mirror of
https://github.com/Proxmark/proxmark3.git
synced 2025-08-14 10:36:58 -07:00
lf t55xx and some lf demod fixes/adjustments
finally think I like the lf t55xx detect and read cmds. pretty reliable now.
This commit is contained in:
marshmellow42
parent
f665067919
commit
db8296025f
6 changed files with 230 additions and 210 deletions
335
common/lfdemod.c
335
common/lfdemod.c
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@ -407,12 +407,12 @@ size_t fsk_wave_demod(uint8_t * dest, size_t size, uint8_t fchigh, uint8_t fclow
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if (currSample < (fclow-2)){ //0-5 = garbage noise
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//do nothing with extra garbage
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} else if (currSample < (fchigh-1)) { //6-8 = 8 sample waves
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if (LastSample > (fchigh-2) && preLastSample < (fchigh-1)){
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if (LastSample > (fchigh-2) && (preLastSample < (fchigh-1) || preLastSample == 0 )){
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dest[numBits-1]=1; //correct last 9 wave surrounded by 8 waves
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}
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dest[numBits++]=1;
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} else if (currSample > (fchigh+1) && !numBits) { //12 + and first bit = garbage
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} else if (currSample > (fchigh) && !numBits) { //12 + and first bit = garbage
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//do nothing with beginning garbage
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} else if (currSample == (fclow+1) && LastSample == (fclow-1)) { // had a 7 then a 9 should be two 8's
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dest[numBits++]=1;
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@ -439,12 +439,16 @@ size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen,
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//if lastval was 1, we have a 1->0 crossing
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if (dest[idx-1]==1) {
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if (!numBits && n < rfLen/fclow) {
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n=0;
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lastval = dest[idx];
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continue;
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if (!numBits) {
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if (n < rfLen/fclow) {
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n=0;
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lastval = dest[idx];
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continue;
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}
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n = (n * fclow + rfLen/4) / rfLen;
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} else {
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n = (n * fclow + rfLen/2) / rfLen;
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}
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n = (n * fclow + rfLen/2) / rfLen;
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} else {// 0->1 crossing
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//test first bitsample too small
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if (!numBits && n < rfLen/fchigh) {
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@ -703,15 +707,26 @@ int PyramiddemodFSK(uint8_t *dest, size_t *size)
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return (int)startIdx;
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}
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/*
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void dummy(char *fmt, ...){}
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#ifndef ON_DEVICE
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#include "ui.h"
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#define prnt PrintAndLog
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#else
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#define prnt dummy
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#endif
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*/
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// by marshmellow
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// to detect a wave that has heavily clipped (clean) samples
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uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
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{
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uint16_t allPeaks=1;
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uint16_t cntPeaks=0;
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size_t loopEnd = 512+60;
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size_t loopEnd = 512+160;
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if (loopEnd > size) loopEnd = size;
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for (size_t i=60; i<loopEnd; i++){
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for (size_t i=160; i<loopEnd; i++){
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if (dest[i]>low && dest[i]<high)
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allPeaks=0;
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else
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@ -722,7 +737,6 @@ uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t lo
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}
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return allPeaks;
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}
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// by marshmellow
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// to help detect clocks on heavily clipped samples
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// based on count of low to low
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@ -730,7 +744,7 @@ int DetectStrongAskClock(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
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{
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uint8_t fndClk[] = {8,16,32,40,50,64,128};
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size_t startwave;
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size_t i = 0;
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size_t i = 100;
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size_t minClk = 255;
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// get to first full low to prime loop and skip incomplete first pulse
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while ((dest[i] < high) && (i < size))
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@ -753,6 +767,7 @@ int DetectStrongAskClock(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
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minClk = i - startwave;
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}
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// set clock
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//prnt("minClk: %d",minClk);
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for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
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if (minClk >= fndClk[clkCnt]-(fndClk[clkCnt]/8) && minClk <= fndClk[clkCnt]+1)
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return fndClk[clkCnt];
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@ -770,8 +785,8 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
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uint8_t clk[] = {255,8,16,32,40,50,64,100,128,255};
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uint8_t clkEnd = 9;
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uint8_t loopCnt = 255; //don't need to loop through entire array...
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if (size <= loopCnt) return -1; //not enough samples
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if (size <= loopCnt+60) return -1; //not enough samples
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size -= 60; //sometimes there is a strange end wave - filter out this....
