mirror of https://github.com/ARMmbed/mbed-os.git
136 lines
4.3 KiB
Python
136 lines
4.3 KiB
Python
"""
|
|
Copyright (c) 2017, Arm Limited and affiliates.
|
|
SPDX-License-Identifier: Apache-2.0
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
"""
|
|
|
|
import time
|
|
import nfc
|
|
from nfc.clf import RemoteTarget
|
|
import logging
|
|
|
|
logprefixnfc = "NFCPY: "
|
|
|
|
"""
|
|
Wrap calls to nfcpi testing module, handle loading the driver
|
|
"""
|
|
|
|
|
|
def command_is(string, command):
|
|
return string.split(' ')[0] == command
|
|
|
|
|
|
def debug_nfc_data(key, value):
|
|
"""
|
|
print useful data values for the host/user {{in between}} easy to spot brackets.
|
|
"""
|
|
text = "{{%s=%s}}" % (key, value)
|
|
logger.info(text)
|
|
|
|
|
|
logging.basicConfig(level=logging.DEBUG) # read commandline value?
|
|
logger = logging.getLogger()
|
|
|
|
|
|
class NfcWrapper:
|
|
"""
|
|
Finds the NFC reader USB front-end and prepares it for use.
|
|
"""
|
|
def __init__(self):
|
|
# will need a parameter here to help with libusb detection?
|
|
# clf.open("usb:04e6:5591") will open the SCL3711-NFC
|
|
logger.info("Initializing the NFC tag reader...")
|
|
self.clf = nfc.ContactlessFrontend()
|
|
if (self.clf.open("usb") ): # the NFC reader was not detected on any USB port!
|
|
logger.info("NFC Frontend found OK")
|
|
else:
|
|
logger.error("The NFC reader was not detected on any USB port!")
|
|
self.clfResponse = None
|
|
|
|
def clf_response(self):
|
|
return self.clfResponse
|
|
|
|
def parse(self,line):
|
|
logging.debug(line)
|
|
parseok = False
|
|
# find command and call the needed nfcWrapper method
|
|
if command_is(line, "ping"):
|
|
self.pong()
|
|
parseok = True
|
|
if command_is(line, "connect"):
|
|
detectedTag = self.connect()
|
|
debug_nfc_data("Connectedtag", detectedTag)
|
|
parseok = True
|
|
if command_is(line, "mute"):
|
|
detectedTag = self.mute()
|
|
parseok = True
|
|
if command_is(line, "disconnect"):
|
|
self.disconnect()
|
|
parseok = True
|
|
return parseok
|
|
|
|
"""return the detected tag, else timeout after interval"""
|
|
def sense(self, target_options = ("106A","106B","212F")):
|
|
logging.info(logprefixnfc + "detecting tags with options " + target_options)
|
|
# todo filter using the target_options
|
|
targets = self.clf.sense(RemoteTarget('106A'), RemoteTarget('106B'), RemoteTarget('212F'))
|
|
self.clfResponse = targets
|
|
return targets
|
|
|
|
def connect(self, target_options = ("106A","106B","212F")):
|
|
# todo: decide on tag types to allow/filter
|
|
after5s = lambda: time.time() - started > 5
|
|
started = time.time()
|
|
tag = self.clf.connect( rdwr={'on-connect': lambda tag: False},
|
|
llcp={}, terminate = after5s)
|
|
self.clfResponse = tag
|
|
if tag: # None if timeout expires
|
|
logging.info(logprefixnfc + str(tag))
|
|
return tag
|
|
|
|
def mute(self):
|
|
"""turn off the reader radio"""
|
|
if self.clf.device:
|
|
logging.info(logprefixnfc + "radio mute" + self.clf.device.product_name)
|
|
self.clf.device.mute()
|
|
|
|
def disconnect(self):
|
|
logging.info(logprefixnfc + "close frontend.")
|
|
self.clf.close()
|
|
|
|
"""
|
|
Handle interactions with the NFC reader, and singleton
|
|
"""
|
|
class ContactlessCommandRunner():
|
|
|
|
"""
|
|
Lazy initialization singleton to open the reader once only - else when the framework scans for
|
|
tests, it causes us to open the reader. This breaks the Windows driver.
|
|
"""
|
|
def __getattr__(self, name):
|
|
if name == 'nfc':
|
|
|
|
if ContactlessCommandRunner.__nfc_wrapper is None:
|
|
ContactlessCommandRunner.__nfc_wrapper = NfcWrapper()
|
|
return ContactlessCommandRunner.__nfc_wrapper
|
|
|
|
__nfc_wrapper = None
|
|
|
|
# plumbing, calls a static instance for the reader object.
|
|
def parse(self, line):
|
|
return self.nfc.parse(line)
|
|
|
|
def clf_response(self):
|
|
return self.nfc.clf_response()
|