585 lines
18 KiB
Python
585 lines
18 KiB
Python
# Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http:#www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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DUT provides 3 major groups of features:
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* DUT port feature, provide basic open/close/read/write features
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* DUT tools, provide extra methods to control the device, like download and start app
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* DUT expect method, provide features for users to check DUT outputs
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The current design of DUT have 3 classes for one DUT: BaseDUT, DUTPort, DUTTool.
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* BaseDUT class:
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* defines methods DUT port and DUT tool need to overwrite
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* provide the expect methods and some other methods based on DUTPort
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* DUTPort class:
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* inherent from BaseDUT class
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* implements the port features by overwriting port methods defined in BaseDUT
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* DUTTool class:
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* inherent from one of the DUTPort class
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* implements the tools features by overwriting tool methods defined in BaseDUT
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* could add some new methods provided by the tool
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This module implements the BaseDUT class and one of the port class SerialDUT.
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User should implement their DUTTool classes.
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If they using different port then need to implement their DUTPort class as well.
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"""
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import time
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import re
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import threading
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import copy
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import sys
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import functools
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import serial
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from serial.tools import list_ports
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import Utility
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if sys.version_info[0] == 2:
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import Queue as _queue
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else:
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import queue as _queue
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class ExpectTimeout(ValueError):
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""" timeout for expect method """
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pass
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class UnsupportedExpectItem(ValueError):
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""" expect item not supported by the expect method """
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pass
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def _expect_lock(func):
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@functools.wraps(func)
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def handler(self, *args, **kwargs):
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with self.expect_lock:
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ret = func(self, *args, **kwargs)
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return ret
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return handler
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def _decode_data(data):
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""" for python3, if the data is bytes, then decode it to string """
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if isinstance(data, bytes):
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# convert bytes to string
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try:
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data = data.decode("utf-8", "ignore")
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except UnicodeDecodeError:
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data = data.decode("iso8859-1", )
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return data
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class _DataCache(_queue.Queue):
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"""
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Data cache based on Queue. Allow users to process data cache based on bytes instead of Queue."
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"""
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def __init__(self, maxsize=0):
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_queue.Queue.__init__(self, maxsize=maxsize)
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self.data_cache = str()
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def get_data(self, timeout=0):
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"""
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get a copy of data from cache.
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:param timeout: timeout for waiting new queue item
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:return: copy of data cache
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"""
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# make sure timeout is non-negative
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if timeout < 0:
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timeout = 0
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try:
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data = self.get(timeout=timeout)
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self.data_cache += _decode_data(data)
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except _queue.Empty:
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# don't do anything when on update for cache
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pass
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return copy.deepcopy(self.data_cache)
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def flush(self, index=0xFFFFFFFF):
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"""
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flush data from cache.
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:param index: if < 0 then don't do flush, otherwise flush data before index
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:return: None
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"""
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# first add data in queue to cache
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self.get_data()
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if index > 0:
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self.data_cache = self.data_cache[index:]
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class _RecvThread(threading.Thread):
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PERFORMANCE_PATTERN = re.compile(r"\[Performance]\[(\w+)]: ([^\r\n]+)\r?\n")
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def __init__(self, read, data_cache):
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super(_RecvThread, self).__init__()
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self.exit_event = threading.Event()
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self.setDaemon(True)
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self.read = read
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self.data_cache = data_cache
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# cache the last line of recv data for collecting performance
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self._line_cache = str()
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def collect_performance(self, data):
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""" collect performance """
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if data:
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decoded_data = _decode_data(data)
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matches = self.PERFORMANCE_PATTERN.findall(self._line_cache + decoded_data)
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for match in matches:
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Utility.console_log("[Performance][{}]: {}".format(match[0], match[1]),
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color="orange")
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# cache incomplete line to later process
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lines = decoded_data.splitlines(True)
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last_line = lines[-1]
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if last_line[-1] != "\n":
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if len(lines) == 1:
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# only one line and the line is not finished, then append this to cache
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self._line_cache += lines[-1]
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else:
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# more than one line and not finished, replace line cache
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self._line_cache = lines[-1]
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else:
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# line finishes, flush cache
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self._line_cache = str()
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def run(self):
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while not self.exit_event.isSet():
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data = self.read(1000)
