for (uint8_t i = 0; i < bitLen; i++){
ans ^= ((bits >> i) & 1);
}
- //PrintAndLog("DEBUG: ans: %d, ptype: %d",ans,pType);
+ //prnt("DEBUG: ans: %d, ptype: %d",ans,pType);
return (ans == pType);
}
if ((BinStream[i] >= high && !waveHigh) || (BinStream[i] <= low && waveHigh)){
if (smplCnt > clk-(clk/4)-1) { //full clock
- if (smplCnt > clk + (clk/4)+2) { //too many samples
+ if (smplCnt > clk + (clk/4)+1) { //too many samples
errCnt++;
if (g_debugMode==2) prnt("DEBUG ASK: Modulation Error at: %u", i);
BinStream[bitCnt++] = 7;
if (*clk==0 || start < 0) return -3;
if (*invert != 1) *invert = 0;
if (amp==1) askAmp(BinStream, *size);
- if (g_debugMode==2) prnt("DEBUG ASK: size %d, clk %d, beststart %d", *size, *clk, start);
+ if (g_debugMode==2) prnt("DEBUG ASK: clk %d, beststart %d, amp %d", *clk, start, amp);
uint8_t initLoopMax = 255;
if (initLoopMax > *size) initLoopMax = *size;
uint32_t n=1;
for( idx=1; idx < size; idx++) {
n++;
- if (dest[idx]==lastval) continue;
+ if (dest[idx]==lastval) continue; //skip until we hit a transition
//find out how many bits (n) we collected
//if lastval was 1, we have a 1->0 crossing
// by iceman
// find Visa2000 preamble in already demoded data
int Visa2kDemod_AM(uint8_t *dest, size_t *size) {
- if (*size < 96*2) return -1; //make sure buffer has data
+ if (*size < 96) return -1; //make sure buffer has data
size_t startIdx = 0;
uint8_t preamble[] = {0,1,0,1,0,1,1,0,0,1,0,0,1,0,0,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,1,0};
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
// by iceman
// find Noralsy preamble in already demoded data
int NoralsyDemod_AM(uint8_t *dest, size_t *size) {
- if (*size < 96*2) return -1; //make sure buffer has data
+ if (*size < 96) return -1; //make sure buffer has data
size_t startIdx = 0;
uint8_t preamble[] = {1,0,1,1,1,0,1,1,0,0,0,0};
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
fcCounter=0;
rfCounter=0;
firstBitFnd=0;
- //PrintAndLog("DEBUG: fcTol: %d",fcTol);
+ //prnt("DEBUG: fcTol: %d",fcTol);
// prime i to first peak / up transition
for (i = 160; i < size-20; i++)
if (BitStream[i] > BitStream[i-1] && BitStream[i]>=BitStream[i+1])
}
}
if (rfCounter > 0 && rfLensFnd < 15){
- //PrintAndLog("DEBUG: rfCntr %d, fcCntr %d",rfCounter,fcCounter);
+ //prnt("DEBUG: rfCntr %d, fcCntr %d",rfCounter,fcCounter);
rfCnts[rfLensFnd]++;
rfLens[rfLensFnd++] = rfCounter;
}
uint16_t errCnt=0, waveLenCnt=0;
fc = countFC(dest, *size, 0);
if (fc!=2 && fc!=4 && fc!=8) return -1;
- //PrintAndLog("DEBUG: FC: %d",fc);
+ //prnt("DEBUG: FC: %d",fc);
*clock = DetectPSKClock(dest, *size, *clock);
if (*clock == 0) return -1;
int avgWaveVal=0, lastAvgWaveVal=0;
for (i=0; i<loopCnt; i++){
if (dest[i]+fc < dest[i+1] && dest[i+1] >= dest[i+2]){
waveEnd = i+1;
- //PrintAndLog("DEBUG: waveEnd: %d",waveEnd);
+ //prnt("DEBUG: waveEnd: %d",waveEnd);
waveLenCnt = waveEnd-waveStart;
if (waveLenCnt > fc && waveStart > fc && !(waveLenCnt > fc+2)){ //not first peak and is a large wave but not out of whack
lastAvgWaveVal = avgWaveVal/(waveLenCnt);
waveLenCnt = waveEnd-waveStart;
lastAvgWaveVal = avgWaveVal/waveLenCnt;
if (waveLenCnt > fc){
- //PrintAndLog("DEBUG: avgWaveVal: %d, waveSum: %d",lastAvgWaveVal,avgWaveVal);
+ //prnt("DEBUG: avgWaveVal: %d, waveSum: %d",lastAvgWaveVal,avgWaveVal);
//this wave is a phase shift
- //PrintAndLog("DEBUG: phase shift at: %d, len: %d, nextClk: %d, i: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+*clock-tol,i+1,fc);
+ //prnt("DEBUG: phase shift at: %d, len: %d, nextClk: %d, i: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+*clock-tol,i+1,fc);
if (i+1 >= lastClkBit + *clock - tol){ //should be a clock bit
curPhase ^= 1;
dest[numBits++] = curPhase;
int tol = 0;
int i, j, skip, start, end, low, high, minClk, waveStart;
bool complete = false;
- int tmpbuff[bufsize / 64];
- int waveLen[bufsize / 64];
+ int tmpbuff[bufsize / 32]; //guess rf/32 clock, if click is smaller we will only have room for a fraction of the samples captured
+ int waveLen[bufsize / 32]; // if clock is larger then we waste memory in array size that is not needed...
