//no arguments needed - built this way in case we want this to be a direct call from "data " cmds in the future
// otherwise could be a void with no arguments
//set defaults
- int high=0, low=128;
- uint64_t lo=0; //hi=0,
-
+ uint64_t lo=0;
uint32_t i = 0;
- uint32_t initLoopMax = 65;
- if (initLoopMax>size) initLoopMax=size;
-
- for (;i < initLoopMax; ++i) //65 samples should be plenty to find high and low values
- {
- if (BitStream[i] > high)
- high = BitStream[i];
- else if (BitStream[i] < low)
- low = BitStream[i];
- }
- if (((high !=1)||(low !=0))){ //allow only 1s and 0s
+ if (BitStream[10]>1){ //allow only 1s and 0s
// PrintAndLog("no data found");
return 0;
}
// search for a start of frame marker
if ( memcmp(BitStream+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
{ // frame marker found
- idx+=9;//sizeof(frame_marker_mask);
+ idx+=9;
for (i=0; i<10;i++){
for(ii=0; ii<5; ++ii){
- parityTest += BitStream[(i*5)+ii+idx];
+ parityTest ^= BitStream[(i*5)+ii+idx];
}
- if (parityTest== ((parityTest>>1)<<1)){
+ if (!parityTest){
parityTest=0;
for (ii=0; ii<4;++ii){
- //hi = (hi<<1)|(lo>>31);
lo=(lo<<1LL)|(BitStream[(i*5)+ii+idx]);
}
//PrintAndLog("DEBUG: EM parity passed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d,lo: %d",parityTest,i,ii,idx,BitStream[idx+ii+(i*5)-5],BitStream[idx+ii+(i*5)-4],BitStream[idx+ii+(i*5)-3],BitStream[idx+ii+(i*5)-2],BitStream[idx+ii+(i*5)-1],lo);
//PrintAndLog("DEBUG: EM parity failed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d",parityTest,i,ii,idx,BitStream[idx+ii+(i*5)-5],BitStream[idx+ii+(i*5)-4],BitStream[idx+ii+(i*5)-3],BitStream[idx+ii+(i*5)-2],BitStream[idx+ii+(i*5)-1]);
parityTest=0;
idx-=8;
- if (resetCnt>5)return 0;
+ if (resetCnt>5)return 0; //try 5 times
resetCnt++;
goto restart;//continue;
}
int askmandemod(uint8_t *BinStream, size_t *size, int *clk, int *invert)
{
int i;
- int high = 0, low = 128;
+ int high = 0, low = 255;
*clk=DetectASKClock(BinStream, *size, *clk); //clock default
if (*clk<8) *clk =64;
else if (BinStream[i] < low)
low = BinStream[i];
}
- if ((high < 158) ){ //throw away static
+ if ((high < 129) ){ //throw away static (anything < 1 graph)
//PrintAndLog("no data found");
return -2;
}
//25% fuzz in case highs and lows aren't clipped [marshmellow]
- high=(int)((high-128)*.75)+128;
- low= (int)((low-128)*.75)+128;
+ high=(int)(((high-128)*.75)+128);
+ low= (int)(((low-128)*.75)+128);
//PrintAndLog("DEBUG - valid high: %d - valid low: %d",high,low);
int lastBit = 0; //set first clock check
{
uint32_t i;
// int invert=0; //invert default
- int high = 0, low = 128;
+ int high = 0, low = 255;
*clk=DetectASKClock(BinStream, *size, *clk); //clock default
uint8_t BitStream[502] = {0};
if (*clk<32) *clk=32;
if (*invert != 0 && *invert != 1) *invert =0;
uint32_t initLoopMax = 200;
- if (initLoopMax>*size) initLoopMax=*size;
+ if (initLoopMax > *size) initLoopMax=*size;
// Detect high and lows
for (i = 0; i < initLoopMax; ++i) //200 samples should be plenty to find high and low values
{
else if (BinStream[i] < low)
low = BinStream[i];
}
- if ((high < 158)){ //throw away static
+ if ((high < 129)){ //throw away static high has to be more than 0 on graph.
