mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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93 lines
2.7 KiB
C
93 lines
2.7 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 "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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