X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/76c7e6c36368c3fc23dc4fab1fe5852023c78fac..62577a62ae4726ed57a8d6d1e65ce8c1a2c77211:/client/ui.c diff --git a/client/ui.c b/client/ui.c index 6486d524..cfaec6a5 100644 --- a/client/ui.c +++ b/client/ui.c @@ -9,19 +9,11 @@ // UI utilities //----------------------------------------------------------------------------- -#include -#include -#include -#include -#include -#include - #include "ui.h" - double CursorScaleFactor; int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64; int offline; -int flushAfterWrite = 0; //buzzy +int flushAfterWrite = 0; extern pthread_mutex_t print_lock; static char *logfilename = "proxmark3.log"; @@ -32,13 +24,13 @@ void PrintAndLog(char *fmt, ...) int saved_point; va_list argptr, argptr2; static FILE *logfile = NULL; - static int logging=1; + static int logging = 1; // lock this section to avoid interlacing prints from different threats pthread_mutex_lock(&print_lock); if (logging && !logfile) { - logfile=fopen(logfilename, "a"); + logfile = fopen(logfilename, "a"); if (!logfile) { fprintf(stderr, "Can't open logfile, logging disabled!\n"); logging=0; @@ -77,208 +69,96 @@ void PrintAndLog(char *fmt, ...) } va_end(argptr2); - if (flushAfterWrite == 1) //buzzy - { + if (flushAfterWrite == 1) { fflush(NULL); } //release lock pthread_mutex_unlock(&print_lock); } - -void SetLogFilename(char *fn) -{ +void SetLogFilename(char *fn) { logfilename = fn; } + +void iceIIR_Butterworth(int *data, const size_t len){ - -uint8_t manchester_decode(const uint8_t * data, const size_t len, uint8_t * dataout){ - - size_t bytelength = len; + int i,j; - uint8_t bitStream[bytelength]; - memset(bitStream, 0x00, bytelength); + int * output = (int* ) malloc(sizeof(int) * len); + if ( !output ) return; - int clock,high, low, bit, hithigh, hitlow, first, bit2idx, lastpeak; - int i,invert, lastval; - int bitidx = 0; - int lc = 0; - int warnings = 0; - high = 1; - low = bit = bit2idx = lastpeak = invert = lastval = hithigh = hitlow = first = 0; - clock = 0xFFFF; - - /* Detect high and lows */ - for (i = 0; i < bytelength; i++) { - if (data[i] > high) - high = data[i]; - else if (data[i] < low) - low = data[i]; - } + // clear mem + memset(output, 0x00, len); - /* get clock */ - int j=0; - for (i = 1; i < bytelength; i++) { - /* if this is the beginning of a peak */ - j = i-1; - if ( data[j] != data[i] && - data[i] == high) - { - /* find lowest difference between peaks */ - if (lastpeak && i - lastpeak < clock) - clock = i - lastpeak; - lastpeak = i; - } - } + size_t adjustedLen = len; + float fc = 0.1125f; // center frequency + + // create very simple low-pass filter to remove images (2nd-order Butterworth) + float complex iir_buf[3] = {0,0,0}; + float b[3] = {0.003621681514929, 0.007243363029857, 0.003621681514929}; + float a[3] = {1.000000000000000, -1.822694925196308, 0.837181651256023}; - int tolerance = clock/4; - PrintAndLog(" Detected clock: %d",clock); - - /* Detect first transition */ - /* Lo-Hi (arbitrary) */ - /* skip to the first high */ - for (i= 0; i < bytelength; i++) - if (data[i] == high) - break; - - /* now look for the first low */ - for (; i < bytelength; i++) { - if (data[i] == low) { - lastval = i; - break; - } - } - - /* If we're not working with 1/0s, demod based off clock */ - if (high != 1) - { - bit = 0; /* We assume the 1st bit is zero, it may not be - * the case: this routine (I think) has an init problem. - * Ed. - */ - for (; i < (int)(bytelength / clock); i++) - { - hithigh = 0; - hitlow = 0; - first = 1; + float sample = 0; // input sample read from array + float complex x_prime = 1.0f; // save sample for estimating frequency + float complex x; + + for (i = 0; i < adjustedLen; ++i) { - /* Find