Add @Iceman1001 s cotag read

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 7c5412820b20ce065637c6af6d253345dba4ba5c..72aabe00fda46318b1959d93c5150e626a1a8d9a 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -10,8 +10,9 @@
 #include "apps.h"
 #include "util.h"
 #include "string.h"
 #include "apps.h"
 #include "util.h"
 #include "string.h"

-

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

+#include "usb_cdc.h"   // for usb_poll_validate_length
+//#include "ticks.h"           // for StartTicks

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


@@ -124,7 +125,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
        uint8_t *dest = BigBuf_get_addr();
     int bufsize = BigBuf_max_traceLen();
 
        uint8_t *dest = BigBuf_get_addr();
     int bufsize = BigBuf_max_traceLen();
 

-       memset(dest, 0, bufsize);
+       //memset(dest, 0, bufsize); //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;


@@ -140,7 +141,7 @@ 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;


@@ -237,7 +238,9 @@ uint32_t ReadLF(bool activeField, bool silent)
 **/
 uint32_t SampleLF(bool printCfg)
 {
 **/
 uint32_t SampleLF(bool printCfg)
 {

-       return ReadLF(true, printCfg);
+       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.
 }
 /**
 * Initializes the FPGA for snoop-mode (field off), and acquires the samples.


@@ -246,7 +249,9 @@ uint32_t SampleLF(bool printCfg)
 
 uint32_t SnoopLF()
 {
 
 uint32_t SnoopLF()
 {

-       return ReadLF(false, true);
+       uint32_t ret = ReadLF(false, true);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       return ret;

 }
 
 /**
 }
 
 /**


@@ -255,7 +260,8 @@ uint32_t SnoopLF()
 **/
 void doT55x7Acquisition(size_t sample_size) {
 
 **/
 void doT55x7Acquisition(size_t sample_size) {
 

-       #define T55xx_READ_UPPER_THRESHOLD 128+40  // 40 grph
+       #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();
        #define T55xx_READ_TOL   5
 
        uint8_t *dest = BigBuf_get_addr();


@@ -267,10 +273,11 @@ void doT55x7Acquisition(size_t sample_size) {
        uint16_t i = 0;
        bool startFound = false;
        bool highFound = false;
        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;
        uint8_t curSample = 0;
        uint8_t lastSample = 0;
        uint16_t skipCnt = 0;

-       while(!BUTTON_PRESS() && skipCnt<1000) {
+       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;
                WDT_HIT();
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;


@@ -282,15 +289,26 @@ void doT55x7Acquisition(size_t sample_size) {
 
                        // skip until the first high sample above threshold
                        if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
 
                        // skip until the first high sample above threshold
                        if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {

-                               if (curSample > lastSample) 
-                                       lastSample = 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 first high samples begin to change
                        // skip until first high samples begin to change

-                       if (startFound || curSample < T55xx_READ_UPPER_THRESHOLD-T55xx_READ_TOL){
+                       if (startFound || curSample > T55xx_READ_LOWER_THRESHOLD+T55xx_READ_TOL){

                                // if just found start - recover last sample
                                if (!startFound) {
                                        dest[i++] = lastSample;
                                // if just found start - recover last sample
                                if (!startFound) {
                                        dest[i++] = lastSample;


@@ -298,8 +316,129 @@ void doT55x7Acquisition(size_t sample_size) {
                                }
                                // collect samples
                                dest[i++] = curSample;
                                }
                                // collect samples
                                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
+#ifndef COTAG_BITS
+#define COTAG_BITS 264
+#endif
+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];
+               }
+       }
+}
+
+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;
+}