diff --git a/armsrc/Makefile b/armsrc/Makefile index b9019541e..4e460623f 100644 --- a/armsrc/Makefile +++ b/armsrc/Makefile @@ -14,7 +14,7 @@ APP_CFLAGS = -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ #-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 diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 83d9dd1fb..32b7e5924 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -23,7 +23,7 @@ #include "legicrf.h" #include - +#include "lfsampling.h" #ifdef WITH_LCD #include "LCD.h" #endif @@ -629,16 +629,17 @@ void UsbPacketReceived(uint8_t *packet, int len) 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); @@ -910,7 +911,8 @@ void UsbPacketReceived(uint8_t *packet, int len) 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; diff --git a/armsrc/apps.h b/armsrc/apps.h index 110e03b3a..89440bfec 100644 --- a/armsrc/apps.h +++ b/armsrc/apps.h @@ -81,8 +81,6 @@ int AvgAdc(int ch); 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[]; @@ -147,7 +145,7 @@ extern uint8_t decimation; 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); diff --git a/armsrc/lfops.c b/armsrc/lfops.c index c10314473..43af4eed4 100644 --- a/armsrc/lfops.c +++ b/armsrc/lfops.c @@ -15,231 +15,44 @@ #include "crc16.h" #include "string.h" #include "lfdemod.h" - -uint8_t decimation = 1; -uint8_t bits_per_sample = 8; -bool averaging = 1; +#include "lfsampling.h" -typedef struct { - uint8_t * buffer; - uint32_t numbits; - uint32_t position; -} BitstreamOut; /** - * @brief Pushes bit onto the stream - * @param stream - * @param bit + * Function to do a modulation and then get samples. + * @param delay_off + * @param period_0 + * @param period_1 + * @param command */ -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. - */ -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(); @@ -251,14 +64,16 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, 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 @@ -745,8 +560,8 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol) 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(); @@ -833,8 +648,8 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol) 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); @@ -884,8 +699,8 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol) 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){ @@ -1489,7 +1304,9 @@ int DemodPCF7931(uint8_t **outBlocks) { int lmin=128, lmax=128; uint8_t dir; - AcquireRawAdcSamples125k(0,0,0); + LFSetupFPGAForADC(95, true); + DoAcquisition_default(0, 0); + lmin = 64; lmax = 192; diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c new file mode 100644 index 000000000..6314ac746 --- /dev/null +++ b/armsrc/lfsampling.c @@ -0,0 +1,251 @@ +//----------------------------------------------------------------------------- +// 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); +} diff --git a/armsrc/lfsampling.h b/armsrc/lfsampling.h new file mode 100644 index 000000000..9ab458f81 --- /dev/null +++ b/armsrc/lfsampling.h @@ -0,0 +1,59 @@ +#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 diff --git a/client/cmddata.c b/client/cmddata.c index 793845807..fa056b679 100644 --- a/client/cmddata.c +++ b/client/cmddata.c @@ -21,6 +21,8 @@ #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); @@ -1077,11 +1079,15 @@ uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b) 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); @@ -1091,14 +1097,22 @@ int CmdSamples(const char *Cmd) 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; } @@ -1110,7 +1124,6 @@ int CmdSamples(const char *Cmd) GraphBuffer[j] = ((int)got[j]) - 128; } GraphTraceLen = n; - } RepaintGraphWindow(); diff --git a/client/cmdlf.c b/client/cmdlf.c index 93a9f5866..09d930024 100644 --- a/client/cmdlf.c +++ b/client/cmdlf.c @@ -356,88 +356,152 @@ int CmdIndalaClone(const char *Cmd) return 0; } -int CmdLFReadUsage() +int usage_lf_read() { - PrintAndLog("Usage: lf read [H|] [b ] [d ] [a 0|1]"); + PrintAndLog("Usage: lf read"); PrintAndLog("Options: "); PrintAndLog(" h This help"); - PrintAndLog(" H High frequency (134 KHz). Defaults to 125 KHz"); - PrintAndLog(" Manually set divisor. 88-> 134KHz, 95-> 125 Hz"); - PrintAndLog(" b Sets resolution of bits per sample. Default (max): 8"); - PrintAndLog(" d 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("Examples:"); - PrintAndLog(" lf read"); - PrintAndLog(" Samples at 125KHz, 8bps."); - PrintAndLog(" lf read 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("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|] [b ] [d ] [a 0|1]"); + PrintAndLog("Options: "); + PrintAndLog(" h This help"); + PrintAndLog(" L Low frequency (125 KHz)"); + PrintAndLog(" H High frequency (134 KHz)"); + PrintAndLog(" q Manually set divisor. 88-> 134KHz, 95-> 125 Hz"); + PrintAndLog(" b Sets resolution of bits per sample. Default (max): 8"); + PrintAndLog(" d 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 Sets trigger threshold. 0 means no threshold"); + PrintAndLog("Examples:"); + PrintAndLog(" lf config b 8 L"); + PrintAndLog(" Samples at 125KHz, 8bps."); + 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 CmdLFSetConfig(const char *Cmd) +{ + + 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; + while(param_getchar(Cmd, cmdp) != 0x00) + { + 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; + } + if(cmdp == 0) + { + errors = 1;// No args + } + + //Validations + if(errors) + { + return usage_lf_config(); + } + //Bps is limited to 8, so fits in lower half of arg1 + if(bps >> 8) bps = 8; + + 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 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? - bool errors = FALSE; uint8_t cmdp =0; if(param_getchar(Cmd, cmdp) == 'h') { - return CmdLFReadUsage(); + return usage_lf_read(); } - - // 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') - { - errors |= param_getdec(Cmd,cmdp+1,&decimation); - cmdp+=2; - } - //Averaging - if(param_getchar(Cmd, cmdp) == 'a') - { - averaging = param_getchar(Cmd,cmdp+1) == '1'; - cmdp+=2; - } - //Validations - if(errors) - { - return CmdLFReadUsage(); - } - - //Bps is limited to 8, so fits in lower half of arg1 - 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'"); - //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; @@ -517,30 +581,6 @@ int CmdLFSimManchester(const char *Cmd) 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 [trigger threshold]"); - return 0; - } - - SendCommand(&c); - WaitForResponse(CMD_ACK,NULL); - return 0; -} int CmdVchDemod(const char *Cmd) { @@ -673,12 +713,13 @@ static command_t CommandTable[] = {"help", CmdHelp, 1, "This help"}, {"cmdread", CmdLFCommandRead, 0, " <'0' period> <'1' period> ['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, " ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"}, - {"read", CmdLFRead, 0, "['h' or ] -- 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)"}, diff --git a/client/util.c b/client/util.c index bce1c122e..6b47eab9e 100644 --- a/client/util.c +++ b/client/util.c @@ -213,6 +213,7 @@ int param_getptr(const char *line, int *bg, int *en, int paramnum) return 0; } + char param_getchar(const char *line, int paramnum) { int bg, en; @@ -228,14 +229,16 @@ uint8_t param_get8(const char *line, int paramnum) } /** - * @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; } diff --git a/include/usb_cmd.h b/include/usb_cmd.h index 69c3c1b6a..6ee6509eb 100644 --- a/include/usb_cmd.h +++ b/include/usb_cmd.h @@ -33,6 +33,14 @@ typedef struct { 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 @@ -82,6 +90,8 @@ typedef struct { #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 */ @@ -187,6 +197,7 @@ typedef struct { #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)