#include "iso14443a.h"
#endif
-#define abs(x) ( ((x)<0) ? -(x) : (x) )
-
//=============================================================================
// A buffer where we can queue things up to be sent through the FPGA, for
// any purpose (fake tag, as reader, whatever). We go MSB first, since that
if (limit != HF_ONLY) {
if(mode == 1) {
- if (abs(lf_av - lf_baseline) > REPORT_CHANGE)
+ if (ABS(lf_av - lf_baseline) > REPORT_CHANGE)
LED_D_ON();
else
LED_D_OFF();
lf_av_new = AvgAdc(ADC_CHAN_LF);
// see if there's a significant change
- if(abs(lf_av - lf_av_new) > REPORT_CHANGE) {
+ if(ABS(lf_av - lf_av_new) > REPORT_CHANGE) {
Dbprintf("LF 125/134kHz Field Change: %5dmV", (MAX_ADC_LF_VOLTAGE * lf_av_new) >> 10);
lf_av = lf_av_new;
if (lf_av > lf_max)
if (limit != LF_ONLY) {
if (mode == 1){
- if (abs(hf_av - hf_baseline) > REPORT_CHANGE)
+ if (ABS(hf_av - hf_baseline) > REPORT_CHANGE)
LED_B_ON();
else
LED_B_OFF();
hf_av_new = AvgAdc(ADC_CHAN_HF);
// see if there's a significant change
- if(abs(hf_av - hf_av_new) > REPORT_CHANGE) {
+ if(ABS(hf_av - hf_av_new) > REPORT_CHANGE) {
Dbprintf("HF 13.56MHz Field Change: %5dmV", (MAX_ADC_HF_VOLTAGE * hf_av_new) >> 10);
hf_av = hf_av_new;
if (hf_av > hf_max)
}
*/
// Subcarrier amplitude v = sqrt(ci^2 + cq^2), approximated here by max(abs(ci),abs(cq)) + 1/2*min(abs(ci),abs(cq)))
+
+ //note: couldn't we just use MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2) from common.h - marshmellow
#define CHECK_FOR_SUBCARRIER() { \
+ v = MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2); \
+ }
+ /*
if(ci < 0) { \
- if(cq < 0) { /* ci < 0, cq < 0 */ \
+ if(cq < 0) { \ // ci < 0, cq < 0
if (cq < ci) { \
v = -cq - (ci >> 1); \
} else { \
v = -ci - (cq >> 1); \
} \
- } else { /* ci < 0, cq >= 0 */ \
+ } else { \ // ci < 0, cq >= 0
if (cq < -ci) { \
v = -ci + (cq >> 1); \
} else { \
} \
} \
} else { \
- if(cq < 0) { /* ci >= 0, cq < 0 */ \
+ if(cq < 0) { \ // ci >= 0, cq < 0
if (-cq < ci) { \
v = ci - (cq >> 1); \
} else { \
v = -cq + (ci >> 1); \
} \
- } else { /* ci >= 0, cq >= 0 */ \
+ } else { \ // ci >= 0, cq >= 0
if (cq < ci) { \
v = ci + (cq >> 1); \
} else { \
} \
} \
}
+ */
switch(Demod.state) {
case DEMOD_UNSYNCD:
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
- int8_t r;
-
- if(b < 0) {
- r = -b;
- } else {
- r = b;
- }
- if(prev < 0) {
- r -= prev;
- } else {
- r += prev;
- }
+ int8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
- int8_t r;
-
- if(b < 0) {
- r = -b;
- } else {
- r = b;
- }
- if(prev < 0) {
- r -= prev;
- } else {
- r += prev;
- }
+ int8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
- int8_t r;
-
- if(b < 0) {
- r = -b;
- } else {
- r = b;
- }
- if(prev < 0) {
- r -= prev;
- } else {
- r += prev;
- }
+ int8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
- int8_t r;
-
- if(b < 0) {
- r = -b;
- } else {
- r = b;
- }
- if(prev < 0) {
- r -= prev;
- } else {
- r += prev;
- }
+ int8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
AcquireTiType();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- DbpString("Now use tiread to check");
+ DbpString("Now use `lf ti read` to check");
}
void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
memset(dest+(*n), c ^ *phase, clock);
*phase ^= 1;
}
+ *n += clock;
+}
+
+static void stAskSimBit(int *n, uint8_t clock) {
+ uint8_t *dest = BigBuf_get_addr();
+ uint8_t halfClk = clock/2;
+ //ST = .5 high .5 low 1.5 high .5 low 1 high
+ memset(dest+(*n), 1, halfClk);
+ memset(dest+(*n) + halfClk, 0, halfClk);
+ memset(dest+(*n) + clock, 1, clock + halfClk);
+ memset(dest+(*n) + clock*2 + halfClk, 0, halfClk);
+ memset(dest+(*n) + clock*3, 1, clock);
+ *n += clock*4;
}
// args clock, ask/man or askraw, invert, transmission separator
for (i=0; i<size; i++){
biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
}
- if (BitStream[0]==BitStream[size-1]){ //run a second set inverted to keep phase in check
+ if (phase==1) { //run a second set inverted to keep phase in check
for (i=0; i<size; i++){
biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
}
}
}
}
-
- if (separator==1) Dbprintf("sorry but separator option not yet available");
+ if (separator==1 && encoding == 1)
+ stAskSimBit(&n, clk);
+ else if (separator==1)
+ Dbprintf("sorry but separator option not yet available");
Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
//DEBUG
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
//i+=16;
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-
+
if (ledcontrol) LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol) LED_A_OFF();
LED_D_ON();
// Write EM410x ID
- uint32_t data[] = {0, id>>32, id & 0xFFFFFFFF};
+ uint32_t data[] = {0, (uint32_t)(id>>32), (uint32_t)(id & 0xFFFFFFFF)};
clock = (card & 0xFF00) >> 8;
clock = (clock == 0) ? 64 : clock;
#define T0_PCF 8 //period for the pcf7931 in us
#define ALLOC 16
-#define abs(x) ( ((x)<0) ? -(x) : (x) )
-#define max(x,y) ( x<y ? y:x)
-
int DemodPCF7931(uint8_t **outBlocks) {
uint8_t bits[256] = {0x00};
// Switch depending on lc length:
// Tolerance is 1/8 of clock rate (arbitrary)
- if (abs(lc-clock/4) < tolerance) {
+ if (ABS(lc-clock/4) < tolerance) {
