uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode=0;
size_t DemodBufferLen=0;
-//size_t g_demodStartIdx=0;
-//uint8_t g_demodClock=0;
+int g_DemodStartIdx=0;
+int g_DemodClock=0;
static int CmdHelp(const char *Cmd);
static uint8_t SavedDB[MAX_DEMOD_BUF_LEN];
static size_t SavedDBlen;
static bool DB_Saved = false;
+ static int savedDemodStartIdx = 0;
+ static int savedDemodClock = 0;
- if (saveOpt==1) { //save
+ if (saveOpt == GRAPH_SAVE) { //save
memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
SavedDBlen = DemodBufferLen;
DB_Saved=true;
+ savedDemodStartIdx = g_DemodStartIdx;
+ savedDemodClock = g_DemodClock;
} else if (DB_Saved) { //restore
memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
DemodBufferLen = SavedDBlen;
+ g_DemodClock = savedDemodClock;
+ g_DemodStartIdx = savedDemodStartIdx;
}
return;
}
}
bool st = false;
size_t ststart = 0, stend = 0;
- if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
+ if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend);
*stCheck = st;
if (st) {
clk = (clk == 0) ? foundclk : clk;
//}
//RepaintGraphWindow();
}
- int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
+ int startIdx = 0;
+ int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx);
if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
return 0;
return 0;
}
if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
-
//output
setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, startIdx);
+
if (verbose || g_debugMode){
if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
}
bool st = true;
if (Cmd[0]=='s')
- return ASKDemod_ext(Cmd++, true, true, 1, &st);
+ return ASKDemod_ext(Cmd++, true, false, 1, &st);
else if (Cmd[1] == 's')
- return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
+ return ASKDemod_ext(Cmd+=2, true, false, 1, &st);
else
- return ASKDemod(Cmd, true, true, 1);
+ return ASKDemod(Cmd, true, false, 1);
}
//by marshmellow
uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
size = sizeof(BitStream);
if ( !getDemodBuf(BitStream, &size) ) return 0;
- errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
+ errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert);
if (errCnt<0){
PrintAndLog("Error during decode:%d", errCnt);
return 0;
if (errCnt>0){
PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
}
+
PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
+ setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2);
return 1;
}
sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
- size_t size = getFromGraphBuf(BitStream);
+ size_t size = getFromGraphBuf(BitStream);
+ int startIdx = 0;
//invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
- int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
+ int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);
if ( errCnt < 0 || errCnt > maxErr ) {
if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
return 0;
- }
+ }
//attempt to Biphase decode BitStream
- errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
+ errCnt = BiphaseRawDecode(BitStream, &size, &offset, invert);
if (errCnt < 0){
if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
return 0;
- }
+ }
if (errCnt > maxErr) {
if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
return 0;
}
//success set DemodBuffer and return
setDemodBuf(BitStream, size, 0);
+ setClockGrid(clk, startIdx + clk*offset/2);
if (g_debugMode || verbose){
PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
printDemodBuff();
return ASKDemod(Cmd, true, false, 0);
}
-int AutoCorrelate(int window, bool SaveGrph, bool verbose)
+int AutoCorrelate(const int *in, int *out, size_t len, int window, bool SaveGrph, bool verbose)
{
static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
size_t Correlation = 0;
int maxSum = 0;
int lastMax = 0;
if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
- for (int i = 0; i < GraphTraceLen - window; ++i) {
+ for (int i = 0; i < len - window; ++i) {
int sum = 0;
for (int j = 0; j < window; ++j) {
- sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
+ sum += (in[j]*in[i + j]) / 256;
}
CorrelBuffer[i] = sum;
- if (sum >= maxSum-100 && sum <= maxSum+100){
+ if (sum >= maxSum-100 && sum <= maxSum+100) {
//another max
Correlation = i-lastMax;
lastMax = i;
if (sum > maxSum) maxSum = sum;
- } else if (sum > maxSum){
+ } else if (sum > maxSum) {
maxSum=sum;
lastMax = i;
}
}
- if (Correlation==0){
+ if (Correlation==0) {
//try again with wider margin
- for (int i = 0; i < GraphTraceLen - window; i++){
- if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
+ for (int i = 0; i < len - window; i++) {
+ if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)) {
//another max
Correlation = i-lastMax;
lastMax = i;
- //if (CorrelBuffer[i] > maxSum) maxSum = sum;
}
}
}
if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
- if (SaveGrph){
- GraphTraceLen = GraphTraceLen - window;
- memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
+ if (SaveGrph) {
+ //GraphTraceLen = GraphTraceLen - window;
+ memcpy(out, CorrelBuffer, len * sizeof(int));
RepaintGraphWindow();
}
return Correlation;
return 0;
}
if (grph == 'g') updateGrph=true;
- return AutoCorrelate(window, updateGrph, true);