+ //noise <= -10 here
// PrintAndLog("no data found");
return -2;
}
//25% fuzz in case highs and lows aren't clipped [marshmellow]
- high=(int)((high-128)*.75)+128;
- low= (int)((low-128)*.75)+128;
+ high=(int)(((high-128)*.75)+128);
+ low= (int)(((low-128)*.75)+128);
//PrintAndLog("DEBUG - valid high: %d - valid low: %d",high,low);
int lastBit = 0; //set first clock check
uint32_t bitnum = 0; //output counter
- uint8_t 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
+ uint8_t 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
uint32_t iii = 0;
uint32_t gLen = *size;
if (gLen > 500) gLen=500;
bitnum++;
}
-
errCnt++;
lastBit+=*clk;//skip over until hit too many errors
if (errCnt > ((*size/1000))){ //allow 1 error for every 1000 samples else start over
}
}
if (bitnum>16){
-
- // PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
- //move BitStream back to BinStream
- // ClearGraph(0);
for (i=0; i < bitnum; ++i){
BinStream[i]=BitStream[i];
}
*size=bitnum;
- // RepaintGraphWindow();
- //output
- // if (errCnt>0){
- // PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
- // }
- // PrintAndLog("ASK decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- // printBitStream2(BitStream,bitnum);
- //int errCnt=0;
- //errCnt=manrawdemod(BitStream,bitnum);
-
- // Em410xDecode(Cmd);
} else return -1;
return errCnt;
}
{
uint32_t last_transition = 0;
uint32_t idx = 1;
- uint32_t maxVal=0;
+ //uint32_t maxVal=0;
if (fchigh==0) fchigh=10;
if (fclow==0) fclow=8;
- // we do care about the actual theshold value as sometimes near the center of the
- // wave we may get static that changes direction of wave for one value
- // if our value is too low it might affect the read. and if our tag or
- // antenna is weak a setting too high might not see anything. [marshmellow]
- if (size<100) return 0;
- for(idx=1; idx<100; idx++){
- if(maxVal<dest[idx]) maxVal = dest[idx];
- }
- // set close to the top of the wave threshold with 25% margin for error
- // less likely to get a false transition up there.
- // (but have to be careful not to go too high and miss some short waves)
- uint8_t threshold_value = (uint8_t)(((maxVal-128)*.75)+128);
+ //set the threshold close to 0 (graph) or 128 std to avoid static
+ uint8_t threshold_value = 123;
// sync to first lo-hi transition, and threshold
//if lastval was 1, we have a 1->0 crossing
if ( dest[idx-1]==1 ) {
n=myround2((float)(n+1)/((float)(rfLen)/(float)fclow));
- //n=(n+1) / h2l_crossing_value;
} else {// 0->1 crossing
- n=myround2((float)(n+1)/((float)(rfLen-2)/(float)fchigh)); //-2 for fudge factor
- //n=(n+1) / l2h_crossing_value;
+ n=myround2((float)(n+1)/((float)(rfLen-1)/(float)fchigh)); //-1 for fudge factor
}
if (n == 0) n = 1;
int IOdemodFSK(uint8_t *dest, size_t size)
{
- static const uint8_t THRESHOLD = 140;
+ static const uint8_t THRESHOLD = 129;
uint32_t idx=0;
//make sure buffer has data
if (size < 66) return -1;
{
int i=0;
int peak=0;
- int low=128;
+ int low=255;
int clk[]={16,32,40,50,64,100,128,256};
int loopCnt = 256; //don't need to loop through entire array...
if (size<loopCnt) loopCnt = size;
//if we already have a valid clock quit
for (;i<8;++i)
- if (clk[i]==clock) return clock;
+ if (clk[i] == clock) return clock;
//get high and low peak
- for (i=0;i<loopCnt;++i){
- if(dest[i]>peak){
+ for (i=0; i < loopCnt; ++i){
+ if(dest[i] > peak){
peak = dest[i];
}
- if(dest[i]<low){
+ if(dest[i] < low){
low = dest[i];
}
}
int bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000};
int errCnt=0;
//test each valid clock from smallest to greatest to see which lines up
- for(clkCnt=0; clkCnt<6;++clkCnt){
- if (clk[clkCnt]==32){
+ for(clkCnt=0; clkCnt < 6; ++clkCnt){
+ if (clk[clkCnt] == 32){
tol=1;
}else{
tol=0;
}
bestErr[clkCnt]=1000;
//try lining up the peaks by moving starting point (try first 256)
- for (ii=0; ii<loopCnt; ++ii){
- if ((dest[ii]>=peak) || (dest[ii]<=low)){
+ for (ii=0; ii< loopCnt; ++ii){
+ if ((dest[ii] >= peak) || (dest[ii] <= low)){
errCnt=0;
// now that we have the first one lined up test rest of wave array
for (i=0; i<((int)(size/clk[clkCnt])-1); ++i){
for (iii=0; iii<7;++iii){
if (bestErr[iii]<bestErr[best]){
// current best bit to error ratio vs new bit to error ratio
- if (((size/clk[best])/bestErr[best]<(size/clk[iii])/bestErr[iii]) ){
+ if (((size/clk[best])/bestErr[best] < (size/clk[iii])/bestErr[iii]) ){
best = iii;
}
}
{
int i=0;
int peak=0;
- int low=128;
+ int low=255;
int clk[]={16,32,40,50,64,100,128,256};
int loopCnt = 2048; //don't need to loop through entire array...