// 16T0
if((i - pmc) == lc) { /* 16T0 was previous one */
/* It's a PMC ! */
else {
pmc = i;
}
- } else if (abs(lc-clock/2) < tolerance) {
+ } else if (ABS(lc-clock/2) < tolerance) {
// 32TO
if((i - pmc) == lc) { /* 16T0 was previous one */
/* It's a PMC ! */
}
else
half_switch++;
- } else if (abs(lc-clock) < tolerance) {
+ } else if (ABS(lc-clock) < tolerance) {
// 64TO
bits[bitidx++] = 1;
} else {
Blocks[0][ALLOC] = 1;
memcpy(Blocks[1], tmpBlocks[i+1], 16);
Blocks[1][ALLOC] = 1;
- max_blocks = max((Blocks[1][14] & 0x7f), Blocks[1][15]) + 1;
+ max_blocks = MAX((Blocks[1][14] & 0x7f), Blocks[1][15]) + 1;
// Debug print
Dbprintf("(dbg) Max blocks: %d", max_blocks);
num_blocks = 2;
cmdlft55xx.c \
cmdlfpcf7931.c\
cmdlfviking.c\
+ cmdlfpresco.c\
+ cmdlfpyramid.c\
pm3_binlib.c\
scripting.c\
cmdscript.c\
// Data and Graph commands
//-----------------------------------------------------------------------------
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include "proxmark3.h"
-#include "data.h"
-#include "ui.h"
-#include "graph.h"
-#include "cmdparser.h"
+#include <stdio.h> // also included in util.h
+#include <string.h> // also included in util.h
+#include <limits.h> // for CmdNorm INT_MIN && INT_MAX
+#include "data.h" // also included in util.h
+#include "cmddata.h"
#include "util.h"
#include "cmdmain.h"
-#include "cmddata.h"
-#include "lfdemod.h"
-#include "usb_cmd.h"
-#include "crc.h"
-#include "crc16.h"
-#include "loclass/cipherutils.h"
+#include "proxmark3.h"
+#include "ui.h" // for show graph controls
+#include "graph.h" // for graph data
+#include "cmdparser.h"// already included in cmdmain.h
+#include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
+#include "lfdemod.h" // for demod code
+#include "crc.h" // for pyramid checksum maxim
+#include "crc16.h" // for FDXB demod checksum
+#include "loclass/cipherutils.h" // for decimating samples in getsamples
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode=0;
int CmdG_Prox_II_Demod(const char *Cmd)
{
if (!ASKbiphaseDemod(Cmd, FALSE)){
- if (g_debugMode) PrintAndLog("ASKbiphaseDemod failed 1st try");
+ if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
return 0;
}
size_t size = DemodBufferLen;
if (g_debugMode) PrintAndLog("Error gProxII_Demod");
return 0;
}
- //got a good demod
- uint32_t ByteStream[65] = {0x00};
+ //got a good demod of 96 bits
+ uint8_t ByteStream[8] = {0x00};
uint8_t xorKey=0;
- uint8_t keyCnt=0;
- uint8_t bitCnt=0;
- uint8_t ByteCnt=0;
- size_t startIdx = ans + 6; //start after preamble
- for (size_t idx = 0; idx<size-6; idx++){
- if ((idx+1) % 5 == 0){
- //spacer bit - should be 0
- if (DemodBuffer[startIdx+idx] != 0) {
- if (g_debugMode) PrintAndLog("Error spacer not 0: %u, pos: %u", (unsigned int)DemodBuffer[startIdx+idx],(unsigned int)(startIdx+idx));
- return 0;
- }
- continue;
- }
- if (keyCnt<8){ //lsb first
- xorKey = xorKey | (DemodBuffer[startIdx+idx]<<keyCnt);
- keyCnt++;
- if (keyCnt==8 && g_debugMode) PrintAndLog("xorKey Found: %02x", (unsigned int)xorKey);
- continue;
- }
- //lsb first
- ByteStream[ByteCnt] = ByteStream[ByteCnt] | (DemodBuffer[startIdx+idx]<<bitCnt);
- bitCnt++;
- if (bitCnt % 8 == 0){
- if (g_debugMode) PrintAndLog("byte %u: %02x", (unsigned int)ByteCnt, ByteStream[ByteCnt]);
- bitCnt=0;
- ByteCnt++;
- }
+ size_t startIdx = ans + 6; //start after 6 bit preamble
+
+ uint8_t bits_no_spacer[90];
+ //so as to not mess with raw DemodBuffer copy to a new sample array
+ memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
+ // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
+ size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
+ if (bitLen != 72) {
+ if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
+ return 0;
}
- for (uint8_t i = 0; i < ByteCnt; i++){
- ByteStream[i] ^= xorKey; //xor
- if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)i, ByteStream[i]);
+ // get key and then get all 8 bytes of payload decoded
+ xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
+ for (size_t idx = 0; idx < 8; idx++) {
+ ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
+ if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
}
- //now ByteStream contains 64 bytes of decrypted raw tag data
+ //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
//
uint8_t fmtLen = ByteStream[0]>>2;
uint32_t FC = 0;
uint32_t Card = 0;
+ //get raw 96 bits to print
uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
if (fmtLen==36){
FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
- PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d", fmtLen, FC, Card);
+ PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
} else if(fmtLen==26){
FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
- PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d",(unsigned int)fmtLen,FC,Card);
+ PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
} else {
PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
+ PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
}
PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
setDemodBuf(DemodBuffer+ans, 96, 0);
uint8_t factor = param_get8ex(Cmd, 0,2, 10);
//We have memory, don't we?
