proxmark3/armsrc/lfsampling.h

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#ifndef __LFSAMPLING_H
#define __LFSAMPLING_H
#include "common.h"
#include "pm3_cmd.h"
typedef struct {
uint8_t *buffer;
uint32_t numbits;
uint32_t position;
} BitstreamOut;
typedef struct {
int dec_counter;
uint32_t sum;
uint32_t counter;
uint32_t total_saved;
} sampling_t;
/**
* acquisition of Cotag LF signal. Similar to other LF, since the Cotag has such long datarate RF/384
* and is Manchester?, we directly gather the manchester data into bigbuff
**/
void doCotagAcquisition(void);
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uint16_t doCotagAcquisitionManchester(uint8_t *dest, uint16_t destlen);
/**
* acquisition of T55x7 LF signal. Similar to other LF, but adjusted with @marshmellows thresholds
* the data is collected in BigBuf.
**/
void doT55x7Acquisition(size_t sample_size);
/**
* Initializes the FPGA for reader-mode (field on), and acquires the samples.
* @return number of bits sampled
**/
uint32_t SampleLF(bool verbose, uint32_t sample_size);
/**
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* Initializes the FPGA for sniff-mode (field off), and acquires the samples.
* @return number of bits sampled
**/
uint32_t SniffLF(bool verbose, uint32_t sample_size);
uint32_t DoAcquisition(uint8_t decimation, uint8_t bits_per_sample, bool avg, int16_t trigger_threshold,
bool verbose, uint32_t sample_size, uint32_t cancel_after, int32_t samples_to_skip);
// adds sample size to default options
uint32_t DoPartialAcquisition(int trigger_threshold, bool verbose, uint32_t sample_size, uint32_t cancel_after);
/**
* @brief Does sample acquisition, ignoring the config values set in the sample_config.
* This method is typically used by tag-specific readers who just wants to read the samples
* the normal way
* @param trigger_threshold
* @param verbose
* @return number of bits sampled
*/
uint32_t DoAcquisition_default(int trigger_threshold, bool verbose);
/**
* @brief Does sample acquisition, using the config values set in the sample_config.
* @param trigger_threshold
* @param verbose
* @return number of bits sampled
*/
uint32_t DoAcquisition_config(bool verbose, uint32_t sample_size);
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/**
* Refactoring of lf sampling buffer
*/
void initSampleBuffer(uint32_t *sample_size);
void initSampleBufferEx(uint32_t *sample_size, bool use_malloc);
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void logSampleSimple(uint8_t sample);
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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/**
* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
* 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
* 0 or 95 ==> 125 kHz
*
**/
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void LFSetupFPGAForADC(int divisor, bool reader_field);
/**
* Called from the USB-handler to set the sampling configuration
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* The sampling config is used for std reading and sniffing.
*
* Other functions may read samples and ignore the sampling config,
* such as functions to read the UID from a prox tag or similar.
*
* Values set to '0' implies no change (except for averaging)
* @brief setSamplingConfig
* @param sc
*/
void setSamplingConfig(sample_config *sc);
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sample_config *getSamplingConfig(void);
void printLFConfig(void);
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void printSamples(void);
#endif // __LFSAMPLING_H