#-DWITH_LCD
#SRC_LCD = fonts.c LCD.c
-SRC_LF = lfops.c hitag2.c
+SRC_LF = lfops.c hitag2.c lfsampling.c
SRC_ISO15693 = iso15693.c iso15693tools.c
SRC_ISO14443a = epa.c iso14443a.c mifareutil.c mifarecmd.c mifaresniff.c
SRC_ISO14443b = iso14443.c
#include "legicrf.h"
#include <hitag2.h>
-
+#include "lfsampling.h"
#ifdef WITH_LCD
#include "LCD.h"
#endif
switch(c->cmd) {
#ifdef WITH_LF
+ case CMD_SET_LF_SAMPLING_CONFIG:
+ setSamplingConfig((sample_config *) c->d.asBytes);
+ break;
case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
- AcquireRawAdcSamples125k(c->arg[0], c->arg[1], c->arg[2]);
- cmd_send(CMD_ACK,0,0,0,0,0);
+ cmd_send(CMD_ACK,SampleLF(),0,0,0,0);
break;
case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
ModThenAcquireRawAdcSamples125k(c->arg[0],c->arg[1],c->arg[2],c->d.asBytes);
break;
case CMD_LF_SNOOP_RAW_ADC_SAMPLES:
- SnoopLFRawAdcSamples(c->arg[0], c->arg[1]);
- cmd_send(CMD_ACK,0,0,0,0,0);
+ cmd_send(CMD_ACK,SnoopLF(),0,0,0,0);
break;
case CMD_HID_DEMOD_FSK:
CmdHIDdemodFSK(c->arg[0], 0, 0, 1);
cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,0,((byte_t*)BigBuf)+c->arg[0]+i,len);
}
// Trigger a finish downloading signal with an ACK frame
- cmd_send(CMD_ACK,bits_per_sample,decimation,0,0,0);
+ // We put a 1 in arg[0] to alert the host we're also sending sample_config
+ cmd_send(CMD_ACK,1,0,0,getSamplingConfig(),sizeof(sample_config));
LED_B_OFF();
break;
void ToSendStuffBit(int b);
void ToSendReset(void);
void ListenReaderField(int limit);
-void SnoopLFRawAdcSamples(int divisor, int trigger_threshold);
-void DoAcquisition125k(int trigger_threshold);
extern int ToSendMax;
extern uint8_t ToSend[];
extern uint32_t BigBuf[];
extern uint8_t bits_per_sample ;
extern bool averaging;
-void AcquireRawAdcSamples125k(int divisor,int arg1, int arg2);
+void AcquireRawAdcSamples125k(int divisor);
void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,uint8_t *command);
void ReadTItag(void);
void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc);
#include "crc16.h"
#include "string.h"
#include "lfdemod.h"
+#include "lfsampling.h"
-uint8_t decimation = 1;
-uint8_t bits_per_sample = 8;
-bool averaging = 1;
-
-
-typedef struct {
- uint8_t * buffer;
- uint32_t numbits;
- uint32_t position;
-} BitstreamOut;
-/**
- * @brief Pushes bit onto the stream
- * @param stream
- * @param bit
- */
-void pushBit( BitstreamOut* stream, uint8_t bit)
-{
- int bytepos = stream->position >> 3; // divide by 8
- int bitpos = stream->position & 7;
- *(stream->buffer+bytepos) |= (bit > 0) << (7 - bitpos);
- stream->position++;
- stream->numbits++;
-}
/**
- * Does the sample acquisition. If threshold is specified, the actual sampling
- * is not commenced until the threshold has been reached.
- * This method implements decimation and quantization in order to
- * be able to provide longer sample traces.
- * Uses the following global settings:
- * - decimation - how much should the signal be decimated. A decimation of N means we keep 1 in N samples, etc.
- * - bits_per_sample - bits per sample. Max 8, min 1 bit per sample.
- * - averaging If set to true, decimation will use averaging, so that if e.g. decimation is 3, the sample
- * value that will be used is the average value of the three samples.
