mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-21 04:50:29 -08:00
274 lines
8.0 KiB
C
274 lines
8.0 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// See LICENSE.txt for the text of the license.
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//-----------------------------------------------------------------------------
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// HF general operations
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//-----------------------------------------------------------------------------
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#include "hfops.h"
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#include <string.h>
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#include "appmain.h"
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#include "proxmark3_arm.h"
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#include "cmd.h"
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#include "BigBuf.h"
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#include "fpgaloader.h"
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#include "ticks.h"
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#include "dbprint.h"
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#include "util.h"
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#include "commonutil.h"
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#include "lfsampling.h"
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int HfReadADC(uint32_t samplesCount, bool ledcontrol) {
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if (ledcontrol) LEDsoff();
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BigBuf_Clear_ext(false);
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// connect Demodulated Signal to ADC:
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SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
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FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
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// And put the FPGA in the appropriate mode
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_212_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE);
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// Setup
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FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
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if (ledcontrol) LED_A_ON();
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uint32_t sbs = samplesCount;
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initSampleBuffer(&sbs);
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uint32_t wdtcntr = 0;
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for (;;) {
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if (BUTTON_PRESS()) {
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break;
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}
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if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
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volatile uint16_t sample = AT91C_BASE_SSC->SSC_RHR;
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// FPGA side:
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// corr_i_out <= {2'b00, corr_amplitude[13:8]};
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// corr_q_out <= corr_amplitude[7:0];
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if (sample > 0x1fff)
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sample = 0xff;
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else
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sample = sample >> 5;
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logSample(sample & 0xff, 1, 8, false);
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if (getSampleCounter() >= samplesCount)
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break;
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if (wdtcntr++ > 512) {
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WDT_HIT();
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wdtcntr = 0;
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}
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} else {
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continue;
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}
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}
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FpgaDisableTracing();
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FpgaSetupSsc(FPGA_MAJOR_MODE_OFF);
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// Turn the field off
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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uint32_t scnt = getSampleCounter();
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reply_ng(CMD_HF_ACQ_RAW_ADC, PM3_SUCCESS, (uint8_t *)&scnt, 4);
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if (ledcontrol) LEDsoff();
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return 0;
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}
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uint8_t encode_acc = 0;
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uint8_t encode_acc_bit_count = 0;
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uint32_t encode_indx = 0;
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static void EncodeInit(void) {
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encode_acc = 0;
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encode_acc_bit_count = 0;
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encode_indx = 0;
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}
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static void EncodeAddBit(uint8_t *data, uint8_t bit, uint8_t bit_count) {
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for (int i = 0; i < bit_count; i++) {
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encode_acc = (encode_acc << 1) | (bit & 0x01);
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encode_acc_bit_count++;
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if (encode_acc_bit_count > 7) {
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data[encode_indx++] = encode_acc;
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encode_acc = 0;
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encode_acc_bit_count = 0;
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}
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}
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}
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static uint32_t EncodeFinish(uint8_t *data) {
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if (encode_acc_bit_count > 0) {
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encode_acc = encode_acc << (8 - encode_acc_bit_count);
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data[encode_indx++] = encode_acc;
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}
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return encode_indx;
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}
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static uint32_t HfEncodeTkm(const uint8_t *uid, uint8_t modulation, uint8_t *data) {
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uint32_t len = 0;
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if (modulation == 0) {
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// TK-13
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// 74ns 1 field cycle,
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// carrier frequency is fc/64 (212kHz), 4.7 mks
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// 100 field cycle = impulse 1.6 ( 1 bit from real tag)
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// 1000 field cycle = `1` 15.6 (17 bit from real tag)
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// 500 field cycle = `0` 7.8 ( 7 bit from real tag)
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EncodeInit();
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for (int i = 0; i < 8; i++) {
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for (int j = 0; j < 8; j++) {
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if (((uid[i] << j) & 0x80) != 0) {
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// `1`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 17);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 7);
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} else {
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// `0`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 7);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 17);
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}
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}
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}
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len = EncodeFinish(data);
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} else {
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// TK-17
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// 74ns 1 field cycle,
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// carrier frequency is fc/64 (212kHz), 4.7 mks
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// 0 --- 8 --- 12-15 --- 18-19 --- 26-28 --- 32
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// DO NOT NORMALIZE!!!! it must be with some error like this!!!!
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// `00` -- 1-25-1-5
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// `01` -- 1-12-1-18
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// `10` -- 1-17-1-13
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// `11` -- 1-7-1-23
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EncodeInit();
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for (int i = 0; i < 8; i++) {
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for (int j = 0; j < 8; j += 2) {
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uint8_t twobit = ((uid[i] >> j) & 0x03);
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if (twobit == 0x00) {
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// `00`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 25);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 5);
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} else if (twobit == 0x01) {
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// `01`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 12);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 18);
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} else if (twobit == 0x02) {
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// `10`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 17);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 13);
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} else { // twobit == 0x03
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// `11`
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 7);
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EncodeAddBit(data, 1, 1);
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EncodeAddBit(data, 0, 23);
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}
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}
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}
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EncodeAddBit(data, 1, 1);
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len = EncodeFinish(data);
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}
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return len;
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}
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int HfSimulateTkm(const uint8_t *uid, uint8_t modulation, uint32_t timeout) {
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// free eventually allocated BigBuf memory
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BigBuf_free_keep_EM();
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LEDsoff();
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uint8_t *data = BigBuf_calloc(256);
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uint32_t elen = HfEncodeTkm(uid, modulation, data);
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if (elen == 0) {
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DbpString("encode error");
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reply_ng(CMD_HF_TEXKOM_SIMULATE, PM3_EAPDU_ENCODEFAIL, NULL, 0);
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return PM3_EAPDU_ENCODEFAIL;
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}
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LED_C_ON();
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FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
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SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_212K);
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FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
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bool button_pressed = false;
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bool exit_loop = false;
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bool field_on = false;
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uint32_t startTime = GetTickCount();
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while (exit_loop == false) {
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button_pressed = BUTTON_PRESS();
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if (button_pressed || data_available()) {
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break;
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}
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WDT_HIT();
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if (timeout > 0 && startTime + timeout < GetTickCount())
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break;
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// in mV
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int vHf = (MAX_ADC_HF_VOLTAGE * SumAdc(ADC_CHAN_HF, 32)) >> 15;
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if (vHf > MF_MINFIELDV) {
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if (field_on == false) {
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LED_A_ON();
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SpinDelay(50);
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}
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field_on = true;
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} else {
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if (field_on) {
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LED_A_OFF();
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}
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field_on = false;
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continue;
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}
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SpinDelay(3);
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for (int i = 0; i < elen;) {
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if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
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AT91C_BASE_SSC->SSC_THR = data[i++];
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}
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}
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}
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switch_off();
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if (button_pressed)
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DbpString("Exit by press button");
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reply_ng(CMD_HF_TEXKOM_SIMULATE, PM3_SUCCESS, NULL, 0);
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return PM3_SUCCESS;
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}
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