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CHG: revert old fiddeling, I should not touch the HIDflasher.
[proxmark3-svn] / client / ui.c
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1//-----------------------------------------------------------------------------
2// Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
3// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
4//
5// This code is licensed to you under the terms of the GNU GPL, version 2 or,
6// at your option, any later version. See the LICENSE.txt file for the text of
7// the license.
8//-----------------------------------------------------------------------------
9// UI utilities
10//-----------------------------------------------------------------------------
11
12#include "ui.h"
13double CursorScaleFactor;
14int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64;
15int offline;
16int flushAfterWrite = 0;
17extern pthread_mutex_t print_lock;
18
19static char *logfilename = "proxmark3.log";
20
21void PrintAndLog(char *fmt, ...)
22{
23 char *saved_line;
24 int saved_point;
25 va_list argptr, argptr2;
26 static FILE *logfile = NULL;
27 static int logging = 1;
28
29 // lock this section to avoid interlacing prints from different threats
30 pthread_mutex_lock(&print_lock);
31
32 if (logging && !logfile) {
33 logfile = fopen(logfilename, "a");
34 if (!logfile) {
35 fprintf(stderr, "Can't open logfile, logging disabled!\n");
36 logging=0;
37 }
38 }
39
40 int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
41
42 if (need_hack) {
43 saved_point = rl_point;
44 saved_line = rl_copy_text(0, rl_end);
45 rl_save_prompt();
46 rl_replace_line("", 0);
47 rl_redisplay();
48 }
49
50 va_start(argptr, fmt);
51 va_copy(argptr2, argptr);
52 vprintf(fmt, argptr);
53 printf(" "); // cleaning prompt
54 va_end(argptr);
55 printf("\n");
56
57 if (need_hack) {
58 rl_restore_prompt();
59 rl_replace_line(saved_line, 0);
60 rl_point = saved_point;
61 rl_redisplay();
62 free(saved_line);
63 }
64
65 if (logging && logfile) {
66 vfprintf(logfile, fmt, argptr2);
67 fprintf(logfile,"\n");
68 fflush(logfile);
69 }
70 va_end(argptr2);
71
72 if (flushAfterWrite == 1) {
73 fflush(NULL);
74 }
75 //release lock
76 pthread_mutex_unlock(&print_lock);
77}
78
79void SetLogFilename(char *fn) {
80 logfilename = fn;
81}
82
83void iceFsk3(int * data, const size_t len){
84
85 int i,j;
86
87 int * output = (int* ) malloc(sizeof(int) * len);
88 memset(output, 0x00, len);
89 float fc = 0.1125f; // center frequency
90 size_t adjustedLen = len;
91
92 // create very simple low-pass filter to remove images (2nd-order Butterworth)
93 float complex iir_buf[3] = {0,0,0};
94 float b[3] = {0.003621681514929, 0.007243363029857, 0.003621681514929};
95 float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
96
97 float sample = 0; // input sample read from file
98 float complex x_prime = 1.0f; // save sample for estimating frequency
99 float complex x;
100
101 for (i=0; i<adjustedLen; ++i) {
102
103 sample = data[i]+128;
104
105 // remove DC offset and mix to complex baseband
106 x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
107
108 // apply low-pass filter, removing spectral image (IIR using direct-form II)
109 iir_buf[2] = iir_buf[1];
110 iir_buf[1] = iir_buf[0];
111 iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
112 x = b[0]*iir_buf[0] +
113 b[1]*iir_buf[1] +
114 b[2]*iir_buf[2];
115
116 // compute instantaneous frequency by looking at phase difference
117 // between adjacent samples
118 float freq = cargf(x*conjf(x_prime));
119 x_prime = x; // retain this sample for next iteration
120
121 output[i] =(freq > 0)? 10 : -10;
122 }
123
124 // show data
125 for (j=0; j<adjustedLen; ++j)
126 data[j] = output[j];
127
128 CmdLtrim("30");
129 adjustedLen -= 30;
130
131 // zero crossings.
132 for (j=0; j<adjustedLen; ++j){
133 if ( data[j] == 10) break;
134 }
135 int startOne =j;
136
137 for (;j<adjustedLen; ++j){
138 if ( data[j] == -10 ) break;
139 }
140 int stopOne = j-1;
141
142 int fieldlen = stopOne-startOne;
143
144 fieldlen = (fieldlen == 39 || fieldlen == 41)? 40 : fieldlen;
145 fieldlen = (fieldlen == 59 || fieldlen == 51)? 50 : fieldlen;
146 if ( fieldlen != 40 && fieldlen != 50){
147 printf("Detected field Length: %d \n", fieldlen);
148 printf("Can only handle 40 or 50. Aborting...\n");
149 free(output);
150 return;
151 }
152
153 // FSK sequence start == 000111
154 int startPos = 0;
155 for (i =0; i<adjustedLen; ++i){
156 int dec = 0;
157 for ( j = 0; j < 6*fieldlen; ++j){
158 dec += data[i + j];
159 }
160 if (dec == 0) {
161 startPos = i;
162 break;
163 }
164 }
165
166 printf("000111 position: %d \n", startPos);
167
168 startPos += 6*fieldlen+5;
169
170 int bit =0;
171 printf("BINARY\n");
172 printf("R/40 : ");
173 for (i =startPos ; i < adjustedLen; i += 40){
174 bit = data[i]>0 ? 1:0;
175 printf("%d", bit );
176 }
177 printf("\n");
178
179 printf("R/50 : ");
180 for (i =startPos ; i < adjustedLen; i += 50){
181 bit = data[i]>0 ? 1:0;
182 printf("%d", bit ); }
183 printf("\n");
184
185 free(output);
186}
187
188float complex cexpf (float complex Z)
189{
190 float complex Res;
191 double rho = exp (__real__ Z);
192 __real__ Res = rho * cosf(__imag__ Z);
193 __imag__ Res = rho * sinf(__imag__ Z);
194 return Res;
195}
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