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# PCANBasic.py
#
# ~~~~~~~~~~~~
#
# PCAN-Basic API
#
# ~~~~~~~~~~~~
#
# ------------------------------------------------------------------
# Author : Keneth Wagner
# Last change: 2022-07-06
# ------------------------------------------------------------------
#
# Copyright (C) 1999-2022 PEAK-System Technik GmbH, Darmstadt
# more Info at http://www.peak-system.com
# Module Imports
import logging
import platform
from ctypes import *
from ctypes.util import find_library
PLATFORM = platform.system()
IS_WINDOWS = PLATFORM == "Windows"
IS_LINUX = PLATFORM == "Linux"
logger = logging.getLogger("can.pcan")
# ///////////////////////////////////////////////////////////
# Type definitions
# ///////////////////////////////////////////////////////////
TPCANHandle = c_ushort # Represents a PCAN hardware channel handle
TPCANStatus = int # Represents a PCAN status/error code
TPCANParameter = c_ubyte # Represents a PCAN parameter to be read or set
TPCANDevice = c_ubyte # Represents a PCAN device
TPCANMessageType = c_ubyte # Represents the type of a PCAN message
TPCANType = c_ubyte # Represents the type of PCAN hardware to be initialized
TPCANMode = c_ubyte # Represents a PCAN filter mode
TPCANBaudrate = c_ushort # Represents a PCAN Baud rate register value
TPCANBitrateFD = c_char_p # Represents a PCAN-FD bit rate string
TPCANTimestampFD = c_ulonglong # Represents a timestamp of a received PCAN FD message
# ///////////////////////////////////////////////////////////
# Value definitions
# ///////////////////////////////////////////////////////////
# Currently defined and supported PCAN channels
#
PCAN_NONEBUS = TPCANHandle(0x00) # Undefined/default value for a PCAN bus
PCAN_ISABUS1 = TPCANHandle(0x21) # PCAN-ISA interface, channel 1
PCAN_ISABUS2 = TPCANHandle(0x22) # PCAN-ISA interface, channel 2
PCAN_ISABUS3 = TPCANHandle(0x23) # PCAN-ISA interface, channel 3
PCAN_ISABUS4 = TPCANHandle(0x24) # PCAN-ISA interface, channel 4
PCAN_ISABUS5 = TPCANHandle(0x25) # PCAN-ISA interface, channel 5
PCAN_ISABUS6 = TPCANHandle(0x26) # PCAN-ISA interface, channel 6
PCAN_ISABUS7 = TPCANHandle(0x27) # PCAN-ISA interface, channel 7
PCAN_ISABUS8 = TPCANHandle(0x28) # PCAN-ISA interface, channel 8
PCAN_DNGBUS1 = TPCANHandle(0x31) # PCAN-Dongle/LPT interface, channel 1
PCAN_PCIBUS1 = TPCANHandle(0x41) # PCAN-PCI interface, channel 1
PCAN_PCIBUS2 = TPCANHandle(0x42) # PCAN-PCI interface, channel 2
PCAN_PCIBUS3 = TPCANHandle(0x43) # PCAN-PCI interface, channel 3
PCAN_PCIBUS4 = TPCANHandle(0x44) # PCAN-PCI interface, channel 4
PCAN_PCIBUS5 = TPCANHandle(0x45) # PCAN-PCI interface, channel 5
PCAN_PCIBUS6 = TPCANHandle(0x46) # PCAN-PCI interface, channel 6
PCAN_PCIBUS7 = TPCANHandle(0x47) # PCAN-PCI interface, channel 7
PCAN_PCIBUS8 = TPCANHandle(0x48) # PCAN-PCI interface, channel 8
PCAN_PCIBUS9 = TPCANHandle(0x409) # PCAN-PCI interface, channel 9
PCAN_PCIBUS10 = TPCANHandle(0x40A) # PCAN-PCI interface, channel 10
PCAN_PCIBUS11 = TPCANHandle(0x40B) # PCAN-PCI interface, channel 11
PCAN_PCIBUS12 = TPCANHandle(0x40C) # PCAN-PCI interface, channel 12
PCAN_PCIBUS13 = TPCANHandle(0x40D) # PCAN-PCI interface, channel 13
PCAN_PCIBUS14 = TPCANHandle(0x40E) # PCAN-PCI interface, channel 14
PCAN_PCIBUS15 = TPCANHandle(0x40F) # PCAN-PCI interface, channel 15
PCAN_PCIBUS16 = TPCANHandle(0x410) # PCAN-PCI interface, channel 16
PCAN_USBBUS1 = TPCANHandle(0x51) # PCAN-USB interface, channel 1
PCAN_USBBUS2 = TPCANHandle(0x52) # PCAN-USB interface, channel 2
PCAN_USBBUS3 = TPCANHandle(0x53) # PCAN-USB interface, channel 3
PCAN_USBBUS4 = TPCANHandle(0x54) # PCAN-USB interface, channel 4
PCAN_USBBUS5 = TPCANHandle(0x55) # PCAN-USB interface, channel 5
PCAN_USBBUS6 = TPCANHandle(0x56) # PCAN-USB interface, channel 6
PCAN_USBBUS7 = TPCANHandle(0x57) # PCAN-USB interface, channel 7
PCAN_USBBUS8 = TPCANHandle(0x58) # PCAN-USB interface, channel 8
PCAN_USBBUS9 = TPCANHandle(0x509) # PCAN-USB interface, channel 9
PCAN_USBBUS10 = TPCANHandle(0x50A) # PCAN-USB interface, channel 10
PCAN_USBBUS11 = TPCANHandle(0x50B) # PCAN-USB interface, channel 11
PCAN_USBBUS12 = TPCANHandle(0x50C) # PCAN-USB interface, channel 12
PCAN_USBBUS13 = TPCANHandle(0x50D) # PCAN-USB interface, channel 13
PCAN_USBBUS14 = TPCANHandle(0x50E) # PCAN-USB interface, channel 14
