text cleanup t55xx cmds

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index 556ede06b5687f150187ec4162b41e2c0e107548..22da18053c4f80b35e899dbf029c67454e43111a 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -23,10 +23,12 @@
 #include "lfdemod.h"
 #include "usb_cmd.h"
 #include "crc.h"
 #include "lfdemod.h"
 #include "usb_cmd.h"
 #include "crc.h"

+#include "crc16.h"
+#include "loclass/cipherutils.h"

 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];

-uint8_t g_debugMode;
-int DemodBufferLen;
+uint8_t g_debugMode=0;
+size_t DemodBufferLen=0;

 static int CmdHelp(const char *Cmd);
 
 //set the demod buffer with given array of binary (one bit per byte)
 static int CmdHelp(const char *Cmd);
 
 //set the demod buffer with given array of binary (one bit per byte)


@@ -55,6 +57,15 @@ int CmdSetDebugMode(const char *Cmd)
        return 1;
 }
 
        return 1;
 }
 

+int usage_data_printdemodbuf(){
+               PrintAndLog("Usage: data printdemodbuffer x o <offset>");
+               PrintAndLog("Options:        ");
+               PrintAndLog("       h          This help");
+               PrintAndLog("       x          output in hex (omit for binary output)");
+               PrintAndLog("       o <offset> enter offset in # of bits");
+               return 0;       
+}
+

 //by marshmellow
 void printDemodBuff(void)
 {
 //by marshmellow
 void printDemodBuff(void)
 {


@@ -73,23 +84,50 @@ void printDemodBuff(void)
 
 int CmdPrintDemodBuff(const char *Cmd)
 {
 
 int CmdPrintDemodBuff(const char *Cmd)
 {

-       char hex;
-       char printBuff[512]={0x00};
-       uint8_t numBits = DemodBufferLen & 0xFFFC;
-       sscanf(Cmd, "%c", &hex);
-       if (hex == 'h'){
-               PrintAndLog("Usage: data printdemodbuffer [x]");
-               PrintAndLog("Options:        ");
-               PrintAndLog("       h       This help");
-               PrintAndLog("       x       output in hex (omit for binary output)");
-               return 0;
+       char hex[512]={0x00};
+       bool hexMode = false;
+       bool errors = false;
+       uint8_t offset = 0;
+       char cmdp = 0;
+       while(param_getchar(Cmd, cmdp) != 0x00)
+       {
+               switch(param_getchar(Cmd, cmdp))
+               {
+               case 'h':
+               case 'H':
+                       return usage_data_printdemodbuf();
+               case 'x':
+               case 'X':
+                       hexMode = true;
+                       cmdp++;
+                       break;
+               case 'o':
+               case 'O':
+                       offset = param_get8(Cmd, cmdp+1);
+                       if (!offset) errors = true;
+                       cmdp += 2;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if(errors) break;

        }
        }

-       if (hex == 'x'){
-               numBits = binarraytohex(printBuff, (char *)DemodBuffer, numBits);
+       //Validations
+       if(errors) return usage_data_printdemodbuf();
+
+       int numBits = (DemodBufferLen-offset) & 0x7FC; //make sure we don't exceed our string
+
+       if (hexMode){
+               char *buf = (char *) (DemodBuffer + offset);
+               numBits = binarraytohex(hex, buf, numBits);

                if (numBits==0) return 0;
                if (numBits==0) return 0;

-               PrintAndLog("DemodBuffer: %s",printBuff);
+               PrintAndLog("DemodBuffer: %s",hex);             

        } else {
        } else {

-               printDemodBuff();
+               //setDemodBuf(DemodBuffer, DemodBufferLen-offset, offset);
+               char *bin = sprint_bin_break(DemodBuffer+offset,numBits,16);
+               PrintAndLog("DemodBuffer:\n%s",bin);

        }
        return 1;
 }
        }
        return 1;
 }


@@ -307,8 +345,8 @@ int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType)
        setDemodBuf(BitStream,BitLen,0);
        if (verbose || g_debugMode){
                if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
        setDemodBuf(BitStream,BitLen,0);
        if (verbose || g_debugMode){
                if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);

-               if (askType) PrintAndLog("ASK/Manchester decoded bitstream:");
-               else PrintAndLog("ASK/Raw decoded bitstream:");
+               if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
+               else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);

                // Now output the bitstream to the scrollback by line of 16 bits
                printDemodBuff();
                
                // Now output the bitstream to the scrollback by line of 16 bits
                printDemodBuff();
                


@@ -355,7 +393,7 @@ int Cmdmandecoderaw(const char *Cmd)
        int errCnt=0;
        size_t size=0;
        int invert=0;
        int errCnt=0;
        size_t size=0;
        int invert=0;

