biphase bug fixes

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index b8b95c049a223a640b1c4d7a6a30bf28bf40b163..e6e4dc0a0f8c4f2cb485433962f35dfe8144baa3 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -133,20 +133,19 @@ int CmdAmp(const char *Cmd)
  * Updates the Graph trace with 0/1 values
  *
  * Arguments:
- * c : 0 or 1
+ * c : 0 or 1  (or invert)
  */
- //this method is dependant on all highs and lows to be the same(or clipped)  this creates issues[marshmellow] it also ignores the clock
+ //this method ignores the clock
+
+ //this function strictly converts highs and lows to 1s and 0s for each sample in the graphbuffer
 int Cmdaskdemod(const char *Cmd)
 {
   int i;
   int c, high = 0, low = 0;
 
-  // TODO: complain if we do not give 2 arguments here !
-  // (AL - this doesn't make sense! we're only using one argument!!!)
   sscanf(Cmd, "%i", &c);
 
-  /* Detect high and lows and clock */
-       // (AL - clock???)
+  /* Detect high and lows */
   for (i = 0; i < GraphTraceLen; ++i)
   {
     if (GraphBuffer[i] > high)
@@ -176,9 +175,9 @@ int Cmdaskdemod(const char *Cmd)
      * down)
      */
     //[marhsmellow] change == to >= for high and <= for low for fuzz
-    if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) {
+    if ((GraphBuffer[i] >= high) && (GraphBuffer[i - 1] == c)) {
       GraphBuffer[i] = 1 - c;
-    } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){
+    } else if ((GraphBuffer[i] <= low) && (GraphBuffer[i - 1] == (1 - c))){
       GraphBuffer[i] = c;
     } else {
       /* No transition */
@@ -189,6 +188,23 @@ int Cmdaskdemod(const char *Cmd)
   return 0;
 }
 
+//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
+int CmdGetBitStream(const char *Cmd)
+{
+  int i;
+  CmdHpf(Cmd);
+  for (i = 0; i < GraphTraceLen; i++) {
+    if (GraphBuffer[i] >= 1) {
+      GraphBuffer[i] = 1;
+    } else {
+      GraphBuffer[i] = 0;
+    }
+  }
+  RepaintGraphWindow();
+  return 0;
+}
+
+
 //by marshmellow
 void printBitStream(uint8_t BitStream[], uint32_t bitLen)
 {
@@ -504,6 +520,7 @@ int CmdBiphaseDecodeRaw(const char *Cmd)
        PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
        printBitStream(BitStream, size);
        PrintAndLog("\nif bitstream does not look right try offset=1");
+  if (offset == 1) setDemodBuf(DemodBuffer,DemodBufferLen-1,1);  //remove first bit from raw demod
        return 1;
 }
 
@@ -518,7 +535,7 @@ void setBiphaseDemodBuf(uint8_t *BitStream, size_t size)
     return;
   }
   for (size_t idx=0; idx<size; idx++){
-    if(BitStream[idx]){
+    if(!BitStream[idx]){
       rawStream[i++] = curPhase;
       rawStream[i++] = curPhase;
       curPhase ^= 1; 
@@ -1770,11 +1787,11 @@ int CmdNRZrawDemod(const char *Cmd)
     PrintAndLog("     <invert>, 1 for invert output");
     PrintAndLog("     [set maximum allowed errors], default = 100.");
     PrintAndLog("");
-    PrintAndLog("    sample: data nrzrawdemod        = demod a nrz/direct tag from GraphBuffer");
-    PrintAndLog("          : data nrzrawdemod 32     = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
-    PrintAndLog("          : data nrzrawdemod 32 1   = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
-    PrintAndLog("          : data nrzrawdemod 1      = demod a nrz/direct tag from GraphBuffer while inverting data");
-    PrintAndLog("          : data nrzrawdemod 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+    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);
@@ -1794,11 +1811,11 @@ int CmdPSK1rawDemod(const char *Cmd)
     PrintAndLog("     <invert>, 1 for invert output");
     PrintAndLog("     [set maximum allowed errors], default = 100.");
     PrintAndLog("");
-    PrintAndLog("    sample: data psk1rawdemod        = demod a psk1 tag from GraphBuffer");
-    PrintAndLog("          : data psk1rawdemod 32     = demod a psk1 tag from GraphBuffer using a clock of RF/32");
-    PrintAndLog("          : data psk1rawdemod 32 1   = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
-    PrintAndLog("          : data psk1rawdemod 1      = demod a psk1 tag from GraphBuffer while inverting data");
-    PrintAndLog("          : data psk1rawdemod 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+    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;
   }
   errCnt = PSKDemod(Cmd, TRUE);
@@ -1828,11 +1845,11 @@ int CmdPSK2rawDemod(const char *Cmd)
     PrintAndLog("     <invert>, 1 for invert output");
     PrintAndLog("     [set maximum allowed errors], default = 100.");
     PrintAndLog("");
-    PrintAndLog("    sample: data psk2rawdemod        = demod a psk2 tag from GraphBuffer, autodetect clock");
-    PrintAndLog("          : data psk2rawdemod 32     = demod a psk2 tag from GraphBuffer using a clock of RF/32");
-    PrintAndLog("          : data psk2rawdemod 32 1   = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
-    PrintAndLog("          : data psk2rawdemod 1      = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
-    PrintAndLog("          : data psk2rawdemod 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
+    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;
   }
   errCnt=PSKDemod(Cmd, TRUE);
@@ -1954,6 +1971,7 @@ int CmdHide(const char *Cmd)
   return 0;
 }
 
+//zero mean GraphBuffer
 int CmdHpf(const char *Cmd)
 {
   int i;
@@ -2561,6 +2579,7 @@ static command_t CommandTable[] =
   {"fskpyramiddemod",CmdFSKdemodPyramid,1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
   {"fskparadoxdemod",CmdFSKdemodParadox,1, "Demodulate a Paradox FSK tag from GraphBuffer"},
   //{"fskrawdemod",   CmdFSKrawdemod,     1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to bin (clock = 50)(invert = 1|0)(rchigh = 10)(rclow=8)"},
+  {"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"},
   {"hide",          CmdHide,            1, "Hide graph window"},