+ return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true);
}
int CmdBitsamples(const char *Cmd)
return 0;
}
+int AskEdgeDetect(const int *in, int *out, int len, int threshold) {
+ int Last = 0;
+ for(int i = 1; i<len; i++) {
+ if (in[i]-in[i-1] >= threshold) //large jump up
+ Last = 127;
+ else if(in[i]-in[i-1] <= -1 * threshold) //large jump down
+ Last = -127;
+ out[i-1] = Last;
+ }
+ return 0;
+}
+
//by marshmellow
//use large jumps in read samples to identify edges of waves and then amplify that wave to max
//similar to dirtheshold, threshold commands
int CmdAskEdgeDetect(const char *Cmd)
{
int thresLen = 25;
- int Last = 0;
+ int ans = 0;
sscanf(Cmd, "%i", &thresLen);
- for(int i = 1; i<GraphTraceLen; i++){
- if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
- Last = 127;
- else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
- Last = -127;
- GraphBuffer[i-1] = Last;
- }
+ ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
RepaintGraphWindow();
- return 0;
+ return ans;
}
/* Print our clock rate */
}
//get bit clock length
if (!rfLen) {
- rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
+ int firstClockEdge = 0; //todo - align grid on graph with this...
+ rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
if (!rfLen) rfLen = 50;
}
- int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
+ int startIdx = 0;
+ int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
if (size > 0) {
setDemodBuf(BitStream,size,0);
+ setClockGrid(rfLen, startIdx);
- // Now output the bitstream to the scrollback by line of 16 bits
+ // Now output the bitstream to the scrollback by line of 16 bits
if (verbose || g_debugMode) {
PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return 0;
int errCnt=0;
- errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
+ int startIdx = 0;
+ errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
if (errCnt > maxErr){
if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
//prime demod buffer for output
setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, startIdx);
+
return 1;
}
if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
//prime demod buffer for output
setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, clkStartIdx);
+
if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
if (verbose || g_debugMode) {
return ans;
}
+void setClockGrid(int clk, int offset) {
+ g_DemodStartIdx = offset;
+ g_DemodClock = clk;
+ if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk);
+
+ if (offset > clk) offset %= clk;
+ if (offset < 0) offset += clk;
+
+ if (offset > GraphTraceLen || offset < 0) return;
+ if (clk < 8 || clk > GraphTraceLen) {
+ GridLocked = false;
+ GridOffset = 0;
+ PlotGridX = 0;
+ PlotGridXdefault = 0;
+ RepaintGraphWindow();
+ } else {
+ GridLocked = true;
+ GridOffset = offset;
+ PlotGridX = clk;
+ PlotGridXdefault = clk;
+ RepaintGraphWindow();
+ }
+}
+
int CmdGrid(const char *Cmd)
{
sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
GraphTraceLen = n;
}
+ setClockGrid(0,0);
RepaintGraphWindow();
return 0;
}
}
fclose(f);
PrintAndLog("loaded %d samples", GraphTraceLen);
+ setClockGrid(0,0);
RepaintGraphWindow();
return 0;
}
return 0;
}
-int CmdDirectionalThreshold(const char *Cmd)
+int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
{
- int8_t upThres = param_get8(Cmd, 0);
- int8_t downThres = param_get8(Cmd, 1);
-
- printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
+ int lastValue = in[0];
+ out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
- int lastValue = GraphBuffer[0];
- GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
-
- for (int i = 1; i < GraphTraceLen; ++i) {
+ for (int i = 1; i < len; ++i) {
// Apply first threshold to samples heading up
- if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
+ if (in[i] >= up && in[i] > lastValue)
{
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = 127;
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = 1;
}
// Apply second threshold to samples heading down
- else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
+ else if (in[i] <= down && in[i] < lastValue)
{
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = -127;
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = -1;
}
else
{
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = GraphBuffer[i-1];
-
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = out[i-1];
}
}
- GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
+ out[0] = out[1]; // Align with first edited sample.
+ return 0;
+}
+
+int CmdDirectionalThreshold(const char *Cmd)
+{
+ int8_t upThres = param_get8(Cmd, 0);
+ int8_t downThres = param_get8(Cmd, 1);
+
+ printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
+
+ directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres);
RepaintGraphWindow();
return 0;
}
{"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
{"dec", CmdDec, 1, "Decimate samples"},
{"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
- //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
{"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
{"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
{"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
projects / proxmark3-svn / blobdiff