- int high, low, ans;
- ans = getHiLo(BinStream, initLoopMax, &high, &low, 75, 75);
- if (ans<1) return -2; //just noise
-
- // PrintAndLog("DEBUG - valid high: %d - valid low: %d",high,low);
- int lastBit = 0; //set first clock check
- uint32_t bitnum = 0; //output counter
- int tol = 0; //clock tolerance adjust - waves will be accepted as within the clock if they fall + or - this value + clock from last valid wave
- if (*clk<=32) tol=1; //clock tolerance may not be needed anymore currently set to + or - 1 but could be increased for poor waves or removed entirely
- int iii = 0;
- uint32_t gLen = *size;
- if (gLen > 3000) gLen=3000;
- //if 0 errors allowed then only try first 2 clock cycles as we want a low tolerance
- if (!maxErr) gLen=*clk*2;
- uint8_t errCnt =0;
- uint16_t MaxBits = 500;
- uint32_t bestStart = *size;
- int bestErrCnt = maxErr+1;
- // PrintAndLog("DEBUG - lastbit - %d",lastBit);
- // loop to find first wave that works
- for (iii=0; iii < gLen; ++iii){
- if ((BinStream[iii] >= high) || (BinStream[iii] <= low)){
- lastBit=iii-*clk;
- errCnt=0;
- // loop through to see if this start location works
- for (i = iii; i < *size; ++i) {
- if ((BinStream[i] >= high) && ((i-lastBit) > (*clk-tol))){
- lastBit+=*clk;
- } else if ((BinStream[i] <= low) && ((i-lastBit) > (*clk-tol))){
- //low found and we are expecting a bar
- lastBit+=*clk;
- } else {
- //mid value found or no bar supposed to be here
- if ((i-lastBit)>(*clk+tol)){
- //should have hit a high or low based on clock!!
-
- //debug
- //PrintAndLog("DEBUG - no wave in expected area - location: %d, expected: %d-%d, lastBit: %d - resetting search",i,(lastBit+(clk-((int)(tol)))),(lastBit+(clk+((int)(tol)))),lastBit);