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if data:
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self.data_cache.put(data)
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self.collect_performance(data)
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def exit(self):
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self.exit_event.set()
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self.join()
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class BaseDUT(object):
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"""
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:param name: application defined name for port
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:param port: comport name, used to create DUT port
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:param log_file: log file name
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:param app: test app instance
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:param kwargs: extra args for DUT to create ports
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"""
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DEFAULT_EXPECT_TIMEOUT = 5
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def __init__(self, name, port, log_file, app, **kwargs):
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self.expect_lock = threading.Lock()
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self.name = name
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self.port = port
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self.log_file = log_file
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self.app = app
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self.data_cache = _DataCache()
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self.receive_thread = None
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# open and start during init
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self.open()
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def __str__(self):
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return "DUT({}: {})".format(self.name, str(self.port))
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# define for methods need to be overwritten by Port
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@classmethod
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def list_available_ports(cls):
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"""
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list all available ports.
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subclass (port) must overwrite this method.
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:return: list of available comports
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"""
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pass
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def _port_open(self):
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"""
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open the port.
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subclass (port) must overwrite this method.
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:return: None
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"""
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pass
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def _port_read(self, size=1):
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"""
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read form port. This method should not blocking for long time, otherwise receive thread can not exit.
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subclass (port) must overwrite this method.
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:param size: max size to read.
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:return: read data.
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"""
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pass
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def _port_write(self, data):
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"""
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write to port.
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subclass (port) must overwrite this method.
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:param data: data to write
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:return: None
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"""
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pass
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def _port_close(self):
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"""
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close port.
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subclass (port) must overwrite this method.
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:return: None
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"""
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pass
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# methods that need to be overwritten by Tool
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@classmethod
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def confirm_dut(cls, port, app, **kwargs):
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"""
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confirm if it's a DUT, usually used by auto detecting DUT in by Env config.
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subclass (tool) must overwrite this method.
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:param port: comport
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:param app: app instance
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:return: True or False
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"""
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pass
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def start_app(self):
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"""
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usually after we got DUT, we need to do some extra works to let App start.
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For example, we need to reset->download->reset to let IDF application start on DUT.
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subclass (tool) must overwrite this method.
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:return: None
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"""
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pass
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# methods that features raw port methods
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def open(self):
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"""
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open port and create thread to receive data.
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:return: None
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"""
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self._port_open()
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self.receive_thread = _RecvThread(self._port_read, self.data_cache)
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self.receive_thread.start()
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def close(self):
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"""
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close receive thread and then close port.
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:return: None
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"""
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if self.receive_thread:
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self.receive_thread.exit()
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self._port_close()
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def write(self, data, eol="\r\n", flush=True):
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"""
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:param data: data
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:param eol: end of line pattern.
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:param flush: if need to flush received data cache before write data.
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usually we need to flush data before write,
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make sure processing outputs generated by wrote.
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:return: None
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"""
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# do flush before write
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if flush:
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self.data_cache.flush()
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# do write if cache
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if data is not None:
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self._port_write(data + eol if eol else data)
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@_expect_lock
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def read(self, size=0xFFFFFFFF):
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"""
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read(size=0xFFFFFFFF)
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read raw data. NOT suggested to use this method.
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Only use it if expect method doesn't meet your requirement.
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:param size: read size. default read all data
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:return: read data
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"""
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data = self.data_cache.get_data(0)[:size]
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self.data_cache.flush(size)
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return data
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# expect related methods
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@staticmethod
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def _expect_str(data, pattern):
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"""
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protected method. check if string is matched in data cache.
