CHG: `lf em` - some minor refactoring in 4x50 commands

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 2a763a50fe8bce117a42e248b95de8659a1cbde2..def7431ded510908bb3572da80fe486586031d65 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -6,26 +6,27 @@
 // Miscellaneous routines for low frequency sampling.
 //-----------------------------------------------------------------------------
 
 // Miscellaneous routines for low frequency sampling.
 //-----------------------------------------------------------------------------
 

-#include "proxmark3.h"
-#include "apps.h"
-#include "util.h"
-#include "string.h"
-

 #include "lfsampling.h"
 
 #include "lfsampling.h"
 

+/*
+Default LF config is set to:
+       decimation = 1  (we keep 1 out of 1 samples)
+       bits_per_sample = 8
+       averaging = YES
+       divisor = 95 (125khz)
+       trigger_threshold = 0
+       */

 sample_config config = { 1, 8, 1, 95, 0 } ;
 
 sample_config config = { 1, 8, 1, 95, 0 } ;
 

-void printConfig()
-{
+void printConfig() {

        Dbprintf("LF Sampling config: ");
        Dbprintf("LF Sampling config: ");

-       Dbprintf("  [q] divisor:           %d ", config.divisor);
+       Dbprintf("  [q] divisor:           %d (%d KHz)", config.divisor, 12000 / (config.divisor+1));

        Dbprintf("  [b] bps:               %d ", config.bits_per_sample);
        Dbprintf("  [d] decimation:        %d ", config.decimation);
        Dbprintf("  [b] bps:               %d ", config.bits_per_sample);
        Dbprintf("  [d] decimation:        %d ", config.decimation);

-       Dbprintf("  [a] averaging:         %d ", config.averaging);
+       Dbprintf("  [a] averaging:         %s ", (config.averaging) ? "Yes" : "No");

        Dbprintf("  [t] trigger threshold: %d ", config.trigger_threshold);
 }
 
        Dbprintf("  [t] trigger threshold: %d ", config.trigger_threshold);
 }
 

-

 /**
  * Called from the USB-handler to set the sampling configuration
  * The sampling config is used for std reading and snooping.
 /**
  * Called from the USB-handler to set the sampling configuration
  * The sampling config is used for std reading and snooping.


@@ -37,38 +38,34 @@ void printConfig()
  * @brief setSamplingConfig
  * @param sc
  */
  * @brief setSamplingConfig
  * @param sc
  */

-void setSamplingConfig(sample_config *sc)
-{
+void setSamplingConfig(sample_config *sc) {

        if(sc->divisor != 0) config.divisor = sc->divisor;
        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;
-
-       config.averaging= sc->averaging;
+       if(sc->bits_per_sample != 0) config.bits_per_sample = sc->bits_per_sample;
+       if(sc->trigger_threshold != -1) config.trigger_threshold = sc->trigger_threshold;
+       
+       config.decimation = (sc->decimation != 0) ? sc->decimation : 1;
+       config.averaging = sc->averaging;

        if(config.bits_per_sample > 8)  config.bits_per_sample = 8;
        if(config.bits_per_sample > 8)  config.bits_per_sample = 8;

-       if(config.decimation < 1)       config.decimation = 1;

 
        printConfig();
 }
 
 
        printConfig();
 }
 

-sample_config* getSamplingConfig()
-{
+sample_config* getSamplingConfig() {

        return &config;
 }
 
        return &config;
 }
 

-typedef struct {
+struct BitstreamOut {

        uint8_t * buffer;
        uint32_t numbits;
        uint32_t position;
        uint8_t * buffer;
        uint32_t numbits;
        uint32_t position;

-} BitstreamOut;
+};

 
 /**
  * @brief Pushes bit onto the stream
  * @param stream
  * @param bit
  */
 
 /**
  * @brief Pushes bit onto the stream
  * @param stream
  * @param bit
  */

-void pushBit( BitstreamOut* stream, uint8_t bit)
-{
+void pushBit( BitstreamOut* stream, uint8_t bit) {

        int bytepos = stream->position >> 3; // divide by 8
        int bitpos = stream->position & 7;
        *(stream->buffer+bytepos) |= (bit > 0) <<  (7 - bitpos);
        int bytepos = stream->position >> 3; // divide by 8
        int bitpos = stream->position & 7;
        *(stream->buffer+bytepos) |= (bit > 0) <<  (7 - bitpos);


@@ -83,8 +80,7 @@ void pushBit( BitstreamOut* stream, uint8_t bit)
 *                                 0 or 95 ==> 125 KHz
 *
 **/
 *                                 0 or 95 ==> 125 KHz
 *
 **/

-void LFSetupFPGAForADC(int divisor, bool lf_field)
-{
+void LFSetupFPGAForADC(int divisor, bool lf_field) {

        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz


@@ -97,13 +93,14 @@ void LFSetupFPGAForADC(int divisor, bool lf_field)
 
        // Connect the A/D to the peak-detected low-frequency path.
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
        // Connect the A/D to the peak-detected low-frequency path.
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);

-       // Give it a bit of time for the resonant antenna to settle.
+       // 50ms 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();
        SpinDelay(50);
        // Now set up the SSC to get the ADC samples that are now streaming at us.
        FpgaSetupSsc();

+       // start a 1.5ticks is 1us
+       StartTicks();

 }
 
 }
 

-

 /**
  * Does the sample acquisition. If threshold is specified, the actual sampling
  * is not commenced until the threshold has been reached.
 /**
  * Does the sample acquisition. If threshold is specified, the actual sampling
  * is not commenced until the threshold has been reached.


@@ -119,13 +116,12 @@ 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.
  */
  * @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) {

        //bigbuf, to hold the aquired raw data signal
        uint8_t *dest = BigBuf_get_addr();
     uint16_t bufsize = BigBuf_max_traceLen();
 
        //bigbuf, to hold the aquired raw data signal
        uint8_t *dest = BigBuf_get_addr();
     uint16_t bufsize = BigBuf_max_traceLen();
 

-       BigBuf_Clear_ext(false);
+       //BigBuf_Clear_ext(false);        //creates issues with cmdread (marshmellow)

 
        if(bits_per_sample < 1) bits_per_sample = 1;
        if(bits_per_sample > 8) bits_per_sample = 8;
 
        if(bits_per_sample < 1) bits_per_sample = 1;
        if(bits_per_sample > 8) bits_per_sample = 8;


@@ -141,7 +137,7 @@ 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 sample_total_numbers =0 ;
        uint32_t sample_total_saved =0 ;
 

-       while(!BUTTON_PRESS()) {
+       while(!BUTTON_PRESS() && !usb_poll_validate_length() ) {

                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;


@@ -211,12 +207,10 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
  * @param silent
  * @return number of bits sampled
  */
  * @param silent
  * @return number of bits sampled
  */

-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);
 }
        return DoAcquisition(1,8,0,trigger_threshold,silent);
 }

-uint32_t DoAcquisition_config( bool silent)
-{
+uint32_t DoAcquisition_config( bool silent) {

        return DoAcquisition(config.decimation
                                  ,config.bits_per_sample
                                  ,config.averaging
        return DoAcquisition(config.decimation
                                  ,config.bits_per_sample
                                  ,config.averaging


@@ -224,11 +218,10 @@ uint32_t DoAcquisition_config( bool silent)
                                  ,silent);
 }
 
                                  ,silent);
 }
 

-uint32_t ReadLF(bool activeField, bool silent)
-{
-       if (!silent) printConfig();
+uint32_t ReadLF(bool activeField, bool silent) {
+       if (!silent)
+               printConfig();

        LFSetupFPGAForADC(config.divisor, activeField);
        LFSetupFPGAForADC(config.divisor, activeField);

-       // Now call the acquisition routine

        return DoAcquisition_config(silent);
 }
 
        return DoAcquisition_config(silent);
 }
 


@@ -236,71 +229,203 @@ uint32_t ReadLF(bool activeField, bool silent)
 * 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)
-{
-       return ReadLF(true, printCfg);
+uint32_t SampleLF(bool printCfg) {
+       BigBuf_Clear_ext(false);
+       uint32_t ret = ReadLF(true, printCfg);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       return ret;     

 }
 /**
 * Initializes the FPGA for snoop-mode (field off), and acquires the samples.
 * @return number of bits sampled
 **/
 uint32_t SnoopLF() {
 }
 /**
 * Initializes the FPGA for snoop-mode (field off), and acquires the samples.
 * @return number of bits sampled
 **/
 uint32_t SnoopLF() {

-       return ReadLF(false, true);
+       BigBuf_Clear_ext(false);
+       uint32_t ret = ReadLF(false, true);
+       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.
 **/
 }
 
 /**
 * acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
 * the data is collected in BigBuf.
 **/

-void doT55x7Acquisition(void){
-
-       #define T55xx_SAMPLES_SIZE 12000 // 32 x 32 x 10  (32 bit times numofblock (7), times clock skip..)
-       #define T55xx_READ_UPPER_THRESHOLD 128+40  // 50
-       #define T55xx_READ_TOL   5
+void doT55x7Acquisition(size_t sample_size) {

 
 

+       #define T55xx_READ_UPPER_THRESHOLD 128+40  // 60 grph
+       #define T55xx_READ_LOWER_THRESHOLD 128-40  // -60 grph
+       #define T55xx_READ_TOL   2
+       

        uint8_t *dest = BigBuf_get_addr();
        uint16_t bufsize = BigBuf_max_traceLen();
        
        uint8_t *dest = BigBuf_get_addr();
        uint16_t bufsize = BigBuf_max_traceLen();
        