- *
- * @param trigger_threshold - a threshold. The sampling won't commence until this threshold has been reached. Set
- * to -1 to ignore threshold.
- * @param silent - is true, now outputs are made. If false, dbprints the status
- * @return the number of bits occupied by the samples.
+ * Function to do a modulation and then get samples.
+ * @param delay_off
+ * @param period_0
+ * @param period_1
+ * @param command
*/
-uint32_t DoAcquisition125k_internal(int trigger_threshold,bool silent)
-{
- //.
- uint8_t *dest = (uint8_t *)BigBuf;
- int bufsize = BIGBUF_SIZE;
- memset(dest, 0, bufsize);
-
- if(bits_per_sample < 1) bits_per_sample = 1;
- if(bits_per_sample > 8) bits_per_sample = 8;
-
- if(decimation < 1) decimation = 1;
-
- // Use a bit stream to handle the output
- BitstreamOut data = { dest , 0, 0};
- int sample_counter = 0;
- uint8_t sample = 0;
- //If we want to do averaging
- uint32_t sample_sum =0 ;
- uint32_t sample_total_numbers =0 ;
- uint32_t sample_total_saved =0 ;
-
- while(!BUTTON_PRESS()) {
- WDT_HIT();
- if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
- AT91C_BASE_SSC->SSC_THR = 0x43;
- LED_D_ON();
- }
- if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
- sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
- LED_D_OFF();
- if (trigger_threshold != -1 && sample < trigger_threshold)
- continue;
-
- trigger_threshold = -1;
- sample_total_numbers++;
-
- if(averaging)
- {
- sample_sum += sample;
- }
- //Check decimation
- if(decimation > 1)
- {
- sample_counter++;
- if(sample_counter < decimation) continue;
- sample_counter = 0;
- }
- //Averaging
- if(averaging && decimation > 1) {
- sample = sample_sum / decimation;
- sample_sum =0;
- }
- //Store the sample
- sample_total_saved ++;
- if(bits_per_sample == 8){
- dest[sample_total_saved-1] = sample;
- data.numbits = sample_total_saved << 3;//Get the return value correct
- if(sample_total_saved >= bufsize) break;
- }
- else{
- pushBit(&data, sample & 0x80);
- if(bits_per_sample > 1) pushBit(&data, sample & 0x40);
- if(bits_per_sample > 2) pushBit(&data, sample & 0x20);
- if(bits_per_sample > 3) pushBit(&data, sample & 0x10);
- if(bits_per_sample > 4) pushBit(&data, sample & 0x08);
- if(bits_per_sample > 5) pushBit(&data, sample & 0x04);
- if(bits_per_sample > 6) pushBit(&data, sample & 0x02);
- //Not needed, 8bps is covered above
- //if(bits_per_sample > 7) pushBit(&data, sample & 0x01);
- if((data.numbits >> 3) +1 >= bufsize) break;
- }
- }
- }
-
- if(!silent)
- {
- Dbprintf("Done, saved %d out of %d seen samples at %d bits/sample",sample_total_saved, sample_total_numbers,bits_per_sample);
- Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
- dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
- }
- return data.numbits;
-}
-/**
-* Perform sample aquisition.
-*/
-void DoAcquisition125k(int trigger_threshold)
-{
- DoAcquisition125k_internal(trigger_threshold, false);
-}
-
-/**
-* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
-* if not already loaded, sets divisor and starts up the antenna.
-* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz
-* 0 or 95 ==> 125 KHz
-*
-**/
-void LFSetupFPGAForADC(int divisor, bool lf_field)
-{
- FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
- if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
- else if (divisor == 0)
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- else
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
-
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0));
-
- // Connect the A/D to the peak-detected low-frequency path.
- SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
- // Give it a bit of time for the resonant antenna to settle.
- SpinDelay(50);
- // Now set up the SSC to get the ADC samples that are now streaming at us.
- FpgaSetupSsc();
-}
-/**
-* Initializes the FPGA, and acquires the samples.
