#include "cmdmain.h"
#include "cmddata.h"
#include "lfdemod.h"
+#include "usb_cmd.h"
+
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode;
int DemodBufferLen;
return;
}
-//by marshmellow
-//take binary from demod buffer and see if we can find an EM410x ID
-int CmdEm410xDecode(const char *Cmd)
-{
- uint64_t id=0;
- size_t size = DemodBufferLen, idx=0;
- id = Em410xDecode(DemodBuffer, &size, &idx);
- if (id>0){
- setDemodBuf(DemodBuffer, size, idx);
- if (g_debugMode){
- PrintAndLog("DEBUG: Printing demod buffer:");
- printDemodBuff();
- }
- printEM410x(id);
- return 1;
- }
- return 0;
-}
-
-
//by marshmellow
//takes 3 arguments - clock, invert and maxErr as integers
//attempts to demodulate ask while decoding manchester
int clk=0;
int maxErr=100;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
int clk=0;
int maxErr=100;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data askmandemod [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
+ }
+ if (clk==1){
+ invert=1;
+ clk=0;
}
size_t BitLen = getFromGraphBuf(BitStream);
if (g_debugMode==1) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
int i =0;
int errCnt=0;
size_t size=0;
+ size_t maxErr = 20;
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 1 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data manrawdecode");
}
size=i;
errCnt=manrawdecode(BitStream, &size);
- if (errCnt>=20){
+ if (errCnt>=maxErr){
PrintAndLog("Too many errors: %d",errCnt);
return 0;
}
int invert=0;
int high=0, low=0;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 2 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data biphaserawdecode [offset] <invert>");
PrintAndLog(" Converts 10 or 01 to 0 and 11 or 00 to 1");
PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
}
//by marshmellow
-//takes 3 arguments - clock, invert, maxErr as integers
+//takes 4 arguments - clock, invert, maxErr as integers and amplify as char
//attempts to demodulate ask only
//prints binary found and saves in graphbuffer for further commands
int Cmdaskrawdemod(const char *Cmd)
int invert=0;
int clk=0;
int maxErr=100;
+ uint8_t askAmp = 0;
+ char amp = param_getchar(Cmd, 0);
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data askrawdemod [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.");
+ if (strlen(Cmd) > 12 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data askrawdemod [clock] <invert> [maxError] [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(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
PrintAndLog("");
- PrintAndLog(" sample: data askrawdemod = demod an ask tag from GraphBuffer");
- PrintAndLog(" : data askrawdemod 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
- PrintAndLog(" : data askrawdemod 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
- PrintAndLog(" : data askrawdemod 1 = demod an ask tag from GraphBuffer while inverting data");
- PrintAndLog(" : data askrawdemod 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ PrintAndLog(" sample: data askrawdemod = demod an ask tag from GraphBuffer");
+ PrintAndLog(" : data askrawdemod a = demod an ask tag from GraphBuffer, amplified");
+ PrintAndLog(" : data askrawdemod 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
+ PrintAndLog(" : data askrawdemod 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
+ PrintAndLog(" : data askrawdemod 1 = demod an ask tag from GraphBuffer while inverting data");
+ PrintAndLog(" : data askrawdemod 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+ PrintAndLog(" : data askrawdemod 64 1 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;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+ sscanf(Cmd, "%i %i %i %c", &clk, &invert, &maxErr, &);
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
+ if (clk==1){
+ invert=1;
+ clk=0;
+ }
+ if (amp == 'a' || amp == 'A') askAmp=1;
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return 0;
int errCnt=0;
- errCnt = askrawdemod(BitStream, &BitLen, &clk, &invert, maxErr);
+ errCnt = askrawdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp);
if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
PrintAndLog("no data found");
if (g_debugMode==1) PrintAndLog("errCnt: %d, BitLen: %d, clk: %d, invert: %d", errCnt, BitLen, clk, invert);
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 CmdUndec(const char *Cmd)
+{
+ if(param_getchar(Cmd, 0) == 'h')
+ {
+ 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;
+ }
+
+ uint8_t factor = param_get8ex(Cmd, 0,2, 10);
+ //We have memory, don't we?
