X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/bed24f53c265a793a0053580fe31dbcb2f6e7696..refs/pull/938/head:/armsrc/lfsampling.c?ds=sidebyside

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 04c42116..e0764063 100644
--- 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);
 }
 
 
@@ -34,20 +35,21 @@ 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
  */
-void setSamplingConfig(sample_config *sc)
-{
-	if(sc->divisor != 0) config.divisor = sc->divisor;
-	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;
+void setSamplingConfig(uint8_t *config_data) {
+	sample_config *sc = (sample_config *)config_data;
+	if (sc->divisor != 0) config.divisor = sc->divisor;
+	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;
-	if(config.decimation < 1)	config.decimation = 1;
+	if (config.bits_per_sample > 8)	config.bits_per_sample = 8;
+	if (config.decimation < 1)	config.decimation = 1;
 
 	printConfig();
 }
@@ -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)
+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();
@@ -140,6 +142,8 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
 	uint32_t sample_sum =0 ;
 	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();
@@ -151,10 +155,18 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
 			sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
 			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 ((trigger_threshold > 0) && (sample < (trigger_threshold+128)) && (sample > (128-trigger_threshold))) { // 
+				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)
@@ -213,37 +225,39 @@ 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);
+	return DoAcquisition(1,8,0,trigger_threshold,silent,0,0,0);
 }
-uint32_t DoAcquisition_config( bool silent)
+uint32_t DoAcquisition_config(bool silent, int sample_size)
 {
 	return DoAcquisition(config.decimation
 				  ,config.bits_per_sample
 				  ,config.averaging
 				  ,config.trigger_threshold
 				  ,silent
-				  ,0);
+				  ,sample_size
+				  ,0
+				  ,config.samples_to_skip);
 }
 
-uint32_t DoPartialAcquisition(int trigger_threshold, bool silent, int sample_size) {
-	return DoAcquisition(1,8,0,trigger_threshold,silent,sample_size);
+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,0);
 }
 
-uint32_t ReadLF(bool activeField, bool silent)
+uint32_t ReadLF(bool activeField, bool silent, int sample_size)
 {
 	if (!silent) printConfig();
 	LFSetupFPGAForADC(config.divisor, activeField);
 	// Now call the acquisition routine
-	return DoAcquisition_config(silent);
+	return DoAcquisition_config(silent, sample_size);
 }
 
 /**
 * Initializes the FPGA for reader-mode (field on), and acquires the samples.
 * @return number of bits sampled
 **/
-uint32_t SampleLF(bool printCfg)
+uint32_t SampleLF(bool printCfg, int sample_size)
 {
-	uint32_t ret = ReadLF(true, printCfg);
+	uint32_t ret = ReadLF(true, printCfg, sample_size);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	return ret;
 }
@@ -254,13 +268,13 @@ uint32_t SampleLF(bool printCfg)
 
 uint32_t SnoopLF()
 {
-	uint32_t ret = ReadLF(false, true);
+	uint32_t ret = ReadLF(false, true, 0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	return ret;
 }
 
 /**
-* 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
@@ -329,8 +343,8 @@ uint32_t doCotagAcquisitionManchester() {
 	uint8_t sample = 0, firsthigh = 0, firstlow = 0; 
 	uint16_t sample_counter = 0, period = 0;
 	uint8_t curr = 0, prev = 0;
-
-	while (!BUTTON_PRESS() && !usb_poll_validate_length() && (sample_counter < bufsize) ) {
+	uint16_t noise_counter = 0;
+	while (!BUTTON_PRESS() && !usb_poll_validate_length() && (sample_counter < bufsize) && (noise_counter < (COTAG_T1<<1)) ) {
 		WDT_HIT();
 		if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
 			AT91C_BASE_SSC->SSC_THR = 0x43;
@@ -343,14 +357,20 @@ uint32_t doCotagAcquisitionManchester() {
 
 			// find first peak
 			if ( !firsthigh ) {
-				if (sample < COTAG_ONE_THRESHOLD) 
+				if (sample < COTAG_ONE_THRESHOLD) {
+					noise_counter++;
 					continue;
+				}
+				noise_counter = 0;
 				firsthigh = 1;
 			}
 
 			if ( !firstlow ){
-				if (sample > COTAG_ZERO_THRESHOLD )
+				if (sample > COTAG_ZERO_THRESHOLD ) {
+					noise_counter++;
 					continue;
+				}
+				noise_counter=0;
 				firstlow = 1;
 			}