out if we hit both high and low peaks */ - for (j = 0; j < clock; j++) - { - if (data[(i * clock) + j] == high) - hithigh = 1; - else if (data[(i * clock) + j] == low) - hitlow = 1; + sample = data[i]; + + // remove DC offset and mix to complex baseband + x = (sample - 127.5f) * cexpf( _Complex_I * 2 * M_PI * fc * i ); + + // apply low-pass filter, removing spectral image (IIR using direct-form II) + iir_buf[2] = iir_buf[1]; + iir_buf[1] = iir_buf[0]; + iir_buf[0] = x - a[1]*iir_buf[1] - a[2]*iir_buf[2]; + x = b[0]*iir_buf[0] + + b[1]*iir_buf[1] + + b[2]*iir_buf[2]; + + // compute instantaneous frequency by looking at phase difference + // between adjacent samples + float freq = cargf(x*conjf(x_prime)); + x_prime = x; // retain this sample for next iteration + + output[i] =(freq > 0) ? 127 : -127; + } + + // show data + //memcpy(data, output, adjustedLen); + for (j=0; j> shift) + input; - // Error check: if bitidx becomes too large, we do not - // have a Manchester encoded bitstream or the clock is really - // wrong! - if (bitidx > (bytelength*2/clock+8) ) { - PrintAndLog("Error: the clock you gave is probably wrong, aborting."); - return 0; - } - // Then switch depending on lc length: - // Tolerance is 1/4 of clock rate (arbitrary) - if (abs(lc-clock/2) < tolerance) { - // Short pulse : either "1" or "0" - bitStream[bitidx++] = data[i-1]; - } else if (abs(lc-clock) < tolerance) { - // Long pulse: either "11" or "00" - bitStream[bitidx++] = data[i-1]; - bitStream[bitidx++] = data[i-1]; - } else { - // Error - warnings++; - PrintAndLog("Warning: Manchester decode error for pulse width detection."); - if (warnings > 10) { - PrintAndLog("Error: too many detection errors, aborting."); - return 0; - } - } - } - } + // Scale output for unity gain + output = filter_reg >> shift; + data[i] = output; } - // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream - // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful - // to stop output at the final bitidx2 value, not bitidx - for (i = 0; i < bitidx; i += 2) { - if ((bitStream[i] == 0) && (bitStream[i+1] == 1)) { - bitStream[bit2idx++] = 1 ^ invert; - } - else if ((bitStream[i] == 1) && (bitStream[i+1] == 0)) { - bitStream[bit2idx++] = 0 ^ invert; - } - else { - // We cannot end up in this state, this means we are unsynchronized, - // move up 1 bit: - i++; - warnings++; - PrintAndLog("Unsynchronized, resync..."); - if (warnings > 10) { - PrintAndLog("Error: too many decode errors, aborting."); - return 0; - } - } - } - - // PrintAndLog(" Manchester decoded bitstream : %d bits", (bit2idx-16)); - // uint8_t mod = (bit2idx-16) % blocksize; - // uint8_t div = (bit2idx-16) / blocksize; - - // // Now output the bitstream to the scrollback by line of 16 bits - // for (i = 0; i < div*blocksize; i+=blocksize) { - // PrintAndLog(" %s", sprint_bin(bitStream+i,blocksize) ); - // } - // if ( mod > 0 ){ - // PrintAndLog(" %s", sprint_bin(bitStream+i, mod) ); - // } - - if ( bit2idx > 0 ) - memcpy(dataout, bitStream, bit2idx); - - free(bitStream); - return bit2idx; } -void PrintPaddedManchester( uint8_t* bitStream, size_t len, size_t blocksize){ - - PrintAndLog(" Manchester decoded bitstream : %d bits", len); - - uint8_t mod = len % blocksize; - uint8_t div = len / blocksize; - int i; - // Now output the bitstream to the scrollback by line of 16 bits - for (i = 0; i < div*blocksize; i+=blocksize) { - PrintAndLog(" %s", sprint_bin(bitStream+i,blocksize) ); - } - if ( mod > 0 ){ - PrintAndLog(" %s", sprint_bin(bitStream+i, mod) ); - } +float complex cexpf (float complex Z) +{ + float complex Res; + double rho = exp (__real__ Z); + __real__ Res = rho * cosf(__imag__ Z); + __imag__ Res = rho * sinf(__imag__ Z); + return Res; }