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//if we already have a valid clock
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uint8_t clockFnd=0;
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for (;i<clkEnd;++i)
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@ -796,7 +811,6 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
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}
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}
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}
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uint8_t ii;
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uint8_t clkCnt, tol = 0;
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uint16_t bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000,1000};
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@ -838,7 +852,7 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
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}
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//if we found no errors then we can stop here and a low clock (common clocks)
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// this is correct one - return this clock
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//PrintAndLog("DEBUG: clk %d, err %d, ii %d, i %d",clk[clkCnt],errCnt,ii,i);
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//prnt("DEBUG: clk %d, err %d, ii %d, i %d",clk[clkCnt],errCnt,ii,i);
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if(errCnt==0 && clkCnt<7) {
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if (!clockFnd) *clock = clk[clkCnt];
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return ii;
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@ -874,7 +888,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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uint8_t clk[]={255,16,32,40,50,64,100,128,255}; //255 is not a valid clock
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uint16_t loopCnt = 4096; //don't need to loop through entire array...
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if (size == 0) return 0;
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if (size<loopCnt) loopCnt = size;
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if (size<loopCnt) loopCnt = size-20;
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//if we already have a valid clock quit
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size_t i=1;
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@ -888,17 +902,17 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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uint16_t peaksdet[]={0,0,0,0,0,0,0,0,0};
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fc = countFC(dest, size, 0);
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if (fc!=2 && fc!=4 && fc!=8) return -1;
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//PrintAndLog("DEBUG: FC: %d",fc);
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//prnt("DEBUG: FC: %d",fc);
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//find first full wave
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for (i=0; i<loopCnt; i++){
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for (i=160; i<loopCnt; i++){
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if (dest[i] < dest[i+1] && dest[i+1] >= dest[i+2]){
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if (waveStart == 0) {
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waveStart = i+1;
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//PrintAndLog("DEBUG: waveStart: %d",waveStart);
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//prnt("DEBUG: waveStart: %d",waveStart);
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} else {
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waveEnd = i+1;
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//PrintAndLog("DEBUG: waveEnd: %d",waveEnd);
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//prnt("DEBUG: waveEnd: %d",waveEnd);
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waveLenCnt = waveEnd-waveStart;
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if (waveLenCnt > fc){
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firstFullWave = waveStart;
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@ -909,7 +923,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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}
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}
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}
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//PrintAndLog("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
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//prnt("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
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//test each valid clock from greatest to smallest to see which lines up
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for(clkCnt=7; clkCnt >= 1 ; clkCnt--){
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@ -917,7 +931,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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waveStart = 0;
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errCnt=0;
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peakcnt=0;
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//PrintAndLog("DEBUG: clk: %d, lastClkBit: %d",clk[clkCnt],lastClkBit);
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//prnt("DEBUG: clk: %d, lastClkBit: %d",clk[clkCnt],lastClkBit);
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for (i = firstFullWave+fullWaveLen-1; i < loopCnt-2; i++){
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//top edge of wave = start of new wave
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@ -930,7 +944,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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waveLenCnt = waveEnd-waveStart;
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if (waveLenCnt > fc){
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//if this wave is a phase shift
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//PrintAndLog("DEBUG: phase shift at: %d, len: %d, nextClk: %d, ii: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+clk[clkCnt]-tol,ii+1,fc);
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//prnt("DEBUG: phase shift at: %d, len: %d, nextClk: %d, ii: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+clk[clkCnt]-tol,ii+1,fc);
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if (i+1 >= lastClkBit + clk[clkCnt] - tol){ //should be a clock bit
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peakcnt++;
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lastClkBit+=clk[clkCnt];
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@ -959,11 +973,50 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
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if (peaksdet[i] > peaksdet[best]) {
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best = i;
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}
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//PrintAndLog("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
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//prnt("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
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}
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return clk[best];
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}
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int DetectStrongNRZClk(uint8_t *dest, size_t size, int peak, int low){
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//find shortest transition from high to low
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size_t i = 0;
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size_t transition1 = 0;
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int lowestTransition = 255;
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uint8_t lastWasHigh=0;
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//find first valid beginning of a high/low wave
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if (dest[i] >= peak) {
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for (; i < size; i++) {
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if (dest[i] <= low) break;
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}
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lastWasHigh=0;
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} else if (dest[i] <= low) {
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for (; i < size; i++) {
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if (dest[i] >= peak) break;
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}
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lastWasHigh=1;
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} else {
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for (; i < size; i++) {
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if (dest[i] >= peak || dest[i] <= low) {
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lastWasHigh = (dest[i] >= peak);
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break;
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}
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}
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}
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if (i==size) return 0;
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transition1 = i;
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for (;i < size; i++) {
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if ((dest[i] >= peak && !lastWasHigh) || (dest[i] <= low && lastWasHigh)) {
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lastWasHigh = (dest[i] >= peak);
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if (i-transition1 < lowestTransition) lowestTransition = i-transition1;
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transition1 = i;
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}
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}
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if (lowestTransition == 255) lowestTransition = 0;
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return lowestTransition;
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}
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//by marshmellow
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//detect nrz clock by reading #peaks vs no peaks(or errors)
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int DetectNRZClock(uint8_t dest[], size_t size, int clock)
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@ -972,8 +1025,7 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
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uint8_t clk[]={8,16,32,40,50,64,100,128,255};
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size_t loopCnt = 4096; //don't need to loop through entire array...
