#include <string.h>
#include "ui.h"
#include "graph.h"
+#include "lfdemod.h"
int GraphBuffer[MAX_GRAPH_TRACE_LEN];
int GraphTraceLen;
/* write a bit to the graph */
void AppendGraph(int redraw, int clock, int bit)
{
- int i;
+ int i;
- for (i = 0; i < (int)(clock / 2); ++i)
- GraphBuffer[GraphTraceLen++] = bit ^ 1;
-
- for (i = (int)(clock / 2); i < clock; ++i)
- GraphBuffer[GraphTraceLen++] = bit;
+ for (i = 0; i < (int)(clock / 2); ++i)
+ GraphBuffer[GraphTraceLen++] = bit ^ 1;
- if (redraw)
- RepaintGraphWindow();
+ for (i = (int)(clock / 2); i < clock; ++i)
+ GraphBuffer[GraphTraceLen++] = bit;
+
+ if (redraw)
+ RepaintGraphWindow();
}
-/* clear out our graph window */
+// clear out our graph window
int ClearGraph(int redraw)
{
- int gtl = GraphTraceLen;
- GraphTraceLen = 0;
+ int gtl = GraphTraceLen;
+ GraphTraceLen = 0;
- if (redraw)
- RepaintGraphWindow();
+ if (redraw)
+ RepaintGraphWindow();
- return gtl;
+ return gtl;
}
-/*
- * Detect clock rate
- */
- //decommissioned - has difficulty detecting rf/32 and only works if data is manchester encoded
-/*
-int DetectClock2(int peak)
-{
- int i;
- int clock = 0xFFFF;
- int lastpeak = 0;
-
- // Detect peak if we don't have one
- if (!peak)
- for (i = 0; i < GraphTraceLen; ++i)
- if (GraphBuffer[i] > peak)
- peak = GraphBuffer[i];
+// DETECT CLOCK NOW IN LFDEMOD.C
- // peak=(int)(peak*.75);
- for (i = 1; i < GraphTraceLen; ++i)
- {
- // If this is the beginning of a peak
- if (GraphBuffer[i - 1] != GraphBuffer[i] && GraphBuffer[i] >= peak)
- {
- // Find lowest difference between peaks
- if (lastpeak && i - lastpeak < clock)
- clock = i - lastpeak;
- lastpeak = i;
- }
- }
-
- return clock;
+void setGraphBuf(uint8_t *buff, size_t size)
+{
+ int i=0;
+ ClearGraph(0);
+ for (; i < size; ++i){
+ GraphBuffer[i]=buff[i]-128;
+ }
+ GraphTraceLen=size;
+ RepaintGraphWindow();
+ return;
}
-*/
-
-// by marshmellow
-// not perfect especially with lower clocks or VERY good antennas (heavy wave clipping)
-// maybe somehow adjust peak trimming value based on samples to fix?
-int DetectClock(int peak)
+size_t getFromGraphBuf(uint8_t *buff)
{
- int i=0;
- int low=0;
- int clk[]={16,32,40,50,64,100,128,256};
- if (!peak){
- for (i=0;i<GraphTraceLen;++i){
- if(GraphBuffer[i]>peak){
- peak = GraphBuffer[i];
- }
- if(GraphBuffer[i]<low){
- low = GraphBuffer[i];
- }
- }
- peak=(int)(peak*.75);
- low= (int)(low*.75);
- }
- //int numbits;
- int ii;
- int loopCnt = 256;
- if (GraphTraceLen<loopCnt) loopCnt = GraphTraceLen;
- int clkCnt;
- int tol = 0;
- int bestErr=1000;
- int errCnt[]={0,0,0,0,0,0,0,0};
- // int good;
- for(clkCnt=0; clkCnt<6;++clkCnt){
- if (clk[clkCnt]==32){
- tol=1;
- }else{
- tol=0;
- }
- bestErr=1000;
- for (ii=0; ii<loopCnt; ++ii){
- if ((GraphBuffer[ii]>=peak) || (GraphBuffer[ii]<=low)){
- //numbits=0;
- //good=1;
- errCnt[clkCnt]=0;
- for (i=0; i<((int)(GraphTraceLen/clk[clkCnt])-1); ++i){
- if (GraphBuffer[ii+(i*clk[clkCnt])]>=peak || GraphBuffer[ii+(i*clk[clkCnt])]<=low){
- //numbits++;
- }else if(GraphBuffer[ii+(i*clk[clkCnt])-tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])-tol]<=low){
- }else if(GraphBuffer[ii+(i*clk[clkCnt])+tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])+tol]<=low){
- }else{ //error no peak detected
- //numbits=0;
- //good=0;
- errCnt[clkCnt]++;
- //break;
- }
- }
- if(errCnt[clkCnt]==0) return clk[clkCnt];
- if(errCnt[clkCnt]<bestErr) bestErr=errCnt[clkCnt];
- }
- }
- errCnt[clkCnt]=bestErr;
- }
- int iii=0;
- int best=0;
- for (iii=0; iii<6;++iii){
- if (errCnt[iii]<errCnt[best]){
- best = iii;
- }
- }
- PrintAndLog("clkCnt: %d, ii: %d, i: %d peak: %d, low: %d, errcnt: %d, errCnt64: %d",clkCnt,ii,i,peak,low,errCnt[best],errCnt[4]);
- return clk[best];
+ uint32_t i;
+ for (i=0;i<GraphTraceLen;++i){
+ if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
+ if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
+ buff[i]=(uint8_t)(GraphBuffer[i]+128);
+ }
+ return i;
}
-
-
-/* Get or auto-detect clock rate */
+// Get or auto-detect clock rate
int GetClock(const char *str, int peak, int verbose)
{
- int clock;
-// int clock2;
- sscanf(str, "%i", &clock);
- if (!strcmp(str, ""))
- clock = 0;
-
- /* Auto-detect clock */
- if (!clock)
- {
- clock = DetectClock(peak);
- //clock2 = DetectClock2(peak);
- /* Only print this message if we're not looping something */
- if (!verbose){
- PrintAndLog("Auto-detected clock rate: %d", clock);
- //PrintAndLog("clock2: %d",clock2);
- }
- }
+ int clock;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+
+ // Auto-detect clock
+ if (!clock)
+ {
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(grph);
+ clock = DetectASKClock(grph,size,0);
+ // Only print this message if we're not looping something
+ if (!verbose){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ }
+ }
+
+ return clock;
+}
- return clock;
+int GetNRZpskClock(const char *str, int peak, int verbose)
+{
+ int clock;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+
+ // Auto-detect clock
+ if (!clock)
+ {
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(grph);
+ clock = DetectpskNRZClock(grph,size,0);
+ // Only print this message if we're not looping something
+ if (!verbose){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ }
+ }
+ return clock;
}
projects / proxmark3-svn / blobdiff