int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
- uint32_t g_index = 0 ,s_index = 0;
- while(g_index < GraphTraceLen && s_index < MAX_GRAPH_TRACE_LEN)
+ uint32_t g_index = 0, s_index = 0;
+ while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
{
int count = 0;
- for(count = 0; count < factor && s_index+count < MAX_GRAPH_TRACE_LEN; count ++)
+ for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
swap[s_index+count] = GraphBuffer[g_index];
- s_index+=count;
+
+ s_index += count;
+ g_index++;
}
- memcpy(GraphBuffer,swap, s_index * sizeof(int));
+ memcpy(GraphBuffer, swap, s_index * sizeof(int));
GraphTraceLen = s_index;
RepaintGraphWindow();
return 0;
//get binary from fsk wave
int idx = AWIDdemodFSK(BitStream, &size);
if (idx<=0){
- if (g_debugMode==1){
+ if (g_debugMode){
if (idx == -1)
PrintAndLog("DEBUG: Error - not enough samples");
else if (idx == -2)
size = removeParity(BitStream, idx+8, 4, 1, 88);
if (size != 66){
- if (g_debugMode==1) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
+ if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
return 0;
}
// ok valid card found!
//get binary from fsk wave
int idx = PyramiddemodFSK(BitStream, &size);
if (idx < 0){
- if (g_debugMode==1){
+ if (g_debugMode){
if (idx == -5)
PrintAndLog("DEBUG: Error - not enough samples");
else if (idx == -1)
size = removeParity(BitStream, idx+8, 8, 1, 120);
if (size != 105){
- if (g_debugMode==1)
+ if (g_debugMode)
PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
return 0;
}
}
if (!ans){
- if (g_debugMode==1)
+ if (g_debugMode)
PrintAndLog("Error1: %d",ans);
return 0;
}
uint8_t invert=0;
size_t size = DemodBufferLen;
- size_t startIdx = indala26decode(DemodBuffer, &size, &invert);
- if (startIdx < 1 || size > 224) {
- if (g_debugMode==1)
+ int startIdx = indala26decode(DemodBuffer, &size, &invert);
+ if (startIdx < 0 || size > 224) {
+ if (g_debugMode)
PrintAndLog("Error2: %d",ans);
return -1;
}
- setDemodBuf(DemodBuffer, size, startIdx);
+ setDemodBuf(DemodBuffer, size, (size_t)startIdx);
if (invert)
- if (g_debugMode==1)
+ if (g_debugMode)
PrintAndLog("Had to invert bits");
PrintAndLog("BitLen: %d",DemodBufferLen);
return 0;
}
-int usage_data_hex2bin(){
-
- PrintAndLog("Usage: data bin2hex <binary_digits>");
+int usage_data_hex2bin() {
+ PrintAndLog("Usage: data hex2bin <hex_digits>");
PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
return 0;
#ifndef CMDDATA_H__
#define CMDDATA_H__
+#include <stdlib.h> //size_t
+#include <stdint.h> //uint_32+
+#include <stdbool.h> //bool
+
+#include "cmdparser.h" // for command_t
+
command_t * CmdDataCommands();
int CmdData(const char *Cmd);
#include <string.h>
#include <limits.h>
#include "proxmark3.h"
-#include "data.h"
-#include "graph.h"
-#include "ui.h"
-#include "cmdparser.h"
-#include "cmdmain.h"
-#include "cmddata.h"
-#include "util.h"
#include "cmdlf.h"
-#include "cmdlfhid.h"
-#include "cmdlfawid.h"
-#include "cmdlfti.h"
-#include "cmdlfem4x.h"
-#include "cmdlfhitag.h"
-#include "cmdlft55xx.h"
-#include "cmdlfpcf7931.h"
-#include "cmdlfio.h"
-#include "cmdlfviking.h"
-#include "lfdemod.h"
+#include "lfdemod.h" // for psk2TOpsk1
+#include "util.h" // for parsing cli command utils
+#include "ui.h" // for show graph controls
+#include "graph.h" // for graph data
+#include "cmdparser.h" // for getting cli commands included in cmdmain.h
+#include "cmdmain.h" // for sending cmds to device
+#include "data.h" // for GetFromBigBuf
+#include "cmddata.h" // for `lf search`
+#include "cmdlfawid.h" // for awid menu
+#include "cmdlfem4x.h" // for em4x menu
+#include "cmdlfhid.h" // for hid menu
+#include "cmdlfhitag.h" // for hitag menu
+#include "cmdlfio.h" // for ioprox menu
+#include "cmdlft55xx.h" // for t55xx menu
+#include "cmdlfti.h" // for ti menu
+#include "cmdlfpresco.h" // for presco menu
+#include "cmdlfpcf7931.h"// for pcf7931 menu
+#include "cmdlfpyramid.h"// for pyramid menu
+#include "cmdlfviking.h" // for viking menu
static int CmdHelp(const char *Cmd);
return usage_lf_config();
}
//Bps is limited to 8, so fits in lower half of arg1
- if(bps >> 8) bps = 8;
+ if(bps >> 4) bps = 8;
sample_config config = {
decimation,bps,averaging,divisor,trigger_threshold
PrintAndLog(" b sim ask/biphase");
PrintAndLog(" m sim ask/manchester - Default");
PrintAndLog(" r sim ask/raw");
- PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
+ PrintAndLog(" s add t55xx Sequence Terminator gap - default: no gaps (only manchester)");
PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
return 0;
}
{"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
{"hitag", CmdLFHitag, 1, "{ Hitag tags and transponders... }"},
{"io", CmdLFIO, 1, "{ ioProx tags... }"},
+ {"presco", CmdLFPresco, 1, "{ Presco RFIDs... }"},
{"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
+ {"pyramid", CmdLFPyramid, 1, "{ Farpointe/Pyramid RFIDs... }"},
{"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
{"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
{"viking", CmdLFViking, 1, "{ Viking tags... }"},
--- /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.
