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picopass uses a different CRC algo

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iceman1001 2024-01-16 15:32:43 +01:00
commit acaaeea450
2 changed files with 12 additions and 1 deletions
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9
armsrc/iso14443b.c
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@ -2643,7 +2643,14 @@ void SendRawCommand14443B(iso14b_raw_cmd_t *p) {
if ((p->flags & ISO14B_RAW) == ISO14B_RAW) {
if (((p->flags & ISO14B_APPEND_CRC) == ISO14B_APPEND_CRC) && (p->rawlen)) {
AddCrc14B(p->raw, p->rawlen);
// Picopass uses different CRC algo
// it also excludes the first instruction byte
if ((p->flags & ISO14B_SELECT_PICOPASS) == ISO14B_SELECT_PICOPASS) {
AddCrc15(p->raw + 1, p->rawlen - 1);
} else {
AddCrc14B(p->raw, p->rawlen);
}
p->rawlen += 2;
}