PCAN_USBBUS15 = TPCANHandle(0x50F) # PCAN-USB interface, channel 15
PCAN_USBBUS16 = TPCANHandle(0x510) # PCAN-USB interface, channel 16
PCAN_PCCBUS1 = TPCANHandle(0x61) # PCAN-PC Card interface, channel 1
PCAN_PCCBUS2 = TPCANHandle(0x62) # PCAN-PC Card interface, channel 2
PCAN_LANBUS1 = TPCANHandle(0x801) # PCAN-LAN interface, channel 1
PCAN_LANBUS2 = TPCANHandle(0x802) # PCAN-LAN interface, channel 2
PCAN_LANBUS3 = TPCANHandle(0x803) # PCAN-LAN interface, channel 3
PCAN_LANBUS4 = TPCANHandle(0x804) # PCAN-LAN interface, channel 4
PCAN_LANBUS5 = TPCANHandle(0x805) # PCAN-LAN interface, channel 5
PCAN_LANBUS6 = TPCANHandle(0x806) # PCAN-LAN interface, channel 6
PCAN_LANBUS7 = TPCANHandle(0x807) # PCAN-LAN interface, channel 7
PCAN_LANBUS8 = TPCANHandle(0x808) # PCAN-LAN interface, channel 8
PCAN_LANBUS9 = TPCANHandle(0x809) # PCAN-LAN interface, channel 9
PCAN_LANBUS10 = TPCANHandle(0x80A) # PCAN-LAN interface, channel 10
PCAN_LANBUS11 = TPCANHandle(0x80B) # PCAN-LAN interface, channel 11
PCAN_LANBUS12 = TPCANHandle(0x80C) # PCAN-LAN interface, channel 12
PCAN_LANBUS13 = TPCANHandle(0x80D) # PCAN-LAN interface, channel 13
PCAN_LANBUS14 = TPCANHandle(0x80E) # PCAN-LAN interface, channel 14
PCAN_LANBUS15 = TPCANHandle(0x80F) # PCAN-LAN interface, channel 15
PCAN_LANBUS16 = TPCANHandle(0x810) # PCAN-LAN interface, channel 16
# Represent the PCAN error and status codes
#
PCAN_ERROR_OK = TPCANStatus(0x00000) # No error
PCAN_ERROR_XMTFULL = TPCANStatus(0x00001) # Transmit buffer in CAN controller is full
PCAN_ERROR_OVERRUN = TPCANStatus(0x00002) # CAN controller was read too late
PCAN_ERROR_BUSLIGHT = TPCANStatus(
0x00004
) # Bus error: an error counter reached the 'light' limit
PCAN_ERROR_BUSHEAVY = TPCANStatus(
0x00008
) # Bus error: an error counter reached the 'heavy' limit
PCAN_ERROR_BUSWARNING = TPCANStatus(
PCAN_ERROR_BUSHEAVY
) # Bus error: an error counter reached the 'warning' limit
PCAN_ERROR_BUSPASSIVE = TPCANStatus(
0x40000
) # Bus error: the CAN controller is error passive
PCAN_ERROR_BUSOFF = TPCANStatus(
0x00010
) # Bus error: the CAN controller is in bus-off state
PCAN_ERROR_ANYBUSERR = TPCANStatus(
PCAN_ERROR_BUSWARNING
| PCAN_ERROR_BUSLIGHT
| PCAN_ERROR_BUSHEAVY
| PCAN_ERROR_BUSOFF
| PCAN_ERROR_BUSPASSIVE
) # Mask for all bus errors
PCAN_ERROR_QRCVEMPTY = TPCANStatus(0x00020) # Receive queue is empty
PCAN_ERROR_QOVERRUN = TPCANStatus(0x00040) # Receive queue was read too late
PCAN_ERROR_QXMTFULL = TPCANStatus(0x00080) # Transmit queue is full
PCAN_ERROR_REGTEST = TPCANStatus(
0x00100
) # Test of the CAN controller hardware registers failed (no hardware found)
PCAN_ERROR_NODRIVER = TPCANStatus(0x00200) # Driver not loaded
PCAN_ERROR_HWINUSE = TPCANStatus(0x00400) # Hardware already in use by a Net
PCAN_ERROR_NETINUSE = TPCANStatus(0x00800) # A Client is already connected to the Net
PCAN_ERROR_ILLHW = TPCANStatus(0x01400) # Hardware handle is invalid
PCAN_ERROR_ILLNET = TPCANStatus(0x01800) # Net handle is invalid
PCAN_ERROR_ILLCLIENT = TPCANStatus(0x01C00) # Client handle is invalid
PCAN_ERROR_ILLHANDLE = TPCANStatus(
PCAN_ERROR_ILLHW | PCAN_ERROR_ILLNET | PCAN_ERROR_ILLCLIENT
) # Mask for all handle errors
PCAN_ERROR_RESOURCE = TPCANStatus(
0x02000
) # Resource (FIFO, Client, timeout) cannot be created
PCAN_ERROR_ILLPARAMTYPE = TPCANStatus(0x04000) # Invalid parameter
PCAN_ERROR_ILLPARAMVAL = TPCANStatus(0x08000) # Invalid parameter value
PCAN_ERROR_UNKNOWN = TPCANStatus(0x10000) # Unknown error
PCAN_ERROR_ILLDATA = TPCANStatus(0x20000) # Invalid data, function, or action
PCAN_ERROR_ILLMODE = TPCANStatus(
0x80000
) # Driver object state is wrong for the attempted operation
PCAN_ERROR_CAUTION = TPCANStatus(
0x2000000
) # An operation was successfully carried out, however, irregularities were registered
PCAN_ERROR_INITIALIZE = TPCANStatus(
0x4000000
) # Channel is not initialized [Value was changed from 0x40000 to 0x4000000]
PCAN_ERROR_ILLOPERATION = TPCANStatus(
0x8000000
) # Invalid operation [Value was changed from 0x80000 to 0x8000000]
# PCAN devices
#
PCAN_NONE = TPCANDevice(0x00) # Undefined, unknown or not selected PCAN device value
PCAN_PEAKCAN = TPCANDevice(0x01) # PCAN Non-PnP devices. NOT USED WITHIN PCAN-Basic API
PCAN_ISA = TPCANDevice(0x02) # PCAN-ISA, PCAN-PC/104, and PCAN-PC/104-Plus
PCAN_DNG = TPCANDevice(0x03) # PCAN-Dongle
