//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;
-
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;
}
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){
lo=(lo<<1LL)|(BitStream[(i*5)+ii+idx]);
//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;
}
{
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};
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;
}
{
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 ( dest[idx-1]==1 ) {
n=myround2((float)(n+1)/((float)(rfLen)/(float)fclow));
} else {// 0->1 crossing
- n=myround2((float)(n+1)/((float)(rfLen-2)/(float)fchigh)); //-2 for fudge factor
+ 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;
{
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;
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;
//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;
+ tol=1;
}else{
tol=0;
}
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;
{
//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
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;
projects / proxmark3-svn / blobdiff