fix 'hf iclass snoop'

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index aff31e9eaf28d86db3663bb2a6e7341c051b0e07..e0764063da3d33c078bb854f1b939fe5bd8695ce 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 "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()
 {
 
 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("  [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.
  *
  * 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
  */
  * @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;
 
        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();
 }
 
        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.
        // 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.
  */
  * @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();
 {
        //.
        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 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();
 
        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 
                        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;
                                continue;

-               
+                       }

                        trigger_threshold = 0;
                        trigger_threshold = 0;

+                       if (samples_to_skip > samples_skipped) {
+                               samples_skipped++;
+                               continue;
+                       }

                        sample_total_numbers++;
 
                        if(averaging)
                        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)
 {
  */
 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
 {
        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
 {
        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
 **/
 }
 
 /**
 * 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;
 }
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        return ret;
 }


@@ -254,80 +268,13 @@ uint32_t SampleLF(bool printCfg)
 
 uint32_t SnoopLF()
 {
 
 uint32_t SnoopLF()
 {

-       uint32_t ret = ReadLF(false, true);
+       uint32_t ret = ReadLF(false, true, 0);

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        return ret;
 }
 
 /**
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        return ret;
 }
 
 /**

-* acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
-* the data is collected in BigBuf.
-**/
-void doT55x7Acquisition(size_t sample_size) {
-
-       #define T55xx_READ_UPPER_THRESHOLD 128+60  // 60 grph
-       #define T55xx_READ_LOWER_THRESHOLD 128-60  // -60 grph
-       #define T55xx_READ_TOL   5
-
-       uint8_t *dest = BigBuf_get_addr();
-       uint16_t bufsize = BigBuf_max_traceLen();
-       
-       if ( bufsize > sample_size )
-               bufsize = sample_size;
-
-       uint16_t i = 0;
-       bool startFound = false;
-       bool highFound = false;
-       bool lowFound = false;
-       uint8_t curSample = 0;
-       uint8_t lastSample = 0;
-       uint16_t skipCnt = 0;
-       while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt<1000 && i<bufsize ) {
-               WDT_HIT();
-               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
-                       AT91C_BASE_SSC->SSC_THR = 0x43;
-                       LED_D_ON();
-               }
-               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
-                       curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       LED_D_OFF();
-
-                       // skip until the first high sample above threshold
-                       if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
-                               //if (curSample > lastSample) 
-                               //      lastSample = curSample;
-                               highFound = true;
-                       } else if (!highFound) {
-                               skipCnt++;
-                               continue;
-                       }
-                       // skip until the first Low sample below threshold
-                       if (!startFound && curSample < T55xx_READ_LOWER_THRESHOLD) {
-                               //if (curSample > lastSample) 
-                               lastSample = curSample;
-                               lowFound = true;
-                       } else if (!lowFound) {
-                               skipCnt++;
-                               continue;
-                       }
-
-
-                       // skip until first high samples begin to change
-                       if (startFound || curSample > T55xx_READ_LOWER_THRESHOLD+T55xx_READ_TOL){
-                               // if just found start - recover last sample
-                               if (!startFound) {
-                                       dest[i++] = lastSample;
-                                       startFound = true;
-                               }
-                               // collect samples
-                               dest[i++] = curSample;
-                       }
-               }
-       }
-}
-
-/**
-* 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
 * and is Manchester?,  we directly gather the manchester data into bigbuff
 **/
 #define COTAG_T1 384


@@ -396,8 +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;
        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;
                WDT_HIT();
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;


@@ -410,14 +357,20 @@ uint32_t doCotagAcquisitionManchester() {
 
                        // find first peak
                        if ( !firsthigh ) {
 
                        // find first peak
                        if ( !firsthigh ) {

-                               if (sample < COTAG_ONE_THRESHOLD) 
+                               if (sample < COTAG_ONE_THRESHOLD) {
+                                       noise_counter++;

                                        continue;
                                        continue;

+                               }
+                               noise_counter = 0;

                                firsthigh = 1;
                        }
 
                        if ( !firstlow ){
                                firsthigh = 1;
                        }
 
                        if ( !firstlow ){

-                               if (sample > COTAG_ZERO_THRESHOLD )
+                               if (sample > COTAG_ZERO_THRESHOLD ) {
+                                       noise_counter++;

                                        continue;
                                        continue;

+                               }
+                               noise_counter=0;

                                firstlow = 1;
                        }
 
                                firstlow = 1;
                        }