- int clock = DetectClock(0);
- PrintAndLog("Auto-detected clock rate: %d", clock);
- return 0;
-}
-
-int CmdFSKdemod(const char *Cmd)
-{
- static const int LowTone[] = {
- 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
- 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
- 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
- 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
- 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
- };
- static const int HighTone[] = {
- 1, 1, 1, 1, 1, -1, -1, -1, -1,
- 1, 1, 1, 1, -1, -1, -1, -1,
- 1, 1, 1, 1, -1, -1, -1, -1,
- 1, 1, 1, 1, -1, -1, -1, -1,
- 1, 1, 1, 1, -1, -1, -1, -1,
- 1, 1, 1, 1, -1, -1, -1, -1, -1,
- };
-
- int lowLen = sizeof (LowTone) / sizeof (int);
- int highLen = sizeof (HighTone) / sizeof (int);
- int convLen = (highLen > lowLen) ? highLen : lowLen;
- uint32_t hi = 0, lo = 0;
-
- int i, j;
- int minMark = 0, maxMark = 0;
-
- for (i = 0; i < GraphTraceLen - convLen; ++i) {
- int lowSum = 0, highSum = 0;
-
- for (j = 0; j < lowLen; ++j) {
- lowSum += LowTone[j]*GraphBuffer[i+j];
- }
- for (j = 0; j < highLen; ++j) {
- highSum += HighTone[j] * GraphBuffer[i + j];
- }
- lowSum = abs(100 * lowSum / lowLen);
- highSum = abs(100 * highSum / highLen);
- GraphBuffer[i] = (highSum << 16) | lowSum;
- }
-
- for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
- int lowTot = 0, highTot = 0;
- // 10 and 8 are f_s divided by f_l and f_h, rounded
- for (j = 0; j < 10; ++j) {
- lowTot += (GraphBuffer[i+j] & 0xffff);
- }
- for (j = 0; j < 8; j++) {
- highTot += (GraphBuffer[i + j] >> 16);
- }
- GraphBuffer[i] = lowTot - highTot;
- if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
- if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
- }
-
- GraphTraceLen -= (convLen + 16);
- RepaintGraphWindow();
-
- // Find bit-sync (3 lo followed by 3 high)
- int max = 0, maxPos = 0;
- for (i = 0; i < 6000; ++i) {
- int dec = 0;
- for (j = 0; j < 3 * lowLen; ++j) {
- dec -= GraphBuffer[i + j];
- }
- for (; j < 3 * (lowLen + highLen ); ++j) {
- dec += GraphBuffer[i + j];
- }
- if (dec > max) {
- max = dec;
- maxPos = i;
- }
- }
-
- // place start of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- maxPos += j;
-
- // place end of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos+1] = minMark;
-
- PrintAndLog("actual data bits start at sample %d", maxPos);
- PrintAndLog("length %d/%d", highLen, lowLen);
-
- uint8_t bits[46];
- bits[sizeof(bits)-1] = '\0';
-
- // find bit pairs and manchester decode them
- for (i = 0; i < arraylen(bits) - 1; ++i) {
- int dec = 0;
- for (j = 0; j < lowLen; ++j) {
- dec -= GraphBuffer[maxPos + j];
- }
- for (; j < lowLen + highLen; ++j) {
- dec += GraphBuffer[maxPos + j];
- }
- maxPos += j;
- // place inter bit marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- // hi and lo form a 64 bit pair
- hi = (hi << 1) | (lo >> 31);
- lo = (lo << 1);
- // store decoded bit as binary (in hi/lo) and text (in bits[])
- if(dec < 0) {
- bits[i] = '1';
- lo |= 1;
- } else {
- bits[i] = '0';
- }
- }
- PrintAndLog("bits: '%s'", bits);
- PrintAndLog("hex: %08x %08x", hi, lo);
- return 0;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data detectclock [modulation] <clock>");
+ PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
+ PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
+ PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
+ PrintAndLog("");
+ PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
+ }
+ int ans=0;
+ if (cmdp == 'a'){
+ ans = GetAskClock(Cmd+1, true, false);
+ } else if (cmdp == 'f'){
+ ans = GetFskClock("", true, false);
+ } else if (cmdp == 'n'){
+ ans = GetNrzClock("", true, false);
+ } else if (cmdp == 'p'){
+ ans = GetPskClock("", true, false);
+ } else {
+ PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
+ }
+ return ans;
+}
+
+char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
+{
+ static char fType[8];
+ memset(fType, 0x00, 8);
+ char *fskType = fType;
+ if (fchigh==10 && fclow==8){
+ if (invert) //fsk2a
+ memcpy(fskType, "FSK2a", 5);
+ else //fsk2
+ memcpy(fskType, "FSK2", 4);
+ } else if (fchigh == 8 && fclow == 5) {
+ if (invert)
+ memcpy(fskType, "FSK1", 4);
+ else
+ memcpy(fskType, "FSK1a", 5);
+ } else {
+ memcpy(fskType, "FSK??", 5);
+ }
+ return fskType;
+}
+
+//by marshmellow
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int FSKrawDemod(const char *Cmd, bool verbose)
+{
+ //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+ uint8_t rfLen, invert, fchigh, fclow;
+ //set defaults
+ //set options from parameters entered with the command
+ rfLen = param_get8(Cmd, 0);
+ invert = param_get8(Cmd, 1);
+ fchigh = param_get8(Cmd, 2);
+ fclow = param_get8(Cmd, 3);
+
+ if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
+ if (rfLen==1) {
+ invert = 1; //if invert option only is used
+ rfLen = 0;
+ }
+ }
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ size_t BitLen = getFromGraphBuf(BitStream);
+ if (BitLen==0) return 0;
+ //get field clock lengths
+ uint16_t fcs=0;
+ if (!fchigh || !fclow) {
+ fcs = countFC(BitStream, BitLen, 1);
+ if (!fcs) {
+ fchigh = 10;
+ fclow = 8;
+ } else {
+ fchigh = (fcs >> 8) & 0x00FF;
+ fclow = fcs & 0x00FF;
+ }
+ }
+ //get bit clock length
+ if (!rfLen) {
+ int firstClockEdge = 0; //todo - align grid on graph with this...
+ rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
+ if (!rfLen) rfLen = 50;
+ }
+ 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
+ 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));
+ printDemodBuff();
+ }
+
+ return 1;
+ } else {
+ if (g_debugMode) PrintAndLog("no FSK data found");
+ }
+ return 0;
+}
+
+//by marshmellow
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int CmdFSKrawdemod(const char *Cmd)
+{
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
+ PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
+ PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
+ PrintAndLog(" [fclow], small field clock length, omit for autodetect");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
+ PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
+ PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
+ PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
+ PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
+ return 0;
+ }
+ return FSKrawDemod(Cmd, true);
+}
+
+//by marshmellow
+//attempt to psk1 demod graph buffer
+int PSKDemod(const char *Cmd, bool verbose)
+{
+ int invert=0;
+ int clk=0;
+ int maxErr=100;
+ sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
+ if (invert != 0 && invert != 1) {
+ if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
+ return 0;
+ }
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ size_t BitLen = getFromGraphBuf(BitStream);
+ if (BitLen==0) return 0;
+ int errCnt=0;
+ 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;
+ }
+ if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
+ if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ return 0;
+ }
+ if (verbose || g_debugMode){
+ PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
+ if (errCnt>0){
+ PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+ }
+ }
+ //prime demod buffer for output
+ setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, startIdx);
+
+ return 1;
+}
+
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate nrz only
+// prints binary found and saves in demodbuffer for further commands
+int NRZrawDemod(const char *Cmd, bool verbose)
+{
+ int invert=0;
+ int clk=0;
+ int maxErr=100;
+ sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
+ if (invert != 0 && invert != 1) {
+ PrintAndLog("Invalid argument: %s", Cmd);
+ return 0;
+ }
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ size_t BitLen = getFromGraphBuf(BitStream);
+ if (BitLen==0) return 0;
+ int errCnt=0;
+ int clkStartIdx = 0;
+ errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
+ if (errCnt > maxErr){
+ if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ return 0;
+ }
+ if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
+ if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ return 0;
+ }
+ 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) {
+ PrintAndLog("NRZ demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
+ }
+ return 1;
+}
+
+int CmdNRZrawDemod(const char *Cmd)
+{
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ return 0;
+ }
+ return NRZrawDemod(Cmd, true);
+}
+
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate psk only
+// prints binary found and saves in demodbuffer for further commands
+int CmdPSK1rawDemod(const char *Cmd)
+{
+ int ans;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ return 0;
+ }
+ ans = PSKDemod(Cmd, true);
+ //output
+ if (!ans){
+ if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
+ return 0;
+ }
+
+ PrintAndLog("PSK1 demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
+ return 1;
+}
+
+// by marshmellow
+// takes same args as cmdpsk1rawdemod
+int CmdPSK2rawDemod(const char *Cmd)
+{
+ int ans=0;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
+ PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
+ PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
+ PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
+ return 0;
+ }
+ ans=PSKDemod(Cmd, true);
+ if (!ans){
+ if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
+ return 0;
+ }
+ psk1TOpsk2(DemodBuffer, DemodBufferLen);
+ PrintAndLog("PSK2 demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
+ return 1;
+}
+
+// by marshmellow - combines all raw demod functions into one menu command
+int CmdRawDemod(const char *Cmd)
+{
+ char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
+
+ if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
+ PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
+ PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
+ PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
+ PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
+ PrintAndLog(" <options> see specific modulation help for optional parameters");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
+ PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
+ PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
+ PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
+ PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
+ PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
+ PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
+ PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
+ return 0;
+ }
+ char cmdp2 = Cmd[1];
+ int ans = 0;
+ if (cmdp == 'f' && cmdp2 == 's'){
+ ans = CmdFSKrawdemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'b'){
+ ans = Cmdaskbiphdemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'm'){
+ ans = Cmdaskmandemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'r'){
+ ans = Cmdaskrawdemod(Cmd+2);
+ } else if(cmdp == 'n' && cmdp2 == 'r'){
+ ans = CmdNRZrawDemod(Cmd+2);
+ } else if(cmdp == 'p' && cmdp2 == '1'){
+ ans = CmdPSK1rawDemod(Cmd+2);
+ } else if(cmdp == 'p' && cmdp2 == '2'){
+ ans = CmdPSK2rawDemod(Cmd+2);
+ } else {
+ PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
+ }
+ 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();
+ }
projects / proxmark3-svn / blobdiff