-       if ( bufsize > T55xx_SAMPLES_SIZE )
-               bufsize = T55xx_SAMPLES_SIZE;
+       if ( bufsize > sample_size )
+               bufsize = sample_size;

 
 

-       //int adcval = 0;
-       uint16_t i = 0;
+       uint8_t curSample = 0, lastSample = 0;
+       uint16_t i = 0, skipCnt = 0;

        bool startFound = false;
        bool highFound = false;
        bool startFound = false;
        bool highFound = false;

-       uint8_t curSample = 0;
-       uint8_t firstSample = 0;
-       uint16_t skipCnt = 0;
-       while(!BUTTON_PRESS() && skipCnt<1000) {
+       bool lowFound = false;
+               
+       while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt < 1000 && (i < bufsize) ) {

                WDT_HIT();              
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                WDT_HIT();              
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {

-                       AT91C_BASE_SSC->SSC_THR = 0x43;
+                       AT91C_BASE_SSC->SSC_THR = 0x43; //43

                        LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;   
                        LED_D_OFF();
                
                        LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;   
                        LED_D_OFF();
                

-                       // find first high sample
+                       // skip until the first high sample above threshold

                        if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
                        if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {

-                               if (curSample > firstSample) 
-                                       firstSample = curSample;
+                               //if (curSample > lastSample) 
+                               //      lastSample = curSample;

                                highFound = true;
                        } else if (!highFound) {
                                skipCnt++;
                                continue;
                        }
                                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 samples begin to change
-                       if (startFound || curSample < firstSample-T55xx_READ_TOL){
-                               if (!startFound) 
-                                       dest[i++] = firstSample;
-                               startFound = true;
+                       // 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;
                                dest[i++] = curSample;

-                               if (i >= bufsize-1) break;

                        }
                }
                        }
                }

+       }
+}
+/**
+* acquisition of Cotag LF signal. Similart 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
+#define COTAG_T2 (COTAG_T1>>1)
+#define COTAG_ONE_THRESHOLD 128+30
+#define COTAG_ZERO_THRESHOLD 128-30
+void doCotagAcquisition(size_t sample_size) {
+
+       uint8_t *dest = BigBuf_get_addr();
+       uint16_t bufsize = BigBuf_max_traceLen();
+       
+       if ( bufsize > sample_size )
+               bufsize = sample_size;
+
+       dest[0] = 0;    
+       uint8_t sample = 0, firsthigh = 0, firstlow = 0; 
+       uint16_t i = 0;
+
+       while (!BUTTON_PRESS() && !usb_poll_validate_length() && (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) {
+                       sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;      
+                       LED_D_OFF();
+               
+                       // find first peak
+                       if ( !firsthigh ) {
+                               if (sample < COTAG_ONE_THRESHOLD) 
+                                       continue;
+                               firsthigh = 1;
+                       }
+                       if ( !firstlow ){
+                               if (sample > COTAG_ZERO_THRESHOLD )
+                                       continue;
+                               firstlow = 1;
+                       }
+
+                       ++i;                    
+       
+                       if ( sample > COTAG_ONE_THRESHOLD)
+                               dest[i] = 255;
+                       else if ( sample < COTAG_ZERO_THRESHOLD) 
+                               dest[i] = 0;
+                       else 
+                               dest[i] = dest[i-1];                    
+               }

        }
 }
        }
 }

-                       
\ No newline at end of file
+
+uint32_t doCotagAcquisitionManchester() {
+
+       uint8_t *dest = BigBuf_get_addr();
+       uint16_t bufsize = BigBuf_max_traceLen();
+       
+       if ( bufsize > COTAG_BITS )
+               bufsize = COTAG_BITS;
+
+       dest[0] = 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) ) {
+               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) {
+                       sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;      
+                       LED_D_OFF();
+               
+                       // find first peak
+                       if ( !firsthigh ) {
+                               if (sample < COTAG_ONE_THRESHOLD) 
+                                       continue;
+                               firsthigh = 1;
+                       }
+                       
+                       if ( !firstlow ){
+                               if (sample > COTAG_ZERO_THRESHOLD )
+                                       continue;
+                               firstlow = 1;
+                       }
+                                               
+                       // set sample 255, 0,  or previous                      
+                       if ( sample > COTAG_ONE_THRESHOLD){
+                               prev = curr;
+                               curr = 1;
+                       }
+                       else if ( sample < COTAG_ZERO_THRESHOLD) {
+                               prev = curr;
+                               curr = 0;
+                       }
+                       else {
+                               curr = prev;
+                       }                       
+
+                       // full T1 periods, 
+                       if ( period > 0 ) {
+                               --period;
+                               continue;
+                       }
+                                               
+                       dest[sample_counter] = curr;
+                       ++sample_counter;
+                       period = COTAG_T1;
+               }
+       }
+       return sample_counter;
+}
\ No newline at end of file