+//-----------------------------------------------------------------------------
+// Low frequency Presco tag commands
+//-----------------------------------------------------------------------------
+#include <string.h>
+#include <inttypes.h>
+#include "cmdlfpresco.h"
+#include "proxmark3.h"
+#include "ui.h"
+#include "util.h"
+#include "graph.h"
+#include "cmdparser.h"
+#include "cmddata.h"
+#include "cmdmain.h"
+#include "cmdlf.h"
+#include "protocols.h" // for T55xx config register definitions
+#include "lfdemod.h" // parityTest
+
+static int CmdHelp(const char *Cmd);
+
+int usage_lf_presco_clone(void){
+ PrintAndLog("clone a Presco tag to a T55x7 tag.");
+ PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
+ PrintAndLog("Options :");
+ PrintAndLog(" d <Card-ID> : 9 digit presco card ID");
+ PrintAndLog(" H <hex-ID> : 8 digit hex card number");
+ PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf presco clone d 123456789");
+ return 0;
+}
+
+int usage_lf_presco_sim(void) {
+ PrintAndLog("Enables simulation of presco card with specified card number.");
+ PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
+ PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf presco sim d <Card-ID> or H <hex-ID>");
+ PrintAndLog("Options :");
+ PrintAndLog(" d <Card-ID> : 9 digit presco card number");
+ PrintAndLog(" H <hex-ID> : 8 digit hex card number");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf presco sim d 123456789");
+ return 0;
+}
+
+// convert base 12 ID to sitecode & usercode & 8 bit other unknown code
+int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
+
+ uint8_t val = 0;
+ bool hex = false, errors = false;
+ uint8_t cmdp = 0;
+ char id[11];
+ int stringlen = 0;
+ while(param_getchar(Cmd, cmdp) != 0x00) {
+ switch(param_getchar(Cmd, cmdp)) {
+ case 'h':
+ return -1;
+ case 'H':
+ hex = true;
+ //get hex
+ *fullcode = param_get32ex(Cmd, cmdp+1, 0, 10);
+ cmdp+=2;
+ break;
+ case 'P':
+ case 'p':
+ //param get string int param_getstr(const char *line, int paramnum, char * str)
+ stringlen = param_getstr(Cmd, cmdp+1, id);
+ if (stringlen < 2) return -1;
+ cmdp+=2;
+ break;
+ case 'Q':
+ case 'q':
+ *Q5 = true;
+ cmdp++;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = 1;
+ break;
+ }
+ if(errors) break;
+ }
+ // No args
+ if(cmdp == 0) errors = 1;
+
+ //Validations
+ if(errors) return -1;
+
+ if (!hex) {
+ for (int index =0; index < strlen(id); ++index) {
+ // Get value from number string.
+ if ( id[index] == '*' ) val = 10;
+ if ( id[index] == '#') val = 11;
+ if ( id[index] >= 0x30 && id[index] <= 0x39 )
+ val = id[index] - 0x30;
+
+ *fullcode += val;
+
+ // last digit is only added, not multipled.
