// 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 <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 "cmddata.h"
-#include "lfdemod.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 "loclass/cipherutils.h" // for decimating samples in getsamples
+#include "cmdlfem4x.h"// for em410x demod
+
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
-int DemodBufferLen;
+uint8_t g_debugMode=0;
+size_t DemodBufferLen=0;
+int g_DemodStartIdx=0;
+int g_DemodClock=0;
+
static int CmdHelp(const char *Cmd);
//set the demod buffer with given array of binary (one bit per byte)
//by marshmellow
-void setDemodBuf(uint8_t *buff,int size)
+void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
{
- int i=0;
- for (; i < size; ++i){
- DemodBuffer[i]=buff[i];
+ if (buff == NULL)
+ return;
+
+ if ( size > MAX_DEMOD_BUF_LEN - startIdx)
+ size = MAX_DEMOD_BUF_LEN - startIdx;
+
+ size_t i = 0;
+ for (; i < size; i++){
+ DemodBuffer[i]=buff[startIdx++];
}
DemodBufferLen=size;
return;
}
-//by marshmellow
-void printDemodBuff()
-{
- uint32_t i = 0;
- int bitLen = DemodBufferLen;
- if (bitLen<16) {
- PrintAndLog("no bits found in demod buffer");
- return;
- }
- if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
- for (i = 0; i <= (bitLen-16); i+=16) {
- PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
- DemodBuffer[i],
- DemodBuffer[i+1],
- DemodBuffer[i+2],
- DemodBuffer[i+3],
- DemodBuffer[i+4],
- DemodBuffer[i+5],
- DemodBuffer[i+6],
- DemodBuffer[i+7],
- DemodBuffer[i+8],
- DemodBuffer[i+9],
- DemodBuffer[i+10],
- DemodBuffer[i+11],
- DemodBuffer[i+12],
- DemodBuffer[i+13],
- DemodBuffer[i+14],
- DemodBuffer[i+15]);
- }
- return;
-}
+bool getDemodBuf(uint8_t *buff, size_t *size) {
+ if (buff == NULL) return false;
+ if (size == NULL) return false;
+ if (*size == 0) return false;
+ *size = (*size > DemodBufferLen) ? DemodBufferLen : *size;
-int CmdAmp(const char *Cmd)
-{
- int i, rising, falling;
- int max = INT_MIN, min = INT_MAX;
-
- for (i = 10; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i] > max)
- max = GraphBuffer[i];
- if (GraphBuffer[i] < min)
- min = GraphBuffer[i];
- }
+ memcpy(buff, DemodBuffer, *size);
+ return true;
+}
- if (max != min) {
- rising = falling= 0;
- for (i = 0; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i + 1] < GraphBuffer[i]) {
- if (rising) {
- GraphBuffer[i] = max;
- rising = 0;
- }
- falling = 1;
- }
- if (GraphBuffer[i + 1] > GraphBuffer[i]) {
- if (falling) {
- GraphBuffer[i] = min;
- falling = 0;
- }
- rising= 1;
- }
- }
+// option '1' to save DemodBuffer any other to restore
+void save_restoreDB(uint8_t saveOpt)
+{
+ static uint8_t SavedDB[MAX_DEMOD_BUF_LEN];
+ static size_t SavedDBlen;
+ static bool DB_Saved = false;
+ static int savedDemodStartIdx = 0;
+ static int savedDemodClock = 0;
+
+ if (saveOpt == GRAPH_SAVE) { //save
+
+ memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
+ SavedDBlen = DemodBufferLen;
+ DB_Saved=true;
+ savedDemodStartIdx = g_DemodStartIdx;
+ savedDemodClock = g_DemodClock;
+ } else if (DB_Saved) { //restore
+ memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
+ DemodBufferLen = SavedDBlen;
+ g_DemodClock = savedDemodClock;
+ g_DemodStartIdx = savedDemodStartIdx;
}
- RepaintGraphWindow();
- return 0;
+ return;
}
-/*
- * Generic command to demodulate ASK.
- *
- * Argument is convention: positive or negative (High mod means zero
- * or high mod means one)
- *
- * Updates the Graph trace with 0/1 values
- *
- * Arguments:
- * c : 0 or 1
- */
- //this method is dependant on all highs and lows to be the same(or clipped) this creates issues[marshmellow] it also ignores the clock
-int Cmdaskdemod(const char *Cmd)
+int CmdSetDebugMode(const char *Cmd)
{
- int i;
- int c, high = 0, low = 0;
-
- // TODO: complain if we do not give 2 arguments here !
- // (AL - this doesn't make sense! we're only using one argument!!!)
- sscanf(Cmd, "%i", &c);
+ int demod=0;
+ sscanf(Cmd, "%i", &demod);
+ g_debugMode=(uint8_t)demod;
+ return 1;
+}
- /* Detect high and lows and clock */
- // (AL - clock???)
- for (i = 0; i < GraphTraceLen; ++i)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
- high=abs(high*.75);
- low=abs(low*.75);
- if (c != 0 && c != 1) {
- PrintAndLog("Invalid argument: %s", Cmd);
- return 0;
- }
- //prime loop
- if (GraphBuffer[0] > 0) {
- GraphBuffer[0] = 1-c;
- } else {
- GraphBuffer[0] = c;
- }
- for (i = 1; i < GraphTraceLen; ++i) {
- /* Transitions are detected at each peak
- * Transitions are either:
- * - we're low: transition if we hit a high
- * - we're high: transition if we hit a low
- * (we need to do it this way because some tags keep high or
- * low for long periods, others just reach the peak and go
- * down)
- */
- //[marhsmellow] change == to >= for high and <= for low for fuzz
- if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) {
- GraphBuffer[i] = 1 - c;
- } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){
- GraphBuffer[i] = c;
- } else {
- /* No transition */
- GraphBuffer[i] = GraphBuffer[i - 1];
- }
- }
- RepaintGraphWindow();
- return 0;
+int usage_data_printdemodbuf(){
+ PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ 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;
}
//by marshmellow
-void printBitStream(uint8_t BitStream[], uint32_t bitLen)
+void printDemodBuff(void)
{
- uint32_t i = 0;
- if (bitLen<16) {
- PrintAndLog("Too few bits found: %d",bitLen);
+ int bitLen = DemodBufferLen;
+ if (bitLen<1) {
+ PrintAndLog("no bits found in demod buffer");
return;
}
- if (bitLen>512) bitLen=512;
- for (i = 0; i <= (bitLen-16); i+=16) {
- PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
- BitStream[i],
- BitStream[i+1],
- BitStream[i+2],
- BitStream[i+3],
- BitStream[i+4],
- BitStream[i+5],
- BitStream[i+6],
- BitStream[i+7],
- BitStream[i+8],
- BitStream[i+9],
- BitStream[i+10],
- BitStream[i+11],
- BitStream[i+12],
- BitStream[i+13],
- BitStream[i+14],
- BitStream[i+15]);
- }
+ if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
+
+ char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
+ PrintAndLog("%s",bin);
+
return;
}
-//by marshmellow
-//print EM410x ID in multiple formats
-void printEM410x(uint64_t id)
+
+int CmdPrintDemodBuff(const char *Cmd)
{
- if (id !=0){
- uint64_t iii=1;
- uint64_t id2lo=0; //id2hi=0,
- uint32_t ii=0;
- uint32_t i=0;
- for (ii=5; ii>0;ii--){
- for (i=0;i<8;i++){
- id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
- }
- }
- //output em id
- PrintAndLog("EM TAG ID : %010llx", id);
- PrintAndLog("Unique TAG ID: %010llx", id2lo); //id2hi,
- PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
- PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFF);
- PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
- PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
- PrintAndLog("DEZ 14/IK2 : %014lld",id);
- PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
- PrintAndLog("Other : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
+ char hex[512]={0x00};
+ bool hexMode = false;
+ bool errors = false;
+ uint32_t offset = 0; //could be size_t but no param_get16...