-**/
-void AcquireRawAdcSamples125k(int divisor,int arg1, int arg2)
-{
- if (arg1 != 0)
- {
- averaging = (arg1 & 0x80) != 0;
- bits_per_sample = (arg1 & 0x0F);
- }
- if(arg2 != 0)
- {
- decimation = arg2;
- }
-
- Dbprintf("Sampling config: ");
- Dbprintf(" divisor: %d ", divisor);
- Dbprintf(" bps: %d ", bits_per_sample);
- Dbprintf(" decimation: %d ", decimation);
- Dbprintf(" averaging: %d ", averaging);
-
- LFSetupFPGAForADC(divisor, true);
- // Now call the acquisition routine
- DoAcquisition125k_internal(-1,false);
-}
-/**
-* Initializes the FPGA for snoop-mode, and acquires the samples.
-**/
-
-void SnoopLFRawAdcSamples(int divisor, int trigger_threshold)
-{
- LFSetupFPGAForADC(divisor, false);
- DoAcquisition125k(trigger_threshold);
-}
-
void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
{
- /* Make sure the tag is reset */
- FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- SpinDelay(2500);
-
-
int divisor_used = 95; // 125 KHz
// see if 'h' was specified
if (command[strlen((char *) command) - 1] == 'h')
divisor_used = 88; // 134.8 KHz
+ sample_config sc = { 0,0,1, divisor_used, 0};
+ setSamplingConfig(&sc);
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
- // Give it a bit of time for the resonant antenna to settle.
- SpinDelay(50);
+ /* Make sure the tag is reset */
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ SpinDelay(2500);
- // And a little more time for the tag to fully power up
- SpinDelay(2000);
+ LFSetupFPGAForADC(sc.divisor, 1);
- // Now set up the SSC to get the ADC samples that are now streaming at us.
- FpgaSetupSsc();
+ // And a little more time for the tag to fully power up
+ SpinDelay(2000);
// now modulate the reader field
while(*command != '\0' && *command != ' ') {
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_D_OFF();
SpinDelayUs(delay_off);
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
LED_D_ON();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_D_OFF();
SpinDelayUs(delay_off);
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// now do the read
- DoAcquisition125k(-1);
+ DoAcquisition_config(false);
}
+
+
/* blank r/w tag data stream
...0000000000000000 01111111
1010101010101010101010101010101010101010101010101010101010101010
WDT_HIT();
if (ledcontrol) LED_A_ON();
- DoAcquisition125k_internal(-1,true);
- // FSK demodulator
+ DoAcquisition_default(-1,true);
+ // FSK demodulator
size = HIDdemodFSK(dest, sizeof(BigBuf), &hi2, &hi, &lo);
WDT_HIT();
WDT_HIT();
if (ledcontrol) LED_A_ON();
- DoAcquisition125k_internal(-1,true);
- size = sizeof(BigBuf);
+ DoAcquisition_default(-1,true);
+ size = sizeof(BigBuf);
//Dbprintf("DEBUG: Buffer got");
//askdemod and manchester decode
errCnt = askmandemod(dest, &size, &clk, &invert);
while(!BUTTON_PRESS()) {
WDT_HIT();
if (ledcontrol) LED_A_ON();
- DoAcquisition125k_internal(-1,true);
- //fskdemod and get start index
+ DoAcquisition_default(-1,true);
+ //fskdemod and get start index
WDT_HIT();
idx = IOdemodFSK(dest,sizeof(BigBuf));
if (idx>0){
int lmin=128, lmax=128;
uint8_t dir;
- AcquireRawAdcSamples125k(0,0,0);
+ LFSetupFPGAForADC(95, true);
+ DoAcquisition_default(0, 0);
+
lmin = 64;
lmax = 192;
--- /dev/null
+//-----------------------------------------------------------------------------
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Miscellaneous routines for low frequency sampling.