PCAN_PCI = TPCANDevice(0x04) # PCAN-PCI, PCAN-cPCI, PCAN-miniPCI, and PCAN-PCI Express
PCAN_USB = TPCANDevice(0x05) # PCAN-USB and PCAN-USB Pro
PCAN_PCC = TPCANDevice(0x06) # PCAN-PC Card
PCAN_VIRTUAL = TPCANDevice(
0x07
) # PCAN Virtual hardware. NOT USED WITHIN PCAN-Basic API
PCAN_LAN = TPCANDevice(0x08) # PCAN Gateway devices
# PCAN parameters
#
PCAN_DEVICE_ID = TPCANParameter(0x01) # Device identifier parameter
PCAN_5VOLTS_POWER = TPCANParameter(0x02) # 5-Volt power parameter
PCAN_RECEIVE_EVENT = TPCANParameter(0x03) # PCAN receive event handler parameter
PCAN_MESSAGE_FILTER = TPCANParameter(0x04) # PCAN message filter parameter
PCAN_API_VERSION = TPCANParameter(0x05) # PCAN-Basic API version parameter
PCAN_CHANNEL_VERSION = TPCANParameter(0x06) # PCAN device channel version parameter
PCAN_BUSOFF_AUTORESET = TPCANParameter(0x07) # PCAN Reset-On-Busoff parameter
PCAN_LISTEN_ONLY = TPCANParameter(0x08) # PCAN Listen-Only parameter
PCAN_LOG_LOCATION = TPCANParameter(0x09) # Directory path for log files
PCAN_LOG_STATUS = TPCANParameter(0x0A) # Debug-Log activation status
PCAN_LOG_CONFIGURE = TPCANParameter(
0x0B
) # Configuration of the debugged information (LOG_FUNCTION_***)
PCAN_LOG_TEXT = TPCANParameter(0x0C) # Custom insertion of text into the log file
PCAN_CHANNEL_CONDITION = TPCANParameter(0x0D) # Availability status of a PCAN-Channel
PCAN_HARDWARE_NAME = TPCANParameter(0x0E) # PCAN hardware name parameter
PCAN_RECEIVE_STATUS = TPCANParameter(0x0F) # Message reception status of a PCAN-Channel
PCAN_CONTROLLER_NUMBER = TPCANParameter(0x10) # CAN-Controller number of a PCAN-Channel
PCAN_TRACE_LOCATION = TPCANParameter(0x11) # Directory path for PCAN trace files
PCAN_TRACE_STATUS = TPCANParameter(0x12) # CAN tracing activation status
PCAN_TRACE_SIZE = TPCANParameter(
0x13
) # Configuration of the maximum file size of a CAN trace
PCAN_TRACE_CONFIGURE = TPCANParameter(
0x14
) # Configuration of the trace file storing mode (TRACE_FILE_***)
PCAN_CHANNEL_IDENTIFYING = TPCANParameter(
0x15
) # Physical identification of a USB based PCAN-Channel by blinking its associated LED
PCAN_CHANNEL_FEATURES = TPCANParameter(
0x16
) # Capabilities of a PCAN device (FEATURE_***)
PCAN_BITRATE_ADAPTING = TPCANParameter(
0x17
) # Using of an existing bit rate (PCAN-View connected to a channel)
PCAN_BITRATE_INFO = TPCANParameter(0x18) # Configured bit rate as Btr0Btr1 value
PCAN_BITRATE_INFO_FD = TPCANParameter(
0x19
) # Configured bit rate as TPCANBitrateFD string
PCAN_BUSSPEED_NOMINAL = TPCANParameter(
0x1A
) # Configured nominal CAN Bus speed as Bits per seconds
PCAN_BUSSPEED_DATA = TPCANParameter(
0x1B
) # Configured CAN data speed as Bits per seconds
PCAN_IP_ADDRESS = TPCANParameter(
0x1C
) # Remote address of a LAN channel as string in IPv4 format
PCAN_LAN_SERVICE_STATUS = TPCANParameter(
0x1D
) # Status of the Virtual PCAN-Gateway Service
PCAN_ALLOW_STATUS_FRAMES = TPCANParameter(
0x1E
) # Status messages reception status within a PCAN-Channel
PCAN_ALLOW_RTR_FRAMES = TPCANParameter(
0x1F
) # RTR messages reception status within a PCAN-Channel
PCAN_ALLOW_ERROR_FRAMES = TPCANParameter(
0x20
) # Error messages reception status within a PCAN-Channel
PCAN_INTERFRAME_DELAY = TPCANParameter(
0x21
) # Delay, in microseconds, between sending frames
PCAN_ACCEPTANCE_FILTER_11BIT = TPCANParameter(
0x22
) # Filter over code and mask patterns for 11-Bit messages
PCAN_ACCEPTANCE_FILTER_29BIT = TPCANParameter(
0x23
) # Filter over code and mask patterns for 29-Bit messages
PCAN_IO_DIGITAL_CONFIGURATION = TPCANParameter(
0x24
) # Output mode of 32 digital I/O pin of a PCAN-USB Chip. 1: Output-Active 0 : Output Inactive
PCAN_IO_DIGITAL_VALUE = TPCANParameter(
0x25
) # Value assigned to a 32 digital I/O pins of a PCAN-USB Chip
PCAN_IO_DIGITAL_SET = TPCANParameter(
0x26
) # Value assigned to a 32 digital I/O pins of a PCAN-USB Chip - Multiple digital I/O pins to 1 = High
PCAN_IO_DIGITAL_CLEAR = TPCANParameter(0x27) # Clear multiple digital I/O pins to 0
PCAN_IO_ANALOG_VALUE = TPCANParameter(0x28) # Get value of a single analog input pin
PCAN_FIRMWARE_VERSION = TPCANParameter(
0x29
) # Get the version of the firmware used by the device associated with a PCAN-Channel
PCAN_ATTACHED_CHANNELS_COUNT = TPCANParameter(
0x2A
) # Get the amount of PCAN channels attached to a system
PCAN_ATTACHED_CHANNELS = TPCANParameter(
0x2B
