Fixed problem with em4100, see http://www.proxmark.org/forum/viewtopic.php?pid=7235...

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 8d4e2dc9c84e903e23d9051cde65eaafd6f07cac..17d293edcd6925b432a56fdb45854dd061e3a3a7 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -1175,6 +1175,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
        uint64_t rev_id = 0;    // reversed ID
        int c_parity[4];        // column parity
        int r_parity = 0;       // row parity
+       uint32_t clock = 0;
 
        // Reverse ID bits given as parameter (for simpler operations)
        for (i = 0; i < EM410X_ID_LENGTH; ++i) {
@@ -1232,12 +1233,35 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
        T55xxWriteBlock((uint32_t)id, 2, 0, 0);
 
        // Config for EM410x (RF/64, Manchester, Maxblock=2)
-       if (card)
+       if (card) {
+               // Clock rate is stored in bits 8-15 of the card value
+               clock = (card & 0xFF00) >> 8;
+               Dbprintf("Clock rate: %d", clock);
+               switch (clock)
+               {
+                       case 32:
+                               clock = T55x7_BITRATE_RF_32;
+                               break;
+                       case 16:
+                               clock = T55x7_BITRATE_RF_16;
+                               break;
+                       case 0:
+                               // A value of 0 is assumed to be 64 for backwards-compatibility
+                               // Fall through...
+                       case 64:
+                               clock = T55x7_BITRATE_RF_64;
+                               break;      
+                       default:
+                               Dbprintf("Invalid clock rate: %d", clock);
+                               return;
+               }
+
                // Writing configuration for T55x7 tag
-               T55xxWriteBlock(T55x7_BITRATE_RF_64         |
+               T55xxWriteBlock(clock       |
                                T55x7_MODULATION_MANCHESTER |
                                2 << T55x7_MAXBLOCK_SHIFT,
                                0, 0, 0);
+  }
        else
                // Writing configuration for T5555(Q5) tag
                T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |