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0472d76d 1#include "proxmark3.h"
2#include "apps.h"
3#include "BigBuf.h"
4#include "util.h"
5
6static void RAMFUNC optimizedSnoop(void);
7
8static void RAMFUNC optimizedSnoop(void)
9{
10 BigBuf_free();
11 int n = BigBuf_max_traceLen() / sizeof(uint16_t); // take all memory
031311c7 12
0472d76d 13 uint16_t *dest = (uint16_t *)BigBuf_get_addr();
14 uint16_t *destend = dest + n;
15
16 AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16); // Setting Frame mode, 16 bits per word
17 // Reading data loop
18 while(dest <= destend)
19 {
20 if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)
21 {
22 *dest = (uint16_t)(AT91C_BASE_SSC->SSC_RHR);
23 dest = dest + 1;
24 }
25 }
26 //Resetting Frame mode (First set in fpgaloader.c)
031311c7 27 AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
0472d76d 28}
29
30void HfSnoop(int samplesToSkip, int triggersToSkip)
31{
32 Dbprintf("Skipping first %d sample pairs, Skipping %d triggers.\n", samplesToSkip, triggersToSkip);
33 bool trigger_cnt;
031311c7 34 LED_D_ON();
0472d76d 35 // Select correct configs
36 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
37 // Set up the synchronous serial port
38 FpgaSetupSsc();
39 // connect Demodulated Signal to ADC:
40 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
41 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SNOOP);
42 SpinDelay(100);
43
44 AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16); // Setting Frame Mode For better performance on high speed data transfer.
031311c7 45
0472d76d 46 trigger_cnt = 0;
031311c7 47 uint16_t r = 0;
48 while(!BUTTON_PRESS()) {
49 WDT_HIT();
0472d76d 50 if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
51 r = (uint16_t)AT91C_BASE_SSC->SSC_RHR;
031311c7 52 if (!(trigger_cnt == triggersToSkip) && ( (r >> 8) >= 240))
0472d76d 53 {
54 Dbprintf("Trigger kicked! Value: %d.", r >> 8);
55 trigger_cnt++;
56 break;
031311c7 57 }
0472d76d 58 }
59 }
031311c7 60 if(!BUTTON_PRESS()) {
61 Dbprintf("Trigger kicked! Value: %d, Dumping Samples Hispeed now.", r >> 8);
62 int waitcount = samplesToSkip; // lets wait 40000 ticks of pck0
63 while(waitcount != 0) {
64 if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
65 waitcount--;
66 }
0472d76d 67 }
0472d76d 68
031311c7 69 optimizedSnoop();
70 }
0472d76d 71
031311c7 72 DbpString("HF Snoop end");
0472d76d 73 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
74 LED_D_OFF();
75}
76
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