) # Get information about PCAN channels attached to a system
PCAN_ALLOW_ECHO_FRAMES = TPCANParameter(
0x2C
) # Echo messages reception status within a PCAN-Channel
PCAN_DEVICE_PART_NUMBER = TPCANParameter(
0x2D
) # Get the part number associated to a device
# DEPRECATED parameters
#
PCAN_DEVICE_NUMBER = PCAN_DEVICE_ID # DEPRECATED. Use PCAN_DEVICE_ID instead
# PCAN parameter values
#
PCAN_PARAMETER_OFF = 0x00 # The PCAN parameter is not set (inactive)
PCAN_PARAMETER_ON = 0x01 # The PCAN parameter is set (active)
PCAN_FILTER_CLOSE = 0x00 # The PCAN filter is closed. No messages will be received
PCAN_FILTER_OPEN = (
0x01 # The PCAN filter is fully opened. All messages will be received
)
PCAN_FILTER_CUSTOM = 0x02 # The PCAN filter is custom configured. Only registered messages will be received
PCAN_CHANNEL_UNAVAILABLE = 0x00 # The PCAN-Channel handle is illegal, or its associated hardware is not available
PCAN_CHANNEL_AVAILABLE = 0x01 # The PCAN-Channel handle is available to be connected (PnP Hardware: it means furthermore that the hardware is plugged-in)
PCAN_CHANNEL_OCCUPIED = (
0x02 # The PCAN-Channel handle is valid, and is already being used
)
PCAN_CHANNEL_PCANVIEW = (
PCAN_CHANNEL_AVAILABLE | PCAN_CHANNEL_OCCUPIED
) # The PCAN-Channel handle is already being used by a PCAN-View application, but is available to connect
LOG_FUNCTION_DEFAULT = 0x00 # Logs system exceptions / errors
LOG_FUNCTION_ENTRY = 0x01 # Logs the entries to the PCAN-Basic API functions
LOG_FUNCTION_PARAMETERS = (
0x02 # Logs the parameters passed to the PCAN-Basic API functions
)
LOG_FUNCTION_LEAVE = 0x04 # Logs the exits from the PCAN-Basic API functions
LOG_FUNCTION_WRITE = 0x08 # Logs the CAN messages passed to the CAN_Write function
LOG_FUNCTION_READ = 0x10 # Logs the CAN messages received within the CAN_Read function
LOG_FUNCTION_ALL = (
0xFFFF # Logs all possible information within the PCAN-Basic API functions
)
TRACE_FILE_SINGLE = (
0x00 # A single file is written until it size reaches PAN_TRACE_SIZE
)
TRACE_FILE_SEGMENTED = (
0x01 # Traced data is distributed in several files with size PAN_TRACE_SIZE
)
TRACE_FILE_DATE = 0x02 # Includes the date into the name of the trace file
TRACE_FILE_TIME = 0x04 # Includes the start time into the name of the trace file
TRACE_FILE_OVERWRITE = 0x80 # Causes the overwriting of available traces (same name)
FEATURE_FD_CAPABLE = 0x01 # Device supports flexible data-rate (CAN-FD)
FEATURE_DELAY_CAPABLE = (
0x02 # Device supports a delay between sending frames (FPGA based USB devices)
)
FEATURE_IO_CAPABLE = (
0x04 # Device supports I/O functionality for electronic circuits (USB-Chip devices)
)
SERVICE_STATUS_STOPPED = 0x01 # The service is not running
SERVICE_STATUS_RUNNING = 0x04 # The service is running
# Other constants
#
MAX_LENGTH_HARDWARE_NAME = (
33 # Maximum length of the name of a device: 32 characters + terminator
)
MAX_LENGTH_VERSION_STRING = (
256 # Maximum length of a version string: 255 characters + terminator
)
# PCAN message types
#
PCAN_MESSAGE_STANDARD = TPCANMessageType(
0x00
) # The PCAN message is a CAN Standard Frame (11-bit identifier)
PCAN_MESSAGE_RTR = TPCANMessageType(
0x01
) # The PCAN message is a CAN Remote-Transfer-Request Frame
PCAN_MESSAGE_EXTENDED = TPCANMessageType(
0x02
) # The PCAN message is a CAN Extended Frame (29-bit identifier)
PCAN_MESSAGE_FD = TPCANMessageType(
0x04
) # The PCAN message represents a FD frame in terms of CiA Specs
PCAN_MESSAGE_BRS = TPCANMessageType(
0x08
) # The PCAN message represents a FD bit rate switch (CAN data at a higher bit rate)
PCAN_MESSAGE_ESI = TPCANMessageType(
0x10
) # The PCAN message represents a FD error state indicator(CAN FD transmitter was error active)
PCAN_MESSAGE_ECHO = TPCANMessageType(
0x20
) # The PCAN message represents an echo CAN Frame
PCAN_MESSAGE_ERRFRAME = TPCANMessageType(
0x40
) # The PCAN message represents an error frame
PCAN_MESSAGE_STATUS = TPCANMessageType(
0x80
) # The PCAN message represents a PCAN status message
# LookUp Parameters
#
LOOKUP_DEVICE_TYPE = (
b"devicetype" # Lookup channel by Device type (see PCAN devices e.g. PCAN_USB)
)
LOOKUP_DEVICE_ID = b"deviceid" # Lookup channel by device id
LOOKUP_CONTROLLER_NUMBER = (
b"controllernumber" # Lookup channel by CAN controller 0-based index
)
LOOKUP_IP_ADDRESS = b"ipaddress" # Lookup channel by IP address (LAN channels only)