+ if ( index < strlen(id)-1 )
+ *fullcode *= 12;
+ }
+ }
+
+ *usercode = *fullcode & 0x0000FFFF; //% 65566
+ *sitecode = (*fullcode >> 24) & 0x000000FF; // /= 16777216;
+ return 0;
+}
+
+// calc not certain - intended to get bitstream for programming / sim
+int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
+ num_to_bytebits(0x10D00000, 32, prescoBits);
+ num_to_bytebits(0x00000000, 32, prescoBits+32);
+ num_to_bytebits(0x00000000, 32, prescoBits+64);
+ num_to_bytebits(fullcode , 32, prescoBits+96);
+ return 1;
+}
+
+//see ASKDemod for what args are accepted
+int CmdPrescoDemod(const char *Cmd) {
+ if (!ASKDemod(Cmd, false, false, 1)) {
+ if (g_debugMode) PrintAndLog("ASKDemod failed");
+ return 0;
+ }
+ size_t size = DemodBufferLen;
+ //call lfdemod.c demod for Viking
+ int ans = PrescoDemod(DemodBuffer, &size);
+ if (ans < 0) {
+ if (g_debugMode) PrintAndLog("Error Presco_Demod %d", ans);
+ return 0;
+ }
+ //got a good demod
+ uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
+ uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
+ uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
+ uint32_t raw4 = bytebits_to_byte(DemodBuffer+ans+96, 32);
+ uint32_t cardid = raw4;
+ PrintAndLog("Presco Tag Found: Card ID %08X", cardid);
+ PrintAndLog("Raw: %08X%08X%08X%08X", raw1,raw2,raw3,raw4);
+ setDemodBuf(DemodBuffer+ans, 128, 0);
+
+ uint32_t sitecode = 0, usercode = 0, fullcode = 0;
+ bool Q5=false;
+ char cmd[12] = {0};
+ sprintf(cmd, "H %08X", cardid);
+ GetWiegandFromPresco(cmd, &sitecode, &usercode, &fullcode, &Q5);
+ PrintAndLog("SiteCode %u, UserCode %u, FullCode, %08X", sitecode, usercode, fullcode);
+
+ return 1;
+}
+
+//see ASKDemod for what args are accepted
+int CmdPrescoRead(const char *Cmd) {
+ // Presco Number: 123456789 --> Sitecode 30 | usercode 8665
+
+ // read lf silently
+ CmdLFRead("s");
+ // get samples silently
+ getSamples("30000",false);
+ // demod and output Presco ID
+ return CmdPrescoDemod(Cmd);
+}
+
+// takes base 12 ID converts to hex
+// Or takes 8 digit hex ID
+int CmdPrescoClone(const char *Cmd) {
+
+ bool Q5 = false;
+ uint32_t sitecode=0, usercode=0, fullcode=0;
+ uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
+
+ // get wiegand from printed number.
+ if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
+
+ if (Q5)
+ blocks[0] = T5555_MODULATION_MANCHESTER | 32<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
+
+ if ((sitecode & 0xFF) != sitecode) {
+ sitecode &= 0xFF;
+ PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
+ }
+
+ if ((usercode & 0xFFFF) != usercode) {
+ usercode &= 0xFFFF;
+ PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
+ }
+
+ blocks[1] = 0x10D00000; //preamble
+ blocks[2] = 0x00000000;
+ blocks[3] = 0x00000000;
+ blocks[4] = fullcode;
+
+ PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u, FullCode: %08x", sitecode, usercode, fullcode);
+ PrintAndLog("Blk | Data ");
+ PrintAndLog("----+------------");
+ PrintAndLog(" 00 | 0x%08x", blocks[0]);
+ PrintAndLog(" 01 | 0x%08x", blocks[1]);
+ PrintAndLog(" 02 | 0x%08x", blocks[2]);
+ PrintAndLog(" 03 | 0x%08x", blocks[3]);
+ PrintAndLog(" 04 | 0x%08x", blocks[4]);
+
+ UsbCommand resp;
+ UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
+
+ for (int i=4; i>=0; i--) {
+ c.arg[0] = blocks[i];
+ c.arg[1] = i;
+ clearCommandBuffer();
+ SendCommand(&c);
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+ PrintAndLog("Error occurred, device did not respond during write operation.");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+// takes base 12 ID converts to hex
+// Or takes 8 digit hex ID
+int CmdPrescoSim(const char *Cmd) {
+ uint32_t sitecode=0, usercode=0, fullcode=0;
+ bool Q5=false;
+ // get wiegand from printed number.
+ if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_sim();
+
+ uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
+ uint16_t arg1, arg2;
+ size_t size = 128;
+ arg1 = clk << 8 | encoding;
+ arg2 = invert << 8 | separator;
+
+ PrintAndLog("Simulating Presco - SiteCode: %u, UserCode: %u, FullCode: %08X",sitecode, usercode, fullcode);
+
+ UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
+ GetPrescoBits(fullcode, c.d.asBytes);
+ clearCommandBuffer();
+ SendCommand(&c);
+ return 0;
+}
+
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
+ {"read", CmdPrescoRead, 0, "Attempt to read and Extract tag data"},
+ {"clone", CmdPrescoClone, 0, "d <9 digit ID> or h <hex> [Q5] clone presco tag"},
+ {"sim", CmdPrescoSim, 0, "d <9 digit ID> or h <hex> simulate presco tag"},
+ {NULL, NULL, 0, NULL}
+};
+
+int CmdLFPresco(const char *Cmd) {
+ clearCommandBuffer();
+ CmdsParse(CommandTable, Cmd);
+ return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+ CmdsHelp(CommandTable);
+ return 0;
+}
--- /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.
+//-----------------------------------------------------------------------------
+// Low frequency T55xx commands
+//-----------------------------------------------------------------------------
+#ifndef CMDLFPRESCO_H__
+#define CMDLFPRESCO_H__
+
+#include <stdint.h> //uint_32+
+#include <stdbool.h> //bool
+
+int CmdLFPresco(const char *Cmd);
+int CmdPrescoClone(const char *Cmd);
+int CmdPrescoSim(const char *Cmd);
+
+int GetWiegandFromPresco(const char *id, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5);
+
+int usage_lf_presco_clone(void);
+int usage_lf_presco_sim(void);
+#endif
+
--- /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.
