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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
11 #include <stdio.h>
12 #include <stdbool.h>
13 #include <string.h>
14 #include "ui.h"
15 #include "graph.h"
16 #include "lfdemod.h"
17
18 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
19 int GraphTraceLen;
20
21 /* write a bit to the graph */
22 void AppendGraph(int redraw, int clock, int bit)
23 {
24 int i;
25
26 for (i = 0; i < (int)(clock / 2); ++i)
27 GraphBuffer[GraphTraceLen++] = bit ^ 1;
28
29 for (i = (int)(clock / 2); i < clock; ++i)
30 GraphBuffer[GraphTraceLen++] = bit;
31
32 if (redraw)
33 RepaintGraphWindow();
34 }
35
36 // clear out our graph window
37 int ClearGraph(int redraw)
38 {
39 int gtl = GraphTraceLen;
40 memset(GraphBuffer, 0x00, GraphTraceLen);
41
42 GraphTraceLen = 0;
43
44 if (redraw)
45 RepaintGraphWindow();
46
47 return gtl;
48 }
49
50 // DETECT CLOCK NOW IN LFDEMOD.C
51
52 void setGraphBuf(uint8_t *buff, size_t size)
53 {
54 if ( buff == NULL ) return;
55
56 uint16_t i = 0;
57 if ( size > MAX_GRAPH_TRACE_LEN )
58 size = MAX_GRAPH_TRACE_LEN;
59 ClearGraph(0);
60 for (; i < size; ++i){
61 GraphBuffer[i]=buff[i]-128;
62 }
63 GraphTraceLen=size;
64 RepaintGraphWindow();
65 return;
66 }
67 size_t getFromGraphBuf(uint8_t *buff)
68 {
69 if (buff == NULL ) return 0;
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;
77 }
78
79
80 // Get or auto-detect clock rate
81 int GetClock(const char *str, int peak, int verbose)
82 {
83 int clock;
84 sscanf(str, "%i", &clock);
85 if (!strcmp(str, ""))
86 clock = 0;
87
88 // Auto-detect clock
89 if (!clock)
90 {
91 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
92 size_t size = getFromGraphBuf(grph);
93 if ( size == 0 ) {
94 PrintAndLog("Failed to copy from graphbuffer");
95 return -1;
96 }
97 clock = DetectASKClock(grph,size,0,20);
98 // Only print this message if we're not looping something
99 if (!verbose){
100 PrintAndLog("Auto-detected clock rate: %d", clock);
101 }
102 }
103 return clock;
104 }
105
106 // A simple test to see if there is any data inside Graphbuffer.
107 bool HasGraphData(){
108
109 if ( GraphTraceLen <= 0) {
110 PrintAndLog("No data available, try reading something first");
111 return false;
112 }
113 return true;
114 }
115
116 // Detect high and lows in Grapbuffer.
117 // Only loops the first 256 values.
118 void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
119
120 uint8_t loopMax = 255;
121 if ( loopMax > GraphTraceLen)
122 loopMax = GraphTraceLen;
123
124 for (uint8_t i = 0; i < loopMax; ++i) {
125 if (GraphBuffer[i] > *high)
126 *high = GraphBuffer[i];
127 else if (GraphBuffer[i] < *low)
128 *low = GraphBuffer[i];
129 }
130
131 //12% fuzz in case highs and lows aren't clipped
132 if (addFuzz) {
133 *high = (int)(*high * .88);
134 *low = (int)(*low * .88);
135 }
136 }
137
138 int GetPskClock(const char *str, int peak, int verbose)
139 {
140 int clock;
141 sscanf(str, "%i", &clock);
142 if (!strcmp(str, ""))
143 clock = 0;
144
145 // Auto-detect clock
146 if (!clock)
147 {
148 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
149 size_t size = getFromGraphBuf(grph);
150 if ( size == 0 ) {
151 PrintAndLog("Failed to copy from graphbuffer");
152 return -1;
153 }
154 clock = DetectPSKClock(grph,size,0);
155 // Only print this message if we're not looping something
156 if (!verbose){
157 PrintAndLog("Auto-detected clock rate: %d", clock);
158 }
159 }
160 return clock;
161 }
162
163 int GetNrzClock(const char *str, int peak, int verbose)
164 {
165 int clock;
166 sscanf(str, "%i", &clock);
167 if (!strcmp(str, ""))
168 clock = 0;
169
170 // Auto-detect clock
171 if (!clock)
172 {
173 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
174 size_t size = getFromGraphBuf(grph);
175 if ( size == 0 ) {
176 PrintAndLog("Failed to copy from graphbuffer");
177 return -1;
178 }
179 clock = DetectNRZClock(grph,size,0);
180 // Only print this message if we're not looping something
181 if (!verbose){
182 PrintAndLog("Auto-detected clock rate: %d", clock);
183 }
184 }
185 return clock;
186 }
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