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FIX: adding a test to see if we managed to get the correct demodulation from an unknown t55x7 tag.

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By checking if the configuration data (page 0, block 0)  has some settings that must be the same.   think  reserved 7bits, This is a trail and error approach.
But together with setting a manual configuration to read a tag and this automatic verification it will help out alot I think.
This commit is contained in:
iceman1001 2015-03-12 23:04:02 +01:00
parent a8cd503dd5
commit 3e4811c8b7
2 changed files with 38 additions and 15 deletions
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52
client/cmdlft55xx.c
View file

@ -218,45 +218,67 @@ int CmdReadBlk(const char *Cmd)
if (CmdDetectClockRate("f")){ //wave is almost certainly FSK
// FSK
if ( FSKrawDemod("0 0", FALSE))
if ( FSKrawDemod("0 0", FALSE) && test())
printT55xx("FSK");
// FSK inverted
if ( FSKrawDemod("0 1", FALSE))
if ( FSKrawDemod("0 1", FALSE) && test())
printT55xx("FSK inv");
} else {
// ASK/MAN (autoclock, normal, maxerrors 1)
if ( ASKmanDemod("0 0 1", FALSE, FALSE) )
if ( ASKmanDemod("0 0 1", FALSE, FALSE) && test())
printT55xx("ASK/MAN");
// ASK/MAN (autoclock, inverted, maxerrors 1)
if ( ASKmanDemod("0 1 1", FALSE, FALSE) )
if ( ASKmanDemod("0 1 1", FALSE, FALSE) && test())
printT55xx("ASK/MAN Inv");
// NZR (autoclock, normal, maxerrors 1)
if ( NRZrawDemod("0 0 1", FALSE) )
if ( NRZrawDemod("0 0 1", FALSE) && test())
printT55xx("NZR");
// NZR (autoclock, inverted, maxerrors 1)
if ( NRZrawDemod("0 1 1", FALSE) )
if ( NRZrawDemod("0 1 1", FALSE) && test())
printT55xx("NZR inv");
// PSK (autoclock, normal, maxerrors 1)
if (!PSKDemod("0 0 1", FALSE))
if ( PSKDemod("0 0 1", FALSE) && test())
printT55xx("PSK");
// PSK (autoclock, inverted, maxerrors 1)
if (!PSKDemod("0 1 1", FALSE))
if ( PSKDemod("0 1 1", FALSE) && test())
printT55xx("PSK inv");
//PSK2?
// if (!BiphaseRawDecode("0",FALSE))
// if (!BiphaseRawDecode("0",FALSE) && test())
// printT55xx("BIPHASE");
// if (!BiphaseRawDecode("1",FALSE))
// if (!BiphaseRawDecode("1",FALSE) && test())
// printT55xx("BIPHASE inv");
}
return 0;
}
bool test(){
if ( !DemodBufferLen)
return false;
uint8_t si = 1;
uint8_t safer = PackBits(si, 4, DemodBuffer); si += 4;
uint8_t resv = PackBits(si, 7, DemodBuffer); si += 7+3;
uint8_t extend = PackBits(si, 1, DemodBuffer); si += 1;
//PrintAndLog("test: %X %X %X ", safer, resv, extend);
// 2nibble must be zeroed.
if ( resv > 0x00) return FALSE;
if ( safer == 0x6 || safer == 0x9){
if ( extend == 0x00)
return TRUE;
}
if ( resv== 0x00) return TRUE;
return FALSE;
}
void printT55xx(const char *demodStr){
@ -434,7 +456,7 @@ int CmdInfo(const char *Cmd){
uint32_t resv = PackBits(si, 7, bits); si += 7;
uint32_t dbr = PackBits(si, 3, bits); si += 3;
uint32_t extend = PackBits(si, 1, bits); si += 1;
uint32_t datamodulation = PackBits(si, 5, bits); si += 5;
uint32_t datamod = PackBits(si, 5, bits); si += 5;
uint32_t pskcf = PackBits(si, 2, bits); si += 2;
uint32_t aor = PackBits(si, 1, bits); si += 1;
uint32_t otp = PackBits(si, 1, bits); si += 1;
@ -452,14 +474,14 @@ int CmdInfo(const char *Cmd){
PrintAndLog(" reserved : %d", resv);
PrintAndLog(" Data bit rate : %s", GetBitRateStr(dbr));
PrintAndLog(" eXtended mode : %s", (extend) ? "Yes - Warning":"No");
PrintAndLog(" Modulation : %s", GetModulationStr(datamodulation) );
PrintAndLog(" Modulation : %s", GetModulationStr(datamod));
PrintAndLog(" PSK clock freq : %d", pskcf);
PrintAndLog(" AOR - Answer on Request : %s", (aor) ? "Yes":"No");
PrintAndLog(" OTP - One Time Pad : %s", (otp) ? "Yes - Warning":"No" );
PrintAndLog(" Max block : %d", maxblk);
PrintAndLog(" Password mode : %s", (pwd) ? "Yes":"No");
PrintAndLog(" Sequence Start Terminator : %s", (sst) ? "Yes":"No");
PrintAndLog(" Fast Write : %s", (fw) ? "Yes":"No");
PrintAndLog(" Fast Write : %s", (fw) ? "Yes":"No");
PrintAndLog(" Inverse data : %s", (inv) ? "Yes":"No");
PrintAndLog(" POR-Delay : %s", (por) ? "Yes":"No");
PrintAndLog("-------------------------------------------------------------");
@ -543,10 +565,10 @@ char * GetSaferStr(uint32_t id){
sprintf(retStr,"%d",id);
if (id == 6) {
sprintf(retStr,"%d - pasdwd",id);
sprintf(retStr,"%d - passwd",id);
}
if (id == 9 ){
sprintf(retStr,"%d - testmode ",id);
sprintf(retStr,"%d - testmode",id);
}
return buf;

1
client/cmdlft55xx.h
View file

@ -22,4 +22,5 @@ char * GetSaferStr(uint32_t id);
char * GetModulationStr( uint32_t id);
uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bitstream);
void printT55xx(const char *demodStr);
bool test();
#endif