typofix in prepareHF15Cmd comment based on Adrian's second patch from issue 20

[proxmark3-svn] / armsrc / iso14443.c

diff --git a/armsrc/iso14443.c b/armsrc/iso14443.c
index 0e446abe7f8d98c1d70fa309f77956407aaf6464..b8104d875fc2e4edc53c7613b80cbd534e32af31 100644 (file)
--- a/armsrc/iso14443.c
+++ b/armsrc/iso14443.c
@@ -1,12 +1,19 @@
 //-----------------------------------------------------------------------------
+// Jonathan Westhues, split Nov 2006
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
 // Routines to support ISO 14443. This includes both the reader software and
 // the `fake tag' modes. At the moment only the Type B modulation is
 // supported.
-// Jonathan Westhues, split Nov 2006
 //-----------------------------------------------------------------------------
+
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
+#include "string.h"
 
 #include "iso14443crc.h"
 
@@ -458,7 +465,7 @@ static struct {
  *          false if we are still waiting for some more
  *
  */
-static int Handle14443SamplesDemod(int ci, int cq)
+static RAMFUNC int Handle14443SamplesDemod(int ci, int cq)
 {
     int v;
 
@@ -1023,12 +1030,12 @@ void ReadSTMemoryIso14443(uint32_t parameter,uint32_t dwLast)
  * 6144-8191 : Last Received command, 2048 bytes(tag->reader) - TAG_READER_BUFFER_SIZE
  * 8192-9215 : DMA Buffer, 1024 bytes (samples) - DMA_BUFFER_SIZE
  */
-void SnoopIso14443(void)
+void RAMFUNC SnoopIso14443(void)
 {
     // We won't start recording the frames that we acquire until we trigger;
     // a good trigger condition to get started is probably when we see a
     // response from the tag.
-    int triggered = FALSE;
+    int triggered = TRUE;
 
     // The command (reader -> tag) that we're working on receiving.
     uint8_t *receivedCmd = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE;
@@ -1072,9 +1079,6 @@ void SnoopIso14443(void)
        Dbprintf("  tag -> Reader: %i bytes", TAG_READER_BUFFER_SIZE);
        Dbprintf("  DMA: %i bytes", DMA_BUFFER_SIZE);
 
-       // Use a counter for blinking the LED
-       long ledCount=0;
-       long ledFlashAt=200000;
 
     // And put the FPGA in the appropriate mode
     // Signal field is off with the appropriate LED
@@ -1089,24 +1093,17 @@ void SnoopIso14443(void)
     upTo = dmaBuf;
     lastRxCounter = DMA_BUFFER_SIZE;
     FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+               
+    LED_A_ON();
+               
     // And now we loop, receiving samples.
     for(;;) {
-               // Blink the LED while Snooping
-               ledCount++;
-               if (ledCount == ledFlashAt) {
-                       LED_D_ON();
-               }
-               if (ledCount >= 2*ledFlashAt) {
-                       LED_D_OFF();
-                       ledCount=0;
-               }
-
        int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
                                 (DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
             if(behindBy > (DMA_BUFFER_SIZE-2)) { // TODO: understand whether we can increase/decrease as we want or not?
-                Dbprintf("blew circular buffer! behindBy=%x", behindBy);
+                Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
         }
@@ -1127,7 +1124,6 @@ void SnoopIso14443(void)
 
 #define HANDLE_BIT_IF_BODY \
             if(triggered) { \
-                               ledFlashAt=30000; \
                 trace[traceLen++] = ((samples >>  0) & 0xff); \
                 trace[traceLen++] = ((samples >>  8) & 0xff); \
                 trace[traceLen++] = ((samples >> 16) & 0xff); \
@@ -1183,6 +1179,8 @@ void SnoopIso14443(void)
                        }
 
             triggered = TRUE;
+            LED_A_OFF();
+            LED_B_ON();
 
             // And ready to receive another response.
             memset(&Demod, 0, sizeof(Demod));
@@ -1198,10 +1196,12 @@ void SnoopIso14443(void)
     }
 
 done:
-       LED_D_OFF();
-    AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+       LED_A_OFF();
+       LED_B_OFF();
+       LED_C_OFF();
+  AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
        DbpString("Snoop statistics:");
-    Dbprintf("  Max behind by: %i", maxBehindBy);
+  Dbprintf("  Max behind by: %i", maxBehindBy);
        Dbprintf("  Uart State: %x", Uart.state);
        Dbprintf("  Uart ByteCnt: %i", Uart.byteCnt);
        Dbprintf("  Uart ByteCntMax: %i", Uart.byteCntMax);