if (size<loopCnt) loopCnt = size;
//if we already have a valid clock quit
- for (;i<8;++i)
- if (clk[i]==clock) return clock;
+ for (; i < 8; ++i)
+ if (clk[i] == clock) return clock;
//get high and low peak
- for (i=0;i<loopCnt;++i){
- if(dest[i]>peak){
+ for (i=0; i < loopCnt; ++i){
+ if(dest[i] > peak){
peak = dest[i];
}
- if(dest[i]<low){
+ if(dest[i] < low){
low = dest[i];
}
}
- peak=(int)(((peak-128)*.90)+128);
- low= (int)(((low-128)*.90)+128);
+ peak=(int)(((peak-128)*.75)+128);
+ low= (int)(((low-128)*.75)+128);
//PrintAndLog("DEBUG: peak: %d, low: %d",peak,low);
int ii;
uint8_t clkCnt;
int bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000,1000};
int peaksdet[]={0,0,0,0,0,0,0,0,0};
//test each valid clock from smallest to greatest to see which lines up
- for(clkCnt=0; clkCnt<6;++clkCnt){
- if (clk[clkCnt]==32){
- tol=0;
+ for(clkCnt=0; clkCnt < 6; ++clkCnt){
+ if (clk[clkCnt] == 32){
+ tol=1;
}else{
tol=0;
}
//try lining up the peaks by moving starting point (try first 256)
- for (ii=0; ii<loopCnt; ++ii){
- if ((dest[ii]>=peak) || (dest[ii]<=low)){
+ for (ii=0; ii< loopCnt; ++ii){
+ if ((dest[ii] >= peak) || (dest[ii] <= low)){
errCnt=0;
peakcnt=0;
// now that we have the first one lined up test rest of wave array
- for (i=0; i<((int)(size/clk[clkCnt])-1); ++i){
+ for (i=0; i < ((int)(size/clk[clkCnt])-1); ++i){
if (dest[ii+(i*clk[clkCnt])]>=peak || dest[ii+(i*clk[clkCnt])]<=low){
peakcnt++;
}else if(dest[ii+(i*clk[clkCnt])-tol]>=peak || dest[ii+(i*clk[clkCnt])-tol]<=low){
//int ratio2; //debug
int ratio;
//int bits;
- for (iii=0; iii<7;++iii){
+ for (iii=0; iii < 7; ++iii){
ratio=1000;
//ratio2=1000; //debug
//bits=size/clk[iii]; //debug
- if (peaksdet[iii]>0){
+ if (peaksdet[iii] > 0){
ratio=bestErr[iii]/peaksdet[iii];
- if (((bestErr[best]/peaksdet[best])>(ratio)+1)){
+ if (((bestErr[best]/peaksdet[best]) > (ratio)+1)){
best = iii;
}
//ratio2=bits/peaksdet[iii]; //debug
void pskCleanWave(uint8_t *bitStream, size_t size)
{
int i;
- int low=128;
+ int low=255;
int high=0;
int gap = 4;
// int loopMax = 2048;
int newLow=0;
int newHigh=0;
- for (i=0; i<size; ++i){
- if (bitStream[i]<low) low=bitStream[i];
- if (bitStream[i]>high) high=bitStream[i];
+ for (i=0; i < size; ++i){
+ if (bitStream[i] < low) low=bitStream[i];
+ if (bitStream[i] > high) high=bitStream[i];
}
high = (int)(((high-128)*.80)+128);
low = (int)(((low-128)*.90)+128);
//low = (uint8_t)(((int)(low)-128)*.80)+128;
- for (i=0; i<size; ++i){
- if (newLow==1){
+ for (i=0; i < size; ++i){
+ if (newLow == 1){
bitStream[i]=low+8;
gap--;
- if (gap==0){
+ if (gap == 0){
newLow=0;
gap=4;
}
- }else if (newHigh==1){
+ }else if (newHigh == 1){
bitStream[i]=high-8;
gap--;
- if (gap==0){
+ if (gap == 0){
newHigh=0;
gap=4;
}
}
- if (bitStream[i]<=low) newLow=1;
- if (bitStream[i]>=high) newHigh=1;
+ if (bitStream[i] <= low) newLow=1;
+ if (bitStream[i] >= high) newHigh=1;
}
return;
}
{
//26 bit 40134 format (don't know other formats)
int i;
- int long_wait;
- long_wait = 29;//29 leading zeros in format
+ int long_wait=29;//29 leading zeros in format
