cvs.zerfleddert.de Git - proxmark3-svn/blob - 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         // 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 }