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if (size == 0) return 0;
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if (size<loopCnt) loopCnt = size;
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if (size<loopCnt) loopCnt = size-20;
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//if we already have a valid clock quit
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for (; i < 8; ++i)
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if (clk[i] == clock) return clock;
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@ -982,38 +1034,80 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
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int peak, low;
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if (getHiLo(dest, loopCnt, &peak, &low, 75, 75) < 1) return 0;
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//PrintAndLog("DEBUG: peak: %d, low: %d",peak,low);
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int lowestTransition = DetectStrongNRZClk(dest, size-20, peak, low);
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//prnt("DEBUG: peak: %d, low: %d",peak,low);
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size_t ii;
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uint8_t clkCnt;
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uint8_t tol = 0;
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uint16_t peakcnt=0;
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uint16_t peaksdet[]={0,0,0,0,0,0,0,0};
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uint16_t maxPeak=0;
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uint16_t smplCnt = 0;
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int16_t peakcnt = 0;
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int16_t peaksdet[] = {0,0,0,0,0,0,0,0};
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uint16_t maxPeak = 255;
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uint8_t firstpeak = 0;
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//test for large clipped waves
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for (i=0; i<loopCnt; i++){
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if (dest[i] >= peak || dest[i] <= low){
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peakcnt++;
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if (!firstpeak) continue;
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smplCnt++;
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} else {
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if (peakcnt>0 && maxPeak < peakcnt){
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maxPeak = peakcnt;
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firstpeak=1;
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if (smplCnt > 6 ){
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if (maxPeak > smplCnt){
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maxPeak = smplCnt;
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//prnt("maxPk: %d",maxPeak);
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}
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peakcnt++;
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//prnt("maxPk: %d, smplCnt: %d, peakcnt: %d",maxPeak,smplCnt,peakcnt);
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smplCnt=0;
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}
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peakcnt=0;
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}
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}
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uint8_t samePeak=0;
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uint8_t errBitHigh=0;
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peakcnt=0;
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//test each valid clock from smallest to greatest to see which lines up
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for(clkCnt=0; clkCnt < 8; ++clkCnt){
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//ignore clocks smaller than largest peak
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if (clk[clkCnt]<maxPeak) continue;
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//ignore clocks smaller than smallest peak
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if (clk[clkCnt] < maxPeak - (clk[clkCnt]/4)) continue;
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//try lining up the peaks by moving starting point (try first 256)
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for (ii=0; ii< loopCnt; ++ii){
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for (ii=20; ii < loopCnt; ++ii){
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if ((dest[ii] >= peak) || (dest[ii] <= low)){
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peakcnt=0;
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// now that we have the first one lined up test rest of wave array
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for (i=0; i < ((int)((size-ii-tol)/clk[clkCnt])-1); ++i){
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if (dest[ii+(i*clk[clkCnt])]>=peak || dest[ii+(i*clk[clkCnt])]<=low){
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peakcnt++;
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uint8_t bitHigh =0;
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uint8_t ignoreCnt = 0;
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uint8_t ignoreWindow = 4;
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int lastBit = ii-clk[clkCnt];
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//loop through to see if this start location works
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for (i = ii; i < size-20; ++i) {
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// if we are at a clock bit
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if ((i >= lastBit + clk[clkCnt] - tol) && (i <= lastBit + clk[clkCnt] + tol)) {
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//test high/low
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if (dest[i] >= peak || dest[i] <= low) {
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if (samePeak) peakcnt--;
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bitHigh=1;
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peakcnt++;
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errBitHigh = 0;
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ignoreCnt = ignoreWindow;
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lastBit += clk[clkCnt];
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samePeak = 1;
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} else if (i == lastBit + clk[clkCnt] + tol) {
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lastBit += clk[clkCnt];
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samePeak = 0;
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}
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//else if not a clock bit and no peaks
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} else if (dest[i] < peak && dest[i] > low){
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samePeak = 0;
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if (ignoreCnt==0){
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bitHigh=0;
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if (errBitHigh==1) peakcnt--;
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errBitHigh=0;
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} else {
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ignoreCnt--;
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}
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// else if not a clock bit but we have a peak
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} else if ((dest[i]>=peak || dest[i]<=low) && (bitHigh==0)) {
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//error bar found no clock...