+ uint32_t length = 512;
+ char cmdp = 0;
+ while(param_getchar(Cmd, cmdp) != 0x00)
+ {
+ switch(param_getchar(Cmd, cmdp))
+ {
+ case 'h':
+ case 'H':
+ return usage_data_printdemodbuf();
+ case 'x':
+ case 'X':
+ hexMode = true;
+ cmdp++;
+ break;
+ case 'o':
+ case 'O':
+ offset = param_get32ex(Cmd, cmdp+1, 0, 10);
+ if (!offset) errors = true;
+ cmdp += 2;
+ break;
+ case 'l':
+ case 'L':
+ length = param_get32ex(Cmd, cmdp+1, 512, 10);
+ if (!length) errors = true;
+ cmdp += 2;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = true;
+ break;
}
- return;
+ if(errors) break;
+ }
+ //Validations
+ if(errors) return usage_data_printdemodbuf();
+ length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
+ int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
+
+ if (hexMode){
+ char *buf = (char *) (DemodBuffer + offset);
+ numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
+ numBits = binarraytohex(hex, buf, numBits);
+ if (numBits==0) return 0;
+ PrintAndLog("DemodBuffer: %s",hex);
+ } else {
+ PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
+ }
+ return 1;
}
//by marshmellow
-//take binary from demod buffer and see if we can find an EM410x ID
-int CmdEm410xDecode(const char *Cmd)
+//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
+int CmdGetBitStream(const char *Cmd)
{
- uint64_t id=0;
- // uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- // uint32_t i=0;
- // i=getFromGraphBuf(BitStream);
- id = Em410xDecode(DemodBuffer,DemodBufferLen);
- printEM410x(id);
- if (id>0) return 1;
+ int i;
+ CmdHpf(Cmd);
+ for (i = 0; i < GraphTraceLen; i++) {
+ if (GraphBuffer[i] >= 1) {
+ GraphBuffer[i] = 1;
+ } else {
+ GraphBuffer[i] = 0;
+ }
+ }
+ RepaintGraphWindow();
return 0;
}
-
//by marshmellow
-//takes 2 arguments - clock and invert both as integers
-//attempts to demodulate ask while decoding manchester
-//prints binary found and saves in graphbuffer for further commands
-int Cmdaskmandemod(const char *Cmd)
-{
+//Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
+// (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
+int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
int invert=0;
int clk=0;
+ int maxErr=100;
+ int maxLen=0;
+ uint8_t askamp = 0;
+ char amp = param_getchar(Cmd, 0);
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- sscanf(Cmd, "%i %i", &clk, &invert);
+ sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &);
+ if (!maxLen) maxLen = BIGBUF_SIZE;
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
-
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
size_t BitLen = getFromGraphBuf(BitStream);
- // PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
- int errCnt=0;
- errCnt = askmandemod(BitStream, &BitLen,&clk,&invert);
- if (errCnt<0||BitLen<16){ //if fatal error (or -1)
- // PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
+ if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
+ if (BitLen < 255) return 0;
+ if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
+ int foundclk = 0;
+ //amp before ST check
+ if (amp == 'a' || amp == 'A') {
+ askAmp(BitStream, BitLen);
+ }
+ bool st = false;
+ size_t ststart = 0, stend = 0;
+ if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend);
+ *stCheck = st;
+ if (st) {
+ clk = (clk == 0) ? foundclk : clk;
+ CursorCPos = ststart;
+ CursorDPos = stend;
+ if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
+ //Graph ST trim (for testing)
+ //for (int i = 0; i < BitLen; i++) {
+ // GraphBuffer[i] = BitStream[i]-128;
+ //}
+ //RepaintGraphWindow();
+ }
+ int startIdx = 0;
+ int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx);
+ if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
+ if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
return 0;
}
- PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);
-
+ if (errCnt > maxErr){
+ if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
+ return 0;
+ }
+ if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
//output
- if (errCnt>0){
- PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, startIdx);
+
+ if (verbose || g_debugMode){
+ if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+ if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
+ else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
+
}
- PrintAndLog("ASK/Manchester decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- setDemodBuf(BitStream,BitLen);
- printDemodBuff();
- uint64_t lo =0;
- lo = Em410xDecode(BitStream,BitLen);
- if (lo>0){
- //set GraphBuffer for clone or sim command
- PrintAndLog("EM410x pattern found: ");
- printEM410x(lo);
- return 1;
+ uint64_t lo = 0;
+ uint32_t hi = 0;
+ if (emSearch){
+ AskEm410xDecode(true, &hi, &lo);
}
- //if (BitLen>16) return 1;
- return 0;
+ return 1;
+}
+int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
+ bool st = false;
+ return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
+}
+
+//by marshmellow
+//takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
+//attempts to demodulate ask while decoding manchester
+//prints binary found and saves in graphbuffer for further commands
+int Cmdaskmandemod(const char *Cmd)
+{
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
+ PrintAndLog(" ['s'] optional, check for Sequence Terminator");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
+ PrintAndLog(" <invert>, 1 to invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100");
+ PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
+ PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ return 0;
+ }
+ bool st = true;
+ 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);
+ else
+ return ASKDemod(Cmd, true, false, 1);
}
//by marshmellow
int i =0;
int errCnt=0;
size_t size=0;
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ int invert=0;
+ int maxErr = 20;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
+ 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("");
+ PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
+ return 0;
+ }
+ if (DemodBufferLen==0) return 0;
+ uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
int high=0,low=0;
for (;i<DemodBufferLen;++i){
if (DemodBuffer[i]>high) high=DemodBuffer[i];
else if(DemodBuffer[i]<low) low=DemodBuffer[i];
BitStream[i]=DemodBuffer[i];
}
- if (high>1 || low <0 ){
- PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
+ if (high>7 || low <0 ){
+ PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
return 0;
}
+
+ sscanf(Cmd, "%i %i", &invert, &maxErr);
size=i;
- errCnt=manrawdecode(BitStream, &size);
- if (errCnt>=20){
+ uint8_t alignPos = 0;
+ errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
+ if (errCnt>=maxErr){
PrintAndLog("Too many errors: %d",errCnt);
return 0;
}
PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
- printBitStream(BitStream, size);
+ PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (errCnt==0){
uint64_t id = 0;
- id = Em410xDecode(BitStream, size);
- if (id>0) setDemodBuf(BitStream, size);
- printEM410x(id);
+ uint32_t hi = 0;
+ size_t idx=0;
+ if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
+ //need to adjust to set bitstream back to manchester encoded data
+ //setDemodBuf(BitStream, size, idx);
+
+ printEM410x(hi, id);
+ }
}
return 1;
}
//by marshmellow
//biphase decode
//take 01 or 10 = 0 and 11 or 00 = 1
-//takes 1 argument "offset" default = 0 if 1 it will shift the decode by one bit
-// since it is not like manchester and doesn't have an incorrect bit pattern we
-// cannot determine if our decode is correct or if it should be shifted by one bit
-// the argument offset allows us to manually shift if the output is incorrect
-// (better would be to demod and decode at the same time so we can distinguish large
-// width waves vs small width waves to help the decode positioning) or askbiphdemod
+//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]
int CmdBiphaseDecodeRaw(const char *Cmd)
{
- int i = 0;
- int errCnt=0;
size_t size=0;
- int offset=0;
- int high=0, low=0;
- sscanf(Cmd, "%i", &offset);
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- //get graphbuffer & high and low
- for (;i<DemodBufferLen;++i){
- if(DemodBuffer[i]>high)high=DemodBuffer[i];
- else if(DemodBuffer[i]<low)low=DemodBuffer[i];
- BitStream[i]=DemodBuffer[i];
+ int offset=0, invert=0, maxErr=20, errCnt=0;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 3 || 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(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
+ PrintAndLog("");
+ PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
+ PrintAndLog(" [invert <0|1>], set to 1 to invert output");
+ PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
+ PrintAndLog("");
+ PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
+ PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
+ return 0;
}
- if (high>1 || low <0){
- PrintAndLog("Error: please raw demod the wave first then decode");
+ sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
+ if (DemodBufferLen==0) {
+ PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
return 0;
}
- size=i;
- errCnt=BiphaseRawDecode(BitStream, &size, offset);
- if (errCnt>=20){
+ uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
+ size = sizeof(BitStream);
+ if ( !getDemodBuf(BitStream, &size) ) return 0;
+ errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert);
+ if (errCnt<0){
+ PrintAndLog("Error during decode:%d", errCnt);
+ return 0;
+ }
+ if (errCnt>maxErr){
PrintAndLog("Too many errors attempting to decode: %d",errCnt);
return 0;
}
- PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
- printBitStream(BitStream, size);
- PrintAndLog("\nif bitstream does not look right try offset=1");
+
+ if (errCnt>0){
+ PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
+ }
+
+ 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;
}
-
//by marshmellow
-//takes 2 arguments - clock and invert both as integers
-//attempts to demodulate ask only
-//prints binary found and saves in graphbuffer for further commands
-int Cmdaskrawdemod(const char *Cmd)
+// - ASK Demod then Biphase decode GraphBuffer samples
+int ASKbiphaseDemod(const char *Cmd, bool verbose)
{
- int invert=0;
- int clk=0;
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- sscanf(Cmd, "%i %i", &clk, &invert);
- if (invert != 0 && invert != 1) {
- PrintAndLog("Invalid argument: %s", Cmd);
+ //ask raw demod GraphBuffer first
+ int offset=0, clk=0, invert=0, maxErr=0;
+ sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
+
+ 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;
+ }
+
+ //attempt to Biphase decode BitStream
+ errCnt = BiphaseRawDecode(BitStream, &size, &offset, invert);
+ if (errCnt < 0){
+ if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
return 0;
}
- size_t BitLen = getFromGraphBuf(BitStream);
- int errCnt=0;
- errCnt = askrawdemod(BitStream, &BitLen,&clk,&invert);
- if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
- PrintAndLog("no data found");
+ if (errCnt > maxErr) {
+ if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
return 0;
}
- PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
- //PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
- //move BitStream back to DemodBuffer
- setDemodBuf(BitStream,BitLen);
-
- //output
- if (errCnt>0){
- PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ //success set DemodBuffer and return
+ setDemodBuf(BitStream, size, 0);
+ setClockGrid(clk, startIdx + clk*offset/2);
+ if (g_debugMode || verbose){
+ PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
+ printDemodBuff();
}
- PrintAndLog("ASK demoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- printBitStream(BitStream,BitLen);
-
return 1;
}
-
-int CmdAutoCorr(const char *Cmd)
+//by marshmellow - see ASKbiphaseDemod
+int Cmdaskbiphdemod(const char *Cmd)
{
- static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
-
- int window = atoi(Cmd);
-
- if (window == 0) {
- PrintAndLog("needs a window");
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
+ PrintAndLog(" [offset], offset to begin biphase, default=0");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
+ PrintAndLog(" <invert>, 1 to invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100");
+ PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
+ PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+ PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
+ PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
+ PrintAndLog(" NOTE: any other arg must have previous args set to work");
+ PrintAndLog("");
+ PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
+ PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
+ PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
return 0;
}
- if (window >= GraphTraceLen) {
- PrintAndLog("window must be smaller than trace (%d samples)",
- GraphTraceLen);
+ return ASKbiphaseDemod(Cmd, true);
+}
+
+//by marshmellow - see ASKDemod
+int Cmdaskrawdemod(const char *Cmd)
+{
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
+ PrintAndLog(" <invert>, 1 to invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100");
+ PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
+ PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
+ PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
return 0;
}
+ return ASKDemod(Cmd, true, false, 0);
+}
- PrintAndLog("performing %d correlations", GraphTraceLen - window);
-
- for (int i = 0; i < GraphTraceLen - window; ++i) {
+int AutoCorrelate(const int *in, int *out, size_t len, int window, bool SaveGrph, bool verbose)
+{
+ static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
+ size_t Correlation = 0;
+ int maxSum = 0;
+ int lastMax = 0;
+ if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
+ for (int i = 0; i < len - window; ++i) {
int sum = 0;
for (int j = 0; j < window; ++j) {
- sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
+ sum += (in[j]*in[i + j]) / 256;
}
CorrelBuffer[i] = sum;
+ if (sum >= maxSum-100 && sum <= maxSum+100) {
+ //another max
+ Correlation = i-lastMax;
+ lastMax = i;
+ if (sum > maxSum) maxSum = sum;
+ } else if (sum > maxSum) {
+ maxSum=sum;
+ lastMax = i;
+ }
}
- GraphTraceLen = GraphTraceLen - window;
- memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
+ if (Correlation==0) {
+ //try again with wider margin
+ for (int i = 0; i < len - window; i++) {
+ if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)) {
+ //another max
+ Correlation = i-lastMax;
+ lastMax = i;
+ }
+ }
+ }
+ if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
- RepaintGraphWindow();
+ if (SaveGrph) {
+ //GraphTraceLen = GraphTraceLen - window;
+ memcpy(out, CorrelBuffer, len * sizeof(int));
+ RepaintGraphWindow();
+ }
+ return Correlation;
+}
+
+int usage_data_autocorr(void)
+{
+ //print help
+ PrintAndLog("Usage: data autocorr [window] [g]");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog(" [window] window length for correlation - default = 4000");
