FIX: the "make clean" for mfkey/Makefile now deletes the executables.

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 2a763a50fe8bce117a42e248b95de8659a1cbde2..7d55fa3cfae938b11edf054422ff461cd6f74869 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -141,7 +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;


@@ -252,26 +252,26 @@ uint32_t SnoopLF() {
 * 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){
+void doT55x7Acquisition(size_t sample_size) {

 
 

-       #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_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();
        
        #define T55xx_READ_TOL   5
 
        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;
        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 curSample = 0;

-       uint8_t firstSample = 0;
+       uint8_t lastSample = 0;

        uint16_t skipCnt = 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;


@@ -281,26 +281,37 @@ void doT55x7Acquisition(void){
                        curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;   
                        LED_D_OFF();
                
                        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;

                        }
                }
                        }
                }

-               

        }
 }
                        
\ No newline at end of file
        }
 }
                        
\ No newline at end of file