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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"
13 double CursorScaleFactor;
14 int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64;
15 int offline;
16 int flushAfterWrite = 0;
17 extern pthread_mutex_t print_lock;
18
19 static char *logfilename = "proxmark3.log";
20
21 void 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 // time_t current_time;
29 // struct tm* tm_info;
30 // char buffer[26] = {0};
31
32 // lock this section to avoid interlacing prints from different threats
33 pthread_mutex_lock(&print_lock);
34
35 if (logging && !logfile) {
36 logfile = fopen(logfilename, "a");
37 if (!logfile) {
38 fprintf(stderr, "Can't open logfile, logging disabled!\n");
39 logging=0;
40 }
41 }
42
43 int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
44
45 if (need_hack) {
46 saved_point = rl_point;
47 saved_line = rl_copy_text(0, rl_end);
48 rl_save_prompt();
49 rl_replace_line("", 0);
50 rl_redisplay();
51 }
52
53 va_start(argptr, fmt);
54 va_copy(argptr2, argptr);
55 vprintf(fmt, argptr);
56 printf(" "); // cleaning prompt
57 va_end(argptr);
58 printf("\n");
59
60 if (need_hack) {
61 rl_restore_prompt();
62 rl_replace_line(saved_line, 0);
63 rl_point = saved_point;
64 rl_redisplay();
65 free(saved_line);
66 }
67
68 if (logging && logfile) {
69
70 /*
71 // Obtain current time.
72 current_time = time(NULL);
73 // Convert to local time format.
74 tm_info = localtime(&current_time);
75 strftime(buffer, 26, "%Y-%m-%d %H:%M:%S", tm_info);
76 fprintf(logfile, "%s ", buffer);
77 */
78
79 vfprintf(logfile, fmt, argptr2);
80 fprintf(logfile,"\n");
81 fflush(logfile);
82 }
83 va_end(argptr2);
84
85 if (flushAfterWrite == 1) {
86 fflush(NULL);
87 }
88 //release lock
89 pthread_mutex_unlock(&print_lock);
90 }
91
92 void SetLogFilename(char *fn) {
93 logfilename = fn;
94 }
95
96 void iceIIR_Butterworth(int *data, const size_t len){
97
98 int i,j;
99
100 int * output = (int* ) malloc(sizeof(int) * len);
101 if ( !output ) return;
102
103 // clear mem
104 memset(output, 0x00, len);
105
106 size_t adjustedLen = len;
107 float fc = 0.1125f; // center frequency
108
109 // create very simple low-pass filter to remove images (2nd-order Butterworth)
110 float complex iir_buf[3] = {0,0,0};
111 float b[3] = {0.003621681514929, 0.007243363029857, 0.003621681514929};
112 float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
113
114 float sample = 0; // input sample read from array
115 float complex x_prime = 1.0f; // save sample for estimating frequency
116 float complex x;
117
118 for (i = 0; i < adjustedLen; ++i) {
119
120 sample = data[i];
121
122 // remove DC offset and mix to complex baseband
123 x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
124
125 // apply low-pass filter, removing spectral image (IIR using direct-form II)
126 iir_buf[2] = iir_buf[1];
127 iir_buf[1] = iir_buf[0];
128 iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
129 x = b[0]*iir_buf[0] +
130 b[1]*iir_buf[1] +
131 b[2]*iir_buf[2];
132
133 // compute instantaneous frequency by looking at phase difference
134 // between adjacent samples
135 float freq = cargf(x*conjf(x_prime));
136 x_prime = x; // retain this sample for next iteration
137
138 output[i] =(freq > 0) ? 127 : -127;
139 }
140
141 // show data
142 //memcpy(data, output, adjustedLen);
143 for (j=0; j<adjustedLen; ++j)
144 data[j] = output[j];
145
146 free(output);
147 }
148
149 void iceSimple_Filter(int *data, const size_t len, uint8_t k){
150 // ref: http://www.edn.com/design/systems-design/4320010/A-simple-software-lowpass-filter-suits-embedded-system-applications
151 // parameter K
152 #define FILTER_SHIFT 4
153
154 int32_t filter_reg = 0;
155 int16_t input, output;
156 int8_t shift = (k <=8 ) ? k : FILTER_SHIFT;
157
158 for (int i = 0; i < len; ++i){
159
160 input = data[i];
161 // Update filter with current sample
162 filter_reg = filter_reg - (filter_reg >> shift) + input;
163
164 // Scale output for unity gain
165 output = filter_reg >> shift;
166 data[i] = output;
167 }
168 }
169
170 float complex cexpf (float complex Z)
171 {
172 float complex Res;
173 double rho = exp (__real__ Z);
174 __real__ Res = rho * cosf(__imag__ Z);
175 __imag__ Res = rho * sinf(__imag__ Z);
176 return Res;
177 }
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