HitagS Improvements (#721)

[proxmark3-svn] / armsrc / BigBuf.c

diff --git a/armsrc/BigBuf.c b/armsrc/BigBuf.c
index a5fcea7d288515227fa6af5ca015efef69578459..4b1264b6684abc375af7c0ca51967a82fc6730ab 100644 (file)
--- a/armsrc/BigBuf.c
+++ b/armsrc/BigBuf.c
@@ -18,6 +18,14 @@
 // BigBuf is the large multi-purpose buffer, typically used to hold A/D samples or traces.
 // Also used to hold various smaller buffers and the Mifare Emulator Memory.
 
+/* BigBuf memory layout:
+Pointer to highest available memory: BigBuf_hi
+
+    high BIGBUF_SIZE
+    reserved = BigBuf_malloc()  subtracts amount from BigBuf_hi,   
+       low  0x00
+*/
+
 // declare it as uint32_t to achieve alignment to 4 Byte boundary
 static uint32_t BigBuf[BIGBUF_SIZE/sizeof(uint32_t)];
 
@@ -41,7 +49,8 @@ uint8_t *BigBuf_get_addr(void)
 // get the address of the emulator memory. Allocate part of Bigbuf for it, if not yet done
 uint8_t *BigBuf_get_EM_addr(void)
 {
-       if (emulator_memory == NULL) {          // not yet allocated
+       // not yet allocated
+       if (emulator_memory == NULL) {
                emulator_memory = BigBuf_malloc(CARD_MEMORY_SIZE);
        }
        
@@ -61,6 +70,9 @@ void BigBuf_Clear_ext(bool verbose)
        if (verbose) 
                Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
 }
+void BigBuf_Clear_EM(void){
+       memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE);
+}
 
 void BigBuf_Clear_keep_EM(void)
 {
@@ -103,7 +115,7 @@ void BigBuf_print_status(void)
 {
        Dbprintf("Memory");
        Dbprintf("  BIGBUF_SIZE.............%d", BIGBUF_SIZE);
-       Dbprintf("  BigBuf_hi  .............%d", BigBuf_hi);
+       Dbprintf("  Available memory........%d", BigBuf_hi);
        Dbprintf("Tracing");
        Dbprintf("  tracing ................%d", tracing);
        Dbprintf("  traceLen ...............%d", traceLen);
@@ -124,6 +136,10 @@ void set_tracing(bool enable) {
        tracing = enable;
 }
 
+bool get_tracing(void) {
+       return tracing;
+}
+
 /**
  * Get the number of bytes traced
  * @return
@@ -142,7 +158,7 @@ uint16_t BigBuf_get_traceLen(void)
 **/
 bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag)
 {
-       if (!tracing) return FALSE;
+       if (!tracing) return false;
 
        uint8_t *trace = BigBuf_get_addr();
 
@@ -153,8 +169,8 @@ bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_
        uint16_t max_traceLen = BigBuf_max_traceLen();
 
        if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= max_traceLen) {
-               tracing = FALSE;        // don't trace any more
-               return FALSE;
+               tracing = false;        // don't trace any more
+               return false;
        }
        // Traceformat:
        // 32 bits timestamp (little endian)
@@ -198,7 +214,7 @@ bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_
        }
        traceLen += num_paritybytes;
 
-       return TRUE;
+       return true;
 }
 
 
@@ -209,12 +225,15 @@ int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwP
          that this logger takes number of bits as argument, not number of bytes.
          **/
 
-       if (!tracing) return FALSE;
+       if (!tracing) return false;
 
        uint8_t *trace = BigBuf_get_addr();
        uint16_t iLen = nbytes(iBits);
+
        // Return when trace is full
-       if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) return FALSE;
+       if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) {
+               return false;
+       }       
 
        //Hitag traces appear to use this traceformat:
        // 32 bits timestamp (little endian,Highest Bit used as readerToTag flag)
@@ -222,6 +241,8 @@ int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwP
        // 8 bits size (number of bits in the trace entry, not number of bytes)
        // y Bytes data
 
+
+
        rsamples += iSamples;
        trace[traceLen++] = ((rsamples >> 0) & 0xff);
        trace[traceLen++] = ((rsamples >> 8) & 0xff);
@@ -241,19 +262,17 @@ int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwP
        memcpy(trace + traceLen, btBytes, iLen);
        traceLen += iLen;
 
-       return TRUE;
+       return true;
 }
 
 
 // Emulator memory
 uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length){
        uint8_t* mem = BigBuf_get_EM_addr();
-       if(offset+length < CARD_MEMORY_SIZE)
-       {
+       if (offset+length < CARD_MEMORY_SIZE) {
                memcpy(mem+offset, data, length);
                return 0;
-       }else
-       {
+       } else {
                Dbprintf("Error, trying to set memory outside of bounds! %d  > %d", (offset+length), CARD_MEMORY_SIZE);
                return 1;
        }