]> git.zerfleddert.de Git - proxmark3-svn/blob - client/ui.c
Merge pull request #13 from k02a/patch-1
[proxmark3-svn] / client / ui.c
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
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
79 void SetLogFilename(char *fn) {
80 logfilename = fn;
81 }
82
83 void iceIIR_Butterworth(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 array
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];
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 free(output);
129 }
130
131 float complex cexpf (float complex Z)
132 {
133 float complex Res;
134 double rho = exp (__real__ Z);
135 __real__ Res = rho * cosf(__imag__ Z);
136 __imag__ Res = rho * sinf(__imag__ Z);
137 return Res;
138 }
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