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fix bug in st detect +

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adjust nrz t55xx detection to reduce false positives on weak antennas
adjust t55xx read wait to get past initial startup wave.
This commit is contained in:
marshmellow42 2017-04-04 17:22:21 -04:00
commit bf85d22f96
4 changed files with 9 additions and 5 deletions
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4
common/lfdemod.c
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@ -548,7 +548,7 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock, size_t *clockStartIdx
//get high and low peak
int peak, low;
if (getHiLo(dest, loopCnt, &peak, &low, 85, 85) < 1) return 0;
if (getHiLo(dest, loopCnt, &peak, &low, 90, 90) < 1) return 0;
int lowestTransition = DetectStrongNRZClk(dest, size-20, peak, low);
size_t ii;
@ -958,6 +958,8 @@ uint8_t detectFSKClk(uint8_t *BitStream, size_t size, uint8_t fcHigh, uint8_t fc
// look for Sequence Terminator - should be pulses of clk*(1 or 2), clk*2, clk*(1.5 or 2), by idx we mean graph position index...
bool findST(int *stStopLoc, int *stStartIdx, int lowToLowWaveLen[], int highToLowWaveLen[], int clk, int tol, int buffSize, size_t *i) {
if (buffSize < *i+4) return false;
for (; *i < buffSize - 4; *i+=1) {
*stStartIdx += lowToLowWaveLen[*i]; //caution part of this wave may be data and part may be ST.... to be accounted for in main function for now...
if (lowToLowWaveLen[*i] >= clk*1-tol && lowToLowWaveLen[*i] <= (clk*2)+tol && highToLowWaveLen[*i] < clk+tol) { //1 to 2 clocks depending on 2 bits prior