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errBitHigh=1;
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}
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}
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if(peakcnt>peaksdet[clkCnt]) {
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@ -1027,9 +1121,14 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
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for (iii=7; iii > 0; iii--){
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if (peaksdet[iii] > peaksdet[best]){
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best = iii;
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} else if (peaksdet[iii] == peaksdet[best] && lowestTransition){
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if (clk[iii] > (lowestTransition - (clk[iii]/8)) && clk[iii] < (lowestTransition + (clk[iii]/8))){
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best = iii;
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}
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}
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//PrintAndLog("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
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//prnt("DEBUG: Clk: %d, peaks: %d, maxPeak: %d, bestClk: %d, lowestTrs: %d",clk[iii],peaksdet[iii],maxPeak, clk[best], lowestTransition);
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}
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return clk[best];
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}
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@ -1089,123 +1188,37 @@ int indala26decode(uint8_t *bitStream, size_t *size, uint8_t *invert)
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return (int) startidx;
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}
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// by marshmellow - demodulate NRZ wave (both similar enough)
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// by marshmellow - demodulate NRZ wave
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// peaks invert bit (high=1 low=0) each clock cycle = 1 bit determined by last peak
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// there probably is a much simpler way to do this....
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int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert, int maxErr)
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{
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int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert){
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if (justNoise(dest, *size)) return -1;
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*clk = DetectNRZClock(dest, *size, *clk);
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if (*clk==0) return -2;
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size_t i, gLen = 4096;
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if (gLen>*size) gLen = *size;
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if (gLen>*size) gLen = *size-20;
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int high, low;
|
||||
if (getHiLo(dest, gLen, &high, &low, 75, 75) < 1) return -3; //25% fuzz on high 25% fuzz on low
|
||||
int lastBit = 0; //set first clock check
|
||||
size_t iii = 0, bitnum = 0; //bitnum counter
|
||||
uint16_t errCnt = 0, MaxBits = 1000;
|
||||
size_t bestErrCnt = maxErr+1;
|
||||
size_t bestPeakCnt = 0, bestPeakStart = 0;
|
||||
uint8_t bestFirstPeakHigh=0, firstPeakHigh=0, curBit=0, bitHigh=0, errBitHigh=0;
|
||||
uint8_t tol = 1; //clock tolerance adjust - waves will be accepted as within the clock if they fall + or - this value + clock from last valid wave
|
||||
uint16_t peakCnt=0;
|
||||
uint8_t ignoreWindow=4;
|
||||
uint8_t ignoreCnt=ignoreWindow; //in case of noise near peak
|
||||
//loop to find first wave that works - align to clock
|
||||
for (iii=0; iii < gLen; ++iii){
|
||||
if ((dest[iii]>=high) || (dest[iii]<=low)){
|
||||
if (dest[iii]>=high) firstPeakHigh=1;
|
||||
else firstPeakHigh=0;
|
||||
lastBit=iii-*clk;
|
||||
peakCnt=0;
|
||||
errCnt=0;
|
||||
//loop through to see if this start location works
|
||||
for (i = iii; i < *size; ++i) {
|
||||
// if we are at a clock bit
|
||||
if ((i >= lastBit + *clk - tol) && (i <= lastBit + *clk + tol)) {
|
||||
//test high/low
|
||||
if (dest[i] >= high || dest[i] <= low) {
|
||||
bitHigh = 1;
|
||||
peakCnt++;
|
||||
errBitHigh = 0;
|
||||
ignoreCnt = ignoreWindow;
|
||||
lastBit += *clk;
|
||||
} else if (i == lastBit + *clk + tol) {
|
||||
lastBit += *clk;
|
||||
}
|
||||
//else if no bars found
|
||||
} else if (dest[i] < high && dest[i] > low){
|
||||
if (ignoreCnt==0){
|
||||
bitHigh=0;
|
||||
if (errBitHigh==1) errCnt++;
|
||||
errBitHigh=0;
|
||||
} else {
|
||||
ignoreCnt--;
|
||||
}
|
||||
} else if ((dest[i]>=high || dest[i]<=low) && (bitHigh==0)) {
|
||||
//error bar found no clock...
