// Data and Graph commands
//-----------------------------------------------------------------------------
+#include "cmddata.h"
+
#include <stdio.h> // also included in util.h
#include <string.h> // also included in util.h
#include <inttypes.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 "proxmark3.h"
+#include "comms.h"
#include "ui.h" // for show graph controls
#include "graph.h" // for graph data
#include "cmdparser.h"// already included in cmdmain.h
//by marshmellow
void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
{
- if (buff == NULL)
+ if (buff == NULL)
return;
if ( size > MAX_DEMOD_BUF_LEN - startIdx)
PrintAndLog(" x output in hex (omit for binary output)");
PrintAndLog(" o <offset> enter offset in # of bits");
PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
- return 0;
+ return 0;
}
//by marshmellow
}
//Validations
if(errors) return usage_data_printdemodbuf();
- length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
+ length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
if (hexMode){
numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
numBits = binarraytohex(hex, buf, numBits);
if (numBits==0) return 0;
- PrintAndLog("DemodBuffer: %s",hex);
+ PrintAndLog("DemodBuffer: %s",hex);
} else {
PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
}
// (amp may not be needed anymore)
//verbose will print results and demoding messages
//emSearch will auto search for EM410x format in bitstream
-//askType switches decode: ask/raw = 0, ask/manchester = 1
+//askType switches decode: ask/raw = 0, ask/manchester = 1
int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
int invert=0;
int clk=0;
int foundclk = 0;
//amp before ST check
if (amp == 'a' || amp == 'A') {
- askAmp(BitStream, BitLen);
+ askAmp(BitStream, BitLen);
}
bool st = false;
size_t ststart = 0, stend = 0;
else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
-
+
}
uint64_t lo = 0;
uint32_t hi = 0;
return 0;
}
bool st = true;
- if (Cmd[0]=='s')
+ if (Cmd[0]=='s')
return ASKDemod_ext(Cmd++, true, false, 1, &st);
else if (Cmd[1] == 's')
return ASKDemod_ext(Cmd+=2, true, false, 1, &st);
PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
- PrintAndLog(" [invert] invert output");
- PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
+ PrintAndLog(" [invert] invert output");
+ PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
PrintAndLog("");
PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
return 0;
return 1;
}
-//by marshmellow
-//biphase decode
-//take 01 or 10 = 0 and 11 or 00 = 1
-//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
-// and "invert" default = 0 if 1 it will invert output
-// the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
+/**
+ * @author marshmellow
+ * biphase decode
+ * decdoes 01 or 10 to 0 and 11 or 00 to 1
+ * param offset adjust start position
+ * param invert invert output
+ * param maxErr maximum tolerated errors
+ */
int CmdBiphaseDecodeRaw(const char *Cmd)
{
size_t size=0;
int offset=0, invert=0, maxErr=20, errCnt=0;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 7 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
-
+
if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2);
return 1;
int ASKbiphaseDemod(const char *Cmd, bool verbose)
{
//ask raw demod GraphBuffer first
- int offset=0, clk=0, invert=0, maxErr=0;
+ int offset=0, clk=0, invert=0, maxErr=100;
sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
size_t size = getFromGraphBuf(BitStream);
int startIdx = 0;
//invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
- int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);
- if ( errCnt < 0 || errCnt > maxErr ) {
- if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
- return 0;
+ int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);
+ if ( errCnt < 0 || errCnt > maxErr ) {
+ if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
+ return 0;
}
//attempt to Biphase decode BitStream
if (SaveGrph) {
