CHG: minor code clean up.

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index a7312d21b81a21a148c7cfe1e0e95f5b4db021d3..32a0ff7c68d9f55f56ece3ba7324f602219143b2 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -11,9 +11,9 @@
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>
-//#include "proxusb.h"
 #include "proxmark3.h"
 #include "ui.h"
+#include "util.h"
 #include "graph.h"
 #include "cmdparser.h"
 #include "cmddata.h"
@@ -22,6 +22,16 @@
 
 static int CmdHelp(const char *Cmd);
 
+int CmdEMdemodASK(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       int findone = (cmdp == '1') ? 1 : 0;    
+  UsbCommand c={CMD_EM410X_DEMOD};
+  c.arg[0]=findone;
+  SendCommand(&c);
+  return 0;
+}
+
 /* Read the ID of an EM410x tag.
  * Format:
  *   1111 1111 1           <-- standard non-repeatable header
@@ -34,8 +44,8 @@ int CmdEM410xRead(const char *Cmd)
 {
   int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
   int parity[4];
-  char id[11];
-  char id2[11];
+  char id[11] = {0x00};
+  char id2[11] = {0x00};
   int retested = 0;
   uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
   high = low = 0;
@@ -187,7 +197,25 @@ retest:
  */
 int CmdEM410xSim(const char *Cmd)
 {
-  int i, n, j, h, binary[4], parity[4];
+       int i, n, j, binary[4], parity[4];
+
+       char cmdp = param_getchar(Cmd, 0);
+       uint8_t uid[5] = {0x00};
+
+       if (cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  lf em4x 410xsim <UID>");
+               PrintAndLog("");
+               PrintAndLog("     sample: lf em4x 410xsim 0F0368568B");
+               return 0;
+       }
+
+       if (param_gethex(Cmd, 0, uid, 10)) {
+               PrintAndLog("UID must include 10 HEX symbols");
+               return 0;
+       }
+       
+       PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
+       PrintAndLog("Press pm3-button to about simulation");
 
   /* clock is 64 in EM410x tags */
   int clock = 64;
@@ -195,9 +223,6 @@ int CmdEM410xSim(const char *Cmd)
   /* clear our graph */
   ClearGraph(0);
 
-  /* write it out a few times */
-  for (h = 0; h < 4; h++)
-  {
     /* write 9 start bits */
     for (i = 0; i < 9; i++)
       AppendGraph(0, clock, 1);
@@ -234,38 +259,38 @@ int CmdEM410xSim(const char *Cmd)
     AppendGraph(0, clock, parity[3]);
 
     /* stop bit */
-    AppendGraph(0, clock, 0);
-  }
-
-  /* modulate that biatch */
-  CmdManchesterMod("");
-
-  /* booyah! */
-  RepaintGraphWindow();
-  
-  CmdLFSim("");
+  AppendGraph(1, clock, 0);
+ 
+  CmdLFSim("240"); //240 start_gap.
   return 0;
 }
 
-/* Function is equivalent of loread + losamples + em410xread
- * looped until an EM410x tag is detected */
+/* Function is equivalent of lf read + data samples + em410xread
+ * looped until an EM410x tag is detected 
+ * 
+ * Why is CmdSamples("16000")?
+ *  TBD: Auto-grow sample size based on detected sample rate.  IE: If the
+ *       rate gets lower, then grow the number of samples
+ *  Changed by martin, 4000 x 4 = 16000, 
+ *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
+
+*/
 int CmdEM410xWatch(const char *Cmd)
 {
-  int read_h = (*Cmd == 'h');
-  do
-  {
-    CmdLFRead(read_h ? "h" : "");
-    // 2000 samples is OK for clock=64, but not clock=32.  Probably want
-               //   8000 for clock=16.  Don't want to go too high since old HID driver
-               //   is very slow
-               // TBD: Auto-grow sample size based on detected sample rate.  IE: If the
-               //   rate gets lower, then grow the number of samples
-
-    // Changed by martin, 4000 x 4 = 16000, 
-    // see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
-               CmdSamples("16000");
- } while ( ! CmdEM410xRead(""));
-  return 0;
+       char cmdp = param_getchar(Cmd, 0);
+       int read_h = (cmdp == 'h');
+       do {
+               if (ukbhit()) {
+                       printf("\naborted via keyboard!\n");
+                       break;
+               }
+               
+               CmdLFRead(read_h ? "h" : "");
+               CmdSamples("6000");             
+       } while (
+               !CmdEM410xRead("") 
+       );
+       return 0;
 }
 
 /* Read the transmitted data of an EM4x50 tag
@@ -319,7 +344,7 @@ int CmdEM4x50Read(const char *Cmd)
       ++i;
     while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
       ++i;
-    if (j>(MAX_GRAPH_TRACE_LEN/64)) {
+    if (j>=(MAX_GRAPH_TRACE_LEN/64)) {
       break;
     }
     tmpbuff[j++]= i - start;
@@ -581,6 +606,7 @@ int CmdWriteWordPWD(const char *Cmd)
 static command_t CommandTable[] =
 {
   {"help", CmdHelp, 1, "This help"},
+  {"em410xdemod", CmdEMdemodASK, 0, "[clock rate] -- Extract ID from EM410x tag"},  
   {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
   {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
   {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},