+ }
+ WDT_HIT();
+
+ }
+ DbpString("Stopped");
+ if (ledcontrol) LED_A_OFF();
+}
+
+uint32_t bytebits_to_byte(uint8_t* src, int numbits)
+{
+ uint32_t num = 0;
+ for(int i = 0 ; i < numbits ; i++)
+ {
+ num = (num << 1) | (*src);
+ src++;
+ }
+ return num;
+}
+
+void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+ uint8_t *dest = (uint8_t *)BigBuf;
+ size_t size=0, idx=0;
+ uint32_t code=0, code2=0;
+
+ // Configure to go in 125Khz listen mode
+ LFSetupFPGAForADC(95, true);
+
+ while(!BUTTON_PRESS()) {
+ WDT_HIT();
+ if (ledcontrol) LED_A_ON();
+ DoAcquisition125k_internal(-1,true);
+ size = sizeof(BigBuf);
+ //make sure buffer has data
+ if (size < 64) return;
+ //test samples are not just noise
+ uint8_t testMax=0;
+ for(idx=0;idx<64;idx++){
+ if (testMax<dest[idx]) testMax=dest[idx];
+ }
+ idx=0;
+ //if not just noise
+ if (testMax>170){
+ //Dbprintf("testMax: %d",testMax);
+ // FSK demodulator
+ size = fsk_demod(dest, size);
+ // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
+ // 1->0 : fc/8 in sets of 7 (RF/64 / 8 = 8)
+ // 0->1 : fc/10 in sets of 6 (RF/64 / 10 = 6.4)
+ size = aggregate_bits(dest, size, 64, 13, 1); //13 max Consecutive should be ok as most 0s in row should be 10 for init seq - invert bits
+ WDT_HIT();
+ //Index map
+ //0 10 20 30 40 50 60
+ //| | | | | | |
+ //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+ //-----------------------------------------------------------------------------
+ //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
+ //
+ //XSF(version)facility:codeone+codetwo
+ //Handle the data
+ uint8_t sameCardCount=0;
+ uint8_t mask[] = {0,0,0,0,0,0,0,0,0,1};
+ for( idx=0; idx < (size - 74); idx++) {
+ if (sameCardCount>2) break;
+ if ( memcmp(dest + idx, mask, sizeof(mask))==0) {
+ //frame marker found
+ if (!dest[idx+8] && dest[idx+17]==1 && dest[idx+26]==1 && dest[idx+35]==1 && dest[idx+44]==1 && dest[idx+53]==1){
+ //confirmed proper separator bits found
+ if(findone){ //only print binary if we are doing one
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx], dest[idx+1], dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
+ Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
+ }
+ code = bytebits_to_byte(dest+idx,32);
+ code2 = bytebits_to_byte(dest+idx+32,32);
+ short version = bytebits_to_byte(dest+idx+27,8); //14,4
+ uint8_t facilitycode = bytebits_to_byte(dest+idx+19,8) ;
+ uint16_t number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
+
+ Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,facilitycode,number,code,code2);
+ // if we're only looking for one tag
+ if (findone){
+ if (ledcontrol) LED_A_OFF();
+ //LED_A_OFF();
+ return;
+ }
+ sameCardCount++;
projects / proxmark3-svn / blobdiff