# Frame Type / Initialization Mode
#
PCAN_MODE_STANDARD = PCAN_MESSAGE_STANDARD
PCAN_MODE_EXTENDED = PCAN_MESSAGE_EXTENDED
# Baud rate codes = BTR0/BTR1 register values for the CAN controller.
# You can define your own Baud rate with the BTROBTR1 register.
# Take a look at www.peak-system.com for our free software "BAUDTOOL"
# to calculate the BTROBTR1 register for every bit rate and sample point.
#
PCAN_BAUD_1M = TPCANBaudrate(0x0014) # 1 MBit/s
PCAN_BAUD_800K = TPCANBaudrate(0x0016) # 800 kBit/s
PCAN_BAUD_500K = TPCANBaudrate(0x001C) # 500 kBit/s
PCAN_BAUD_250K = TPCANBaudrate(0x011C) # 250 kBit/s
PCAN_BAUD_125K = TPCANBaudrate(0x031C) # 125 kBit/s
PCAN_BAUD_100K = TPCANBaudrate(0x432F) # 100 kBit/s
PCAN_BAUD_95K = TPCANBaudrate(0xC34E) # 95,238 kBit/s
PCAN_BAUD_83K = TPCANBaudrate(0x852B) # 83,333 kBit/s
PCAN_BAUD_50K = TPCANBaudrate(0x472F) # 50 kBit/s
PCAN_BAUD_47K = TPCANBaudrate(0x1414) # 47,619 kBit/s
PCAN_BAUD_33K = TPCANBaudrate(0x8B2F) # 33,333 kBit/s
PCAN_BAUD_20K = TPCANBaudrate(0x532F) # 20 kBit/s
PCAN_BAUD_10K = TPCANBaudrate(0x672F) # 10 kBit/s
PCAN_BAUD_5K = TPCANBaudrate(0x7F7F) # 5 kBit/s
# Represents the configuration for a CAN bit rate
# Note:
# * Each parameter and its value must be separated with a '='.
# * Each pair of parameter/value must be separated using ','.
#
# Example:
# f_clock=80000000,nom_brp=10,nom_tseg1=5,nom_tseg2=2,nom_sjw=1,data_brp=4,data_tseg1=7,data_tseg2=2,data_sjw=1
#
PCAN_BR_CLOCK = TPCANBitrateFD(b"f_clock")
PCAN_BR_CLOCK_MHZ = TPCANBitrateFD(b"f_clock_mhz")
PCAN_BR_NOM_BRP = TPCANBitrateFD(b"nom_brp")
PCAN_BR_NOM_TSEG1 = TPCANBitrateFD(b"nom_tseg1")
PCAN_BR_NOM_TSEG2 = TPCANBitrateFD(b"nom_tseg2")
PCAN_BR_NOM_SJW = TPCANBitrateFD(b"nom_sjw")
PCAN_BR_NOM_SAMPLE = TPCANBitrateFD(b"nom_sam")
PCAN_BR_DATA_BRP = TPCANBitrateFD(b"data_brp")
PCAN_BR_DATA_TSEG1 = TPCANBitrateFD(b"data_tseg1")
PCAN_BR_DATA_TSEG2 = TPCANBitrateFD(b"data_tseg2")
PCAN_BR_DATA_SJW = TPCANBitrateFD(b"data_sjw")
PCAN_BR_DATA_SAMPLE = TPCANBitrateFD(b"data_ssp_offset")
# Supported Non-PnP Hardware types
#
PCAN_TYPE_ISA = TPCANType(0x01) # PCAN-ISA 82C200
PCAN_TYPE_ISA_SJA = TPCANType(0x09) # PCAN-ISA SJA1000
PCAN_TYPE_ISA_PHYTEC = TPCANType(0x04) # PHYTEC ISA
PCAN_TYPE_DNG = TPCANType(0x02) # PCAN-Dongle 82C200
PCAN_TYPE_DNG_EPP = TPCANType(0x03) # PCAN-Dongle EPP 82C200
PCAN_TYPE_DNG_SJA = TPCANType(0x05) # PCAN-Dongle SJA1000
PCAN_TYPE_DNG_SJA_EPP = TPCANType(0x06) # PCAN-Dongle EPP SJA1000
# string description of the error codes
PCAN_DICT_STATUS = {
PCAN_ERROR_OK: "OK",
PCAN_ERROR_XMTFULL: "XMTFULL",
PCAN_ERROR_OVERRUN: "OVERRUN",
PCAN_ERROR_BUSLIGHT: "BUSLIGHT",
PCAN_ERROR_BUSHEAVY: "BUSHEAVY",
PCAN_ERROR_BUSWARNING: "BUSWARNING",
PCAN_ERROR_BUSPASSIVE: "BUSPASSIVE",
PCAN_ERROR_BUSOFF: "BUSOFF",
PCAN_ERROR_ANYBUSERR: "ANYBUSERR",
PCAN_ERROR_QRCVEMPTY: "QRCVEMPTY",
PCAN_ERROR_QOVERRUN: "QOVERRUN",