+ PrintAndLog(" g save back to GraphBuffer (overwrite)");
return 0;
}
+int CmdAutoCorr(const char *Cmd)
+{
+ char cmdp = param_getchar(Cmd, 0);
+ if (cmdp == 'h' || cmdp == 'H')
+ return usage_data_autocorr();
+ int window = 4000; //set default
+ char grph=0;
+ bool updateGrph = false;
+ sscanf(Cmd, "%i %c", &window, &grph);
+
+ if (window >= GraphTraceLen) {
+ PrintAndLog("window must be smaller than trace (%d samples)",
+ GraphTraceLen);
+ return 0;
+ }
+ if (grph == 'g') updateGrph=true;
+ return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true);
+}
+
int CmdBitsamples(const char *Cmd)
{
int cnt = 0;
return 0;
}
-/*
- * Convert to a bitstream
+int CmdBuffClear(const char *Cmd)
+{
+ UsbCommand c = {CMD_BUFF_CLEAR};
+ SendCommand(&c);
+ ClearGraph(true);
+ return 0;
+}
+
+int CmdDec(const char *Cmd)
+{
+ for (int i = 0; i < (GraphTraceLen / 2); ++i)
+ GraphBuffer[i] = GraphBuffer[i * 2];
+ GraphTraceLen /= 2;
+ PrintAndLog("decimated by 2");
+ RepaintGraphWindow();
+ return 0;
+}
+/**
+ * Undecimate - I'd call it 'interpolate', but we'll save that
+ * name until someone does an actual interpolation command, not just
+ * blindly repeating samples
+ * @param Cmd
+ * @return
*/
-int CmdBitstream(const char *Cmd)
+int CmdUndec(const char *Cmd)
{
- int i, j;
- int bit;
- int gtl;
- int clock;
- int low = 0;
- int high = 0;
- int hithigh, hitlow, first;
-
- /* Detect high and lows and clock */
- for (i = 0; i < GraphTraceLen; ++i)
+ if(param_getchar(Cmd, 0) == 'h')
{
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
+ PrintAndLog("Usage: data undec [factor]");
+ PrintAndLog("This function performs un-decimation, by repeating each sample N times");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
+ PrintAndLog("Example: 'data undec 3'");
+ return 0;
}
- /* Get our clock */
- clock = GetClock(Cmd, high, 1);
- gtl = ClearGraph(0);
-
- bit = 0;
- for (i = 0; i < (int)(gtl / clock); ++i)
+ 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 + factor < MAX_GRAPH_TRACE_LEN)
{
- hithigh = 0;
- hitlow = 0;
- first = 1;
- /* Find out if we hit both high and low peaks */
- for (j = 0; j < clock; ++j)
- {
- if (GraphBuffer[(i * clock) + j] == high)
- hithigh = 1;
- else if (GraphBuffer[(i * clock) + j] == low)
- hitlow = 1;
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
+ int count = 0;
+ for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
+ swap[s_index+count] = GraphBuffer[g_index];
- AppendGraph(0, clock, bit);
- // for (j = 0; j < (int)(clock/2); j++)
- // GraphBuffer[(i * clock) + j] = bit ^ 1;
- // for (j = (int)(clock/2); j < clock; j++)
- // GraphBuffer[(i * clock) + j] = bit;
+ s_index += count;
+ g_index++;
}
+ memcpy(GraphBuffer, swap, s_index * sizeof(int));
+ GraphTraceLen = s_index;
RepaintGraphWindow();
return 0;
}
-int CmdBuffClear(const char *Cmd)
+//by marshmellow
+//shift graph zero up or down based on input + or -
+int CmdGraphShiftZero(const char *Cmd)
{
- UsbCommand c = {CMD_BUFF_CLEAR};
- SendCommand(&c);
- ClearGraph(true);
+
+ int shift=0;
+ //set options from parameters entered with the command
+ sscanf(Cmd, "%i", &shift);
+ int shiftedVal=0;
+ for(int i = 0; i<GraphTraceLen; i++){
+ shiftedVal=GraphBuffer[i]+shift;
+ if (shiftedVal>127)
+ shiftedVal=127;
+ else if (shiftedVal<-127)
+ shiftedVal=-127;
+ GraphBuffer[i]= shiftedVal;
+ }
+ CmdNorm("");
return 0;
}
-int CmdDec(const char *Cmd)
+int AskEdgeDetect(const int *in, int *out, int len, int threshold) {
+ int Last = 0;
+ for(int i = 1; i<len; i++) {
+ if (in[i]-in[i-1] >= threshold) //large jump up
+ Last = 127;
+ else if(in[i]-in[i-1] <= -1 * threshold) //large jump down
+ Last = -127;
+ out[i-1] = Last;
+ }
+ return 0;
+}
+
+//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
+//takes a threshold length which is the measured length between two samples then determines an edge
+int CmdAskEdgeDetect(const char *Cmd)
{
- for (int i = 0; i < (GraphTraceLen / 2); ++i)
- GraphBuffer[i] = GraphBuffer[i * 2];
- GraphTraceLen /= 2;
- PrintAndLog("decimated by 2");
+ int thresLen = 25;
+ int ans = 0;
+ sscanf(Cmd, "%i", &thresLen);
+
+ ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
RepaintGraphWindow();
- return 0;
+ return ans;
}
/* Print our clock rate */
// uses data from graphbuffer
+// adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
int CmdDetectClockRate(const char *Cmd)
{
- GetClock("",0,0);
- //int clock = DetectASKClock(0);
- //PrintAndLog("Auto-detected clock rate: %d", clock);
- return 0;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data detectclock [modulation] <clock>");
+ PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
+ PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
+ PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
+ PrintAndLog("");
+ PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
+ PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
+ }
+ int ans=0;
+ if (cmdp == 'a'){
+ ans = GetAskClock(Cmd+1, true, false);
+ } else if (cmdp == 'f'){
+ ans = GetFskClock("", true, false);
+ } else if (cmdp == 'n'){
+ ans = GetNrzClock("", true, false);
+ } else if (cmdp == 'p'){
+ ans = GetPskClock("", true, false);
+ } else {
+ PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
+ }
+ return ans;
+}
+
+char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
+{
+ static char fType[8];
+ memset(fType, 0x00, 8);
+ char *fskType = fType;
+ if (fchigh==10 && fclow==8){
+ if (invert) //fsk2a
+ memcpy(fskType, "FSK2a", 5);
+ else //fsk2
+ memcpy(fskType, "FSK2", 4);
+ } else if (fchigh == 8 && fclow == 5) {
+ if (invert)
+ memcpy(fskType, "FSK1", 4);
+ else
+ memcpy(fskType, "FSK1a", 5);
+ } else {
+ memcpy(fskType, "FSK??", 5);
+ }
+ return fskType;
}
//by marshmellow
//fsk raw demod and print binary
-//takes 4 arguments - Clock, invert, rchigh, rclow
-//defaults: clock = 50, invert=0, rchigh=10, rclow=8 (RF/10 RF/8 (fsk2a))
-int CmdFSKrawdemod(const char *Cmd)
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int FSKrawDemod(const char *Cmd, bool verbose)
{
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
+ uint8_t rfLen, invert, fchigh, fclow;
//set defaults
- int rfLen = 50;
- int invert=0;
- int fchigh=10;
- int fclow=8;
//set options from parameters entered with the command
- sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);
+ rfLen = param_get8(Cmd, 0);
+ invert = param_get8(Cmd, 1);
+ fchigh = param_get8(Cmd, 2);
+ fclow = param_get8(Cmd, 3);
if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
- //rfLen=param_get8(Cmd, 0); //if rfLen option only is used
- if (rfLen==1){
- invert=1; //if invert option only is used
- rfLen = 50;
- } else if(rfLen==0) rfLen=50;
+ if (rfLen==1) {
+ invert = 1; //if invert option only is used
+ rfLen = 0;
+ }
}
- PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow);
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
- int size = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
- if (size>0){
- PrintAndLog("FSK decoded bitstream:");
- setDemodBuf(BitStream,size);
+ if (BitLen==0) return 0;
+ //get field clock lengths
+ uint16_t fcs=0;
+ if (!fchigh || !fclow) {
+ fcs = countFC(BitStream, BitLen, 1);
+ if (!fcs) {
+ fchigh = 10;
+ fclow = 8;
+ } else {
+ fchigh = (fcs >> 8) & 0x00FF;
+ fclow = fcs & 0x00FF;
+ }
+ }
+ //get bit clock length
+ if (!rfLen) {
+ int firstClockEdge = 0; //todo - align grid on graph with this...
+ rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
+ if (!rfLen) rfLen = 50;
+ }
+ int startIdx = 0;
+ int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
+ if (size > 0) {
+ setDemodBuf(BitStream,size,0);
+ setClockGrid(rfLen, startIdx);
+
+ // 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));
+ printDemodBuff();
+ }
- // Now output the bitstream to the scrollback by line of 16 bits
- if(size > (8*32)+2) size = (8*32)+2; //only output a max of 8 blocks of 32 bits most tags will have full bit stream inside that sample size
- printBitStream(BitStream,size);
- } else{
- PrintAndLog("no FSK data found");
+ return 1;
+ } else {
+ if (g_debugMode) PrintAndLog("no FSK data found");
}
return 0;
}
-//by marshmellow (based on existing demod + holiman's refactor)
-//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
-//print full HID Prox ID and some bit format details if found
-int CmdFSKdemodHID(const char *Cmd)
+//by marshmellow
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int CmdFSKrawdemod(const char *Cmd)
{
- //raw fsk demod no manchester decoding no start bit finding just get binary from wave
- uint32_t hi2=0, hi=0, lo=0;
-
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- size_t BitLen = getFromGraphBuf(BitStream);
- //get binary from fsk wave
- size_t size = HIDdemodFSK(BitStream,BitLen,&hi2,&hi,&lo);
- if (size<0){
- PrintAndLog("Error demoding fsk");
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
+ PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
+ PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
+ PrintAndLog(" [fclow], small field clock length, omit for autodetect");
+ 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 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");
+ PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
return 0;
}
- if (hi2==0 && hi==0 && lo==0) return 0;
- if (hi2 != 0){ //extra large HID tags
- PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
- (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
- setDemodBuf(BitStream,BitLen);
- return 1;
- }
- else { //standard HID tags <38 bits
- //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
- uint8_t fmtLen = 0;
- uint32_t fc = 0;
- uint32_t cardnum = 0;
- if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
- uint32_t lo2=0;
- lo2=(((hi & 15) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
- uint8_t idx3 = 1;
- while(lo2>1){ //find last bit set to 1 (format len bit)
- lo2=lo2>>1;
- idx3++;
- }
- fmtLen =idx3+19;
- fc =0;
- cardnum=0;
- if(fmtLen==26){
- cardnum = (lo>>1)&0xFFFF;
- fc = (lo>>17)&0xFF;
- }
- if(fmtLen==37){
- cardnum = (lo>>1)&0x7FFFF;
- fc = ((hi&0xF)<<12)|(lo>>20);
- }
- if(fmtLen==34){
- cardnum = (lo>>1)&0xFFFF;
- fc= ((hi&1)<<15)|(lo>>17);
- }
- if(fmtLen==35){
- cardnum = (lo>>1)&0xFFFFF;
- fc = ((hi&1)<<11)|(lo>>21);
- }
- }
- else { //if bit 38 is not set then 37 bit format is used
- fmtLen= 37;
- fc =0;
- cardnum=0;
- if(fmtLen==37){
- cardnum = (lo>>1)&0x7FFFF;
- fc = ((hi&0xF)<<12)|(lo>>20);
- }
- }
- PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
- (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
- (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
- setDemodBuf(BitStream,BitLen);
- return 1;
- }
- return 0;
+ return FSKrawDemod(Cmd, true);
}
//by marshmellow
-//IO-Prox demod - FSK RF/64 with preamble of 000000001
-//print ioprox ID and some format details
-int CmdFSKdemodIO(const char *Cmd)
+//attempt to psk1 demod graph buffer
+int PSKDemod(const char *Cmd, bool verbose)
{
- //raw fsk demod no manchester decoding no start bit finding just get binary from wave
- //set defaults
- int idx=0;
- //something in graphbuffer
- if (GraphTraceLen < 65) return 0;
+ int invert=0;
+ int clk=0;
+ int maxErr=100;
+ sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
+ if (invert != 0 && invert != 1) {
+ if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
+ return 0;
+ }
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
- //get binary from fsk wave
- // PrintAndLog("DEBUG: got buff");
- idx = IOdemodFSK(BitStream,BitLen);
- if (idx<0){
- //PrintAndLog("Error demoding fsk");
+ if (BitLen==0) return 0;
+ int errCnt=0;
+ int startIdx = 0;
+ errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
+ 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;
- }
- // PrintAndLog("DEBUG: Got IOdemodFSK");
- if (idx==0){
- //PrintAndLog("IO Prox Data not found - FSK Data:");
- //if (BitLen > 92) printBitStream(BitStream,92);
+ }
+ 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;
}
- //Index map
- //0 10 20 30 40 50 60
- //| | | | | | |
- //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
- //-----------------------------------------------------------------------------
- //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
- //
- //XSF(version)facility:codeone+codetwo (raw)
- //Handle the data
- if (idx+64>BitLen) return 0;
- PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
- PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
-
- uint32_t code = bytebits_to_byte(BitStream+idx,32);
- uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
- uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
- uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
- uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
- PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
- int i;
- for (i=0;i<64;++i)
- DemodBuffer[i]=BitStream[idx++];
-
- DemodBufferLen=64;
- return 1;
-}
-int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
-{
- 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,
- 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,
- };
-
- int lowLen = sizeof (LowTone) / sizeof (int);
- int highLen = sizeof (HighTone) / sizeof (int);
- int convLen = (highLen > lowLen) ? highLen : lowLen; //if highlen > lowLen then highlen else lowlen
- uint32_t hi = 0, lo = 0;
-
- int i, j;
- int minMark = 0, maxMark = 0;
-
- for (i = 0; i < GraphTraceLen - convLen; ++i) {
- int lowSum = 0, highSum = 0;
-
- for (j = 0; j < lowLen; ++j) {
- lowSum += LowTone[j]*GraphBuffer[i+j];
- }
- for (j = 0; j < highLen; ++j) {
- highSum += HighTone[j] * GraphBuffer[i + j];
- }
- lowSum = abs(100 * lowSum / lowLen);
- highSum = abs(100 * highSum / highLen);
- GraphBuffer[i] = (highSum << 16) | lowSum;
- }
-
- for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
- int lowTot = 0, highTot = 0;
- // 10 and 8 are f_s divided by f_l and f_h, rounded
- for (j = 0; j < 10; ++j) {
- lowTot += (GraphBuffer[i+j] & 0xffff);
- }
- for (j = 0; j < 8; j++) {
- highTot += (GraphBuffer[i + j] >> 16);
- }
- GraphBuffer[i] = lowTot - highTot;
- if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
- if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
- }
-
- GraphTraceLen -= (convLen + 16);
- RepaintGraphWindow();
-
- // Find bit-sync (3 lo followed by 3 high) (HID ONLY)
- int max = 0, maxPos = 0;
- for (i = 0; i < 6000; ++i) {
- int dec = 0;
- for (j = 0; j < 3 * lowLen; ++j) {
- dec -= GraphBuffer[i + j];
- }
- for (; j < 3 * (lowLen + highLen ); ++j) {
- dec += GraphBuffer[i + j];
- }
- if (dec > max) {
- max = dec;
- maxPos = i;
+ if (verbose || g_debugMode){
+ PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
+ if (errCnt>0){
+ PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
}
}
+ //prime demod buffer for output
+ setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, startIdx);
- // place start of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- maxPos += j;
-
- // place end of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos+1] = minMark;
-
- PrintAndLog("actual data bits start at sample %d", maxPos);