-       size_t maxErr = 20;
+       int maxErr = 20;

        char cmdp = param_getchar(Cmd, 0);
        if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
                PrintAndLog("Usage:  data manrawdecode [invert] [maxErr]");
        char cmdp = param_getchar(Cmd, 0);
        if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
                PrintAndLog("Usage:  data manrawdecode [invert] [maxErr]");


@@ -461,22 +499,20 @@ int CmdBiphaseDecodeRaw(const char *Cmd)
 int ASKbiphaseDemod(const char *Cmd, bool verbose)
 {
        //ask raw demod GraphBuffer first
 int ASKbiphaseDemod(const char *Cmd, bool verbose)
 {
        //ask raw demod GraphBuffer first

-       int offset=0, clk=0, invert=0, maxErr=0, ans=0;
-       ans = sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
-       if (ans>0)
-               ans = ASKDemod(Cmd+1, FALSE, FALSE, 0);
-       else
-               ans = ASKDemod(Cmd, FALSE, FALSE, 0);
-       if (!ans) {
-               if (g_debugMode || verbose) PrintAndLog("Error AskDemod: %d", ans);
-               return 0;
-       }
+       int offset=0, clk=0, invert=0, maxErr=0;
+       sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
+
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];     
+       size_t size = getFromGraphBuf(BitStream);         
+       //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);  
+       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 DemodBuffer
-       size_t size = DemodBufferLen;
-       uint8_t BitStream[MAX_DEMOD_BUF_LEN];
-       memcpy(BitStream, DemodBuffer, DemodBufferLen); 
-       int errCnt = BiphaseRawDecode(BitStream, &size, offset, 0);
+       //attempt to Biphase decode BitStream
+       errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);

        if (errCnt < 0){
                if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
                return 0;
        if (errCnt < 0){
                if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
                return 0;


@@ -488,7 +524,7 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
        //success set DemodBuffer and return
        setDemodBuf(BitStream, size, 0);
        if (g_debugMode || verbose){
        //success set DemodBuffer and return
        setDemodBuf(BitStream, size, 0);
        if (g_debugMode || verbose){

-               PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
+               PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);

                printDemodBuff();
        }
        return 1;
                printDemodBuff();
        }
        return 1;


@@ -1421,6 +1457,83 @@ int CmdFSKdemodPyramid(const char *Cmd)
        return 1;
 }
 
        return 1;
 }
 

+// FDX-B ISO11784/85 demod  (aka animal tag)  BIPHASE, inverted, rf/32,  with preamble of 00000000001 (128bits)
+// 8 databits + 1 parity (1)
+// CIITT 16 chksum
+// NATIONAL CODE, ICAR database
+// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
+// FLAG (animal/non-animal)
+int CmdFDXBdemodBI(const char *Cmd){
+
+       int invert = 1;
+       int clk = 32;           
+       int errCnt = 0;
+       int maxErr = 0;
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];   
+       size_t size = getFromGraphBuf(BitStream);       
+       
+       errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
+       if ( errCnt < 0 || errCnt > maxErr ) { 
+               if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
+               return 0;
+       }
+
+       errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
+       if (errCnt < 0 || errCnt > maxErr ) {
+               if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+               return 0;
+       } 
+
+       int preambleIndex = FDXBdemodBI(BitStream, &size);
+       if (preambleIndex < 0){
+               if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
+               return 0;
+       }
+
+       setDemodBuf(BitStream, 128, preambleIndex);
+
+       // remove marker bits (1's every 9th digit after preamble) (pType = 2)
+       size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
+       if ( size != 104 ) {
+               if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
+               return 0;
+       }
+       if (g_debugMode) {
+               char *bin = sprint_bin_break(BitStream,size,16);
+               PrintAndLog("DEBUG BinStream:\n%s",bin);
+       }
+       PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
+       if (g_debugMode) PrintAndLog("Start marker %d;   Size %d", preambleIndex, size);
+
+       //got a good demod
+       uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
+       uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
+       uint8_t dataBlockBit = BitStream[48];
+       uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
+       uint8_t animalBit = BitStream[63];
+       uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
+       uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
+
+       uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
+       uint8_t raw[8];
+       num_to_bytes(rawid, 8, raw);
+
+       if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
+
+       uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
+       PrintAndLog("Animal ID:     %04u-%012llu", countryCode, NationalCode);
+       PrintAndLog("National Code: %012llu", NationalCode);
+       PrintAndLog("CountryCode:   %04u", countryCode);
+       PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
+       PrintAndLog("reserved Code: %u", reservedCode);
+       PrintAndLog("Animal Tag:    %s", animalBit ? "True" : "False");
+       PrintAndLog("CRC:           0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
+       PrintAndLog("Extended:      0x%X\n", extended);
+       
+       return 1;
+}
+
+

 //by marshmellow
 //attempt to psk1 demod graph buffer
 int PSKDemod(const char *Cmd, bool verbose)
 //by marshmellow
 //attempt to psk1 demod graph buffer
 int PSKDemod(const char *Cmd, bool verbose)


@@ -1434,12 +1547,12 @@ int PSKDemod(const char *Cmd, bool verbose)
                clk=0;
        }
        if (invert != 0 && invert != 1) {
                clk=0;
        }
        if (invert != 0 && invert != 1) {

-               if (verbose) PrintAndLog("Invalid argument: %s", Cmd);
+               if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);

                return 0;
        }
        uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
        size_t BitLen = getFromGraphBuf(BitStream);
                return 0;
        }
        uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
        size_t BitLen = getFromGraphBuf(BitStream);

-       if (BitLen==0) return -1;
+       if (BitLen==0) return 0;

        uint8_t carrier=countFC(BitStream, BitLen, 0);
        if (carrier!=2 && carrier!=4 && carrier!=8){
                //invalid carrier
        uint8_t carrier=countFC(BitStream, BitLen, 0);
        if (carrier!=2 && carrier!=4 && carrier!=8){
                //invalid carrier


@@ -1484,7 +1597,7 @@ int CmdIndalaDecode(const char *Cmd)
                return 0;
        }
        uint8_t invert=0;
                return 0;
        }
        uint8_t invert=0;

-       ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
+       ans = indala26decode(DemodBuffer, &DemodBufferLen, &invert);

        if (ans < 1) {
                if (g_debugMode==1)
                        PrintAndLog("Error2: %d",ans);
        if (ans < 1) {
                if (g_debugMode==1)
                        PrintAndLog("Error2: %d",ans);


@@ -1831,26 +1944,14 @@ int CmdHpf(const char *Cmd)
        RepaintGraphWindow();
        return 0;
 }
        RepaintGraphWindow();
        return 0;
 }

-typedef struct {
-       uint8_t * buffer;
-       uint32_t numbits;
-       uint32_t position;
-}BitstreamOut;
-
-bool _headBit( BitstreamOut *stream)
-{
-       int bytepos = stream->position >> 3; // divide by 8
-       int bitpos = (stream->position++) & 7; // mask out 00000111
-       return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
-}

 
 

-uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
+uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)

 {
        int i;
        uint8_t val = 0;
        for(i =0 ; i < bits_per_sample; i++)
        {
 {
        int i;
        uint8_t val = 0;
        for(i =0 ; i < bits_per_sample; i++)
        {

-               val |= (_headBit(b) << (7-i));
+               val |= (headBit(b) << (7-i));

        }
        return val;
 }
        }
        return val;
 }


@@ -1890,9 +1991,9 @@ int getSamples(const char *Cmd, bool silent)
        if(bits_per_sample < 8)
        {
                PrintAndLog("Unpacking...");
        if(bits_per_sample < 8)
        {
                PrintAndLog("Unpacking...");

-               BitstreamOut bout = { got, bits_per_sample * n,  0};
+               BitstreamIn bout = { got, bits_per_sample * n,  0};

                int j =0;
                int j =0;

-               for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
+               for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {

                        uint8_t sample = getByte(bits_per_sample, &bout);
                        GraphBuffer[j] = ((int) sample )- 128;
                }
                        uint8_t sample = getByte(bits_per_sample, &bout);
                        GraphBuffer[j] = ((int) sample )- 128;
                }


@@ -2153,6 +2254,99 @@ int CmdZerocrossings(const char *Cmd)
        return 0;
 }
 
        return 0;
 }
 

+int usage_data_bin2hex(){
+               PrintAndLog("Usage: data bin2hex <binary_digits>");
+               PrintAndLog("       This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
+               return 0;
+}
+
+/**
+ * @brief Utility for conversion via cmdline.
+ * @param Cmd
+ * @return
+ */
+int Cmdbin2hex(const char *Cmd)
+{
+       int bg =0, en =0;
+       if(param_getptr(Cmd, &bg, &en, 0))
+       {
+               return usage_data_bin2hex();
+       }
+       //Number of digits supplied as argument
+       size_t length = en  - bg +1;
+       size_t bytelen = (length+7) / 8;
+       uint8_t* arr = (uint8_t *) malloc(bytelen);
+       memset(arr, 0, bytelen);
+       BitstreamOut bout = { arr, 0, 0 };
+
+       for(; bg <= en ;bg++)
+       {
+               char c = Cmd[bg];
+               if( c == '1')   pushBit(&bout, 1);
+               else if( c == '0')      pushBit(&bout, 0);
+               else PrintAndLog("Ignoring '%c'", c);
+       }
+
+       if(bout.numbits % 8 != 0)
+       {
+               printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
+       }
+
+       //Uses printf instead of PrintAndLog since the latter
+       // adds linebreaks to each printout - this way was more convenient since we don't have to
+       // allocate a string and write to that first...
+       for(size_t x = 0; x  < bytelen ; x++)
+       {
+               printf("%02X", arr[x]);
+       }
+       printf("\n");
+       free(arr);
+       return 0;
+}
+
+int usage_data_hex2bin(){
+
+       PrintAndLog("Usage: data bin2hex <binary_digits>");
+       PrintAndLog("       This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
+       return 0;
+
+}
+
+int Cmdhex2bin(const char *Cmd)
+{
+       int bg =0, en =0;
+       if(param_getptr(Cmd, &bg, &en, 0))
+       {
+               return usage_data_hex2bin();
+       }
+
+
+       while(bg <= en )
+       {
+               char x = Cmd[bg++];
+               // capitalize
+               if (x >= 'a' && x <= 'f')
+                       x -= 32;
+               // convert to numeric value
+               if (x >= '0' && x <= '9')
+                       x -= '0';
+               else if (x >= 'A' && x <= 'F')
+                       x -= 'A' - 10;
+               else
+                       continue;
+
+               //Uses printf instead of PrintAndLog since the latter
+               // adds linebreaks to each printout - this way was more convenient since we don't have to
+               // allocate a string and write to that first...
+
+               for(int i= 0 ; i < 4 ; ++i)
+                       printf("%d",(x >> (3 - i)) & 1);
+       }
+       printf("\n");
+
+       return 0;
+}
+

 static command_t CommandTable[] =
 {
        {"help",            CmdHelp,            1, "This help"},
 static command_t CommandTable[] =
 {
        {"help",            CmdHelp,            1, "This help"},


@@ -2161,10 +2355,12 @@ static command_t CommandTable[] =
        {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
        {"autocorr",        CmdAutoCorr,        1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
        {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
        {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
        {"autocorr",        CmdAutoCorr,        1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
        {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},

+       {"bin2hex",         Cmdbin2hex,         1, "bin2hex <digits>     -- Converts binary to hexadecimal"},

        {"bitsamples",      CmdBitsamples,      0, "Get raw samples as bitstring"},
        {"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)"},
        {"bitsamples",      CmdBitsamples,      0, "Get raw samples as bitstring"},
        {"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)"},

+       {"fdxbdemod",       CmdFDXBdemodBI    , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},

        {"fskawiddemod",    CmdFSKdemodAWID,    1, "Demodulate an AWID FSK tag from GraphBuffer"},
        //{"fskfcdetect",   CmdFSKfcDetect,     1, "Try to detect the Field Clock of an FSK wave"},
        {"fskhiddemod",     CmdFSKdemodHID,     1, "Demodulate a HID FSK tag from GraphBuffer"},
        {"fskawiddemod",    CmdFSKdemodAWID,    1, "Demodulate an AWID FSK tag from GraphBuffer"},
        //{"fskfcdetect",   CmdFSKfcDetect,     1, "Try to detect the Field Clock of an FSK wave"},
        {"fskhiddemod",     CmdFSKdemodHID,     1, "Demodulate a HID FSK tag from GraphBuffer"},


@@ -2174,6 +2370,7 @@ static command_t CommandTable[] =
        {"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"},
        {"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"},

+       {"hex2bin",         Cmdhex2bin,         1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},

        {"hide",            CmdHide,            1, "Hide graph window"},
        {"hpf",             CmdHpf,             1, "Remove DC offset from trace"},
        {"load",            CmdLoad,            1, "<filename> -- Load trace (to graph window"},
        {"hide",            CmdHide,            1, "Hide graph window"},
        {"hpf",             CmdHpf,             1, "Remove DC offset from trace"},
        {"load",            CmdLoad,            1, "<filename> -- Load trace (to graph window"},


@@ -2182,7 +2379,7 @@ static command_t CommandTable[] =
        {"manrawdecode",    Cmdmandecoderaw,    1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
        {"norm",            CmdNorm,            1, "Normalize max/min to +/-128"},
        {"plot",            CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},
        {"manrawdecode",    Cmdmandecoderaw,    1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
        {"norm",            CmdNorm,            1, "Normalize max/min to +/-128"},
        {"plot",            CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},

-       {"printdemodbuffer",CmdPrintDemodBuff,  1, "[x] -- print the data in the DemodBuffer - 'x' for hex output"},
+       {"printdemodbuffer",CmdPrintDemodBuff,  1, "[x] [o] <offset> -- print the data in the DemodBuffer - 'x' for hex output"},

        {"pskindalademod",  CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
        {"psknexwatchdemod",CmdPSKNexWatch,     1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
        {"rawdemod",        CmdRawDemod,        1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},  
        {"pskindalademod",  CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
        {"psknexwatchdemod",CmdPSKNexWatch,     1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
        {"rawdemod",        CmdRawDemod,        1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},