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:param data: data to process
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:param pattern: string
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:return: pattern if match succeed otherwise None
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"""
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index = data.find(pattern)
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if index != -1:
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ret = pattern
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index += len(pattern)
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else:
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ret = None
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return ret, index
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@staticmethod
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def _expect_re(data, pattern):
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"""
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protected method. check if re pattern is matched in data cache
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:param data: data to process
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:param pattern: compiled RegEx pattern
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:return: match groups if match succeed otherwise None
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"""
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ret = None
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match = pattern.search(data)
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if match:
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ret = match.groups()
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index = match.end()
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else:
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index = -1
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return ret, index
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EXPECT_METHOD = [
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[type(re.compile("")), "_expect_re"],
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[str, "_expect_str"],
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]
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def _get_expect_method(self, pattern):
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"""
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protected method. get expect method according to pattern type.
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:param pattern: expect pattern, string or compiled RegEx
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:return: ``_expect_str`` or ``_expect_re``
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"""
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for expect_method in self.EXPECT_METHOD:
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if isinstance(pattern, expect_method[0]):
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method = expect_method[1]
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break
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else:
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raise UnsupportedExpectItem()
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return self.__getattribute__(method)
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@_expect_lock
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def expect(self, pattern, timeout=DEFAULT_EXPECT_TIMEOUT):
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"""
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expect(pattern, timeout=DEFAULT_EXPECT_TIMEOUT)
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expect received data on DUT match the pattern. will raise exception when expect timeout.
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:raise ExpectTimeout: failed to find the pattern before timeout
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:raise UnsupportedExpectItem: pattern is not string or compiled RegEx
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:param pattern: string or compiled RegEx(string pattern)
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:param timeout: timeout for expect
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:return: string if pattern is string; matched groups if pattern is RegEx
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"""
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method = self._get_expect_method(pattern)
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# non-blocking get data for first time
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data = self.data_cache.get_data(0)
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start_time = time.time()
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while True:
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ret, index = method(data, pattern)
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if ret is not None or time.time() - start_time > timeout:
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self.data_cache.flush(index)
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break
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# wait for new data from cache
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data = self.data_cache.get_data(time.time() + timeout - start_time)
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if ret is None:
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raise ExpectTimeout(self.name + ": " + str(pattern))
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return ret
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def _expect_multi(self, expect_all, expect_item_list, timeout):
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"""
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protected method. internal logical for expect multi.
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:param expect_all: True or False, expect all items in the list or any in the list
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:param expect_item_list: expect item list
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:param timeout: timeout
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:return: None
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"""
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def process_expected_item(item_raw):
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# convert item raw data to standard dict
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item = {
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"pattern": item_raw[0] if isinstance(item_raw, tuple) else item_raw,
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"method": self._get_expect_method(item_raw[0] if isinstance(item_raw, tuple)
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else item_raw),
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"callback": item_raw[1] if isinstance(item_raw, tuple) else None,
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"index": -1,
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"ret": None,
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}
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return item
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expect_items = [process_expected_item(x) for x in expect_item_list]
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# non-blocking get data for first time
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data = self.data_cache.get_data(0)
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start_time = time.time()
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matched_expect_items = list()
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while True:
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for expect_item in expect_items:
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if expect_item not in matched_expect_items:
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# exclude those already matched
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expect_item["ret"], expect_item["index"] = \
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expect_item["method"](data, expect_item["pattern"])
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if expect_item["ret"] is not None:
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# match succeed for one item
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matched_expect_items.append(expect_item)
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break
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# if expect all, then all items need to be matched,
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# else only one item need to matched
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if expect_all:
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match_succeed = (matched_expect_items == expect_items)
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else:
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match_succeed = True if matched_expect_items else False
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if time.time() - start_time > timeout or match_succeed:
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break
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else:
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data = self.data_cache.get_data(time.time() + timeout - start_time)
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if match_succeed:
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# do callback and flush matched data cache
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slice_index = -1
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for expect_item in matched_expect_items:
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# trigger callback
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if expect_item["callback"]:
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expect_item["callback"](expect_item["ret"])
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slice_index = max(slice_index, expect_item["index"])
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# flush already matched data
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self.data_cache.flush(slice_index)
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else:
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raise ExpectTimeout(self.name + ": " + str(expect_items))
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@_expect_lock
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def expect_any(self, *expect_items, **timeout):
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"""
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expect_any(*expect_items, timeout=DEFAULT_TIMEOUT)
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expect any of the patterns.