- PrintAndLog("length %d/%d", highLen, lowLen);
-
- uint8_t bits[46];
- bits[sizeof(bits)-1] = '\0';
-
- // find bit pairs and manchester decode them
- for (i = 0; i < arraylen(bits) - 1; ++i) {
- int dec = 0;
- for (j = 0; j < lowLen; ++j) {
- dec -= GraphBuffer[maxPos + j];
- }
- for (; j < lowLen + highLen; ++j) {
- dec += GraphBuffer[maxPos + j];
- }
- maxPos += j;
- // place inter bit marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- // hi and lo form a 64 bit pair
- hi = (hi << 1) | (lo >> 31);
- lo = (lo << 1);
- // store decoded bit as binary (in hi/lo) and text (in bits[])
- if(dec < 0) {
- bits[i] = '1';
- lo |= 1;
- } else {
- bits[i] = '0';
- }
- }
- PrintAndLog("bits: '%s'", bits);
- PrintAndLog("hex: %08x %08x", hi, lo);
- return 0;
+ return 1;
}
-int CmdDetectNRZpskClockRate(const char *Cmd)
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate nrz only
+// prints binary found and saves in demodbuffer for further commands
+int NRZrawDemod(const char *Cmd, bool verbose)
{
- GetNRZpskClock("",0,0);
- return 0;
-}
-
-int PSKnrzDemod(const char *Cmd){
int invert=0;
int clk=0;
- sscanf(Cmd, "%i %i", &clk, &invert);
+ int maxErr=100;
+ sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
- return -1;
+ return 0;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
+ if (BitLen==0) return 0;
int errCnt=0;
- errCnt = pskNRZrawDemod(BitStream, &BitLen,&clk,&invert);
- if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
- //PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
- return -1;
- }
- PrintAndLog("Tried PSK/NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
-
- //prime demod buffer for output
- setDemodBuf(BitStream,BitLen);
- return errCnt;
-}
-// Indala 26 bit decode
-// by marshmellow
-// optional arguments - same as CmdpskNRZrawDemod (clock & invert)
-int CmdIndalaDecode(const char *Cmd)
-{
-
- int ans=PSKnrzDemod(Cmd);
- if (ans < 0){
- PrintAndLog("Error1: %d",ans);
+ int clkStartIdx = 0;
+ errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
+ 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;
}
- uint8_t invert=0;
- ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
- if (ans < 1) {
- PrintAndLog("Error2: %d",ans);
- return -1;
- }
- char showbits[251];
- if(invert==1) PrintAndLog("Had to invert bits");
- //convert UID to HEX
- uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
- int idx;
- uid1=0;
- uid2=0;
- PrintAndLog("BitLen: %d",DemodBufferLen);
- if (DemodBufferLen==64){
- for( idx=0; idx<64; idx++) {
- uid1=(uid1<<1)|(uid2>>31);
- if (DemodBuffer[idx] == 0) {
- uid2=(uid2<<1)|0;
- showbits[idx]='0';
- } else {
- uid2=(uid2<<1)|1;
- showbits[idx]='1';
- }
- }
- showbits[idx]='\0';
- PrintAndLog("Indala UID=%s (%x%08x)", showbits, uid1, uid2);
- }
- else {
- uid3=0;
- uid4=0;
- uid5=0;
- uid6=0;
- uid7=0;
- for( idx=0; idx<DemodBufferLen; idx++) {
- uid1=(uid1<<1)|(uid2>>31);
- uid2=(uid2<<1)|(uid3>>31);
- uid3=(uid3<<1)|(uid4>>31);
- uid4=(uid4<<1)|(uid5>>31);
- uid5=(uid5<<1)|(uid6>>31);
- uid6=(uid6<<1)|(uid7>>31);
- if (DemodBuffer[idx] == 0) {
- uid7=(uid7<<1)|0;
- showbits[idx]='0';
- }
- else {
- uid7=(uid7<<1)|1;
- showbits[idx]='1';
- }
- }
- showbits[idx]='\0';
- PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
+ if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
+ //prime demod buffer for output
+ setDemodBuf(BitStream,BitLen,0);
+ setClockGrid(clk, clkStartIdx);
+
+
+ if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+ if (verbose || g_debugMode) {
+ PrintAndLog("NRZ demoded bitstream:");
+ // Now output the bitstream to the scrollback by line of 16 bits
+ printDemodBuff();
}
- return 1;
+ return 1;
}
-/*
-//by marshmellow (attempt to get rid of high immediately after a low)
-void pskCleanWave2(uint8_t *bitStream, int bitLen)
+int CmdNRZrawDemod(const char *Cmd)
{
- int i;
- int low=128;
- int gap = 4;
- // int loopMax = 2048;
- int newLow=0;
-
- for (i=0; i<bitLen; ++i)
- if (bitStream[i]<low) low=bitStream[i];
-
- low = (int)(((low-128)*.80)+128);
- PrintAndLog("low: %d",low);
- for (i=0; i<bitLen; ++i){
- if (newLow==1){
- bitStream[i]=low+5;
- gap--;
- if (gap==0){
- newLow=0;
- gap=4;
- }
- }
- if (bitStream[i]<=low) newLow=1;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ return 0;
}
- return;
-}
-*/
-int CmdPskClean(const char *Cmd)
-{
- uint8_t bitStream[MAX_GRAPH_TRACE_LEN]={0};
- size_t bitLen = getFromGraphBuf(bitStream);
- pskCleanWave(bitStream, bitLen);
- setGraphBuf(bitStream, bitLen);
- return 0;
+ return NRZrawDemod(Cmd, true);
}
-//by marshmellow
-//takes 2 arguments - clock and invert both as integers
-//attempts to demodulate ask only
-//prints binary found and saves in graphbuffer for further commands
-int CmdpskNRZrawDemod(const char *Cmd)
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate psk only
+// prints binary found and saves in demodbuffer for further commands
+int CmdPSK1rawDemod(const char *Cmd)
{
- int errCnt= PSKnrzDemod(Cmd);
+ int ans;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
+ PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ return 0;
+ }
+ ans = PSKDemod(Cmd, true);
//output
- if (errCnt<0) return 0;
- if (errCnt>0){
- PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ if (!ans){
+ if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
+ return 0;
}
- PrintAndLog("PSK or NRZ demoded bitstream:");
+
+ PrintAndLog("PSK1 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
+ return 1;
+}
+// by marshmellow
+// takes same args as cmdpsk1rawdemod
+int CmdPSK2rawDemod(const char *Cmd)
+{
+ int ans=0;
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
+ PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
+ PrintAndLog(" <invert>, 1 for invert output");
+ PrintAndLog(" [set maximum allowed errors], default = 100.");
+ PrintAndLog("");
+ PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
+ PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
+ PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
+ PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
+ return 0;
+ }
+ ans=PSKDemod(Cmd, true);
+ if (!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();
return 1;
}
+// by marshmellow - combines all raw demod functions into one menu command
+int CmdRawDemod(const char *Cmd)
+{
+ char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
+
+ 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(" '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("");
+ PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
+ PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
+ PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
+ PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
+ PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
+ PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
+ PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
+ PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
+ return 0;
+ }
+ char cmdp2 = Cmd[1];
+ int ans = 0;
+ if (cmdp == 'f' && cmdp2 == 's'){
+ ans = CmdFSKrawdemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'b'){
+ ans = Cmdaskbiphdemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'm'){
+ ans = Cmdaskmandemod(Cmd+2);
+ } else if(cmdp == 'a' && cmdp2 == 'r'){
+ ans = Cmdaskrawdemod(Cmd+2);
+ } else if(cmdp == 'n' && cmdp2 == 'r'){
+ ans = CmdNRZrawDemod(Cmd+2);
+ } else if(cmdp == 'p' && cmdp2 == '1'){
+ ans = CmdPSK1rawDemod(Cmd+2);
+ } else if(cmdp == 'p' && cmdp2 == '2'){
+ ans = CmdPSK2rawDemod(Cmd+2);
+ } else {
+ PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
+ }
+ return ans;
+}
+void setClockGrid(int clk, int offset) {