//GraphTraceLen = GraphTraceLen - window;
memcpy(out, CorrelBuffer, len * sizeof(int));
- RepaintGraphWindow();
+ RepaintGraphWindow();
}
return Correlation;
}
int CmdAutoCorr(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
- if (cmdp == 'h' || cmdp == 'H')
+ if (cmdp == 'h' || cmdp == 'H')
return usage_data_autocorr();
int window = 4000; //set default
char grph=0;
int cnt = 0;
uint8_t got[12288];
- GetFromBigBuf(got,sizeof(got),0);
- WaitForResponse(CMD_ACK,NULL);
+ GetFromBigBuf(got, sizeof(got), 0 , NULL, -1, false);
for (int j = 0; j < sizeof(got); j++) {
for (int k = 0; k < 8; k++) {
int shiftedVal=0;
for(int i = 0; i<GraphTraceLen; i++){
shiftedVal=GraphBuffer[i]+shift;
- if (shiftedVal>127)
+ if (shiftedVal>127)
shiftedVal=127;
- else if (shiftedVal<-127)
+ else if (shiftedVal<-127)
shiftedVal=-127;
GraphBuffer[i]= shiftedVal;
}
//by marshmellow
//use large jumps in read samples to identify edges of waves and then amplify that wave to max
-//similar to dirtheshold, threshold commands
+//similar to dirtheshold, threshold commands
//takes a threshold length which is the measured length between two samples then determines an edge
int CmdAskEdgeDetect(const char *Cmd)
{
int thresLen = 25;
int ans = 0;
- sscanf(Cmd, "%i", &thresLen);
+ sscanf(Cmd, "%i", &thresLen);
ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
RepaintGraphWindow();
setDemodBuf(BitStream,size,0);
setClockGrid(rfLen, startIdx);
- // Now output the bitstream to the scrollback by line of 16 bits
+ // Now output the bitstream to the scrollback by line of 16 bits
if (verbose || g_debugMode) {
PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
PrintAndLog("");
PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
- PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
+ PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
if (errCnt > maxErr){
if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
- }
+ }
if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
if (errCnt > maxErr){
if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
- }
+ }
if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
}
- return 1;
+ return 1;
}
int CmdNRZrawDemod(const char *Cmd)
ans = PSKDemod(Cmd, true);
//output
if (!ans){
- if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
+ if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
return 0;
}
-
+
PrintAndLog("PSK1 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
}
ans=PSKDemod(Cmd, true);
if (!ans){
- if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
+ if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
return 0;
- }
+ }
psk1TOpsk2(DemodBuffer, DemodBufferLen);
PrintAndLog("PSK2 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
- printDemodBuff();
+ printDemodBuff();
return 1;
}
if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
- PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
+ PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
- PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
- PrintAndLog(" <options> see specific modulation help for optional parameters");
+ PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
+ PrintAndLog(" <options> see specific modulation help for optional parameters");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
ans = CmdPSK1rawDemod(Cmd+2);
} else if(cmdp == 'p' && cmdp2 == '2'){
ans = CmdPSK2rawDemod(Cmd+2);
- } else {
+ } else {
PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
}
return ans;
return 0;
}
- GetFromBigBuf(got,requested,offset);
- WaitForResponse(CMD_ACK,NULL);
+ GetFromBigBuf(got, requested, offset, NULL, -1, false);
i = 0;
for (j = 0; j < requested; j++) {
n = sizeof(got);
if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
- GetFromBigBuf(got,n,0);
- if (!silent) PrintAndLog("Data fetched");
UsbCommand response;
- WaitForResponse(CMD_ACK, &response);
+ GetFromBigBuf(got, n, 0, &response, -1, false);
+ if (!silent) PrintAndLog("Data fetched");
uint8_t bits_per_sample = 8;