PCAN_ERROR_QXMTFULL: "QXMTFULL",
PCAN_ERROR_REGTEST: "ERR_REGTEST",
PCAN_ERROR_NODRIVER: "NODRIVER",
PCAN_ERROR_HWINUSE: "HWINUSE",
PCAN_ERROR_NETINUSE: "NETINUSE",
PCAN_ERROR_ILLHW: "ILLHW",
PCAN_ERROR_ILLNET: "ILLNET",
PCAN_ERROR_ILLCLIENT: "ILLCLIENT",
PCAN_ERROR_ILLHANDLE: "ILLHANDLE",
PCAN_ERROR_RESOURCE: "ERR_RESOURCE",
PCAN_ERROR_ILLPARAMTYPE: "ILLPARAMTYPE",
PCAN_ERROR_ILLPARAMVAL: "ILLPARAMVAL",
PCAN_ERROR_UNKNOWN: "UNKNOWN",
PCAN_ERROR_ILLDATA: "ILLDATA",
PCAN_ERROR_CAUTION: "CAUTION",
PCAN_ERROR_INITIALIZE: "ERR_INITIALIZE",
PCAN_ERROR_ILLOPERATION: "ILLOPERATION",
}
# Represents a PCAN message
#
class TPCANMsg(Structure):
"""
Represents a PCAN message
"""
_fields_ = [
("ID", c_uint), # 11/29-bit message identifier
("MSGTYPE", TPCANMessageType), # Type of the message
("LEN", c_ubyte), # Data Length Code of the message (0..8)
("DATA", c_ubyte * 8),
] # Data of the message (DATA[0]..DATA[7])
# Represents a timestamp of a received PCAN message
# Total Microseconds = micros + 1000 * millis + 0x100000000 * 1000 * millis_overflow
#
class TPCANTimestamp(Structure):
"""
Represents a timestamp of a received PCAN message
Total Microseconds = micros + 1000 * millis + 0x100000000 * 1000 * millis_overflow
"""
_fields_ = [
("millis", c_uint), # Base-value: milliseconds: 0.. 2^32-1
("millis_overflow", c_ushort), # Roll-arounds of millis
("micros", c_ushort),
] # Microseconds: 0..999
# Represents a PCAN message from a FD capable hardware
#
class TPCANMsgFD(Structure):
"""
Represents a PCAN message
"""
_fields_ = [
("ID", c_uint), # 11/29-bit message identifier
("MSGTYPE", TPCANMessageType), # Type of the message
("DLC", c_ubyte), # Data Length Code of the message (0..15)
("DATA", c_ubyte * 64),
] # Data of the message (DATA[0]..DATA[63])
# Describes an available PCAN channel
#
class TPCANChannelInformation(Structure):
"""
Describes an available PCAN channel
"""
_fields_ = [
("channel_handle", TPCANHandle), # PCAN channel handle
("device_type", TPCANDevice), # Kind of PCAN device
("controller_number", c_ubyte), # CAN-Controller number
("device_features", c_uint), # Device capabilities flag (see FEATURE_*)
("device_name", c_char * MAX_LENGTH_HARDWARE_NAME), # Device name
("device_id", c_uint), # Device number
("channel_condition", c_uint),
] # Availability status of a PCAN-Channel
# ///////////////////////////////////////////////////////////
# Additional objects
# ///////////////////////////////////////////////////////////
PCAN_BITRATES = {
1000000: PCAN_BAUD_1M,
800000: PCAN_BAUD_800K,
500000: PCAN_BAUD_500K,
250000: PCAN_BAUD_250K,
125000: PCAN_BAUD_125K,
100000: PCAN_BAUD_100K,
95000: PCAN_BAUD_95K,
83000: PCAN_BAUD_83K,
50000: PCAN_BAUD_50K,
47000: PCAN_BAUD_47K,
33000: PCAN_BAUD_33K,
20000: PCAN_BAUD_20K,
10000: PCAN_BAUD_10K,
5000: PCAN_BAUD_5K,
}
PCAN_FD_PARAMETER_LIST = (
"nom_brp",