+ int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
+ uint32_t g_index = 0 ,s_index = 0;
+ while(g_index < GraphTraceLen && s_index < MAX_GRAPH_TRACE_LEN)
+ {
+ int count = 0;
+ for(count = 0; count < factor && s_index+count < MAX_GRAPH_TRACE_LEN; count ++)
+ swap[s_index+count] = GraphBuffer[g_index];
+ s_index+=count;
+ }
+
+ memcpy(GraphBuffer,swap, s_index * sizeof(int));
+ GraphTraceLen = s_index;
+ RepaintGraphWindow();
+ return 0;
+}
//by marshmellow
//shift graph zero up or down based on input + or -
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, and askdemod commands
+//takes a threshold length which is the measured length between two samples then determines an edge
+int CmdAskEdgeDetect(const char *Cmd)
+{
+ int thresLen = 25;
+ sscanf(Cmd, "%i", &thresLen);
+ int shift = 127;
+ int shiftedVal=0;
+ for(int i = 1; i<GraphTraceLen; i++){
+ if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
+ shift=127;
+ else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
+ shift=-127;
+
+ shiftedVal=GraphBuffer[i]+shift;
+
+ if (shiftedVal>127)
+ shiftedVal=127;
+ else if (shiftedVal<-127)
+ shiftedVal=-127;
+ GraphBuffer[i-1] = shiftedVal;
+ }
+ RepaintGraphWindow();
+ //CmdNorm("");
+ return 0;
+}
+
/* Print our clock rate */
// uses data from graphbuffer
int CmdDetectClockRate(const char *Cmd)
//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))
+//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
int fchigh=0;
int fclow=0;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 4 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data fskrawdemod [clock] <0|1> [rchigh] [rclow]");
- PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
- PrintAndLog(" <invert>, 1 for invert output");
-
- PrintAndLog(" [set maximum allowed errors], default = 100.");
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data fskrawdemod [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 fskrawdemod = demod an fsk tag from GraphBuffer using autodetect");
PrintAndLog(" : data fskrawdemod 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
+ PrintAndLog(" : data fskrawdemod 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
PrintAndLog(" : data fskrawdemod 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
PrintAndLog(" : data fskrawdemod 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
PrintAndLog(" : data fskrawdemod 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
return 0;
}
if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
- if (g_debugMode){
- PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
- return 1;
- }
+ PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
+ return 1;
}
if (g_debugMode){
PrintAndLog("DEBUG: unknown fsk field clock detected");
int clk=0;
int maxErr=100;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data nrzrawdemod [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
{
int errCnt;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data psk1rawdemod [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
{
int errCnt=0;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+ if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data psk2rawdemod [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
RepaintGraphWindow();
return 0;
}
+typedef struct {
+ uint8_t * buffer;
+ uint32_t numbits;
+ uint32_t position;
+}BitstreamOut;
+
+bool _headBit( BitstreamOut *stream)
+{
+ int bytepos = stream->position >> 3; // divide by 8
+ int bitpos = (stream->position++) & 7; // mask out 00000111
+ return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
+}
+
+uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
+{
+ int i;
+ uint8_t val = 0;
+ for(i =0 ; i < bits_per_sample; i++)
+ {
+ val |= (_headBit(b) << (7-i));
+ }
+ return val;
+}
int CmdSamples(const char *Cmd)
{
- uint8_t got[BIGBUF_SIZE] = {0x00};
+ //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 };
int n = strtol(Cmd, NULL, 0);
if (n == 0)
- n = 20000;
+ n = sizeof(got);
if (n > sizeof(got))
n = sizeof(got);
- PrintAndLog("Reading %d samples from device memory\n", n);
+ 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[j] = ((int)got[j]) - 128;
+ 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;
+ PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
+ , sc->decimation);
+ bits_per_sample = sc->bits_per_sample;
}
- GraphTraceLen = n;
+ if(bits_per_sample < 8)
+ {
+ PrintAndLog("Unpacking...");
+ BitstreamOut bout = { got, bits_per_sample * n, 0};
+ int j =0;
+ for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); 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;
+ }
+
RepaintGraphWindow();
return 0;
}
{"help", CmdHelp, 1, "This help"},
{"amp", CmdAmp, 1, "Amplify peaks"},
{"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
+ {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using length of sample differences to detect the edge of a wave - default = 25"},
{"askem410xdemod",CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional)"},
{"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional)"},
{"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0|1>] -- Attempt to demodulate ASK tags and output bin (args optional)"},
{"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"},
+ {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
+ {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
{NULL, NULL, 0, NULL}
};