+//-----------------------------------------------------------------------------
+
+#include "proxmark3.h"
+#include "apps.h"
+#include "util.h"
+#include "string.h"
+
+#include "lfsampling.h"
+
+sample_config config = { 1, 8, 1, 88, 0 } ;
+
+void printConfig()
+{
+ Dbprintf("Sampling config: ");
+ Dbprintf(" [q] divisor: %d ", config.divisor);
+ Dbprintf(" [b] bps: %d ", config.bits_per_sample);
+ Dbprintf(" [d] decimation: %d ", config.decimation);
+ Dbprintf(" [a] averaging: %d ", config.averaging);
+ Dbprintf(" [t] trigger threshold: %d ", config.trigger_threshold);
+}
+
+
+/**
+ * Called from the USB-handler to set the sampling configuration
+ * The sampling config is used for std reading and snooping.
+ *
+ * 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)
+{
+ if(sc->divisor != 0) config.divisor = sc->divisor;
+ if(sc->bits_per_sample!= 0) config.bits_per_sample= sc->bits_per_sample;
+ if(sc->decimation!= 0) config.decimation= sc->decimation;
+ if(sc->trigger_threshold != -1) config.trigger_threshold= sc->trigger_threshold;
+
+ config.averaging= sc->averaging;
+ if(config.bits_per_sample > 8) config.bits_per_sample = 8;
+ if(config.decimation < 1) config.decimation = 1;
+
+ printConfig();
+}
+
+sample_config* getSamplingConfig()
+{
+ return &config;
+}
+
+typedef struct {
+ uint8_t * buffer;
+ uint32_t numbits;
+ uint32_t position;
+} BitstreamOut;
+
+
+/**
+ * @brief Pushes bit onto the stream
+ * @param stream
+ * @param bit
+ */
+void pushBit( BitstreamOut* stream, uint8_t bit)
+{
+ int bytepos = stream->position >> 3; // divide by 8
+ int bitpos = stream->position & 7;
+ *(stream->buffer+bytepos) |= (bit > 0) << (7 - bitpos);
+ stream->position++;
+ stream->numbits++;
+}
+
+/**
+* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
+* if not already loaded, sets divisor and starts up the antenna.
+* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz
+* 0 or 95 ==> 125 KHz
+*
+**/
+void LFSetupFPGAForADC(int divisor, bool lf_field)
+{
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
+ else if (divisor == 0)
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+ else
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0));
+
+ // Connect the A/D to the peak-detected low-frequency path.
+ SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+ // Give it a bit of time for the resonant antenna to settle.
+ SpinDelay(50);
+ // Now set up the SSC to get the ADC samples that are now streaming at us.
+ FpgaSetupSsc();
+}
+
+
+/**
+ * Does the sample acquisition. If threshold is specified, the actual sampling
+ * is not commenced until the threshold has been reached.
+ * This method implements decimation and quantization in order to
+ * be able to provide longer sample traces.
+ * Uses the following global settings:
+ * @param decimation - how much should the signal be decimated. A decimation of N means we keep 1 in N samples, etc.
+ * @param bits_per_sample - bits per sample. Max 8, min 1 bit per sample.
+ * @param averaging If set to true, decimation will use averaging, so that if e.g. decimation is 3, the sample
+ * value that will be used is the average value of the three samples.
+ * @param trigger_threshold - a threshold. The sampling won't commence until this threshold has been reached. Set
+ * to -1 to ignore threshold.
+ * @param silent - is true, now outputs are made. If false, dbprints the status
+ * @return the number of bits occupied by the samples.
+ */
+
+uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold,bool silent)
+{
+ //.
