56bac45 46 #endif
yuhki50 0:70c8e56bac45 47
yuhki50 0:70c8e56bac45 48 //+=============================================================================
yuhki50 0:70c8e56bac45 49 // NECs have a repeat only 4 items long
yuhki50 0:70c8e56bac45 50 //
yuhki50 0:70c8e56bac45 51 #if DECODE_NEC
yuhki50 0:70c8e56bac45 52 bool IRrecv::decodeNEC (decode_results *results)
yuhki50 0:70c8e56bac45 53 {
yuhki50 0:70c8e56bac45 54 long data = 0; // We decode in to here; Start with nothing
yuhki50 0:70c8e56bac45 55 int offset = 1; // Index in to results; Skip first entry!?
yuhki50 0:70c8e56bac45 56
yuhki50 0:70c8e56bac45 57 // Check header "mark"
yuhki50 0:70c8e56bac45 58 if (!MATCH_MARK(results->rawbuf[offset], NEC_HDR_MARK)) return false ;
yuhki50 0:70c8e56bac45 59 offset++;
yuhki50 0:70c8e56bac45 60
yuhki50 0:70c8e56bac45 61 // Check for repeat
yuhki50 0:70c8e56bac45 62 if ( (irparams.rawlen == 4)
yuhki50 0:70c8e56bac45 63 && MATCH_SPACE(results->rawbuf[offset ], NEC_RPT_SPACE)
yuhki50 0:70c8e56bac45 64 && MATCH_MARK (results->rawbuf[offset+1], NEC_BIT_MARK )
yuhki50 0:70c8e56bac45 65 ) {
yuhki50 0:70c8e56bac45 66 results->bits = 0;
yuhki50 0:70c8e56bac45 67 results->value = REPEAT;
yuhki50 0:70c8e56bac45 68 results->decode_type = NEC;
yuhki50 0:70c8e56bac45 69 return true;
yuhki50 0:70c8e56bac45 70 }
yuhki50 0:70c8e56bac45 71
yuhki50 0:70c8e56bac45 72 // Check we have enough data
yuhki50 0:70c8e56bac45 73 if (irparams.rawlen < (2 * NEC_BITS) + 4) return false ;
yuhki50 0:70c8e56bac45 74
yuhki50 0:70c8e56bac45 75 // Check header "space"
yuhki50 0:70c8e56bac45 76 if (!MATCH_SPACE(results->rawbuf[offset], NEC_HDR_SPACE)) return false ;
yuhki50 0:70c8e56bac45 77 offset++;
yuhki50 0:70c8e56bac45 78
yuhki50 0:70c8e56bac45 79 // Build the data
yuhki50 0:70c8e56bac45 80 for (int i = 0; i < NEC_BITS; i++) {
yuhki50 0:70c8e56bac45 81 // Check data "mark"
yuhki50 0:70c8e56bac45 82 if (!MATCH_MARK(results->rawbuf[offset], NEC_BIT_MARK)) return false ;
yuhki50 0:70c8e56bac45 83 offset++;
yuhki50 0:70c8e56bac45 84 // Suppend this bit
yuhki50 0:70c8e56bac45 85 if (MATCH_SPACE(results->rawbuf[offset], NEC_ONE_SPACE )) data = (data << 1) | 1 ;
yuhki50 0:70c8e56bac45 86 else if (MATCH_SPACE(results->rawbuf[offset], NEC_ZERO_SPACE)) data = (data << 1) | 0 ;
yuhki50 0:70c8e56bac45 87 else return false ;
yuhki50 0:70c8e56bac45 88 offset++;
yuhki50 0:70c8e56bac45 89 }
yuhki50 0:70c8e56bac45 90
yuhki50 0:70c8e56bac45 91 // Success
yuhki50 0:70c8e56bac45 92 results->bits = NEC_BITS;
yuhki50 0:70c8e56bac45 93 results->value = data;
yuhki50 0:70c8e56bac45 94 results->decode_type = NEC;
yuhki50 0:70c8e56bac45 95
yuhki50 0:70c8e56bac45 96 return true;
yuhki50 0:70c8e56bac45 97 }
yuhki50 0:70c8e56bac45 98 #endif