//Old devices without this feature would send 0 at arg[0]
- if(response.arg[0] > 0)
- {
+ if(response.arg[0] > 0) {
+ #pragma GCC diagnostic push
+ #pragma GCC diagnostic ignored "-Waddress-of-packed-member"
sample_config *sc = (sample_config *) response.d.asBytes;
+ #pragma GCC diagnostic pop
if (!silent) 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)
{
if (!silent) PrintAndLog("Unpacking...");
}
setClockGrid(0,0);
+ DemodBufferLen = 0;
RepaintGraphWindow();
return 0;
}
peakf = resp.arg[2] & 0xffff;
peakv = resp.arg[2] >> 16;
PrintAndLog("");
- PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
- PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
- PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
- PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
-
- #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
- #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
- #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
- #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
-
- if (peakv < LF_UNUSABLE_V)
- PrintAndLog("# Your LF antenna is unusable.");
- else if (peakv < LF_MARGINAL_V)
- PrintAndLog("# Your LF antenna is marginal.");
- if (vHf < HF_UNUSABLE_V)
- PrintAndLog("# Your HF antenna is unusable.");
- else if (vHf < HF_MARGINAL_V)
- PrintAndLog("# Your HF antenna is marginal.");
-
- if (peakv >= LF_UNUSABLE_V) {
+ if (arg & FLAG_TUNE_LF)
+ {
+ PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/500.0);
+ PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/500.0);
+ PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/500.0, 12000.0/(peakf+1));
+ }
+ if (arg & FLAG_TUNE_HF)
+ PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
+
+ #define LF_UNUSABLE_V 3000
+ #define LF_MARGINAL_V 15000
+ #define HF_UNUSABLE_V 3200
+ #define HF_MARGINAL_V 8000
+
+ if (arg & FLAG_TUNE_LF)
+ {
+ if (peakv<<1 < LF_UNUSABLE_V)
+ PrintAndLog("# Your LF antenna is unusable.");
+ else if (peakv<<1 < LF_MARGINAL_V)
+ PrintAndLog("# Your LF antenna is marginal.");
+ }
+ if (arg & FLAG_TUNE_HF)
+ {
+ if (vHf < HF_UNUSABLE_V)
+ PrintAndLog("# Your HF antenna is unusable.");
+ else if (vHf < HF_MARGINAL_V)
+ PrintAndLog("# Your HF antenna is marginal.");
+ }
+
+ if (peakv<<1 >= LF_UNUSABLE_V) {
for (int i = 0; i < 256; i++) {
GraphBuffer[i] = resp.d.asBytes[i] - 128;
}
len = strlen(Cmd);
if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
memcpy(filename, Cmd, len);
-
+
FILE *f = fopen(filename, "r");
if (!f) {
PrintAndLog("couldn't open '%s'", filename);
fclose(f);
PrintAndLog("loaded %d samples", GraphTraceLen);
setClockGrid(0,0);
+ DemodBufferLen = 0;
RepaintGraphWindow();
return 0;
}
if (max != min) {
for (i = 0; i < GraphTraceLen; ++i) {
- GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
- (max - min);
+ GraphBuffer[i] = ((long)(GraphBuffer[i] - ((max + min) / 2)) * 256) / (max - min);
//marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
}
}
len = strlen(Cmd);
if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
memcpy(filename, Cmd, len);
-
+
FILE *f = fopen(filename, "w");
if(!f) {
return 0;
}
+ /* // example of FSK2 RF/50 Tones
+ static const int LowTone[] = {
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
+ };
+ static const int HighTone[] = {
+ 1, 1, 1, 1, 1, -1, -1, -1, -1, // note one extra 1 to padd due to 50/8 remainder (1/2 the remainder)
+ 1, 1, 1, 1, -1, -1, -1, -1,
+ 1, 1, 1, 1, -1, -1, -1, -1,
+ 1, 1, 1, 1, -1, -1, -1, -1,
+ 1, 1, 1, 1, -1, -1, -1, -1,
+ 1, 1, 1, 1, -1, -1, -1, -1, -1, // note one extra -1 to padd due to 50/8 remainder
+ };
+ */
+void GetHiLoTone(int *LowTone, int *HighTone, int clk, int LowToneFC, int HighToneFC) {
+ int i,j=0;
+ int Left_Modifier = ((clk % LowToneFC) % 2) + ((clk % LowToneFC)/2);
+ int Right_Modifier = (clk % LowToneFC) / 2;
+ //int HighToneMod = clk mod HighToneFC;
+ int LeftHalfFCCnt = (LowToneFC % 2) + (LowToneFC/2); //truncate
+ int FCs_per_clk = clk/LowToneFC;
+
+ // need to correctly split up the clock to field clocks.