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int bufsize = BIGBUF_SIZE;
+ memset(dest, 0, bufsize);
+
+ if(bits_per_sample < 1) bits_per_sample = 1;
+ if(bits_per_sample > 8) bits_per_sample = 8;
+
+ if(decimation < 1) decimation = 1;
+
+ // Use a bit stream to handle the output
+ BitstreamOut data = { dest , 0, 0};
+ int sample_counter = 0;
+ uint8_t sample = 0;
+ //If we want to do averaging
+ uint32_t sample_sum =0 ;
+ uint32_t sample_total_numbers =0 ;
+ uint32_t sample_total_saved =0 ;
+
+ while(!BUTTON_PRESS()) {
+ WDT_HIT();
+ if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ LED_D_ON();
+ }
+ if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
+ sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+ LED_D_OFF();
+ if (trigger_threshold > 0 && sample < trigger_threshold)
+ continue;
+
+ trigger_threshold = 0;
+ sample_total_numbers++;
+
+ if(averaging)
+ {
+ sample_sum += sample;
+ }
+ //Check decimation
+ if(decimation > 1)
+ {
+ sample_counter++;
+ if(sample_counter < decimation) continue;
+ sample_counter = 0;
+ }
+ //Averaging
+ if(averaging && decimation > 1) {
+ sample = sample_sum / decimation;
+ sample_sum =0;
+ }
+ //Store the sample
+ sample_total_saved ++;
+ if(bits_per_sample == 8){
+ dest[sample_total_saved-1] = sample;
+ data.numbits = sample_total_saved << 3;//Get the return value correct
+ if(sample_total_saved >= bufsize) break;
+ }
+ else{
+ pushBit(&data, sample & 0x80);
+ if(bits_per_sample > 1) pushBit(&data, sample & 0x40);
+ if(bits_per_sample > 2) pushBit(&data, sample & 0x20);
+ if(bits_per_sample > 3) pushBit(&data, sample & 0x10);
+ if(bits_per_sample > 4) pushBit(&data, sample & 0x08);
+ if(bits_per_sample > 5) pushBit(&data, sample & 0x04);
+ if(bits_per_sample > 6) pushBit(&data, sample & 0x02);
+ //Not needed, 8bps is covered above
+ //if(bits_per_sample > 7) pushBit(&data, sample & 0x01);
+ if((data.numbits >> 3) +1 >= bufsize) break;
+ }
+ }
+ }
+
+ if(!silent)
+ {
+ Dbprintf("Done, saved %d out of %d seen samples at %d bits/sample",sample_total_saved, sample_total_numbers,bits_per_sample);
+ Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
+ dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
+ }
+ return data.numbits;
+}
+/**
+ * @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 silent
+ * @return number of bits sampled
+ */
+uint32_t DoAcquisition_default(int trigger_threshold, bool silent)
+{
+ return DoAcquisition(1,8,0,trigger_threshold,silent);
+}
+uint32_t DoAcquisition_config( bool silent)
+{
+ return DoAcquisition(config.decimation
+ ,config.bits_per_sample
+ ,config.averaging
+ ,config.trigger_threshold
+ ,silent);
+}
+
+uint32_t ReadLF(bool activeField)
+{
+ printConfig();
+ LFSetupFPGAForADC(config.divisor, activeField);
+ // Now call the acquisition routine
+ return DoAcquisition_config(false);
+}
+
+/**
+* Initializes the FPGA for reader-mode (field on), and acquires the samples.
+* @return number of bits sampled
+**/
+uint32_t SampleLF()
+{
+ return ReadLF(true);
+}
+/**
+* Initializes the FPGA for snoop-mode (field off), and acquires the samples.
+* @return number of bits sampled
+**/
+
+uint32_t SnoopLF()
+{
+ return ReadLF(false);
+}
--- /dev/null
+#ifndef LFSAMPLING_H
+#define LFSAMPLING_H
+
+/**
+* Initializes the FPGA for reader-mode (field on), and acquires the samples.
+* @return number of bits sampled
+**/
+uint32_t SampleLF();
+
+/**
+* Initializes the FPGA for snoop-mode (field off), and acquires the samples.
+* @return number of bits sampled
+**/
+
+uint32_t SnoopLF();
+
+/**
+ * @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 silent
+ * @return number of bits sampled
+ */
+uint32_t DoAcquisition_default(int trigger_threshold, bool silent);
+/**
+ * @brief Does sample acquisition, using the config values set in the sample_config.