+ g_DemodStartIdx = offset;
+ g_DemodClock = clk;
+ if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk);
+
+ if (offset > clk) offset %= clk;
+ if (offset < 0) offset += clk;
+
+ if (offset > GraphTraceLen || offset < 0) return;
+ if (clk < 8 || clk > GraphTraceLen) {
+ GridLocked = false;
+ GridOffset = 0;
+ PlotGridX = 0;
+ PlotGridXdefault = 0;
+ RepaintGraphWindow();
+ } else {
+ GridLocked = true;
+ GridOffset = offset;
+ PlotGridX = clk;
+ PlotGridXdefault = clk;
+ RepaintGraphWindow();
+ }
+}
int CmdGrid(const char *Cmd)
{
return 0;
}
+int CmdSetGraphMarkers(const char *Cmd) {
+ sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
+ RepaintGraphWindow();
+ return 0;
+}
+
int CmdHexsamples(const char *Cmd)
{
int i, j;
int offset = 0;
char string_buf[25];
char* string_ptr = string_buf;
- uint8_t got[40000];
+ uint8_t got[BIGBUF_SIZE];
sscanf(Cmd, "%i %i", &requested, &offset);
requested = 8;
}
if (offset + requested > sizeof(got)) {
- PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 40000");
+ PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
return 0;
}
return 0;
}
+//zero mean GraphBuffer
int CmdHpf(const char *Cmd)
{
int i;
return 0;
}
-int CmdSamples(const char *Cmd)
+uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
{
- int cnt = 0;
- int n;
- uint8_t got[40000];
+ int i;
+ uint8_t val = 0;
+ for(i =0 ; i < bits_per_sample; i++)
+ {
+ val |= (headBit(b) << (7-i));
+ }
+ return val;
+}
+
+int getSamples(int n, bool silent)
+{
+ //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[BIGBUF_SIZE-1] = { 0 };
- n = strtol(Cmd, NULL, 0);
- if (n == 0) n = 6000;
- if (n > sizeof(got)) n = sizeof(got);
+ if (n == 0 || n > sizeof(got))
+ n = sizeof(got);
- PrintAndLog("Reading %d samples\n", n);
+ if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
GetFromBigBuf(got,n,0);
- WaitForResponse(CMD_ACK,NULL);
- for (int j = 0; j < n; j++) {
- GraphBuffer[cnt++] = ((int)got[j]) - 128;
+ if (!silent) PrintAndLog("Data fetched");
+ UsbCommand response;
+ WaitForResponse(CMD_ACK, &response);
+ 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;
+ 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...");
+ BitstreamIn bout = { got, bits_per_sample * n, 0};
+ int j =0;
+ for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
+ uint8_t sample = getByte(bits_per_sample, &bout);
+ GraphBuffer[j] = ((int) sample )- 128;
+ }
+ GraphTraceLen = j;
+ PrintAndLog("Unpacked %d samples" , j );
+ }else
+ {
+ for (int j = 0; j < n; j++) {
+ GraphBuffer[j] = ((int)got[j]) - 128;
+ }
+ GraphTraceLen = n;
}
- PrintAndLog("Done!\n");
- GraphTraceLen = n;
+ setClockGrid(0,0);
+ DemodBufferLen = 0;
RepaintGraphWindow();
return 0;
}
+int CmdSamples(const char *Cmd)
+{
+ int n = strtol(Cmd, NULL, 0);
+ return getSamples(n, false);
+}
+
int CmdTuneSamples(const char *Cmd)
{
- int timeout = 0;
+ int timeout = 0, arg = FLAG_TUNE_ALL;
+
+ if(*Cmd == 'l') {
+ arg = FLAG_TUNE_LF;
+ } else if (*Cmd == 'h') {
+ arg = FLAG_TUNE_HF;
+ } else if (*Cmd != '\0') {
+ PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
+ return 0;
+ }
+
printf("\nMeasuring antenna characteristics, please wait...");
- UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
+ UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
SendCommand(&c);
UsbCommand resp;
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);
- if (peakv<2000)
- PrintAndLog("# Your LF antenna is unusable.");
- else if (peakv<10000)
- PrintAndLog("# Your LF antenna is marginal.");
- if (vHf<2000)
- PrintAndLog("# Your HF antenna is unusable.");
- else if (vHf<5000)
- PrintAndLog("# Your HF antenna is marginal.");
-
- for (int i = 0; i < 256; i++) {
- GraphBuffer[i] = resp.d.asBytes[i] - 128;
- }
-
- PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n");
- PrintAndLog("\n");
- GraphTraceLen = 256;
- ShowGraphWindow();
+ 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;
+ }
+ PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
+ PrintAndLog("\n");
+ GraphTraceLen = 256;
+ ShowGraphWindow();
+ RepaintGraphWindow();
+ }
- return 0;
+ return 0;
}
int CmdLoad(const char *Cmd)
{
- FILE *f = fopen(Cmd, "r");
+ char filename[FILE_PATH_SIZE] = {0x00};
+ int len = 0;
+
+ 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'", Cmd);
+ PrintAndLog("couldn't open '%s'", filename);
return 0;
}
}
fclose(f);
PrintAndLog("loaded %d samples", GraphTraceLen);
+ setClockGrid(0,0);
+ DemodBufferLen = 0;
RepaintGraphWindow();
return 0;
}
int CmdLtrim(const char *Cmd)
{
int ds = atoi(Cmd);
-
+ if (GraphTraceLen<=0) return 0;
for (int i = ds; i < GraphTraceLen; ++i)
GraphBuffer[i-ds] = GraphBuffer[i];
GraphTraceLen -= ds;
RepaintGraphWindow();
return 0;
}
+
+// trim graph to input argument length
int CmdRtrim(const char *Cmd)
{
int ds = atoi(Cmd);
return 0;
}
-/*
- * Manchester demodulate a bitstream. The bitstream needs to be already in
- * the GraphBuffer as 0 and 1 values
- *
- * Give the clock rate as argument in order to help the sync - the algorithm
- * resyncs at each pulse anyway.
- *
- * Not optimized by any means, this is the 1st time I'm writing this type of
- * routine, feel free to improve...
- *
- * 1st argument: clock rate (as number of samples per clock rate)
- * Typical values can be 64, 32, 128...
- */
-int CmdManchesterDemod(const char *Cmd)
-{
- int i, j, invert= 0;
- int bit;
- int clock;
- int lastval = 0;
- int low = 0;
- int high = 0;
- int hithigh, hitlow, first;
- int lc = 0;
- int bitidx = 0;
- int bit2idx = 0;
- int warnings = 0;
-
- /* check if we're inverting output */
- if (*Cmd == 'i')
- {
- PrintAndLog("Inverting output");
- invert = 1;
- ++Cmd;
- do
- ++Cmd;
- while(*Cmd == ' '); // in case a 2nd argument was given
- }
-
- /* Holds the decoded bitstream: each clock period contains 2 bits */
- /* later simplified to 1 bit after manchester decoding. */
- /* Add 10 bits to allow for noisy / uncertain traces without aborting */
- /* int BitStream[GraphTraceLen*2/clock+10]; */
-
- /* But it does not work if compiling on WIndows: therefore we just allocate a */
- /* large array */
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0};
-
- /* Detect high and lows */
- for (i = 0; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
-
- /* Get our clock */
- clock = GetClock(Cmd, high, 1);
-
- int tolerance = clock/4;
-
- /* Detect first transition */
- /* Lo-Hi (arbitrary) */
- /* skip to the first high */
- for (i= 0; i < GraphTraceLen; i++)
- if (GraphBuffer[i] == high)
- break;
- /* now look for the first low */
- for (; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i] == low)
- {
- lastval = i;
- break;
- }
- }
-
- /* If we're not working with 1/0s, demod based off clock */
- if (high != 1)
- {
- bit = 0; /* We assume the 1st bit is zero, it may not be
- * the case: this routine (I think) has an init problem.
- * Ed.
- */
- for (; i < (int)(GraphTraceLen / clock); i++)
- {
- hithigh = 0;
- hitlow = 0;
- first = 1;
-
- /* Find out if we hit both high and low peaks */
- for (j = 0; j < clock; j++)
- {
- if (GraphBuffer[(i * clock) + j] == high)
- hithigh = 1;
- else if (GraphBuffer[(i * clock) + j] == low)
- hitlow = 1;
-
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
-
- BitStream[bit2idx++] = bit ^ invert;
- }
- }
-
- /* standard 1/0 bitstream */
- else
- {
-
- /* Then detect duration between 2 successive transitions */
- for (bitidx = 1; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i-1] != GraphBuffer[i])
- {
- lc = i-lastval;
- lastval = i;
-
- // Error check: if bitidx becomes too large, we do not
- // have a Manchester encoded bitstream or the clock is really
- // wrong!
