Infrared remote library for Arduino: send and receive infrared signals with multiple protocols Port from Arduino-IRremote https://github.com/z3t0/Arduino-IRremote
Diff: ir_NEC.cpp
- Revision:
- 0:70c8e56bac45
- Child:
- 8:0650578366fd
--- /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