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a553f267 1//-----------------------------------------------------------------------------
2// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3//
4// This code is licensed to you under the terms of the GNU GPL, version 2 or,
5// at your option, any later version. See the LICENSE.txt file for the text of
6// the license.
7//-----------------------------------------------------------------------------
8// Graph utilities
9//-----------------------------------------------------------------------------
10
7fe9b0b7 11#include <stdio.h>
a1557c4c 12#include <stdbool.h>
7fe9b0b7 13#include <string.h>
14#include "ui.h"
15#include "graph.h"
d5a72d2f 16#include "lfdemod.h"
7fe9b0b7 17
18int GraphBuffer[MAX_GRAPH_TRACE_LEN];
19int GraphTraceLen;
20
abd6112f 21/* write a manchester bit to the graph */
7fe9b0b7 22void AppendGraph(int redraw, int clock, int bit)
23{
24 int i;
abd6112f 25 //set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
7fe9b0b7 26 for (i = 0; i < (int)(clock / 2); ++i)
78f5b1a7 27 GraphBuffer[GraphTraceLen++] = bit ;
abd6112f 28 //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
7fe9b0b7 29 for (i = (int)(clock / 2); i < clock; ++i)
78f5b1a7 30 GraphBuffer[GraphTraceLen++] = bit ^ 1;
7fe9b0b7 31
32 if (redraw)
33 RepaintGraphWindow();
34}
35
c12512e9 36// clear out our graph window
7fe9b0b7 37int ClearGraph(int redraw)
38{
39 int gtl = GraphTraceLen;
52ab55ab 40 memset(GraphBuffer, 0x00, GraphTraceLen);
41
7fe9b0b7 42 GraphTraceLen = 0;
43
44 if (redraw)
45 RepaintGraphWindow();
46
47 return gtl;
48}
49
c12512e9 50// DETECT CLOCK NOW IN LFDEMOD.C
7fe9b0b7 51
ba1a299c 52void setGraphBuf(uint8_t *buff, size_t size)
d5a72d2f 53{
a1557c4c 54 if ( buff == NULL ) return;
55
56 uint16_t i = 0;
57 if ( size > MAX_GRAPH_TRACE_LEN )
58 size = MAX_GRAPH_TRACE_LEN;
b4fb11ba 59 ClearGraph(0);
60 for (; i < size; ++i){
ba1a299c 61 GraphBuffer[i]=buff[i]-128;
b4fb11ba 62 }
63 GraphTraceLen=size;
64 RepaintGraphWindow();
65 return;
d5a72d2f 66}
ba1a299c 67size_t getFromGraphBuf(uint8_t *buff)
d5a72d2f 68{
e770c648 69 if (buff == NULL ) return 0;
b4fb11ba 70 uint32_t i;
71 for (i=0;i<GraphTraceLen;++i){
72 if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
73 if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
74 buff[i]=(uint8_t)(GraphBuffer[i]+128);
75 }
76 return i;
d5a72d2f 77}
ec75f5c1 78
a1557c4c 79// A simple test to see if there is any data inside Graphbuffer.
80bool HasGraphData(){
7fe9b0b7 81
a1557c4c 82 if ( GraphTraceLen <= 0) {
83 PrintAndLog("No data available, try reading something first");
84 return false;
85 }
86 return true;
87}
88
89// Detect high and lows in Grapbuffer.
90// Only loops the first 256 values.