+//-----------------------------------------------------------------------------
+// Low frequency Farpoint / Pyramid tag commands
+//-----------------------------------------------------------------------------
+#include <string.h>
+#include <inttypes.h>
+#include "cmdlfpyramid.h"
+#include "proxmark3.h"
+#include "ui.h"
+#include "util.h"
+#include "graph.h"
+#include "cmdparser.h"
+#include "cmddata.h"
+#include "cmdmain.h"
+#include "cmdlf.h"
+#include "protocols.h" // for T55xx config register definitions
+#include "lfdemod.h" // parityTest
+#include "crc.h"
+
+static int CmdHelp(const char *Cmd);
+
+int usage_lf_pyramid_clone(void){
+ PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
+ PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated. ");
+ PrintAndLog("Currently work only on 26bit");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf pyramid clone <Facility-Code> <Card-Number>");
+ PrintAndLog("Options :");
+ PrintAndLog(" <Facility-Code> : 8-bit value facility code");
+ PrintAndLog(" <Card Number> : 16-bit value card number");
+ PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf pyramid clone 123 11223");
+ return 0;
+}
+
+int usage_lf_pyramid_sim(void) {
+ PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
+ PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
+ PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
+ PrintAndLog("Currently work only on 26bit");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf pyramid sim <Card-Number>");
+ PrintAndLog("Options :");
+ PrintAndLog(" <Facility-Code> : 8-bit value facility code");
+ PrintAndLog(" <Card Number> : 16-bit value card number");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf pyramid sim 123 11223");
+ return 0;
+}
+
+// Works for 26bits.
+int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
+
+ uint8_t pre[128];
+ memset(pre, 0x00, sizeof(pre));
+
+ // format start bit
+ pre[79] = 1;
+
+ // Get 26 wiegand from FacilityCode, CardNumber
+ uint8_t wiegand[24];
+ memset(wiegand, 0x00, sizeof(wiegand));
+ num_to_bytebits(fc, 8, wiegand);
+ num_to_bytebits(cn, 16, wiegand+8);
+
+ // add wiegand parity bits (dest, source, len)
+ wiegand_add_parity(pre+80, wiegand, 24);
+
+ // add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
+ addParity(pre+8, pyramidBits+8, 102, 8, 1);
+
+ // add checksum
+ uint8_t csBuff[13];
+ for (uint8_t i = 0; i < 13; i++)
+ csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
+
+ uint32_t crc = CRC8Maxim(csBuff, 13);
+ num_to_bytebits(crc, 8, pyramidBits+120);
+ return 1;
+}
+
+int CmdPyramidRead(const char *Cmd) {
+ CmdLFRead("s");
+ getSamples("30000",false);
+ return CmdFSKdemodPyramid("");
+}
+
+int CmdPyramidClone(const char *Cmd) {
+
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
+
+ uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
+ uint32_t blocks[5];
+ uint8_t i;
+ uint8_t bs[128];
+ memset(bs, 0x00, sizeof(bs));
+
+ if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
+
+ facilitycode = (fc & 0x000000FF);
+ cardnumber = (cn & 0x0000FFFF);
+
+ if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
+ PrintAndLog("Error with tag bitstream generation.");
+ return 1;
+ }
+
+ //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
+ blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT;
+
+ if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
+ blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
+
+ blocks[1] = bytebits_to_byte(bs,32);
+ blocks[2] = bytebits_to_byte(bs+32,32);
+ blocks[3] = bytebits_to_byte(bs+64,32);
+ blocks[4] = bytebits_to_byte(bs+96,32);
+
+ PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
+ PrintAndLog("Blk | Data ");
+ PrintAndLog("----+------------");
+ for ( i = 0; i<5; ++i )
+ PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
+
+ UsbCommand resp;
+ UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
+
+ for ( i = 0; i<5; ++i ) {
+ c.arg[0] = blocks[i];
+ c.arg[1] = i;
+ clearCommandBuffer();
+ SendCommand(&c);
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+ PrintAndLog("Error occurred, device did not respond during write operation.");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int CmdPyramidSim(const char *Cmd) {
+
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
+
+ uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
+
+ uint8_t bs[128];
+ size_t size = sizeof(bs);
+ memset(bs, 0x00, size);
+
+ // Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
+ uint64_t arg1, arg2;
+ arg1 = (10 << 8) + 8;
+ arg2 = 50 | 0;
+
+ if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
+
+ facilitycode = (fc & 0x000000FF);
+ cardnumber = (cn & 0x0000FFFF);
+
+ if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
+ PrintAndLog("Error with tag bitstream generation.");
+ return 1;
+ }
+
+ PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
+
+ UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
+ memcpy(c.d.asBytes, bs, size);
+ clearCommandBuffer();
+ SendCommand(&c);
+ return 0;
+}
+
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
+ {"read", CmdPyramidRead, 0, "Attempt to read and extract tag data"},
+ {"clone", CmdPyramidClone, 0, "<Facility-Code> <Card Number> clone pyramid tag"},
+ {"sim", CmdPyramidSim, 0, "<Facility-Code> <Card Number> simulate pyramid tag"},
+ {NULL, NULL, 0, NULL}
+};
+
+int CmdLFPyramid(const char *Cmd) {
+ clearCommandBuffer();
+ CmdsParse(CommandTable, Cmd);
+ return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+ CmdsHelp(CommandTable);
+ return 0;
+}
--- /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.