+ // First attempt uses modifiers on each end to make up for when FCs don't evenly divide into Clk
+
+ // start with LowTone
+ // set extra 1 modifiers to make up for when FC doesn't divide evenly into Clk
+ for (i = 0; i < Left_Modifier; i++) {
+ LowTone[i] = 1;
+ }
+
+ // loop # of field clocks inside the main clock
+ for (i = 0; i < (FCs_per_clk); i++) {
+ // loop # of samples per field clock
+ for (j = 0; j < LowToneFC; j++) {
+ LowTone[(i*LowToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
+ }
+ }
+
+ int k;
+ // add last -1 modifiers
+ for (k = 0; k < Right_Modifier; k++) {
+ LowTone[((i-1)*LowToneFC)+Left_Modifier+j+k] = -1;
+ }
+
+ // now do hightone
+ Left_Modifier = ((clk % HighToneFC) % 2) + ((clk % HighToneFC)/2);
+ Right_Modifier = (clk % HighToneFC) / 2;
+ LeftHalfFCCnt = (HighToneFC % 2) + (HighToneFC/2); //truncate
+ FCs_per_clk = clk/HighToneFC;
+
+ for (i = 0; i < Left_Modifier; i++) {
+ HighTone[i] = 1;
+ }
+
+ // loop # of field clocks inside the main clock
+ for (i = 0; i < (FCs_per_clk); i++) {
+ // loop # of samples per field clock
+ for (j = 0; j < HighToneFC; j++) {
+ HighTone[(i*HighToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
+ }
+ }
+
+ // add last -1 modifiers
+ for (k = 0; k < Right_Modifier; k++) {
+ PrintAndLog("(i-1)*HighToneFC+lm+j+k %i",((i-1)*HighToneFC)+Left_Modifier+j+k);
+ HighTone[((i-1)*HighToneFC)+Left_Modifier+j+k] = -1;
+ }
+ if (g_debugMode == 2) {
+ for ( i = 0; i < clk; i++) {
+ PrintAndLog("Low: %i, High: %i",LowTone[i],HighTone[i]);
+ }
+ }
+}
+
+//old CmdFSKdemod adapted by marshmellow
+//converts FSK to clear NRZ style wave. (or demodulates)
+int FSKToNRZ(int *data, int *dataLen, int clk, int LowToneFC, int HighToneFC) {
+ uint8_t ans=0;
+ if (clk == 0 || LowToneFC == 0 || HighToneFC == 0) {
+ int firstClockEdge=0;
+ ans = fskClocks((uint8_t *) &LowToneFC, (uint8_t *) &HighToneFC, (uint8_t *) &clk, false, &firstClockEdge);
+ if (g_debugMode > 1) {
+ PrintAndLog ("DEBUG FSKtoNRZ: detected clocks: fc_low %i, fc_high %i, clk %i, firstClockEdge %i, ans %u", LowToneFC, HighToneFC, clk, firstClockEdge, ans);
+ }
+ }
+ // currently only know fsk modulations with field clocks < 10 samples and > 4 samples. filter out to remove false positives (and possibly destroying ask/psk modulated waves...)
