mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 01:55:38 +08:00
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
#include "proxmark3.h"
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#include "apps.h"
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#include "BigBuf.h"
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#include "util.h"
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#include "usb_cdc.h" // for usb_poll_validate_length
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static void RAMFUNC optimizedSnoop(void);
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static void RAMFUNC optimizedSnoop(void)
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{
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int n = BigBuf_max_traceLen() / sizeof(uint16_t); // take all memory
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uint16_t *dest = (uint16_t *)BigBuf_get_addr();
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uint16_t *destend = dest + n-1;
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// Reading data loop
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while(dest <= destend) {
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if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
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*dest = (uint16_t)(AT91C_BASE_SSC->SSC_RHR);
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dest++;
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}
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}
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//setting tracelen - importsnt! it was set by buffer overflow before
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set_tracelen( BigBuf_max_traceLen());
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}
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void HfSnoop(int samplesToSkip, int triggersToSkip)
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{
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BigBuf_free(); BigBuf_Clear();
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Dbprintf("Skipping first %d sample pairs, Skipping %d triggers.\n", samplesToSkip, triggersToSkip);
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int trigger_cnt;
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LED_D_ON();
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// Select correct configs
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FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
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// Set up the synchronous serial port
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FpgaSetupSsc();
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// connect Demodulated Signal to ADC:
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SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SNOOP);
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SpinDelay(100);
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AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16); // Setting Frame Mode For better performance on high speed data transfer.
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trigger_cnt = 0;
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uint16_t r = 0;
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while (!BUTTON_PRESS() && !usb_poll_validate_length() ) {
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WDT_HIT();
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if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
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r = (uint16_t)AT91C_BASE_SSC->SSC_RHR;
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r = MAX(r & 0xff, r >> 8);
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if (r >= 180) {
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if (++trigger_cnt > triggersToSkip)
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break;
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}
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}
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}
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if (!BUTTON_PRESS()) {
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int waitcount = samplesToSkip; // lets wait 40000 ticks of pck0
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while(waitcount != 0) {
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if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY))
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waitcount--;
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}
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optimizedSnoop();
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Dbprintf("Trigger kicked! Value: %d, Dumping Samples Hispeed now.", r);
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}
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//Resetting Frame mode (First set in fpgaloader.c)
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AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
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DbpString("HF Snoop end");
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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LED_D_OFF();
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}
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