// UI utilities
//-----------------------------------------------------------------------------
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <time.h>
-#include <readline/readline.h>
-#include <pthread.h>
-
#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";
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;
}
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);
+ memset(output, 0x00, len);
+ float fc = 0.1125f; // center frequency
+ size_t adjustedLen = len;
- 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];
- }
-
- /* 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;
- }
- }
+ // 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;
-
- /* 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;
-
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
-
- bitStream[bit2idx++] = bit ^ invert;
- }
- }
- /* standard 1/0 bitstream */
- else {
- /* Then detect duration between 2 successive transitions */
- for (bitidx = 1; i < bytelength; i++) {
+ float sample = 0; // input sample read from array
+ float complex x_prime = 1.0f; // save sample for estimating frequency
+ float complex x;
- if (data[i-1] != data[i]) {
- lc = i-lastval;
- lastval = i;
+ for (i=0; i<adjustedLen; ++i) {
- // 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;
- }
- }
- }
- }
- }
- // 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;
+ 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)? 10 : -10;
+ }
+
+ // show data
+ for (j=0; j<adjustedLen; ++j)
+ data[j] = output[j];
+
+ free(output);
}
-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;
}
projects / proxmark3-svn / blobdiff