Add mifare crypto trace decryption utility

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 6314ac7461218e82e74fcf26b54a0c4b1cd7b987..662ebf24a1b84702d37d6ffe3c31c79693a2d483 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -13,7 +13,7 @@
 
 #include "lfsampling.h"
 
-sample_config config = { 1, 8, 1, 88, 0 } ;
+sample_config config = { 1, 8, 1, 95, 0 } ;
 
 void printConfig()
 {
@@ -62,7 +62,6 @@ typedef struct {
        uint32_t position;
 } BitstreamOut;
 
-
 /**
  * @brief Pushes bit onto the stream
  * @param stream
@@ -120,12 +119,12 @@ void LFSetupFPGAForADC(int divisor, bool lf_field)
  * @param silent - is true, now outputs are made. If false, dbprints the status
  * @return the number of bits occupied by the samples.
  */
-
-uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold,bool silent)
+uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold, bool silent)
 {
        //.
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int bufsize = BIGBUF_SIZE;
+       uint8_t *dest = BigBuf_get_addr();
+    int bufsize = BigBuf_max_traceLen();
+
        memset(dest, 0, bufsize);
 
        if(bits_per_sample < 1) bits_per_sample = 1;
@@ -151,8 +150,12 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        LED_D_OFF();
-                       if (trigger_threshold > 0 && sample < trigger_threshold)
+                       // threshold either high or low values 128 = center 0.  if trigger = 178 
+                       if ((trigger_threshold > 0) && (sample < (trigger_threshold+128)) && (sample > (128-trigger_threshold))) // 
                                continue;
+               
+                       //if (trigger_threshold > 0 && sample < trigger_threshold) // 
+                               //continue;
 
                        trigger_threshold = 0;
                        sample_total_numbers++;
@@ -224,21 +227,21 @@ uint32_t DoAcquisition_config( bool silent)
                                  ,silent);
 }
 
-uint32_t ReadLF(bool activeField)
+uint32_t ReadLF(bool activeField, bool silent)
 {
-       printConfig();
+       if (!silent) printConfig();
        LFSetupFPGAForADC(config.divisor, activeField);
        // Now call the acquisition routine
-       return DoAcquisition_config(false);
+       return DoAcquisition_config(silent);
 }
 
 /**
 * Initializes the FPGA for reader-mode (field on), and acquires the samples.
 * @return number of bits sampled
 **/
-uint32_t SampleLF()
+uint32_t SampleLF(bool printCfg)
 {
-       return ReadLF(true);
+       return ReadLF(true, printCfg);
 }
 /**
 * Initializes the FPGA for snoop-mode (field off), and acquires the samples.
@@ -247,5 +250,5 @@ uint32_t SampleLF()
 
 uint32_t SnoopLF()
 {
-       return ReadLF(false);
+       return ReadLF(false, true);
 }