size_t testsize = (bufsize < 512) ? bufsize : 512;
int phaseoff = 0;
high = low = 128;
memset(tmpbuff, 0, sizeof(tmpbuff));
+ memset(waveLen, 0, sizeof(waveLen));
+
if ( getHiLo(buffer, testsize, &high, &low, 80, 80) == -1 ) {
if (g_debugMode==2) prnt("DEBUG STT: just noise detected - quitting");
return false; //just noise
waveStart = i;
while ((buffer[i] > low) && (i < bufsize))
++i;
- if (j >= (bufsize/64)) {
+ if (j >= (bufsize/32)) {
break;
}
waveLen[j] = i - waveStart; //first high to first low
if (start < 0) {
if (g_debugMode==2) prnt("DEBUG STT: first STT not found - quitting");
return false;
+ } else {
+ if (g_debugMode==2) prnt("DEBUG STT: first STT found at: %d, j=%d",start, j);
}
if (waveLen[i+2] > clk*1+tol)
phaseoff = 0;
end = skip;
for (i += 3; i < j - 4; ++i) {
end += tmpbuff[i];
- if (tmpbuff[i] >= clk*1-tol && tmpbuff[i] <= (clk*2)+tol) { //1 to 2 clocks depending on 2 bits prior
+ if (tmpbuff[i] >= clk*1-tol && tmpbuff[i] <= (clk*2)+tol && waveLen[i] < clk+tol) { //1 to 2 clocks depending on 2 bits prior
if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol && waveLen[i+1] > clk*3/2-tol) { //2 clocks and wave size is 1 1/2
if (tmpbuff[i+2] >= (clk*3)/2-tol && tmpbuff[i+2] <= clk*2+tol && waveLen[i+2] > clk-tol) { //1 1/2 to 2 clocks and at least one full clock wave
if (tmpbuff[i+3] >= clk*1-tol && tmpbuff[i+3] <= clk*2+tol) { //1 to 2 clocks for end of ST + first bit
start = skip;
size_t datalen = end - start;
// check validity of datalen (should be even clock increments) - use a tolerance of up to 1/8th a clock
- if (datalen % clk > clk/8) {
+ if ( clk - (datalen % clk) <= clk/8) {
+ // padd the amount off - could be problematic... but shouldn't happen often
+ datalen += clk - (datalen % clk);
+ } else if ( (datalen % clk) <= clk/8 ) {
+ // padd the amount off - could be problematic... but shouldn't happen often
+ datalen -= datalen % clk;
+ } else {
if (g_debugMode==2) prnt("DEBUG STT: datalen not divisible by clk: %u %% %d = %d - quitting", datalen, clk, datalen % clk);
return false;
- } else {
- // padd the amount off - could be problematic... but shouldn't happen often
- datalen += datalen % clk;
}
// if datalen is less than one t55xx block - ERROR
if (datalen/clk < 8*4) {
return false;
}
size_t dataloc = start;
+ if (buffer[dataloc-(clk*4)-(clk/8)] <= low && buffer[dataloc] <= low && buffer[dataloc-(clk*4)] >= high) {
+ //we have low drift (and a low just before the ST and a low just after the ST) - compensate by backing up the start
+ for ( i=0; i <= (clk/8); ++i ) {
+ if ( buffer[dataloc - (clk*4) - i] <= low ) {
+ dataloc -= i;
+ break;
+ }
+ }
+ }
+
size_t newloc = 0;
i=0;
+ if (g_debugMode==2) prnt("DEBUG STT: Starting STT trim - start: %d, datalen: %d ",dataloc, datalen);
+
// warning - overwriting buffer given with raw wave data with ST removed...
while ( dataloc < bufsize-(clk/2) ) {
//compensate for long high at end of ST not being high due to signal loss... (and we cut out the start of wave high part)
}
newloc += i;
//skip next ST - we just assume it will be there from now on...
+ if (g_debugMode==2) prnt("DEBUG STT: skipping STT at %d to %d", dataloc, dataloc+(clk*4));
dataloc += clk*4;
}
*size = newloc;
projects / proxmark3-svn / blobdiff