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fix: lf fdx sim - now two pm3 (one sim other read) will detect. Also works against proper verichip reader.

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This commit is contained in:
iceman1001 2019-11-02 18:10:39 +01:00
parent 06076708a7
commit f7256b77f7
1 changed files with 27 additions and 3 deletions
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30
armsrc/lfops.c
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@ -1045,6 +1045,16 @@ static void leadingZeroAskSimBits(int *n, uint8_t clock) {
memset(dest + (*n), 0, clock * 8);
*n += clock * 8;
}
/*
static void leadingZeroBiphaseSimBits(int *n, uint8_t clock, uint8_t *phase) {
uint8_t *dest = BigBuf_get_addr();
for (uint8_t i = 0; i < 8; i++) {
memset(dest + (*n), 0 ^ *phase, clock);
*phase ^= 1;
*n += clock;
}
}
*/
// args clock, ask/man or askraw, invert, transmission separator
@ -1054,10 +1064,14 @@ void CmdASKsimTAG(uint8_t encoding, uint8_t invert, uint8_t separator, uint8_t c
int n = 0, i = 0;
leadingZeroAskSimBits(&n, clk);
if (encoding == 2) { //biphase
uint8_t phase = 0;
// iceman, if I add this, the demod includes these extra zero and detection fails.
// now, I only need to figure out just to add carrier without modulation
// the old bug, with adding ask zeros messed up the phase variable and deteion failed because of it in LF FDX
// leadingZeroBiphaseSimBits(&n, clk, &phase);
for (i = 0; i < size; i++) {
biphaseSimBit(bits[i] ^ invert, &n, clk, &phase);
}
@ -1067,6 +1081,9 @@ void CmdASKsimTAG(uint8_t encoding, uint8_t invert, uint8_t separator, uint8_t c
}
}
} else { // ask/manchester || ask/raw
leadingZeroAskSimBits(&n, clk);
for (i = 0; i < size; i++) {
askSimBit(bits[i] ^ invert, &n, clk, encoding);
}
@ -1083,7 +1100,14 @@ void CmdASKsimTAG(uint8_t encoding, uint8_t invert, uint8_t separator, uint8_t c
WDT_HIT();
Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d", clk, invert, encoding, separator, n);
Dbprintf("Simulating with clk: %d, invert: %d, encoding: %s (%d), separator: %d, n: %d"
, clk
, invert
, (encoding == 2) ? "BI" : (encoding == 1) ? "ASK" : "RAW"
, encoding
, separator
, n
);
if (ledcontrol) LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);