X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b8dd1ef6490a49784c797e9312df8622445e28dd..2de26056ce3650d8ae48f30bf657e27b3669a0a3:/armsrc/lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 03bccf41..e53d0205 100644
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -14,7 +14,7 @@
 #include "usb_cdc.h"	// for usb_poll_validate_length
 #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;
@@ -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();
@@ -160,6 +163,10 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
 				continue;
 			}
 			trigger_threshold = 0;
+			if (samples_to_skip > samples_skipped) {
+				samples_skipped++;
+				continue;
+			}
 			sample_total_numbers++;
 
 			if(averaging)
@@ -218,7 +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)
 {
@@ -228,11 +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)