- if (bitidx > (GraphTraceLen*2/clock+8) ) {
- PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
- return 0;
- }
- // Then switch depending on lc length:
- // Tolerance is 1/4 of clock rate (arbitrary)
- if (abs(lc-clock/2) < tolerance) {
- // Short pulse : either "1" or "0"
- BitStream[bitidx++]=GraphBuffer[i-1];
- } else if (abs(lc-clock) < tolerance) {
- // Long pulse: either "11" or "00"
- BitStream[bitidx++]=GraphBuffer[i-1];
- BitStream[bitidx++]=GraphBuffer[i-1];
- } else {
- // Error
- warnings++;
- PrintAndLog("Warning: Manchester decode error for pulse width detection.");
- PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)");
-
- if (warnings > 10)
- {
- PrintAndLog("Error: too many detection errors, aborting.");
- return 0;
- }
- }
- }
- }
+// trim graph (middle) piece
+int CmdMtrim(const char *Cmd) {
+ int start = 0, stop = 0;
+ sscanf(Cmd, "%i %i", &start, &stop);
- // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
- // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
- // to stop output at the final bitidx2 value, not bitidx
- for (i = 0; i < bitidx; i += 2) {
- if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) {
- BitStream[bit2idx++] = 1 ^ invert;
- } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) {
- BitStream[bit2idx++] = 0 ^ invert;
- } else {
- // We cannot end up in this state, this means we are unsynchronized,
- // move up 1 bit:
- i++;
- warnings++;
- PrintAndLog("Unsynchronized, resync...");
- PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
-
- if (warnings > 10)
- {
- PrintAndLog("Error: too many decode errors, aborting.");
- return 0;
- }
- }
- }
- }
+ if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
+ start++; //leave start position sample
- PrintAndLog("Manchester decoded bitstream");
- // Now output the bitstream to the scrollback by line of 16 bits
- for (i = 0; i < (bit2idx-16); i+=16) {
- PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i",
- BitStream[i],
- BitStream[i+1],
- BitStream[i+2],
- BitStream[i+3],
- BitStream[i+4],
- BitStream[i+5],
- BitStream[i+6],
- BitStream[i+7],
- BitStream[i+8],
- BitStream[i+9],
- BitStream[i+10],
- BitStream[i+11],
- BitStream[i+12],
- BitStream[i+13],
- BitStream[i+14],
- BitStream[i+15]);
+ GraphTraceLen = stop - start;
+ for (int i = 0; i < GraphTraceLen; i++) {
+ GraphBuffer[i] = GraphBuffer[start+i];
}
return 0;
}
-/* Modulate our data into manchester */
-int CmdManchesterMod(const char *Cmd)
-{
- int i, j;
- int clock;
- int bit, lastbit, wave;
-
- /* Get our clock */
- clock = GetClock(Cmd, 0, 1);
-
- wave = 0;
- lastbit = 1;
- for (i = 0; i < (int)(GraphTraceLen / clock); i++)
- {
- bit = GraphBuffer[i * clock] ^ 1;
-
- for (j = 0; j < (int)(clock/2); j++)
- GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
- for (j = (int)(clock/2); j < clock; j++)
- GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1;
-
- /* Keep track of how we start our wave and if we changed or not this time */
- wave ^= bit ^ lastbit;
- lastbit = bit;
- }
-
- RepaintGraphWindow();
- return 0;
-}
int CmdNorm(const char *Cmd)
{
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
}
}
int CmdSave(const char *Cmd)
{
- FILE *f = fopen(Cmd, "w");
+ char filename[FILE_PATH_SIZE] = {0x00};
+ int len = 0;
+
+ len = strlen(Cmd);
+ if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
+ memcpy(filename, Cmd, len);
+
+
+ FILE *f = fopen(filename, "w");
if(!f) {
- PrintAndLog("couldn't open '%s'", Cmd);
+ PrintAndLog("couldn't open '%s'", filename);
return 0;
}
int i;
return 0;
}
-int CmdThreshold(const char *Cmd)
+int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
{
- int threshold = atoi(Cmd);
+ int lastValue = in[0];
+ out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
- for (int i = 0; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i] >= threshold)
- GraphBuffer[i] = 1;
+ for (int i = 1; i < len; ++i) {
+ // Apply first threshold to samples heading up
+ if (in[i] >= up && in[i] > lastValue)
+ {
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = 1;
+ }
+ // Apply second threshold to samples heading down
+ else if (in[i] <= down && in[i] < lastValue)
+ {
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = -1;
+ }
else
- GraphBuffer[i] = -1;
+ {
+ lastValue = out[i]; // Buffer last value as we overwrite it.
+ out[i] = out[i-1];
+ }
}
- RepaintGraphWindow();
+ out[0] = out[1]; // Align with first edited sample.
return 0;
}
printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
- int lastValue = GraphBuffer[0];
- GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
-
- for (int i = 1; i < GraphTraceLen; ++i) {
- // Apply first threshold to samples heading up
- if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
- {
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = 1;
- }
- // Apply second threshold to samples heading down
- else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
- {
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = -1;
- }
- else
- {
- lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
- GraphBuffer[i] = GraphBuffer[i-1];
-
- }
- }
- GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
+ directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres);
RepaintGraphWindow();
return 0;
}
return 0;
}
+int usage_data_bin2hex(){
+ PrintAndLog("Usage: data bin2hex <binary_digits>");
+ PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
+ return 0;
+}
+
+/**
+ * @brief Utility for conversion via cmdline.
+ * @param Cmd
+ * @return
+ */
+int Cmdbin2hex(const char *Cmd)
+{
+ int bg =0, en =0;
+ if(param_getptr(Cmd, &bg, &en, 0))
+ {
+ return usage_data_bin2hex();
+ }
+ //Number of digits supplied as argument
+ size_t length = en - bg +1;
+ size_t bytelen = (length+7) / 8;
+ uint8_t* arr = (uint8_t *) malloc(bytelen);
+ memset(arr, 0, bytelen);
+ BitstreamOut bout = { arr, 0, 0 };
+
+ for(; bg <= en ;bg++)
+ {
+ char c = Cmd[bg];
+ if( c == '1') pushBit(&bout, 1);
+ else if( c == '0') pushBit(&bout, 0);
+ else PrintAndLog("Ignoring '%c'", c);
+ }
+
+ if(bout.numbits % 8 != 0)
+ {
+ printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
+ }
+
+ //Uses printf instead of PrintAndLog since the latter
+ // adds linebreaks to each printout - this way was more convenient since we don't have to
+ // allocate a string and write to that first...
+ for(size_t x = 0; x < bytelen ; x++)
+ {
+ printf("%02X", arr[x]);
+ }
+ printf("\n");
+ free(arr);
+ return 0;
+}
+
+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;
+
+}
+
+int Cmdhex2bin(const char *Cmd)
+{
+ int bg =0, en =0;
+ if(param_getptr(Cmd, &bg, &en, 0))
+ {
+ return usage_data_hex2bin();
+ }
+
+
+ while(bg <= en )
+ {
+ char x = Cmd[bg++];
+ // capitalize
+ if (x >= 'a' && x <= 'f')
+ x -= 32;
+ // convert to numeric value
+ if (x >= '0' && x <= '9')
+ x -= '0';
+ else if (x >= 'A' && x <= 'F')
+ x -= 'A' - 10;
+ else
+ continue;
+
+ //Uses printf instead of PrintAndLog since the latter
+ // adds linebreaks to each printout - this way was more convenient since we don't have to
+ // allocate a string and write to that first...
+
+ for(int i= 0 ; i < 4 ; ++i)
+ printf("%d",(x >> (3 - i)) & 1);
+ }
+ printf("\n");
+
+ 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"},
- {"amp", CmdAmp, 1, "Amplify peaks"},
- {"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
- {"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional[clock will try Auto-detect])"},
- {"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK tags and output binary (args optional[clock will try Auto-detect])"},
- {"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
- {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] Biphase decode binary stream already in graph buffer (offset = bit to start decode from)"},
- {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
- {"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
- {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
- {"dec", CmdDec, 1, "Decimate samples"},
- {"detectclock", CmdDetectClockRate, 1, "Detect ASK clock rate"},
- {"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
- {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate graph window as a HID FSK using raw"},
- {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate graph window as an IO Prox FSK using raw"},
- {"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to binary (clock = 50)(invert = 1 or 0)(rchigh = 10)(rclow=8)"},
- {"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"},
- {"hide", CmdHide, 1, "Hide graph window"},
- {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
- {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
- {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
- {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
- {"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
- {"manrawdecode", Cmdmandecoderaw, 1, "Manchester decode binary stream already in graph buffer"},
- {"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"},
- {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
- {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
- {"pskclean", CmdPskClean, 1, "Attempt to clean psk wave"},
- {"pskdetectclock",CmdDetectNRZpskClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
- {"pskindalademod",CmdIndalaDecode, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk indala tags and output ID binary & hex (args optional[clock will try Auto-detect])"},
- {"psknrzrawdemod",CmdpskNRZrawDemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate psk or nrz tags and output binary (args optional[clock will try Auto-detect])"},
- {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window"},
- {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
- {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
- {"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
- {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
- {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
- {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
+ {"help", CmdHelp, 1, "This help"},
+ {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
+ {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
+ {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
+ {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
+ {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
+ {"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"},
+ {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
+ {"hide", CmdHide, 1, "Hide graph window"},
+ {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
+ {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
+ {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
+ {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
+ {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
+ {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
+ {"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"},
+ {"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)"},
+ {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
+ {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
+ {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
+ {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
+ {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
+ {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
+ {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff