Instruction:
Given the following Python 3 function, write the documentation
def GetStatus(
        self,
        Channel):

        """
          Gets the current status of a PCAN Channel

        Parameters:
          Channel  : A TPCANHandle representing a PCAN Channel

        Returns:
          A TPCANStatus error code
        """
        try:
            res = self.__m_dllBasic.CAN_GetStatus(Channel)
            return TPCANStatus(res)
        except:
            logger.error("Exception on PCANBasic.GetStatus")
            raise

Response: Returns the current status of a PCAN Channel.


Instruction:
Given the following Python 3 function, write the documentation
def Read(
        self,
        Channel):

        """
          Reads a CAN message from the receive queue of a PCAN Channel

        Remarks:
          The return value of this method is a 3-touple, where
          the first value is the result (TPCANStatus) of the method.
          The order of the values are:
          [0]: A TPCANStatus error code
          [1]: A TPCANMsg structure with the CAN message read
          [2]: A TPCANTimestamp structure with the time when a message was read

        Parameters:
          Channel  : A TPCANHandle representing a PCAN Channel

        Returns:
          A touple with three values
        """
        try:
            if platform.system() == 'Darwin':
                msg = TPCANMsgMac()
                timestamp = TPCANTimestampMac()
            else:
                msg = TPCANMsg()
                timestamp = TPCANTimestamp()
            res = self.__m_dllBasic.CAN_Read(Channel,byref(msg),byref(timestamp))
            return TPCANStatus(res),msg,timestamp
        except:
            logger.error("Exception on PCANBasic.Read")
            raise

Response: Reads a CAN message from the receive queue of a PCAN Channel.


Instruction:
Write a Python 3 script to
read a CAN message from the receive queue of a FD capable PCAN Channel.

Response:
def ReadFD(
        self,
        Channel):

        """
          Reads a CAN message from the receive queue of a FD capable PCAN Channel

        Remarks:
          The return value of this method is a 3-touple, where
          the first value is the result (TPCANStatus) of the method.
          The order of the values are:
          [0]: A TPCANStatus error code
          [1]: A TPCANMsgFD structure with the CAN message read
          [2]: A TPCANTimestampFD that is the time when a message was read

        Parameters:
          Channel  : The handle of a FD capable PCAN Channel

        Returns:
          A touple with three values
        """
        try:
            if platform.system() == 'Darwin':
                msg = TPCANMsgFDMac()
            else:
                msg = TPCANMsgFD()
            timestamp = TPCANTimestampFD()
            res = self.__m_dllBasic.CAN_ReadFD(Channel,byref(msg),byref(timestamp))
            return TPCANStatus(res),msg,timestamp
        except:
            logger.error("Exception on PCANBasic.ReadFD")
            raise


Instruction:
Implement a function in Python 3 to
transmit a CAN message to a PCAN Channel and returns a TPCANStatus object.

Response:
def Write(
        self,
        Channel,
        MessageBuffer):

        """
          Transmits a CAN message

        Parameters:
          Channel      : A TPCANHandle representing a PCAN Channel
          MessageBuffer: A TPCANMsg representing the CAN message to be sent

        Returns:
          A TPCANStatus error code
        """
        try:
            res = self.__m_dllBasic.CAN_Write(Channel,byref(MessageBuffer))
            return TPCANStatus(res)
        except:
            logger.error("Exception on PCANBasic.Write")
            raise


Instruction:
Given the following Python 3 function, write the documentation
def WriteFD(
        self,
        Channel,
        MessageBuffer):

        """
          Transmits a CAN message over a FD capable PCAN Channel

        Parameters:
          Channel      : The handle of a FD capable PCAN Channel
          MessageBuffer: A TPCANMsgFD buffer with the message to be sent

        Returns:
          A TPCANStatus error code
        """
        try:
            res = self.__m_dllBasic.CAN_WriteFD(Channel,byref(MessageBuffer))
            return TPCANStatus(res)
        except:
            logger.error("Exception on PCANBasic.WriteFD")
            raise

Response: Transmits a CAN message over a FD capable PCAN Channel and returns a TPCANStatus object.


Instruction:
Here you have a function in Python 3, explain what it does
def FilterMessages(
        self,
        Channel,
        FromID,
        ToID,
        Mode):

        """
          Configures the reception filter

        Remarks:
          The message filter will be expanded with every call to this function.
          If it is desired to reset the filter, please use the 'SetValue' function.

        Parameters:
          Channel : A TPCANHandle representing a PCAN Channel
          FromID  : A c_uint value with the lowest CAN ID to be received
          ToID    : A c_uint value with the highest CAN ID to be received
          Mode    : A TPCANMode representing the message type (Standard, 11-bit
                    identifier, or Extended, 29-bit identifier)

        Returns:
          A TPCANStatus error code
        """
        try:
            res = self.__m_dllBasic.CAN_FilterMessages(Channel,FromID,ToID,Mode)
            return TPCANStatus(res)
        except:
            logger.error("Exception on PCANBasic.FilterMessages")
            raise

Response: This function filters out the messages from a PCAN Channel from a given from ID to ID and mode.


Instruction:
How would you code a function in Python 3 to
retrieve a PCAN Channel value Remarks: Parameters can be present or not according with the kind of Hardware (PCAN Channel) being used. If a parameter is not available, a PCAN_ERROR_ILLPARAMTYPE error will be returned. The return value of this method is a 2-touple, where the first value is the result (TPCANStatus) of the method and the second one, the asked value Parameters: Channel : A TPCANHandle representing a PCAN Channel Parameter : The TPCANParameter parameter to get Returns: A touple with 2 values

Response:
def GetValue(
        self,
        Channel,
        Parameter):

        """
          Retrieves a PCAN Channel value

        Remarks:
          Parameters can be present or not according with the kind
          of Hardware (PCAN Channel) being used. If a parameter is not available,
          a PCAN_ERROR_ILLPARAMTYPE error will be returned.

          The return value of this method is a 2-touple, where
          the first value is the result (TPCANStatus) of the method and
          the second one, the asked value

        Parameters:
          Channel   : A TPCANHandle representing a PCAN Channel
          Parameter : The TPCANParameter parameter to get

        Returns:
          A touple with 2 values
        """
        try:
            if Parameter == PCAN_API_VERSION or Parameter == PCAN_HARDWARE_NAME or Parameter == PCAN_CHANNEL_VERSION or Parameter == PCAN_LOG_LOCATION or Parameter == PCAN_TRACE_LOCATION or Parameter == PCAN_BITRATE_INFO_FD or Parameter == PCAN_IP_ADDRESS:
                mybuffer = create_string_buffer(256)
            else:
                mybuffer = c_int(0)

            res = self.__m_dllBasic.CAN_GetValue(Channel,Parameter,byref(mybuffer),sizeof(mybuffer))
            return TPCANStatus(res),mybuffer.value
        except:
            logger.error("Exception on PCANBasic.GetValue")
            raise


Instruction:
Make a summary of the following Python 3 code
def SetValue(
        self,
        Channel,
        Parameter,
        Buffer):

        """
          Returns a descriptive text of a given TPCANStatus error
          code, in any desired language

        Remarks:
          Parameters can be present or not according with the kind
          of Hardware (PCAN Channel) being used. If a parameter is not available,
          a PCAN_ERROR_ILLPARAMTYPE error will be returned.

        Parameters:
          Channel      : A TPCANHandle representing a PCAN Channel
          Parameter    : The TPCANParameter parameter to set
          Buffer       : Buffer with the value to be set
          BufferLength : Size in bytes of the buffer

        Returns:
          A TPCANStatus error code
        """
        try:
            if Parameter == PCAN_LOG_LOCATION or Parameter == PCAN_LOG_TEXT or Parameter == PCAN_TRACE_LOCATION:
                mybuffer = create_string_buffer(256)
            else:
                mybuffer = c_int(0)

            mybuffer.value = Buffer
            res = self.__m_dllBasic.CAN_SetValue(Channel,Parameter,byref(mybuffer),sizeof(mybuffer))
            return TPCANStatus(res)
        except:
            logger.error("Exception on PCANBasic.SetValue")
            raise

Response: This function sets the value of a given channel in any desired language.


Instruction:
How would you explain what the following Python 3 function does
def GetErrorText(
        self,
        Error,
        Language = 0):

        """
          Configures or sets a PCAN Channel value

        Remarks:

          The current languages available for translation are:
          Neutral (0x00), German (0x07), English (0x09), Spanish (0x0A),
          Italian (0x10) and French (0x0C)

          The return value of this method is a 2-touple, where
          the first value is the result (TPCANStatus) of the method and
          the second one, the error text

        Parameters:
          Error    : A TPCANStatus error code
          Language : Indicates a 'Primary language ID' (Default is Neutral(0))

        Returns:
          A touple with 2 values
        """
        try:
            mybuffer = create_string_buffer(256)
            res = self.__m_dllBasic.CAN_GetErrorText(Error,Language,byref(mybuffer))
            return TPCANStatus(res),mybuffer.value
        except:
            logger.error("Exception on PCANBasic.GetErrorText")
            raise

Response: This method returns the error text of a PCAN Channel.


Instruction:
Given the following Python 3 function, write the documentation
def log_event(self, message, timestamp=None):

        if not message: # if empty or None
            logger.debug("ASCWriter: ignoring empty message")
            return

        # this is the case for the very first message:
        if not self.header_written:
            self.last_timestamp = (timestamp or 0.0)
            self.started = self.last_timestamp
            mlsec = repr(self.last_timestamp).split('.')[1][:3]
            formatted_date = time.strftime(self.FORMAT_DATE.format(mlsec), time.localtime(self.last_timestamp))
            self.file.write("Begin Triggerblock %s\n" % formatted_date)
            self.header_written = True
            self.log_event("Start of measurement") # caution: this is a recursive call!

        # Use last known timestamp if unknown
        if timestamp is None:
            timestamp = self.last_timestamp

        # turn into relative timestamps if necessary
        if timestamp >= self.started:
            timestamp -= self.started

        line = self.FORMAT_EVENT.format(timestamp=timestamp, message=message)
        self.file.write(line)

Response: Add a message to the log file.


Instruction:
How would you explain what the following Python 3 function does
def _detect_available_configs():
        with channels_lock:
            available_channels = list(channels.keys())

        # find a currently unused channel
        get_extra = lambda: "channel-{}".format(randint(0, 9999))
        extra = get_extra()
        while extra in available_channels:
            extra = get_extra()

        available_channels += [extra]

        return [
            {'interface': 'virtual', 'channel': channel}
            for channel in available_channels
        ]

Response: Detects all currently used channels as well as one other currently unused channel.


Instruction:
Can you tell what is the following Python 3 function doing
def message_convert_rx(message_rx):
    is_extended_id = bool(message_rx.flags & IS_ID_TYPE)
    is_remote_frame = bool(message_rx.flags & IS_REMOTE_FRAME)
    is_error_frame = bool(message_rx.flags & IS_ERROR_FRAME)

    return Message(timestamp=message_rx.timestamp,
                   is_remote_frame=is_remote_frame,
                   is_extended_id=is_extended_id,
                   is_error_frame=is_error_frame,
                   arbitration_id=message_rx.id,
                   dlc=message_rx.sizeData,
                   data=message_rx.data[:message_rx.sizeData])

Response: convert the message from the CANAL type to pythoncan type


Instruction:
Implement a Python 3 function for
shutting down the connection to the device safely.

Response:
def shutdown(self):
        """
        Shuts down connection to the device safely.

        :raise cam.CanError: is closing the connection did not work
        """
        status = self.can.close(self.handle)

        if status != CANAL_ERROR_SUCCESS:
            raise CanError("could not shut down bus: status == {}".format(status))


Instruction:
Write a Python 3 function that can
detect available USB2 CAN channels.

Response:
def _detect_available_configs(serial_matcher=None):
        """
        Uses the Windows Management Instrumentation to identify serial devices.

        :param str serial_matcher (optional):
            search string for automatic detection of the device serial
        """
        if serial_matcher:
            channels = find_serial_devices(serial_matcher)
        else:
            channels = find_serial_devices()

        return [{'interface': 'usb2can', 'channel': c} for c in channels]


Instruction:
Can you generate a brief explanation for the following Python 3 code
def _get_class_for_interface(interface):
    # Find the correct backend
    try:
        module_name, class_name = BACKENDS[interface]
    except KeyError:
        raise NotImplementedError("CAN interface '{}' not supported".format(interface))

    # Import the correct interface module
    try:
        module = importlib.import_module(module_name)
    except Exception as e:
        raise ImportError(
            "Cannot import module {} for CAN interface '{}': {}".format(module_name, interface, e)
        )

    # Get the correct class
    try:
        bus_class = getattr(module, class_name)
    except Exception as e:
        raise ImportError(
            "Cannot import class {} from module {} for CAN interface '{}': {}"
                .format(class_name, module_name, interface, e)
        )

    return bus_class

Response: Returns the main bus class for the given interface.