|
||||
errBitHigh=1;
|
||||
}
|
||||
if (((i-iii) / *clk)>=MaxBits) break;
|
||||
}
|
||||
//we got more than 64 good bits and not all errors
|
||||
if (((i-iii) / *clk) > 64 && (errCnt <= (maxErr))) {
|
||||
//possible good read
|
||||
if (!errCnt || peakCnt > bestPeakCnt){
|
||||
bestFirstPeakHigh=firstPeakHigh;
|
||||
bestErrCnt = errCnt;
|
||||
bestPeakCnt = peakCnt;
|
||||
bestPeakStart = iii;
|
||||
if (!errCnt) break; //great read - finish
|
||||
}
|
||||
}
|
||||
|
||||
uint8_t bit=0;
|
||||
//convert wave samples to 1's and 0's
|
||||
for(i=20; i < *size-20; i++){
|
||||
if (dest[i] >= high) bit = 1;
|
||||
if (dest[i] <= low) bit = 0;
|
||||
dest[i] = bit;
|
||||
}
|
||||
//now demod based on clock (rf/32 = 32 1's for one 1 bit, 32 0's for one 0 bit)
|
||||
size_t lastBit = 0;
|
||||
size_t numBits = 0;
|
||||
for(i=21; i < *size-20; i++) {
|
||||
//if transition detected or large number of same bits - store the passed bits
|
||||
if (dest[i] != dest[i-1] || (i-lastBit) == (10 * *clk)) {
|
||||
memset(dest+numBits, dest[i-1] ^ *invert, (i - lastBit + (*clk/4)) / *clk);
|
||||
numBits += (i - lastBit + (*clk/4)) / *clk;
|
||||
lastBit = i-1;
|
||||
}
|
||||
}
|
||||
//PrintAndLog("DEBUG: bestErrCnt: %d, maxErr: %d, bestStart: %d, bestPeakCnt: %d, bestPeakStart: %d",bestErrCnt,maxErr,bestStart,bestPeakCnt,bestPeakStart);
|
||||
if (bestErrCnt > maxErr) return bestErrCnt;
|
||||
|
||||
//best run is good enough set to best run and set overwrite BinStream
|
||||
lastBit = bestPeakStart - *clk;
|
||||
memset(dest, bestFirstPeakHigh^1, bestPeakStart / *clk);
|
||||
bitnum += (bestPeakStart / *clk);
|
||||
for (i = bestPeakStart; i < *size; ++i) {
|
||||
// if expecting a clock bit
|
||||
if ((i >= lastBit + *clk - tol) && (i <= lastBit + *clk + tol)) {
|
||||
// test high/low
|
||||
if (dest[i] >= high || dest[i] <= low) {
|
||||
peakCnt++;
|
||||
bitHigh = 1;
|
||||
errBitHigh = 0;
|
||||
ignoreCnt = ignoreWindow;
|
||||
curBit = *invert;
|
||||
if (dest[i] >= high) curBit ^= 1;
|
||||
dest[bitnum++] = curBit;
|
||||
lastBit += *clk;
|
||||
//else no bars found in clock area
|
||||
} else if (i == lastBit + *clk + tol) {
|
||||
dest[bitnum++] = curBit;
|
||||
lastBit += *clk;
|
||||
}
|
||||
//else if no bars found
|
||||
} else if (dest[i] < high && dest[i] > low){
|
||||
if (ignoreCnt == 0){
|
||||
bitHigh = 0;
|
||||
if (errBitHigh == 1){
|
||||
dest[bitnum++] = 7;
|
||||
errCnt++;
|
||||
}
|
||||
errBitHigh=0;
|
||||
} else {
|
||||
ignoreCnt--;
|
||||
}
|
||||
} else if ((dest[i] >= high || dest[i] <= low) && (bitHigh == 0)) {
|
||||
//error bar found no clock...