"nom_tseg1",
"nom_tseg2",
"nom_sjw",
"data_brp",
"data_tseg1",
"data_tseg2",
"data_sjw",
)
PCAN_CHANNEL_NAMES = {
"PCAN_NONEBUS": PCAN_NONEBUS,
"PCAN_ISABUS1": PCAN_ISABUS1,
"PCAN_ISABUS2": PCAN_ISABUS2,
"PCAN_ISABUS3": PCAN_ISABUS3,
"PCAN_ISABUS4": PCAN_ISABUS4,
"PCAN_ISABUS5": PCAN_ISABUS5,
"PCAN_ISABUS6": PCAN_ISABUS6,
"PCAN_ISABUS7": PCAN_ISABUS7,
"PCAN_ISABUS8": PCAN_ISABUS8,
"PCAN_DNGBUS1": PCAN_DNGBUS1,
"PCAN_PCIBUS1": PCAN_PCIBUS1,
"PCAN_PCIBUS2": PCAN_PCIBUS2,
"PCAN_PCIBUS3": PCAN_PCIBUS3,
"PCAN_PCIBUS4": PCAN_PCIBUS4,
"PCAN_PCIBUS5": PCAN_PCIBUS5,
"PCAN_PCIBUS6": PCAN_PCIBUS6,
"PCAN_PCIBUS7": PCAN_PCIBUS7,
"PCAN_PCIBUS8": PCAN_PCIBUS8,
"PCAN_PCIBUS9": PCAN_PCIBUS9,
"PCAN_PCIBUS10": PCAN_PCIBUS10,
"PCAN_PCIBUS11": PCAN_PCIBUS11,
"PCAN_PCIBUS12": PCAN_PCIBUS12,
"PCAN_PCIBUS13": PCAN_PCIBUS13,
"PCAN_PCIBUS14": PCAN_PCIBUS14,
"PCAN_PCIBUS15": PCAN_PCIBUS15,
"PCAN_PCIBUS16": PCAN_PCIBUS16,
"PCAN_USBBUS1": PCAN_USBBUS1,
"PCAN_USBBUS2": PCAN_USBBUS2,
"PCAN_USBBUS3": PCAN_USBBUS3,
"PCAN_USBBUS4": PCAN_USBBUS4,
"PCAN_USBBUS5": PCAN_USBBUS5,
"PCAN_USBBUS6": PCAN_USBBUS6,
"PCAN_USBBUS7": PCAN_USBBUS7,
"PCAN_USBBUS8": PCAN_USBBUS8,
"PCAN_USBBUS9": PCAN_USBBUS9,
"PCAN_USBBUS10": PCAN_USBBUS10,
"PCAN_USBBUS11": PCAN_USBBUS11,
"PCAN_USBBUS12": PCAN_USBBUS12,
"PCAN_USBBUS13": PCAN_USBBUS13,
"PCAN_USBBUS14": PCAN_USBBUS14,
"PCAN_USBBUS15": PCAN_USBBUS15,
"PCAN_USBBUS16": PCAN_USBBUS16,
"PCAN_PCCBUS1": PCAN_PCCBUS1,
"PCAN_PCCBUS2": PCAN_PCCBUS2,
"PCAN_LANBUS1": PCAN_LANBUS1,
"PCAN_LANBUS2": PCAN_LANBUS2,
"PCAN_LANBUS3": PCAN_LANBUS3,
"PCAN_LANBUS4": PCAN_LANBUS4,
"PCAN_LANBUS5": PCAN_LANBUS5,
"PCAN_LANBUS6": PCAN_LANBUS6,
"PCAN_LANBUS7": PCAN_LANBUS7,
"PCAN_LANBUS8": PCAN_LANBUS8,
"PCAN_LANBUS9": PCAN_LANBUS9,
"PCAN_LANBUS10": PCAN_LANBUS10,
"PCAN_LANBUS11": PCAN_LANBUS11,
"PCAN_LANBUS12": PCAN_LANBUS12,
"PCAN_LANBUS13": PCAN_LANBUS13,
"PCAN_LANBUS14": PCAN_LANBUS14,
"PCAN_LANBUS15": PCAN_LANBUS15,
"PCAN_LANBUS16": PCAN_LANBUS16,
}
VALID_PCAN_CAN_CLOCKS = [8_000_000]
VALID_PCAN_FD_CLOCKS = [
20_000_000,
24_000_000,
30_000_000,
40_000_000,
60_000_000,
80_000_000,
]
# ///////////////////////////////////////////////////////////
# PCAN-Basic API function declarations
# ///////////////////////////////////////////////////////////
# PCAN-Basic API class implementation
#
class PCANBasic:
"""PCAN-Basic API class implementation"""
def __init__(self):
if platform.system() == "Windows":
load_library_func = windll.LoadLibrary
else:
load_library_func = cdll.LoadLibrary
if platform.system() == "Windows" or "CYGWIN" in platform.system():
lib_name = "PCANBasic"
elif platform.system() == "Darwin":
# PCBUSB library is a third-party software created
# and maintained by the MacCAN project
lib_name = "PCBUSB"
else:
lib_name = "pcanbasic"
lib_path = find_library(lib_name)
if not lib_path:
raise OSError(f"{lib_name} library not found.")
