//-----------------------------------------------------------------------------
#include <stdio.h>
+#include <stdbool.h>
#include <string.h>
#include "ui.h"
#include "graph.h"
void setGraphBuf(uint8_t *buff, size_t size)
{
- int i=0;
- ClearGraph(0);
- for (; i < size; ++i){
+ if ( buff == NULL ) return;
+
+ uint16_t i = 0;
+ if ( size > MAX_GRAPH_TRACE_LEN )
+ size = MAX_GRAPH_TRACE_LEN;
+ ClearGraph(0);
+ for (; i < size; ++i){
GraphBuffer[i]=buff[i]-128;
- }
- GraphTraceLen=size;
- RepaintGraphWindow();
- return;
+ }
+ GraphTraceLen=size;
+ RepaintGraphWindow();
+ return;
}
size_t getFromGraphBuf(uint8_t *buff)
{
- 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;
+ if (buff == NULL ) return 0;
+ 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;
+}
+
+// A simple test to see if there is any data inside Graphbuffer.
+bool HasGraphData(){
+
+ if ( GraphTraceLen <= 0) {
+ PrintAndLog("No data available, try reading something first");
+ return false;
+ }
+ return true;
+}
+
+// Detect high and lows in Grapbuffer.
+// Only loops the first 256 values.
+void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
+
+ uint8_t loopMax = 255;
+ if ( loopMax > GraphTraceLen)
+ loopMax = GraphTraceLen;
+
+ for (uint8_t i = 0; i < loopMax; ++i) {
+ if (GraphBuffer[i] > *high)
+ *high = GraphBuffer[i];
+ else if (GraphBuffer[i] < *low)
+ *low = GraphBuffer[i];
+ }
+
+ //12% fuzz in case highs and lows aren't clipped
+ if (addFuzz) {
+ *high = (int)(*high * .88);
+ *low = (int)(*low * .88);
+ }
+}
+
+// Get or auto-detect ask clock rate
+int GetAskClock(const char str[], bool printAns, bool verbose)
+{
+ int clock;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+
+ if (clock != 0)
+ return clock;
+ // Auto-detect clock
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(grph);
+ if (size == 0) {
+ if (verbose)
+ PrintAndLog("Failed to copy from graphbuffer");
+ return -1;
+ }
+ DetectASKClock(grph, size, &clock, 20);
+ // Only print this message if we're not looping something
+ if (printAns){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ }
+ return clock;
}
-// Get or auto-detect clock rate
-int GetClock(const char *str, int peak, int verbose)
+
+int GetPskClock(const char str[], bool printAns, bool verbose)
{
- int clock;
- sscanf(str, "%i", &clock);
- if (!strcmp(str, ""))
- clock = 0;
+ int clock;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+ if (clock!=0)
+ return clock;
// 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;
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(grph);
+ if ( size == 0 ) {
+ if (verbose)
+ PrintAndLog("Failed to copy from graphbuffer");
+ return -1;
+ }
+ clock = DetectPSKClock(grph,size,0);
+ // Only print this message if we're not looping something
+ if (printAns){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
+ }
+ return clock;
}
-int GetNRZpskClock(const char *str, int peak, int verbose)
+uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
{
int clock;
sscanf(str, "%i", &clock);
if (!strcmp(str, ""))
clock = 0;
+ if (clock!=0)
+ return clock;
// 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);
- }
+ uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(grph);
+ if ( size == 0 ) {
+ if (verbose)
+ PrintAndLog("Failed to copy from graphbuffer");
+ return -1;
+ }
+ clock = DetectNRZClock(grph, size, 0);
+ // Only print this message if we're not looping something
+ if (printAns){
+ PrintAndLog("Auto-detected clock rate: %d", clock);
}
return clock;
}
+//by marshmellow
+//attempt to detect the field clock and bit clock for FSK
+uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
+{
+ int clock;
+ sscanf(str, "%i", &clock);
+ if (!strcmp(str, ""))
+ clock = 0;
+ if (clock != 0) return (uint8_t)clock;
+
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ size_t size = getFromGraphBuf(BitStream);
+ if (size==0) return 0;
+ uint8_t dummy = 0;
+ uint16_t ans = countFC(BitStream, size, &dummy);
+ if (ans==0) {
+ if (verbose) PrintAndLog("DEBUG: No data found");
+ return 0;
+ }
+ uint8_t fc1, fc2;
+ fc1 = (ans >> 8) & 0xFF;
+ fc2 = ans & 0xFF;
+
+ uint8_t rf1 = detectFSKClk(BitStream, size, fc1, fc2);
+ if (rf1==0) {
+ if (verbose) PrintAndLog("DEBUG: Clock detect error");
+ return 0;
+ }
+ if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
+ if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
+ return rf1;
+ }
+ if (verbose){
+ PrintAndLog("DEBUG: unknown fsk field clock detected");
+ PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
+ }
+ return 0;
+}
projects / proxmark3-svn / blobdiff