+//-----------------------------------------------------------------------------
+// Low frequency T55xx commands
+//-----------------------------------------------------------------------------
+#ifndef CMDLFPYRAMID_H__
+#define CMDLFPYRAMID_H__
+
+int CmdLFPyramid(const char *Cmd);
+int CmdPyramidClone(const char *Cmd);
+int CmdPyramidSim(const char *Cmd);
+
+int usage_lf_pyramid_clone(void);
+int usage_lf_pyramid_sim(void);
+#endif
+
return 0;\r
}\r
int usage_t55xx_write(){\r
- PrintAndLog("Usage: lf t55xx wr [b <block>] [d <data>] [p <password>] [1]");\r
+ PrintAndLog("Usage: lf t55xx wr
ite [b <block>] [d <data>] [p <password>] [1]");
\r PrintAndLog("Options:");\r
PrintAndLog(" b <block> - block number to write. Between 0-7");\r
PrintAndLog(" d <data> - 4 bytes of data to write (8 hex characters)");\r
PrintAndLog(" 1 - OPTIONAL write Page 1 instead of Page 0");\r
PrintAndLog("");\r
PrintAndLog("Examples:");\r
- PrintAndLog(" lf t55xx wr b 3 d 11223344 - write 11223344 to block 3");\r
- PrintAndLog(" lf t55xx wr b 3 d 11223344 p feedbeef - write 11223344 to block 3 password feedbeef");\r
+ PrintAndLog(" lf t55xx write b 3 d 11223344 - write 11223344 to block 3");\r
+ PrintAndLog(" lf t55xx write b 3 d 11223344 p feedbeef - write 11223344 to block 3 password feedbeef");\r
PrintAndLog("");\r
return 0;\r
}\r
void InitGraphics(int argc, char **argv);
void ExitGraphics(void);
-#define MAX_GRAPH_TRACE_LEN (1024*128)
+#define MAX_GRAPH_TRACE_LEN (40000*8)
extern int GraphBuffer[MAX_GRAPH_TRACE_LEN];
extern int GraphTraceLen;
extern double CursorScaleFactor;
//-----------------------------------------------------------------------------
#include <stdio.h>
-#include <stdint.h>
-#include <stdio.h>
+#include <stdint.h> //included in data.h
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
-#include "data.h"
+#include "data.h" //for FILE_PATH_SIZE
#ifndef ROTR
# define ROTR(x,n) (((uintmax_t)(x) >> (n)) | ((uintmax_t)(x) << ((sizeof(x) * 8) - (n))))
// by marshmellow
// takes a array of binary values, start position, length of bits per parity (includes parity bit),
-// Parity Type (1 for odd; 0 for even; 2 Always 1's), and binary Length (length to run)
+// Parity Type (1 for odd; 0 for even; 2 for Always 1's; 3 for Always 0's), and binary Length (length to run)
size_t removeParity(uint8_t *BitStream, size_t startIdx, uint8_t pLen, uint8_t pType, size_t bLen)
{
uint32_t parityWd = 0;
}
j--; // overwrite parity with next data
// if parity fails then return 0
- if (pType == 2) { // then marker bit which should be a 1
- if (!BitStream[j]) return 0;
- } else {
- if (parityTest(parityWd, pLen, pType) == 0) return 0;
+ switch (pType) {
+ case 3: if (BitStream[j]==1) return 0; break; //should be 0 spacer bit
+ case 2: if (BitStream[j]==0) return 0; break; //should be 1 spacer bit
+ default: //test parity
+ if (parityTest(parityWd, pLen, pType) == 0) return 0; break;
}
bitCnt+=(pLen-1);
parityWd = 0;
// by marshmellow
// takes a array of binary values, length of bits per parity (includes parity bit),
-// Parity Type (1 for odd; 0 for even; 2 Always 1's), and binary Length (length to run)
+// Parity Type (1 for odd; 0 for even; 2 Always 1's; 3 Always 0's), and binary Length (length to run)
+// Make sure *dest is long enough to store original sourceLen + #_of_parities_to_be_added
size_t addParity(uint8_t *BitSource, uint8_t *dest, uint8_t sourceLen, uint8_t pLen, uint8_t pType)
{
uint32_t parityWd = 0;
dest[j++] = (BitSource[word+bit]);
}
// if parity fails then return 0
- if (pType == 2) { // then marker bit which should be a 1
- dest[j++]=1;
- } else {
- dest[j++] = parityTest(parityWd, pLen-1, pType) ^ 1;
+ switch (pType) {
+ case 3: dest[j++]=0; break; // marker bit which should be a 0
+ case 2: dest[j++]=1; break; // marker bit which should be a 1
+ default:
+ dest[j++] = parityTest(parityWd, pLen-1, pType) ^ 1;
+ break;
}
bitCnt += pLen;
parityWd = 0;
{
for(size_t i = 1; i<size; i++){
if (BitStream[i]-BitStream[i-1]>=30) //large jump up
- BitStream[i]=127;
+ BitStream[i]=255;
else if(BitStream[i]-BitStream[i-1]<=-20) //large jump down
- BitStream[i]=-127;
+ BitStream[i]=0;
}
return;
}
//return start position
return (int) startIdx;
}
- return -5;
+ return -5; //spacer bits not found - not a valid gproxII
}
-//translate wave to 11111100000 (1 for each short wave 0 for each long wave)
+//translate wave to 11111100000 (1 for each short wave [higher freq] 0 for each long wave [lower freq])
size_t fsk_wave_demod(uint8_t * dest, size_t size, uint8_t fchigh, uint8_t fclow)
{
size_t last_transition = 0;
// count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
// or 10 (fc/10) cycles but in practice due to noise etc we may end up with anywhere
// between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