try:
self.__m_dllBasic = load_library_func(lib_path)
except OSError:
raise OSError(
f"The PCAN-Basic API could not be loaded. ({lib_path})"
) from None
# Initializes a PCAN Channel
#
def Initialize(
self,
Channel,
Btr0Btr1,
HwType=TPCANType(0), # noqa: B008
IOPort=c_uint(0), # noqa: B008
Interrupt=c_ushort(0), # noqa: B008
):
"""Initializes a PCAN Channel
Parameters:
Channel : A TPCANHandle representing a PCAN Channel
Btr0Btr1 : The speed for the communication (BTR0BTR1 code)
HwType : Non-PnP: The type of hardware and operation mode
IOPort : Non-PnP: The I/O address for the parallel port
Interrupt: Non-PnP: Interrupt number of the parallel port
Returns:
A TPCANStatus error code
"""
try:
res = self.__m_dllBasic.CAN_Initialize(
Channel, Btr0Btr1, HwType, IOPort, Interrupt
)
return TPCANStatus(res)
except:
logger.error("Exception on PCANBasic.Initialize")
raise
# Initializes a FD capable PCAN Channel
#
def InitializeFD(self, Channel, BitrateFD):
"""Initializes a FD capable PCAN Channel
Parameters:
Channel : The handle of a FD capable PCAN Channel
BitrateFD : The speed for the communication (FD bit rate string)
Remarks:
* See PCAN_BR_* values.
* parameter and values must be separated by '='
* Couples of Parameter/value must be separated by ','
* Following Parameter must be filled out: f_clock, data_brp, data_sjw, data_tseg1, data_tseg2,
nom_brp, nom_sjw, nom_tseg1, nom_tseg2.
* Following Parameters are optional (not used yet): data_ssp_offset, nom_sam
Example:
f_clock=80000000,nom_brp=10,nom_tseg1=5,nom_tseg2=2,nom_sjw=1,data_brp=4,data_tseg1=7,data_tseg2=2,data_sjw=1
Returns:
A TPCANStatus error code
"""
try:
res = self.__m_dllBasic.CAN_InitializeFD(Channel, BitrateFD)
return TPCANStatus(res)
except:
logger.error("Exception on PCANBasic.InitializeFD")
raise
# Uninitializes one or all PCAN Channels initialized by CAN_Initialize
#
def Uninitialize(self, Channel):
"""Uninitializes one or all PCAN Channels initialized by CAN_Initialize
Remarks:
Giving the TPCANHandle value "PCAN_NONEBUS", uninitialize all initialized channels
Parameters:
Channel : A TPCANHandle representing a PCAN Channel
Returns:
A TPCANStatus error code
"""
try:
res = self.__m_dllBasic.CAN_Uninitialize(Channel)
return TPCANStatus(res)
except:
logger.error("Exception on PCANBasic.Uninitialize")
raise
# Resets the receive and transmit queues of the PCAN Channel
#
def Reset(self, Channel):
"""Resets the receive and transmit queues of the PCAN Channel
Remarks:
A reset of the CAN controller is not performed
Parameters:
Channel : A TPCANHandle representing a PCAN Channel
Returns:
A TPCANStatus error code
"""
try:
res = self.__m_dllBasic.CAN_Reset(Channel)
return TPCANStatus(res)
except:
logger.error("Exception on PCANBasic.Reset")
raise
# Gets the current status of a PCAN Channel
#
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
# Reads a CAN message from the receive queue of a PCAN Channel
#
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-tuple, 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 tuple with three values
"""
try:
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
# Reads a CAN message from the receive queue of a FD capable PCAN Channel
#
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-tuple, 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 tuple with three values
"""
try:
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
# Transmits a CAN message
#
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
# Transmits a CAN message over a FD capable PCAN Channel
#
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
# Configures the reception filter
#
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
# Retrieves a PCAN Channel value
#
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-tuple, 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 tuple 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
or Parameter == PCAN_FIRMWARE_VERSION
or Parameter == PCAN_DEVICE_PART_NUMBER
):
mybuffer = create_string_buffer(256)
elif Parameter == PCAN_ATTACHED_CHANNELS:
res = self.GetValue(Channel, PCAN_ATTACHED_CHANNELS_COUNT)
if TPCANStatus(res[0]) != PCAN_ERROR_OK:
return TPCANStatus(res[0]), ()
mybuffer = (TPCANChannelInformation * res[1])()
elif (
Parameter == PCAN_ACCEPTANCE_FILTER_11BIT
or PCAN_ACCEPTANCE_FILTER_29BIT
):
mybuffer = c_int64(0)
else:
mybuffer = c_int(0)
res = self.__m_dllBasic.CAN_GetValue(
Channel, Parameter, byref(mybuffer), sizeof(mybuffer)
)
if Parameter == PCAN_ATTACHED_CHANNELS:
return TPCANStatus(res), mybuffer
else:
return TPCANStatus(res), mybuffer.value
except:
logger.error("Exception on PCANBasic.GetValue")
raise
# Returns a descriptive text of a given TPCANStatus
# error code, in any desired language
#
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)
elif (
Parameter == PCAN_ACCEPTANCE_FILTER_11BIT
or PCAN_ACCEPTANCE_FILTER_29BIT
):
mybuffer = c_int64(0)
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
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-tuple, 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 tuple 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
def LookUpChannel(self, Parameters):
"""Finds a PCAN-Basic channel that matches with the given parameters
Remarks:
The return value of this method is a 2-tuple, where
the first value is the result (TPCANStatus) of the method and
the second one a TPCANHandle value
Parameters:
Parameters : A comma separated string contained pairs of parameter-name/value
to be matched within a PCAN-Basic channel
Returns:
A tuple with 2 values
"""
try:
mybuffer = TPCANHandle(0)
res = self.__m_dllBasic.CAN_LookUpChannel(Parameters, byref(mybuffer))
return TPCANStatus(res), mybuffer
except:
logger.error("Exception on PCANBasic.LookUpChannel")
raise
|