|
||||
errBitHigh=1;
|
||||
}
|
||||
if (bitnum >= MaxBits) break;
|
||||
}
|
||||
*size = bitnum;
|
||||
return bestErrCnt;
|
||||
*size = numBits;
|
||||
return 0;
|
||||
}
|
||||
|
||||
//by marshmellow
|
||||
|
|
@ -1405,6 +1418,7 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
uint16_t loopCnt = 4096; //don't need to loop through entire array...
|
||||
if (*size<loopCnt) loopCnt = *size;
|
||||
|
||||
size_t numBits=0;
|
||||
uint8_t curPhase = *invert;
|
||||
size_t i, waveStart=1, waveEnd=0, firstFullWave=0, lastClkBit=0;
|
||||
uint8_t fc=0, fullWaveLen=0, tol=1;
|
||||
|
|
@ -1421,7 +1435,7 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
waveEnd = i+1;
|
||||
//PrintAndLog("DEBUG: waveEnd: %d",waveEnd);
|
||||
waveLenCnt = waveEnd-waveStart;
|
||||
if (waveLenCnt > fc && waveStart > fc){ //not first peak and is a large wave
|
||||
if (waveLenCnt > fc && waveStart > fc && !(waveLenCnt > fc+2)){ //not first peak and is a large wave but not out of whack
|
||||
lastAvgWaveVal = avgWaveVal/(waveLenCnt);
|
||||
firstFullWave = waveStart;
|
||||
fullWaveLen=waveLenCnt;
|
||||
|
|
@ -1434,14 +1448,21 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
}
|
||||
avgWaveVal += dest[i+2];
|
||||
}
|
||||
if (firstFullWave == 0) {
|
||||
// no phase shift detected - could be all 1's or 0's - doesn't matter where we start
|
||||
// so skip a little to ensure we are past any Start Signal
|
||||
firstFullWave = 160;
|
||||
memset(dest, curPhase, firstFullWave / *clock);
|
||||
} else {
|
||||
memset(dest, curPhase^1, firstFullWave / *clock);
|
||||
}
|
||||
//advance bits
|
||||
numBits += (firstFullWave / *clock);
|
||||
//set start of wave as clock align
|
||||
lastClkBit = firstFullWave;
|
||||
//PrintAndLog("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
|
||||
lastClkBit = firstFullWave; //set start of wave as clock align
|
||||
//PrintAndLog("DEBUG: clk: %d, lastClkBit: %d", *clock, lastClkBit);
|
||||
waveStart = 0;
|
||||
size_t numBits=0;
|
||||
//set skipped bits
|
||||
memset(dest, curPhase^1, firstFullWave / *clock);
|
||||
numBits += (firstFullWave / *clock);
|
||||
dest[numBits++] = curPhase; //set first read bit
|
||||
for (i = firstFullWave + fullWaveLen - 1; i < *size-3; i++){
|
||||
//top edge of wave = start of new wave
|
||||
|
|
|
|||
|
|
@ -32,7 +32,7 @@ int getHiLo(uint8_t *BitStream, size_t size, int *high, int *low, uint8_t f
|
|||
uint32_t manchesterEncode2Bytes(uint16_t datain);
|
||||
int ManchesterEncode(uint8_t *BitStream, size_t size);
|
||||
int manrawdecode(uint8_t *BitStream, size_t *size, uint8_t invert);
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert, int maxErr);
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert);
|
||||
uint8_t parityTest(uint32_t bits, uint8_t bitLen, uint8_t pType);
|
||||
uint8_t preambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t *size, size_t *startIdx);
|
||||
int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue