add offset option to data printdemodbuffer

easily see demod buffer's hex values at different bit offsets by using:
data printdemodbuffer x o <offset>

diff --git a/client/cmddata.c b/client/cmddata.c
index b9069bc19cb82b150b05de62345a188a56e5f6aa..e23b6d5979b1759aa7608e73684440f73a8032ec 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -55,6 +55,15 @@ int CmdSetDebugMode(const char *Cmd)
        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)
 {
@@ -73,23 +82,50 @@ void printDemodBuff(void)
 
 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 = DemodBuffer + offset;
+               numBits = binarraytohex(hex, buf, numBits);
                if (numBits==0) return 0;
-               PrintAndLog("DemodBuffer: %s",printBuff);
+               PrintAndLog("DemodBuffer: %s",hex);             
        } else {
-               printDemodBuff();
+               //setDemodBuf(DemodBuffer, DemodBufferLen-offset, offset);
+               char *bin = sprint_bin_break(DemodBuffer+offset,numBits,16);
+               PrintAndLog("DemodBuffer:\n%s",bin);
        }
        return 1;
 }
@@ -2182,7 +2218,7 @@ 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)"},
-       {"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"},