Implement Originality Signature Check in 'hf mfu info'

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 999f56bb0ed7458abfd86a0ad3b843b924525bf7..e53d02056e057c89aef2d01d04830ad087cd8ea2 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -12,9 +12,9 @@
 #include "string.h"
 #include "lfsampling.h"
 #include "usb_cdc.h"   // for usb_poll_validate_length
-//#include "ticks.h"           // for StartTicks
+#include "fpgaloader.h"
 
-sample_config config = { 1, 8, 1, 95, 0 } ;
+sample_config config = { 1, 8, 1, 95, 0, 0 } ;
 
 void printConfig()
 {
@@ -24,6 +24,7 @@ void printConfig()
        Dbprintf("  [d] decimation:        %d ", config.decimation);
        Dbprintf("  [a] averaging:         %d ", config.averaging);
        Dbprintf("  [t] trigger threshold: %d ", config.trigger_threshold);
+       Dbprintf("  [s] samples to skip:   %d ", config.samples_to_skip);
 }
 
 
@@ -34,7 +35,7 @@ void printConfig()
  * Other functions may read samples and ignore the sampling config,
  * such as functions to read the UID from a prox tag or similar.
  *
- * Values set to '0' implies no change (except for averaging)
+ * Values set to '0' implies no change (except for averaging, threshold, samples_to_skip)
  * @brief setSamplingConfig
  * @param sc
  */
@@ -44,6 +45,7 @@ void setSamplingConfig(sample_config *sc)
        if(sc->bits_per_sample!= 0) config.bits_per_sample= sc->bits_per_sample;
        if(sc->decimation!= 0) config.decimation= sc->decimation;
        if(sc->trigger_threshold != -1) config.trigger_threshold= sc->trigger_threshold;
+       if(sc->samples_to_skip != -1) config.samples_to_skip = sc->samples_to_skip;
 
        config.averaging= sc->averaging;
        if(config.bits_per_sample > 8)  config.bits_per_sample = 8;
@@ -101,7 +103,7 @@ void LFSetupFPGAForADC(int divisor, bool lf_field)
        // Give it a bit of time for the resonant antenna to settle.
        SpinDelay(50);
        // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
+       FpgaSetupSsc(FPGA_MAJOR_MODE_LF_ADC);
 }
 
 /**
@@ -119,7 +121,7 @@ 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, int bufsize, int cancel_after)
+uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold, bool silent, int bufsize, int cancel_after, int samples_to_skip)
 {
        //.
        uint8_t *dest = BigBuf_get_addr();
@@ -141,6 +143,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
        uint32_t sample_total_numbers =0 ;
        uint32_t sample_total_saved =0 ;
        uint32_t cancel_counter = 0;
+       uint32_t samples_skipped = 0;
 
        while(!BUTTON_PRESS() && !usb_poll_validate_length() ) {
                WDT_HIT();
@@ -153,11 +156,17 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
                        LED_D_OFF();
                        // threshold either high or low values 128 = center 0.  if trigger = 178 
                        if ((trigger_threshold > 0) && (sample < (trigger_threshold+128)) && (sample > (128-trigger_threshold))) { // 
-                               if (cancel_after > 0) cancel_counter++;
-                               if (cancel_after == cancel_counter) break;
+                               if (cancel_after > 0) {
+                                       cancel_counter++;
+                                       if (cancel_after == cancel_counter) break;
+                               }
                                continue;
                        }
                        trigger_threshold = 0;
+                       if (samples_to_skip > samples_skipped) {
+                               samples_skipped++;
+                               continue;
+                       }
                        sample_total_numbers++;
 
                        if(averaging)
@@ -216,7 +225,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
  */
 uint32_t DoAcquisition_default(int trigger_threshold, bool silent)
 {
-       return DoAcquisition(1,8,0,trigger_threshold,silent,0,0);
+       return DoAcquisition(1,8,0,trigger_threshold,silent,0,0,0);
 }
 uint32_t DoAcquisition_config(bool silent, int sample_size)
 {
@@ -226,11 +235,12 @@ uint32_t DoAcquisition_config(bool silent, int sample_size)
                                  ,config.trigger_threshold
                                  ,silent
                                  ,sample_size
-                                 ,0);
+                                 ,0
+                                 ,config.samples_to_skip);
 }
 
 uint32_t DoPartialAcquisition(int trigger_threshold, bool silent, int sample_size, int cancel_after) {
-       return DoAcquisition(1,8,0,trigger_threshold,silent,sample_size,cancel_after);
+       return DoAcquisition(1,8,0,trigger_threshold,silent,sample_size,cancel_after,0);
 }
 
 uint32_t ReadLF(bool activeField, bool silent, int sample_size)
@@ -264,7 +274,7 @@ uint32_t SnoopLF()
 }
 
 /**
-* acquisition of Cotag LF signal. Similart to other LF,  since the Cotag has such long datarate RF/384
+* acquisition of Cotag LF signal. Similar to other LF,  since the Cotag has such long datarate RF/384
 * and is Manchester?,  we directly gather the manchester data into bigbuff
 **/
 #define COTAG_T1 384