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a553f267 1//-----------------------------------------------------------------------------
212ef3a0 2// Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
a553f267 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
7bd30f12 12#include "ui.h"
a47ded5b 13
14// set QT vars
7fe9b0b7 15double CursorScaleFactor;
a47ded5b 16int PlotGridX, PlotGridY, PlotGridXdefault = 64, PlotGridYdefault = 64, CursorCPos = 0, CursorDPos = 0;
17int PlotClock = 0, PlockClockStartIndex = 0;
18
7fe9b0b7 19int offline;
8d0a3e87 20int flushAfterWrite = 0;
9492e0b0 21extern pthread_mutex_t print_lock;
22
7fe9b0b7 23static char *logfilename = "proxmark3.log";
24
25void PrintAndLog(char *fmt, ...)
26{
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27 char *saved_line;
28 int saved_point;
9492e0b0 29 va_list argptr, argptr2;
30 static FILE *logfile = NULL;
8d0a3e87 31 static int logging = 1;
2d3f8e5f 32 // time_t current_time;
33 // struct tm* tm_info;
34 // char buffer[26] = {0};
35
f1202c3f 36 // lock this section to avoid interlacing prints from different threads
9492e0b0 37 pthread_mutex_lock(&print_lock);
38
39 if (logging && !logfile) {
8d0a3e87 40 logfile = fopen(logfilename, "a");
9492e0b0 41 if (!logfile) {
42 fprintf(stderr, "Can't open logfile, logging disabled!\n");
43 logging=0;
44 }
45 }
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46
47 int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
7fe9b0b7 48
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49 if (need_hack) {
50 saved_point = rl_point;
51 saved_line = rl_copy_text(0, rl_end);
52 rl_save_prompt();
53 rl_replace_line("", 0);
54 rl_redisplay();
55 }
56
9492e0b0 57 va_start(argptr, fmt);
58 va_copy(argptr2, argptr);
59 vprintf(fmt, argptr);
60 printf(" "); // cleaning prompt
61 va_end(argptr);
62 printf("\n");
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63
64 if (need_hack) {
65 rl_restore_prompt();
66 rl_replace_line(saved_line, 0);
67 rl_point = saved_point;
68 rl_redisplay();
69 free(saved_line);
70 }
71
9492e0b0 72 if (logging && logfile) {
2d3f8e5f 73
74 /*
75 // Obtain current time.
76 current_time = time(NULL);
77 // Convert to local time format.
78 tm_info = localtime(&current_time);
79 strftime(buffer, 26, "%Y-%m-%d %H:%M:%S", tm_info);
80 fprintf(logfile, "%s ", buffer);
81 */
82
9492e0b0 83 vfprintf(logfile, fmt, argptr2);
84 fprintf(logfile,"\n");
85 fflush(logfile);
86 }
87 va_end(argptr2);
88
8d0a3e87 89 if (flushAfterWrite == 1) {
ed77aabe 90 fflush(NULL);
91 }
9492e0b0 92 //release lock
93 pthread_mutex_unlock(&print_lock);
7fe9b0b7 94}
95
d16b33fe 96void SetLogFilename(char *fn) {
2dcf60f3 97 logfilename = fn;
7fe9b0b7 98}
b44e5233 99
9e43f09a 100void iceIIR_Butterworth(int *data, const size_t len){
7bd30f12 101
102 int i,j;
149aeada 103
104 int * output = (int* ) malloc(sizeof(int) * len);
4c543dbd 105 if ( !output ) return;
106
107 // clear mem
149aeada 108 memset(output, 0x00, len);
081151ea 109
4c543dbd 110 size_t adjustedLen = len;
111 float fc = 0.1125f; // center frequency
112
7bd30f12 113 // create very simple low-pass filter to remove images (2nd-order Butterworth)
114 float complex iir_buf[3] = {0,0,0};
115 float b[3] = {0.003621681514929, 0.007243363029857, 0.003621681514929};
116 float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
117
9e43f09a 118 float sample = 0; // input sample read from array
081151ea 119 float complex x_prime = 1.0f; // save sample for estimating frequency
7bd30f12 120 float complex x;
121
4c543dbd 122 for (i = 0; i < adjustedLen; ++i) {
7bd30f12 123
9e43f09a 124 sample = data[i];
7bd30f12 125
126 // remove DC offset and mix to complex baseband
127 x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
128
129 // apply low-pass filter, removing spectral image (IIR using direct-form II)
130 iir_buf[2] = iir_buf[1];
131 iir_buf[1] = iir_buf[0];
132 iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
133 x = b[0]*iir_buf[0] +
134 b[1]*iir_buf[1] +
135 b[2]*iir_buf[2];
136
137 // compute instantaneous frequency by looking at phase difference
138 // between adjacent samples
139 float freq = cargf(x*conjf(x_prime));
140 x_prime = x; // retain this sample for next iteration
141
4c543dbd 142 output[i] =(freq > 0) ? 127 : -127;
7bd30f12 143 }
144
145 // show data
4c543dbd 146 //memcpy(data, output, adjustedLen);
081151ea 147 for (j=0; j<adjustedLen; ++j)
7bd30f12 148 data[j] = output[j];
4c543dbd 149
149aeada 150 free(output);
7bd30f12 151}
152
4c543dbd 153void iceSimple_Filter(int *data, const size_t len, uint8_t k){
154// ref: http://www.edn.com/design/systems-design/4320010/A-simple-software-lowpass-filter-suits-embedded-system-applications
155// parameter K
156#define FILTER_SHIFT 4
157
158 int32_t filter_reg = 0;
159 int16_t input, output;
160 int8_t shift = (k <=8 ) ? k : FILTER_SHIFT;
161
162 for (int i = 0; i < len; ++i){
163
164 input = data[i];
165 // Update filter with current sample
166 filter_reg = filter_reg - (filter_reg >> shift) + input;
167
168 // Scale output for unity gain
169 output = filter_reg >> shift;
170 data[i] = output;
171 }
172}
173
7bd30f12 174float complex cexpf (float complex Z)
175{
176 float complex Res;
177 double rho = exp (__real__ Z);
178 __real__ Res = rho * cosf(__imag__ Z);
179 __imag__ Res = rho * sinf(__imag__ Z);
180 return Res;
181}
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