ir_LG.cpp

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#include "IRremote.h"
 
//==============================================================================
//                               L       GGGG
//                               L      G
//                               L      G  GG
//                               L      G   G
//                               LLLLL   GGG
//==============================================================================
 
#define LG_BITS 28
 
#define LG_HDR_MARK 8000
#define LG_HDR_SPACE 4000
#define LG_BIT_MARK 600
#define LG_ONE_SPACE 1600
#define LG_ZERO_SPACE 550
#define LG_RPT_LENGTH 60000
 
//+=============================================================================
#if DECODE_LG
bool IRrecv::decodeLG(decode_results *results) {
    long data = 0;
    int offset = 1; // Skip first space
 
    // Check we have the right amount of data
    if (irparams.rawlen < (2 * LG_BITS) + 1)
        return false;
 
    // Initial mark/space
    if (!MATCH_MARK(results->rawbuf[offset], LG_HDR_MARK)) {
        return false;
    }
    offset++;
 
    if (!MATCH_SPACE(results->rawbuf[offset], LG_HDR_SPACE)) {
        return false;
    }
    offset++;
 
    for (int i = 0; i < LG_BITS; i++) {
        if (!MATCH_MARK(results->rawbuf[offset], LG_BIT_MARK)) {
            return false;
        }
        offset++;
 
        if (MATCH_SPACE(results->rawbuf[offset], LG_ONE_SPACE)) {
            data = (data << 1) | 1;
        } else if (MATCH_SPACE(results->rawbuf[offset], LG_ZERO_SPACE)) {
            data = (data << 1) | 0;
        } else {
            return false;
        }
        offset++;
    }
 
    // Stop bit
    if (!MATCH_MARK(results->rawbuf[offset], LG_BIT_MARK)) {
        return false;
    }
 
    // Success
    results->bits = LG_BITS;
    results->value = data;
    results->decode_type = LG;
    return true;
}
#endif
 
//+=============================================================================
#if SEND_LG
void IRsend::sendLG(unsigned long data, int nbits) {
    // Set IR carrier frequency
    enableIROut(38);
 
    // Header
    mark(LG_HDR_MARK);
    space(LG_HDR_SPACE);
    mark(LG_BIT_MARK);
 
    // Data
    for (unsigned long mask = 1UL << (nbits - 1); mask; mask >>= 1) {
        if (data & mask) {
            space(LG_ONE_SPACE);
            mark(LG_BIT_MARK);
        } else {
            space(LG_ZERO_SPACE);
            mark(LG_BIT_MARK);
        }
    }
    space(0);  // Always end with the LED off
}
#endif