91void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
92
93 uint8_t loopMax = 255;
94 if ( loopMax > GraphTraceLen)
95 loopMax = GraphTraceLen;
96
97 for (uint8_t i = 0; i < loopMax; ++i) {
98 if (GraphBuffer[i] > *high)
99 *high = GraphBuffer[i];
100 else if (GraphBuffer[i] < *low)
101 *low = GraphBuffer[i];
102 }
103
104 //12% fuzz in case highs and lows aren't clipped
105 if (addFuzz) {
106 *high = (int)(*high * .88);
107 *low = (int)(*low * .88);
108 }
7fe9b0b7 109}
ba1a299c 110
f3bf15e4 111// Get or auto-detect ask clock rate
112int GetAskClock(const char str[], bool printAns, bool verbose)
e770c648 113{
114 int clock;
115 sscanf(str, "%i", &clock);
116 if (!strcmp(str, ""))
117 clock = 0;
118
f3bf15e4 119 if (clock != 0)
120 return clock;
e770c648 121 // Auto-detect clock
f3bf15e4 122 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
123 size_t size = getFromGraphBuf(grph);
124 if (size == 0) {
125 if (verbose)
e770c648 126 PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4 127 return -1;
128 }
129 DetectASKClock(grph, size, &clock, 20);
130 // Only print this message if we're not looping something
131 if (printAns){
132 PrintAndLog("Auto-detected clock rate: %d", clock);
e770c648 133 }
134 return clock;
135}
136
872e3d4d 137uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
138{
139 uint8_t carrier=0;
140 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
141 size_t size = getFromGraphBuf(grph);
142 if ( size == 0 ) {
143 if (verbose)
144 PrintAndLog("Failed to copy from graphbuffer");
145 return 0;
146 }
147 //uint8_t countPSK_FC(uint8_t *BitStream, size_t size)
148
149 carrier = countPSK_FC(grph,size);
150 // Only print this message if we're not looping something
151 if (printAns){
152 PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
153 }
154 return carrier;
155}
156
f3bf15e4 157int GetPskClock(const char str[], bool printAns, bool verbose)
158{
159 int clock;
160 sscanf(str, "%i", &clock);
161 if (!strcmp(str, ""))
162 clock = 0;
163
164 if (clock!=0)
165 return clock;
166 // Auto-detect clock
167 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
168 size_t size = getFromGraphBuf(grph);
169 if ( size == 0 ) {
170 if (verbose)
171 PrintAndLog("Failed to copy from graphbuffer");
172 return -1;
173 }
174 clock = DetectPSKClock(grph,size,0);
175 // Only print this message if we're not looping something
176 if (printAns){
177 PrintAndLog("Auto-detected clock rate: %d", clock);
178 }
179 return clock;
180}
181
182uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
4118b74d 183{
ba1a299c 184 int clock;
ba1a299c 185 sscanf(str, "%i", &clock);
186 if (!strcmp(str, ""))
187 clock = 0;
188
f3bf15e4 189 if (clock!=0)
190 return clock;
ba1a299c 191 // Auto-detect clock
f3bf15e4 192 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
193 size_t size = getFromGraphBuf(grph);
194 if ( size == 0 ) {
195 if (verbose)
e629181f 196 PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4 197 return -1;
198 }
199 clock = DetectNRZClock(grph, size, 0);
200 // Only print this message if we're not looping something
201 if (printAns){
202 PrintAndLog("Auto-detected clock rate: %d", clock);
ba1a299c 203 }
204 return clock;
4118b74d 205}
f3bf15e4 206//by marshmellow
207//attempt to detect the field clock and bit clock for FSK
208uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
209{
210 int clock;
211 sscanf(str, "%i", &clock);
212 if (!strcmp(str, ""))
213 clock = 0;
214 if (clock != 0) return (uint8_t)clock;
215
abd6112f 216
217 uint8_t fc1=0, fc2=0, rf1=0;
218 uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
219 if (ans == 0) return 0;
220 if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
221 if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
222 return rf1;
223 }
224 if (verbose){
225 PrintAndLog("DEBUG: unknown fsk field clock detected");
226 PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
227 }
228 return 0;
229}
230uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
231{
f3bf15e4 232 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
233 size_t size = getFromGraphBuf(BitStream);
234 if (size==0) return 0;
235 uint8_t dummy = 0;
236 uint16_t ans = countFC(BitStream, size, &dummy);
237 if (ans==0) {
238 if (verbose) PrintAndLog("DEBUG: No data found");
239 return 0;
240 }
abd6112f 241 *fc1 = (ans >> 8) & 0xFF;
242 *fc2 = ans & 0xFF;
f3bf15e4 243
abd6112f 244 *rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
245 if (*rf1==0) {
f3bf15e4 246 if (verbose) PrintAndLog("DEBUG: Clock detect error");
247 return 0;
248 }
abd6112f 249 return 1;
f3bf15e4 250}
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