CHG: some desfire changes from @bforbort fork. *untested*

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 339434215512a7e9536dc9d19a371b14857a7dde..2a763a50fe8bce117a42e248b95de8659a1cbde2 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -121,11 +121,11 @@ void LFSetupFPGAForADC(int divisor, bool lf_field)
  */
 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();
-    int bufsize = BigBuf_max_traceLen();
+    uint16_t bufsize = BigBuf_max_traceLen();
 
-       memset(dest, 0, bufsize);
+       BigBuf_Clear_ext(false);
 
        if(bits_per_sample < 1) bits_per_sample = 1;
        if(bits_per_sample > 8) bits_per_sample = 8;
@@ -244,7 +244,6 @@ uint32_t SampleLF(bool printCfg)
 * Initializes the FPGA for snoop-mode (field off), and acquires the samples.
 * @return number of bits sampled
 **/
-
 uint32_t SnoopLF() {
        return ReadLF(false, true);
 }
@@ -258,7 +257,6 @@ 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
-       //#define T55xx_READ_LOWER_THRESHOLD 128-40  //-50
 
        uint8_t *dest = BigBuf_get_addr();
        uint16_t bufsize = BigBuf_max_traceLen();
@@ -266,27 +264,30 @@ void doT55x7Acquisition(void){
        if ( bufsize > T55xx_SAMPLES_SIZE )
                bufsize = T55xx_SAMPLES_SIZE;
 
-       memset(dest, 0, bufsize);
-               
+       //int adcval = 0;
        uint16_t i = 0;
        bool startFound = false;
        bool highFound = false;
        uint8_t curSample = 0;
        uint8_t firstSample = 0;
-       for(;;) {
+       uint16_t skipCnt = 0;
+       while(!BUTTON_PRESS() && skipCnt<1000) {
+               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;
-                       
+                       curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;   
+                       LED_D_OFF();
+               
                        // find first high sample
                        if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
                                if (curSample > firstSample) 
                                        firstSample = curSample;
                                highFound = true;
                        } else if (!highFound) {
+                               skipCnt++;
                                continue;
                        }
 
@@ -296,9 +297,10 @@ void doT55x7Acquisition(void){
                                        dest[i++] = firstSample;
                                startFound = true;
                                dest[i++] = curSample;
-                       LED_D_OFF();
-                       if (i >= bufsize) break;
+                               if (i >= bufsize-1) break;
                        }
                }
+               
        }
-}
\ No newline at end of file
+}
+                       
\ No newline at end of file