int start;
int first = 0;
int first2 = 0;
// did not find start sequence
return -1;
}
- //found start once now test length by finding next one
// Inverting signal if needed
if (first == 1) {
for (i = start; i < *size; i++) {
}else *invert=0;
int iii;
+ //found start once now test length by finding next one
for (ii=start+29; ii <= *size - 250; ii++) {
first2 = bitStream[ii];
for (iii = ii; iii < ii + long_wait; iii++) {
int clk2 = DetectpskNRZClock(dest, *size, *clk);
*clk=clk2;
uint32_t i;
- uint8_t high=0, low=128;
+ uint8_t high=0, low=255;
uint32_t gLen = *size;
if (gLen > 1280) gLen=1280;
// get high
- for (i=0; i<gLen; ++i){
- if (dest[i]>high) high = dest[i];
- if (dest[i]<low) low=dest[i];
+ for (i=0; i < gLen; ++i){
+ if (dest[i] > high) high = dest[i];
+ if (dest[i] < low) low = dest[i];
}
//fudge high/low bars by 25%
high = (uint8_t)((((int)(high)-128)*.75)+128);
int lastBit = 0; //set first clock check
uint32_t bitnum = 0; //output counter
uint8_t 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=2; //clock tolerance may not be needed anymore currently set to + or - 1 but could be increased for poor waves or removed entirely
+ if (*clk==32) tol = 2; //clock tolerance may not be needed anymore currently set to + or - 1 but could be increased for poor waves or removed entirely
uint32_t iii = 0;
uint8_t errCnt =0;
uint32_t bestStart = *size;
//PrintAndLog("DEBUG - lastbit - %d",lastBit);
//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) || (dest[iii]<=low)){
lastBit=iii-*clk;
//loop through to see if this start location works
for (i = iii; i < *size; ++i) {
ignorewin=*clk/8;
bitnum++;
//else if no bars found
- }else if(dest[i]<high && dest[i]>low) {
+ }else if(dest[i] < high && dest[i] > low) {
if (ignorewin==0){
bitHigh=0;
}else ignorewin--;
//if we are past a clock point
- if (i>=lastBit+*clk+tol){ //clock val
+ if (i >= lastBit+*clk+tol){ //clock val
lastBit+=*clk;
bitnum++;
}
if (bitnum>=1000) break;
}
//we got more than 64 good bits and not all errors
- if ((bitnum > (64+errCnt)) && (errCnt<(maxErr))) {
+ if ((bitnum > (64+errCnt)) && (errCnt < (maxErr))) {
//possible good read
- if (errCnt==0){
+ if (errCnt == 0){
bestStart = iii;
- bestErrCnt=errCnt;
+ bestErrCnt = errCnt;
break; //great read - finish
}
if (bestStart == iii) break; //if current run == bestErrCnt run (after exhausted testing) then finish
- if (errCnt<bestErrCnt){ //set this as new best run
- bestErrCnt=errCnt;
+ if (errCnt < bestErrCnt){ //set this as new best run
+ bestErrCnt = errCnt;
bestStart = iii;
}
}
}
}
- if (bestErrCnt<maxErr){
+ if (bestErrCnt < maxErr){
//best run is good enough set to best run and set overwrite BinStream
iii=bestStart;
lastBit=bestStart-*clk;
bitnum=0;
for (i = iii; i < *size; ++i) {
//if we found a high bar and we are at a clock bit
- if ((dest[i]>=high ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
+ if ((dest[i] >= high ) && (i>=lastBit+*clk-tol && i<=lastBit+*clk+tol)){
bitHigh=1;
lastBit+=*clk;
curBit=1-*invert;
projects / proxmark3-svn / blobdiff