def select_card(
mf_reader: MFRC522,
uid,
):
cl = 1
# Select the scanned tag
(status, sak) = mf_reader.MFRC522_SelectTag(uid)
if status != mf_reader.MI_OK:
print('SelectTag error')
return False, None
if sak & CASCADE_BIT:
cl = 2
if uid[0] != 0x88:
print('WARNING: Cascade bit set but CT != 0x88!')
# We have to do the anti-collision for cascade level 2
(status, uid2) = mf_reader.MFRC522_Anticoll(1)
# If we have the UID, continue
if status == mf_reader.MI_OK:
uid += uid2
# Select tag using UID2.
(status, sak2) = mf_reader.MFRC522_SelectTag(uid2, 1)
if status != mf_reader.MI_OK:
print('SelectTag2 error')
return False, None
sak = sak2
if sak2 & CASCADE_BIT:
cl = 3
if uid2[0] != 0x88:
print('WARNING: Cascade bit set but CT != 0x88!')
# We have to do the anti-collision for cascade level 3
(status, uid3) = mf_reader.MFRC522_Anticoll(2)
if status == mf_reader.MI_OK:
uid += uid3
# Select tag using UID2.
(status, sak3) = mf_reader.MFRC522_SelectTag(uid3, 2)
if status != mf_reader.MI_OK:
print('SelectTag3 error')
return False, None
sak = sak3
return True, (uid, cl, sak)
def anticol(mf_reader: MFRC522, print_info=True, wakeup=False, no_rats=False):
# Scan for cards
(status, atqa, _) = mf_reader.MFRC522_Request(
mf_reader.PICC_WUPA if wakeup else mf_reader.PICC_REQA)
if status == mf_reader.MI_OK:
# Get the UID of the card
(status, uid) = mf_reader.MFRC522_Anticoll()
# If we have the UID, continue
if status == mf_reader.MI_OK:
(success, card_info) = select_card(mf_reader, uid)
if not success:
return False, None
(uid, cl, sak) = card_info
ats = None
iso_ats_supported = sak & SAK_FLAG_ATS_SUPPORTED
if not no_rats and iso_ats_supported:
status, ats = mf_reader.MFRC522_RequestATS()
if status != mf_reader.MI_OK:
print('WARNING: ATS request failed')
if cl == 1:
cascade_uid = uid[0:4]
elif cl == 2:
cascade_uid = uid[1:4] + uid[5:9]
elif cl == 3:
cascade_uid = uid[1:4] + uid[6:9] + uid[10:]
if print_info:
print('\nFound tag with')
print_hex(' UID: ', cascade_uid)
print('ATQA: %02x%02x\n SAK: %02x\n' % (atqa[1], atqa[0], sak))
if ats is not None and len(ats) > 1:
print_hex(' ATS: ', ats)
return True, (cascade_uid, sak, atqa, ats)
return False, None