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will call callback (if provided) if pattern match succeed and then return.
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will pass match result to the callback.
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:raise ExpectTimeout: failed to match any one of the expect items before timeout
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:raise UnsupportedExpectItem: pattern in expect_item is not string or compiled RegEx
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:arg expect_items: one or more expect items.
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string, compiled RegEx pattern or (string or RegEx(string pattern), callback)
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:keyword timeout: timeout for expect
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:return: None
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"""
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# to be compatible with python2
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# in python3 we can write f(self, *expect_items, timeout=DEFAULT_TIMEOUT)
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if "timeout" not in timeout:
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timeout["timeout"] = self.DEFAULT_EXPECT_TIMEOUT
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return self._expect_multi(False, expect_items, **timeout)
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@_expect_lock
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def expect_all(self, *expect_items, **timeout):
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"""
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expect_all(*expect_items, timeout=DEFAULT_TIMEOUT)
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expect all of the patterns.
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will call callback (if provided) if all pattern match succeed and then return.
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will pass match result to the callback.
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:raise ExpectTimeout: failed to match all of the expect items before timeout
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:raise UnsupportedExpectItem: pattern in expect_item is not string or compiled RegEx
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:arg expect_items: one or more expect items.
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string, compiled RegEx pattern or (string or RegEx(string pattern), callback)
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:keyword timeout: timeout for expect
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:return: None
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"""
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# to be compatible with python2
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# in python3 we can write f(self, *expect_items, timeout=DEFAULT_TIMEOUT)
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if "timeout" not in timeout:
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timeout["timeout"] = self.DEFAULT_EXPECT_TIMEOUT
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return self._expect_multi(True, expect_items, **timeout)
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class SerialDUT(BaseDUT):
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""" serial with logging received data feature """
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DEFAULT_UART_CONFIG = {
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"baudrate": 115200,
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"bytesize": serial.EIGHTBITS,
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"parity": serial.PARITY_NONE,
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"stopbits": serial.STOPBITS_ONE,
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"timeout": 0.05,
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"xonxoff": False,
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"rtscts": False,
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}
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def __init__(self, name, port, log_file, app, **kwargs):
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self.port_inst = None
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self.serial_configs = self.DEFAULT_UART_CONFIG.copy()
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self.serial_configs.update(kwargs)
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super(SerialDUT, self).__init__(name, port, log_file, app, **kwargs)
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@staticmethod
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def _format_data(data):
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"""
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format data for logging. do decode and add timestamp.
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:param data: raw data from read
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:return: formatted data (str)
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"""
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timestamp = time.time()
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timestamp = "[{}:{}]".format(time.strftime("%m-%d %H:%M:%S", time.localtime(timestamp)),
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str(timestamp % 1)[2:5])
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formatted_data = timestamp.encode() + b"\r\n" + data + b"\r\n"
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return formatted_data
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def _port_open(self):
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self.port_inst = serial.Serial(self.port, **self.serial_configs)
|
|
|
|
def _port_close(self):
|
|
self.port_inst.close()
|
|
|
|
def _port_read(self, size=1):
|
|
data = self.port_inst.read(size)
|
|
if data:
|
|
with open(self.log_file, "ab+") as _log_file:
|
|
_log_file.write(self._format_data(data))
|
|
return data
|
|
|
|
def _port_write(self, data):
|
|
if isinstance(data, str):
|
|
data = data.encode()
|
|
self.port_inst.write(data)
|
|
|
|
@classmethod
|
|
def list_available_ports(cls):
|
|
return [x.device for x in list_ports.comports()]
|