+ if (ans == 0 || clk == 0 || LowToneFC == 0 || HighToneFC == 0 || LowToneFC > 10 || HighToneFC < 4) {
+ if (g_debugMode > 1) {
+ PrintAndLog ("DEBUG FSKtoNRZ: no fsk clocks found");
+ }
+ return 0;
+ }
+ int LowTone[clk];
+ int HighTone[clk];
+ GetHiLoTone(LowTone, HighTone, clk, LowToneFC, HighToneFC);
+
+ int i, j;
+
+ // loop through ([all samples] - clk)
+ for (i = 0; i < *dataLen - clk; ++i) {
+ int lowSum = 0, highSum = 0;
+
+ // sum all samples together starting from this sample for [clk] samples for each tone (multiply tone value with sample data)
+ for (j = 0; j < clk; ++j) {
+ lowSum += LowTone[j] * data[i+j];
+ highSum += HighTone[j] * data[i + j];
+ }
+ // get abs( [average sample value per clk] * 100 ) (or a rolling average of sorts)
+ lowSum = abs(100 * lowSum / clk);
+ highSum = abs(100 * highSum / clk);
+ // save these back to buffer for later use
+ data[i] = (highSum << 16) | lowSum;
+ }
+
+ // now we have the abs( [average sample value per clk] * 100 ) for each tone
+ // loop through again [all samples] - clk - 16
+ // note why 16??? is 16 the largest FC? changed to LowToneFC as that should be the > fc
+ for(i = 0; i < *dataLen - clk - LowToneFC; ++i) {
+ int lowTot = 0, highTot = 0;
+
+ // sum a field clock width of abs( [average sample values per clk] * 100) for each tone
+ for (j = 0; j < LowToneFC; ++j) { //10 for fsk2
+ lowTot += (data[i + j] & 0xffff);
+ }
+ for (j = 0; j < HighToneFC; j++) { //8 for fsk2
+ highTot += (data[i + j] >> 16);
+ }
+
+ // subtract the sum of lowTone averages by the sum of highTone averages as it
+ // and write back the new graph value
+ data[i] = lowTot - highTot;
+ }
+ // update dataLen to what we put back to the data sample buffer
+ *dataLen -= (clk + LowToneFC);
+ return 0;
+}
+
+int usage_data_fsktonrz() {
+ PrintAndLog("Usage: data fsktonrz c <clock> l <fc_low> f <fc_high>");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog(" c <clock> enter the a clock (omit to autodetect)");
+ PrintAndLog(" l <fc_low> enter a field clock (omit to autodetect)");
+ PrintAndLog(" f <fc_high> enter a field clock (omit to autodetect)");
+ return 0;
+}
+
+int CmdFSKToNRZ(const char *Cmd) {
+ // take clk, fc_low, fc_high
+ // blank = auto;
+ bool errors = false;
+ int clk = 0;
+ char cmdp = 0;
+ int fc_low = 10, fc_high = 8;
+ while(param_getchar(Cmd, cmdp) != 0x00)
+ {
+ switch(param_getchar(Cmd, cmdp))
+ {
+ case 'h':
+ case 'H':
+ return usage_data_fsktonrz();
+ case 'C':
+ case 'c':
+ clk = param_get32ex(Cmd, cmdp+1, 0, 10);
+ cmdp += 2;
+ break;
+ case 'F':
+ case 'f':
+ fc_high = param_get32ex(Cmd, cmdp+1, 0, 10);
+ cmdp += 2;
+ break;
+ case 'L':
+ case 'l':
+ fc_low = param_get32ex(Cmd, cmdp+1, 0, 10);
+ cmdp += 2;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = true;
+ break;
+ }
+ if(errors) break;
+ }
+ //Validations
+ if(errors) return usage_data_fsktonrz();
+
+ setClockGrid(0,0);
+ DemodBufferLen = 0;
+ int ans = FSKToNRZ(GraphBuffer, &GraphTraceLen, clk, fc_low, fc_high);
+ CmdNorm("");
+ RepaintGraphWindow();
+ return ans;
+}
+
+
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
{"dec", CmdDec, 1, "Decimate samples"},
{"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
+ {"fsktonrz", CmdFSKToNRZ, 1, "Convert fsk2 to nrz wave for alternate fsk demodulating (for weak fsk)"},
{"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
{"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
{"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
{"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
{"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
{"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
- {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
+ {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
{"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
{"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
{"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
projects / proxmark3-svn / blobdiff