FIX: the read counter in "hf 14a sim" (for ntag/ev) should work better now. Instea...

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 83579ccab4f62b452f58e02e2e4fd19eaa45d298..8931f41d1b51385dd8375600fe6d3fec38487bd0 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;


@@ -252,53 +252,67 @@ 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_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
        #define T55xx_READ_TOL   5

-       #define T55xx_LOWER_THRESHOLD 128-40  //-50

 
        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;

 
        uint16_t i = 0;
        bool startFound = false;
        bool highFound = false;
 
        uint16_t i = 0;
        bool startFound = false;
        bool highFound = false;

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

                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 = 0x00;
+                       AT91C_BASE_SSC->SSC_THR = 0x43;

                        LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {

-                       sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+                       curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;   

                        LED_D_OFF();
                
                        LED_D_OFF();
                

-                       // find first high sample
-                       if (!startFound && sample > T55xx_UPPER_THRESHOLD) {
-                               if (sample > firstSample) 
-                                       firstSample = sample;
-                               highFound = TRUE;
+                       // 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) {
                        } else if (!highFound) {

+                               skipCnt++;

                                continue;
                        }
                                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 || sample < firstSample - T55xx_READ_TOL){
-                               if (!startFound) 
-                                       dest[i++] = firstSample;
-                               startFound = TRUE;
-                               dest[i++] = sample;
-                       
-                       // exit condition.
-                       if (i >= bufsize) break;
+                       // 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;
+                               if (i >= bufsize-1) break;

                        }
                }
        }
                        }
                }
        }

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