Refactoring of BigBuf handling in order to prepare for more efficient memory allocati...

[proxmark3-svn] / armsrc / iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 72cfbefc38717548a9f71b7da3ec1276bfa9fcfa..334eb362a4c16bfd9f0d2ce86c37102051df06b3 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -640,9 +640,9 @@ void RAMFUNC SnoopIClass(void)
     // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
-       uint8_t *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       uint8_t *readerToTagCmd = BigBuf_get_addr() + RECV_CMD_OFFSET;
     // The response (tag -> reader) that we're receiving.
-       uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t *tagToReaderResponse = BigBuf_get_addr() + RECV_RESP_OFFSET;
        
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
  
@@ -652,9 +652,9 @@ void RAMFUNC SnoopIClass(void)
     iso14a_set_trigger(FALSE);
 
     // The DMA buffer, used to stream samples from the FPGA
-    int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
+    uint8_t *dmaBuf = BigBuf_get_addr() + DMA_BUFFER_OFFSET;
     int lastRxCounter;
-    int8_t *upTo;
+    uint8_t *upTo;
     int smpl;
     int maxBehindBy = 0;
 
@@ -921,7 +921,7 @@ static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
         * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
         * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us
         *
-        * In thist mode the SOF can be written as 00011101 = 0x1D
+        * In this mode the SOF can be written as 00011101 = 0x1D
         * The EOF can be written as 10111000 = 0xb8
         * A logic 1 is 01
         * A logic 0 is 10
@@ -1065,26 +1065,26 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        //uint8_t sof = 0x0f;
 
        // Respond SOF -- takes 1 bytes
-       uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
+       uint8_t *resp1 = (BigBuf_get_addr() + FREE_BUFFER_OFFSET);
        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 2);
+       uint8_t *resp2 = (BigBuf_get_addr() + FREE_BUFFER_OFFSET + 2);
        int resp2Len;
 
        // CSN
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 30);
+       uint8_t *resp3 = (BigBuf_get_addr() + FREE_BUFFER_OFFSET + 30);
        int resp3Len;
 
        // e-Purse
        // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/byte)
-       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 60);
+       uint8_t *resp4 = (BigBuf_get_addr() + FREE_BUFFER_OFFSET + 60);
        int resp4Len;
 
        // + 1720..
-       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       uint8_t *receivedCmd = BigBuf_get_addr() + RECV_CMD_OFFSET;
        memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
        int len;
 
@@ -1215,12 +1215,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        cmdsRecvd++;
                }
                /**
-               After changes to parity calculation
-               Time between reader EOT and pm3 SOF
-               delay   21 -> 480uS
-               delay   10 -> 220us
-               delay   16 -> 388us
-               A legit tag has about 380us.
+               A legit tag has about 380us delay between reader EOT and tag SOF.
                **/
                if(modulated_response_size > 0) {
                        SendIClassAnswer(modulated_response, modulated_response_size, 1);
@@ -1534,7 +1529,7 @@ uint8_t handshakeIclassTag(uint8_t *card_data)
        static uint8_t identify[]    = { 0x0c };
        static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        static uint8_t readcheck_cc[]= { 0x88, 0x02 };
-       uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t *resp = BigBuf_get_addr() + RECV_RESP_OFFSET;
 
        uint8_t read_status = 0;
 
@@ -1655,7 +1650,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
          int keyaccess;
        } memory;
        
-       uint8_t* resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t* resp = BigBuf_get_addr() + RECV_RESP_OFFSET;
        
     setupIclassReader();