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
  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         if ( !output ) return;
  89
  90         // clear mem
  91         memset(output, 0x00, len);
  92
  93         size_t adjustedLen = len;
  94         float fc = 0.1125f;          // center frequency
  95
  96     // create very simple low-pass filter to remove images (2nd-order Butterworth)
  97     float complex iir_buf[3] = {0,0,0};
  98     float b[3] = {0.003621681514929,  0.007243363029857, 0.003621681514929};
  99     float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023};
 100
 101     float sample           = 0;      // input sample read from array
 102     float complex x_prime  = 1.0f;   // save sample for estimating frequency
 103     float complex x;
 104
 105         for (i = 0; i < adjustedLen; ++i) {
 106
 107                 sample = data[i];
 108
 109         // remove DC offset and mix to complex baseband
 110         x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i );
 111
 112         // apply low-pass filter, removing spectral image (IIR using direct-form II)
 113         iir_buf[2] = iir_buf[1];
 114         iir_buf[1] = iir_buf[0];
 115         iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2];
 116         x          = b[0]*iir_buf[0] +
 117                      b[1]*iir_buf[1] +
 118                      b[2]*iir_buf[2];
 119
 120         // compute instantaneous frequency by looking at phase difference
 121         // between adjacent samples
 122         float freq = cargf(x*conjf(x_prime));
 123         x_prime = x;    // retain this sample for next iteration
 124
 125                 output[i] =(freq > 0) ? 127 : -127;
 126     }
 127
 128         // show data
 129         //memcpy(data, output, adjustedLen);
 130         for (j=0; j<adjustedLen; ++j)
 131                 data[j] = output[j];
 132
 133         free(output);
 134 }
 135
 136 void iceSimple_Filter(int *data, const size_t len, uint8_t k){
 137 // ref: http://www.edn.com/design/systems-design/4320010/A-simple-software-lowpass-filter-suits-embedded-system-applications
 138 // parameter K
 139 #define FILTER_SHIFT 4
 140
 141         int32_t filter_reg = 0;
 142         int16_t input, output;
 143         int8_t shift = (k <=8 ) ? k : FILTER_SHIFT;
 144
 145         for (int i = 0; i < len; ++i){
 146
 147                 input = data[i];
 148                 // Update filter with current sample
 149                 filter_reg = filter_reg - (filter_reg >> shift) + input;
 150
 151                 // Scale output for unity gain
 152                 output = filter_reg >> shift;
 153                 data[i] = output;
 154         }
 155 }
 156
 157 float complex cexpf (float complex Z)
 158 {
 159   float complex  Res;
 160   double rho = exp (__real__ Z);
 161   __real__ Res = rho * cosf(__imag__ Z);
 162   __imag__ Res = rho * sinf(__imag__ Z);
 163   return Res;
 164 }