+ * @param trigger_threshold
+ * @param silent
+ * @return number of bits sampled
+ */
+
+uint32_t DoAcquisition_config( bool silent);
+
+/**
+* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
+* if not already loaded, sets divisor and starts up the antenna.
+* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz
+* 0 or 95 ==> 125 KHz
+*
+**/
+void LFSetupFPGAForADC(int divisor, bool lf_field);
+
+
+/**
+ * Called from the USB-handler to set the sampling configuration
+ * The sampling config is used for std reading and snooping.
+ *
+ * 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);
+
+sample_config * getSamplingConfig();
+#endif // LFSAMPLING_H
#include "cmdmain.h"
#include "cmddata.h"
#include "lfdemod.h"
+#include "usb_cmd.h"
+
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
int DemodBufferLen;
static int CmdHelp(const char *Cmd);
int CmdSamples(const char *Cmd)
{
- uint8_t got[40000];
+ //If we get all but the last byte in bigbuf,
+ // we don't have to worry about remaining trash
+ // in the last byte in case the bits-per-sample
+ // does not line up on byte boundaries
+ uint8_t got[40000-1];
int n = strtol(Cmd, NULL, 0);
if (n == 0)
- n = 20000;
+ n = sizeof(got);
if (n > sizeof(got))
n = sizeof(got);
PrintAndLog("Data fetched");
UsbCommand response;
WaitForResponse(CMD_ACK, &response);
- uint8_t bits_per_sample = response.arg[0];
- PrintAndLog("Samples packed at %d bits per sample", bits_per_sample);
+ uint8_t bits_per_sample = 8;
+
+ //Old devices without this feature would send 0 at arg[0]
+ if(response.arg[0] > 0)
+ {
+ sample_config *sc = (sample_config *) response.d.asBytes;
+ PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
+ , sc->decimation);
+ bits_per_sample = sc->bits_per_sample;
+ }
if(bits_per_sample < 8)
{
PrintAndLog("Unpacking...");
BitstreamOut bout = { got, bits_per_sample * n, 0};
int j =0;
- for (j = 0; j * bits_per_sample < n * 8 && j < GraphTraceLen; j++) {
+ for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
uint8_t sample = getByte(bits_per_sample, &bout);
GraphBuffer[j] = ((int) sample )- 128;
}
GraphBuffer[j] = ((int)got[j]) - 128;
}
GraphTraceLen = n;
-
}
RepaintGraphWindow();
return 0;
}
-int CmdLFReadUsage()
+int usage_lf_read()
{
- PrintAndLog("Usage: lf read [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
+ PrintAndLog("Usage: lf read");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
- PrintAndLog(" H High frequency (134 KHz). Defaults to 125 KHz");
- PrintAndLog(" <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
- PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
- PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
- PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
+ PrintAndLog("This function takes no arguments. ");
+ PrintAndLog("Use 'lf config' to set parameters.");
+ return 0;
+}
+int usage_lf_snoop()
+{
+ PrintAndLog("Usage: lf snoop");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog("This function takes no arguments. ");
+ PrintAndLog("Use 'lf config' to set parameters.");
+ return 0;
+}
+
+int usage_lf_config()
+{
+ PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog(" L Low frequency (125 KHz)");
+ PrintAndLog(" H High frequency (134 KHz)");
+ PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
+ PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
+ PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
+ PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
+ PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold");
PrintAndLog("Examples:");
- PrintAndLog(" lf read");
+ PrintAndLog(" lf config b 8 L");
PrintAndLog(" Samples at 125KHz, 8bps.");
- PrintAndLog(" lf read h b 4 d 3");
+ PrintAndLog(" lf config H b 4 d 3");
PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
PrintAndLog(" a resolution of 4 bits per sample.");
+ PrintAndLog(" lf read");
+ PrintAndLog(" Performs a read (active field)");
+ PrintAndLog(" lf snoop");
+ PrintAndLog(" Performs a snoop (no active field)");
return 0;
}
-int CmdLFRead(const char *Cmd)
+
+int CmdLFSetConfig(const char *Cmd)
{
- uint8_t divisor = 95;//Frequency divisor
- uint8_t bps = 8; // Bits per sample
- uint8_t decimation = 1; //How many to keep
- bool averaging = 1; // Should we use averaging when discarding samples?
