Major rework of hf mf nested:

- PM: used GetCountMifare in MifareNested() for improved timing accuracy and to deliver better quality nonces
- PM: MifareNested now delivers exactly two different nonces to avoid time consuming multiple lfsr_recovery32() on client side
- Client: replaced quicksort by bucketsort in crapto1.c which is faster 
- Client: use multithreading (two parallel calls to lfsr_recovery32())
- Client: fixed a small bug in mfnested() (always showed trgkey=0)
- Client: introduced a mutex for PrintAndLog() to avoid interlaced printing
Minor rework of hf mf chk:
- Avoid time consuming off/on cycles. Send a "halt" instead.

armsrc/util.c

@@ -11,6 +11,7 @@
 #include "proxmark3.h"
 #include "util.h"
 #include "string.h"
+#include "apps.h"
 
 size_t nbytes(size_t nbits) {
 	return (nbits/8)+((nbits%8)>0);
@@ -357,6 +358,14 @@ void StartCountMifare()
 	AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;				// enable TC0
 	AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;				// enable TC1
 	AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN;				// enable TC2
+
+	// activate the ISO14443 part of the FPGA. We need the clock and frame signals.
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+	// synchronize the counter with the ssp_frame signal.
+	while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME); 		// wait for ssp_frame to be low
+	while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME)); 	// sync on rising edge of ssp_frame (= start of transfer)
+
 	AT91C_BASE_TCB->TCB_BCR = 1;							// assert Sync (set all timers to 0 on next active clock edge)
 }