def reset_card(self):
self._con.disconnect()
try:
self._con.connect()
except NoCardException:
raise NoCardError()
return 1
def wait_for_card(self, timeout=None, newcardonly=False): cr = CardRequest(readers=[self._reader], timeout=timeout, newcardonly=newcardonly) try: cr.waitforcard() except CardRequestTimeoutException: raise NoCardError() self.connect()
def connect(self):
try:
# Explicitly select T=0 communication protocol
self._con.connect(CardConnection.T0_protocol)
except CardConnectionException:
raise ProtocolError()
except NoCardException:
raise NoCardError()
def connect(self):
try:
# To avoid leakage of resources, make sure the reader
# is disconnected
self.disconnect()
# Explicitly select T=0 communication protocol
self._con.connect(CardConnection.T0_protocol)
except CardConnectionException:
raise ProtocolError()
except NoCardException:
raise NoCardError()
def wait_for_card(self, timeout=None, newcardonly=False):
# Direct try
existing = False
try:
self.reset_card()
if not newcardonly:
return
else:
existing = True
except NoCardError:
pass
# Poll ...
mt = time.time() + timeout if timeout is not None else None
pe = 0
while (mt is None) or (time.time() < mt):
try:
time.sleep(0.5)
self.reset_card()
if not existing:
return
except NoCardError:
existing = False
except ProtocolError:
if existing:
existing = False
else:
# Tolerate a couple of protocol error ... can happen if
# we try when the card is 'half' inserted
pe += 1
if (pe > 2):
raise
# Timed out ...
raise NoCardError()
def reset_card(self):
rv = self._reset_card()
if rv == 0:
raise NoCardError()
elif rv < 0:
raise ProtocolError()
def connect(self):
try:
self._con.connect()
except NoCardException:
raise NoCardError()
