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104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
#ifndef __LFSAMPLING_H
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#define __LFSAMPLING_H
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#include "common.h"
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#include "pm3_cmd.h"
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typedef struct {
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uint8_t *buffer;
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uint32_t numbits;
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uint32_t position;
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} BitstreamOut;
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typedef struct {
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int dec_counter;
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uint32_t sum;
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uint32_t counter;
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uint32_t total_saved;
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} sampling_t;
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/**
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* acquisition of Cotag LF signal. Similar to other LF, since the Cotag has such long datarate RF/384
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* and is Manchester?, we directly gather the manchester data into bigbuff
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**/
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void doCotagAcquisition(size_t sample_size);
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uint32_t doCotagAcquisitionManchester(void);
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/**
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* acquisition of T55x7 LF signal. Similar to other LF, but adjusted with @marshmellows thresholds
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* the data is collected in BigBuf.
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**/
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void doT55x7Acquisition(size_t sample_size);
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/**
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* Initializes the FPGA for reader-mode (field on), and acquires the samples.
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* @return number of bits sampled
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**/
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uint32_t SampleLF(bool verbose, uint32_t sample_size);
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/**
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* Initializes the FPGA for sniff-mode (field off), and acquires the samples.
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* @return number of bits sampled
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**/
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uint32_t SniffLF(void);
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uint32_t DoAcquisition(uint8_t decimation, uint8_t bits_per_sample, bool avg, int16_t trigger_threshold,
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bool verbose, uint32_t sample_size, uint32_t cancel_after, int32_t samples_to_skip);
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// adds sample size to default options
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uint32_t DoPartialAcquisition(int trigger_threshold, bool verbose, uint32_t sample_size, uint32_t cancel_after);
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/**
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* @brief Does sample acquisition, ignoring the config values set in the sample_config.
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* This method is typically used by tag-specific readers who just wants to read the samples
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* the normal way
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* @param trigger_threshold
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* @param verbose
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* @return number of bits sampled
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*/
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uint32_t DoAcquisition_default(int trigger_threshold, bool verbose);
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/**
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* @brief Does sample acquisition, using the config values set in the sample_config.
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* @param trigger_threshold
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* @param verbose
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* @return number of bits sampled
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*/
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uint32_t DoAcquisition_config(bool verbose, uint32_t sample_size);
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/**
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* Refactoring of lf sampling buffer
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*/
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void initSampleBuffer(uint32_t *sample_size);
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void initSampleBufferEx(uint32_t *sample_size, bool use_malloc);
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void logSampleSimple(uint8_t sample);
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void logSample(uint8_t sample, uint8_t decimation, uint8_t bits_per_sample, bool avg);
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uint32_t getSampleCounter(void);
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/**
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* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
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* if not already loaded, sets divisor and starts up the antenna.
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* @param divisor : 1, 88> 255 or negative ==> 134.8 kHz
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* 0 or 95 ==> 125 kHz
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*
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**/
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void LFSetupFPGAForADC(int divisor, bool reader_field);
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/**
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* Called from the USB-handler to set the sampling configuration
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* The sampling config is used for std reading and sniffing.
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*
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* Other functions may read samples and ignore the sampling config,
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* such as functions to read the UID from a prox tag or similar.
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*
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* Values set to '0' implies no change (except for averaging)
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* @brief setSamplingConfig
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* @param sc
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*/
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void setSamplingConfig(sample_config *sc);
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sample_config *getSamplingConfig(void);
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void printConfig(void);
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#endif // __LFSAMPLING_H
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