+
+ uint8_t divisor = 0;//Frequency divisor
+ uint8_t bps = 0; // Bits per sample
+ uint8_t decimation = 0; //How many to keep
+ bool averaging = 1; // Defaults to true
bool errors = FALSE;
+ int trigger_threshold =-1;//Means no change
+ uint8_t unsigned_trigg = 0;
uint8_t cmdp =0;
- if(param_getchar(Cmd, cmdp) == 'h')
- {
- return CmdLFReadUsage();
- }
-
- // Divisor
- if(param_getchar(Cmd, cmdp) == 'H') {
- divisor = 88;
- cmdp++;
- }else if(param_isdec(Cmd,cmdp) )
- {
- errors |= param_getdec(Cmd,cmdp, &divisor);
- }
- //BPS
- if(param_getchar(Cmd, cmdp) == 'b') {
- errors |= param_getdec(Cmd,cmdp+1,&bps);
- cmdp+=2;
- }
- //Decimation
- if(param_getchar(Cmd, cmdp) == 'd')
+ while(param_getchar(Cmd, cmdp) != 0x00)
{
- errors |= param_getdec(Cmd,cmdp+1,&decimation);
- cmdp+=2;
+ PrintAndLog("working %c", param_getchar(Cmd, cmdp));
+ switch(param_getchar(Cmd, cmdp))
+ {
+ case 'h':
+ return usage_lf_config();
+ case 'H':
+ divisor = 88;
+ cmdp++;
+ break;
+ case 'L':
+ divisor = 95;
+ cmdp++;
+ break;
+ case 'q':
+ errors |= param_getdec(Cmd,cmdp+1,&divisor);
+ cmdp+=2;
+ break;
+ case 't':
+ errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
+ cmdp+=2;
+ if(!errors) trigger_threshold = unsigned_trigg;
+ break;
+ case 'b':
+ errors |= param_getdec(Cmd,cmdp+1,&bps);
+ cmdp+=2;
+ break;
+ case 'd':
+ errors |= param_getdec(Cmd,cmdp+1,&decimation);
+ cmdp+=2;
+ break;
+ case 'a':
+ averaging = param_getchar(Cmd,cmdp+1) == '1';
+ cmdp+=2;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = 1;
+ break;
+ }
+ if(errors) break;
}
- //Averaging
- if(param_getchar(Cmd, cmdp) == 'a')
+ if(cmdp == 0)
{
- averaging = param_getchar(Cmd,cmdp+1) == '1';
- cmdp+=2;
+ errors = 1;// No args
}
+
//Validations
if(errors)
{
- return CmdLFReadUsage();
+ return usage_lf_config();
}
-
//Bps is limited to 8, so fits in lower half of arg1
- if(bps > 8) bps = 8;
+ if(bps >> 8) bps = 8;
- //Feedback
- PrintAndLog("Sampling config: ");
- PrintAndLog(" divisor: %d ", divisor);
- PrintAndLog(" bps: %d ", bps);
- PrintAndLog(" decimation: %d ", decimation);
- PrintAndLog(" averaging: %d ", averaging);
- PrintAndLog("OBS, this is sticky on the device and affects all LF listening operations");
- PrintAndLog("To reset, issue 'lf read'");
+ sample_config config = {
+ decimation,bps,averaging,divisor,trigger_threshold
+ };
+ //Averaging is a flag on high-bit of arg[1]
+ UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
+ memcpy(c.d.asBytes,&config,sizeof(sample_config));
+ SendCommand(&c);
+ return 0;
+}
+int CmdLFRead(const char *Cmd)
+{
+
+ uint8_t cmdp =0;
+ if(param_getchar(Cmd, cmdp) == 'h')
+ {
+ return usage_lf_read();
+ }
//And ship it to device
- //Averaging is a flag on high-bit of arg[1]
UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};
- c.arg[0] = divisor;
- c.arg[1] = bps | (averaging << 7) ;
- c.arg[2] = decimation;
+ SendCommand(&c);
+ WaitForResponse(CMD_ACK,NULL);
+ return 0;
+}
+int CmdLFSnoop(const char *Cmd)
+{
+ uint8_t cmdp =0;
+ if(param_getchar(Cmd, cmdp) == 'h')
+ {
+ return usage_lf_snoop();
+ }
+
+ UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
SendCommand(&c);
WaitForResponse(CMD_ACK,NULL);
return 0;
return 0;
}
-int CmdLFSnoop(const char *Cmd)
-{
- UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
-
- // 'h' means higher-low-frequency, 134 kHz
- c.arg[0] = 0;
- c.arg[1] = -1;
-
- if (*Cmd == 'l') {
- sscanf(Cmd, "l %"lli, &c.arg[1]);
- } else if(*Cmd == 'h') {
- c.arg[0] = 1;
- sscanf(Cmd, "h %"lli, &c.arg[1]);
- } else if (sscanf(Cmd, "%"lli" %"lli, &c.arg[0], &c.arg[1]) < 1) {
- PrintAndLog("usage 1: snoop");
- PrintAndLog(" 2: snoop {l,h} [trigger threshold]");
- PrintAndLog(" 3: snoop <divisor> [trigger threshold]");
- return 0;
- }
-
- SendCommand(&c);
- WaitForResponse(CMD_ACK,NULL);
- return 0;
-}
int CmdVchDemod(const char *Cmd)
{
{"help", CmdHelp, 1, "This help"},
{"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
{"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
+ {"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
{"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
{"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
{"io", CmdLFIO, 1, "{ ioProx tags... }"},
{"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
{"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
- {"read", CmdLFRead, 0, "['h' or <divisor>] -- Read 125/134 kHz LF ID-only tag (option 'h' for 134, alternatively: f=12MHz/(divisor+1))"},
+ {"read", CmdLFRead, 0, "Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
{"search", CmdLFfind, 1, "Read and Search for valid known tag (in offline mode it you can load first then search)"},
{"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
{"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
return 0;
}
+
char param_getchar(const char *line, int paramnum)
{
int bg, en;
}
/**
- * @brief Reads a decimal integer
+ * @brief Reads a decimal integer (actually, 0-254, not 255)
* @param line
* @param paramnum
- * @return
+ * @return -1 if error
*/
uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
{
- uint8_t val = param_get8ex(line, paramnum, 10, 10);
+ uint8_t val = param_get8ex(line, paramnum, 255, 10);
+ printf("read %i", (int8_t ) val);
+ if( (int8_t) val == -1) return 1;
(*destination) = val;
return 0;
}
uint32_t asDwords[USB_CMD_DATA_SIZE/4];
} d;
} PACKED UsbCommand;
+// A struct used to send sample-configs over USB
+typedef struct{
+ uint8_t decimation;
+ uint8_t bits_per_sample;
+ bool averaging;
+ int divisor;
+ int trigger_threshold;
+} sample_config;
// For the bootloader
#define CMD_DEVICE_INFO 0x0000
#define CMD_IO_DEMOD_FSK 0x021A
#define CMD_IO_CLONE_TAG 0x021B
#define CMD_EM410X_DEMOD 0x021c
+// Sampling configuration for LF reader/snooper
+#define CMD_SET_LF_SAMPLING_CONFIG 0x021d
/* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */
#define FLAG_ICLASS_READER_ONLY_ONCE 0x01
#define FLAG_ICLASS_READER_GET_CC 0x02
+
// CMD_DEVICE_INFO response packet has flags in arg[0], flag definitions:
/* Whether a bootloader that understands the common_area is present */
#define DEVICE_INFO_FLAG_BOOTROM_PRESENT (1<<0)
projects / proxmark3-svn / commitdiff