+ // (could also be fc/5 && fc/7 for fsk1 = 4-9)
for(idx = 161; idx < size-20; idx++) {
// threshold current value
else dest[idx] = 1;
// Check for 0->1 transition
- if (dest[idx-1] < dest[idx]) { // 0 -> 1 transition
+ if (dest[idx-1] < dest[idx]) {
preLastSample = LastSample;
LastSample = currSample;
currSample = idx-last_transition;
- if (currSample < (fclow-2)){ //0-5 = garbage noise (or 0-3)
+ if (currSample < (fclow-2)) { //0-5 = garbage noise (or 0-3)
//do nothing with extra garbage
- } else if (currSample < (fchigh-1)) { //6-8 = 8 sample waves or 3-6 = 5
+ } else if (currSample < (fchigh-1)) { //6-8 = 8 sample waves (or 3-6 = 5)
+ //correct previous 9 wave surrounded by 8 waves (or 6 surrounded by 5)
if (LastSample > (fchigh-2) && (preLastSample < (fchigh-1) || preLastSample == 0 )){
- dest[numBits-1]=1; //correct previous 9 wave surrounded by 8 waves
+ dest[numBits-1]=1;
}
dest[numBits++]=1;
- } else if (currSample > (fchigh) && !numBits) { //12 + and first bit = garbage
+ } else if (currSample > (fchigh) && !numBits) { //12 + and first bit = unusable garbage
//do nothing with beginning garbage
- } else if (currSample == (fclow+1) && LastSample == (fclow-1)) { // had a 7 then a 9 should be two 8's
+ } else if (currSample == (fclow+1) && LastSample == (fclow-1)) { // had a 7 then a 9 should be two 8's (or 4 then a 6 should be two 5's)
dest[numBits++]=1;
- } else { //9+ = 10 sample waves
+ } else { //9+ = 10 sample waves (or 6+ = 7)
dest[numBits++]=0;
}
last_transition = idx;
}
//translate 11111100000 to 10
+//rfLen = clock, fchigh = larger field clock, fclow = smaller field clock
size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen,
uint8_t invert, uint8_t fchigh, uint8_t fclow)
{
uint32_t n=1;
for( idx=1; idx < size; idx++) {
n++;
- if (dest[idx]==lastval) continue;
+ if (dest[idx]==lastval) continue; //skip until we hit a transition
+ //find out how many bits (n) we collected
//if lastval was 1, we have a 1->0 crossing
if (dest[idx-1]==1) {
n = (n * fclow + rfLen/2) / rfLen;
}
if (n == 0) n = 1;
+ //add to our destination the bits we collected
memset(dest+numBits, dest[idx-1]^invert , n);
numBits += n;
n=0;
return (int) startIdx;
}
+// find presco preamble 0x10D in already demoded data
+int PrescoDemod(uint8_t *dest, size_t *size) {
+ //make sure buffer has data
+ if (*size < 64*2) return -2;
+
+ size_t startIdx = 0;
+ uint8_t preamble[] = {1,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0};
+ uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
+ if (errChk == 0) return -4; //preamble not found
+ //return start position
+ return (int) startIdx;
+}
+
// Ask/Biphase Demod then try to locate an ISO 11784/85 ID
// BitStream must contain previously askrawdemod and biphasedemoded data
int FDXBdemodBI(uint8_t *dest, size_t *size)
numBits += (firstFullWave / *clock);
//set start of wave as clock align
lastClkBit = firstFullWave;
- //PrintAndLog("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
- //PrintAndLog("DEBUG: clk: %d, lastClkBit: %d", *clock, lastClkBit);
+ if (g_debugMode==2) prnt("DEBUG PSK: firstFullWave: %u, waveLen: %u",firstFullWave,fullWaveLen);
+ if (g_debugMode==2) prnt("DEBUG: clk: %d, lastClkBit: %u, fc: %u", *clock, lastClkBit,(unsigned int) fc);
waveStart = 0;
dest[numBits++] = curPhase; //set first read bit
for (i = firstFullWave + fullWaveLen - 1; i < *size-3; i++){
i=0;
// warning - overwriting buffer given with raw wave data with ST removed...
while ( dataloc < bufsize-(clk/2) ) {
- //compensate for long high at end of ST not being high... (we cut out the high part)
+ //compensate for long high at end of ST not being high due to signal loss... (and we cut out the start of wave high part)
if (buffer[dataloc]<high && buffer[dataloc]>low && buffer[dataloc+3]<high && buffer[dataloc+3]>low) {
for(i=0; i < clk/2-tol; ++i) {
buffer[dataloc+i] = high+5;
}
}
newloc += i;
- //skip next ST
+ //skip next ST - we just assume it will be there from now on...
dataloc += clk*4;
}
*size = newloc;
#ifndef LFDEMOD_H__
#define LFDEMOD_H__
-#include <stdint.h>
-#include "common.h" //for bool
+#include <stdint.h> // for uint_32+
+#include <stdbool.h> // for bool
//generic
size_t addParity(uint8_t *BitSource, uint8_t *dest, uint8_t sourceLen, uint8_t pLen, uint8_t pType);
int ParadoxdemodFSK(uint8_t *dest, size_t *size, uint32_t *hi2, uint32_t *hi, uint32_t *lo);
int PyramiddemodFSK(uint8_t *dest, size_t *size);
int VikingDemod_AM(uint8_t *dest, size_t *size);
-
+int PrescoDemod(uint8_t *dest, size_t *size);
#endif
#ifndef MAX
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif
+#ifndef ABS
+# define ABS(a) ( ((a)<0) ? -(a) : (a) )
+#endif
+
#define RAMFUNC __attribute((long_call, section(".ramfunc")))
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