canChannel - Construct CAN channel connected to selected device

Syntax

Description

canch = canChannel('vendor', 'device', devicechannelindex) returns a CAN channel connected to a device from a specified vendor.

For Vector products, device is a combination of the device type and a device index, such as 'CANCaseXL 1'. For example, if there are two CANcardXL devices, device can be 'CANcardXL 1' or 'CANcardXL 2'.

For National Instruments CAN devices, use canch = canChannel('vendor', 'devicenumber'), where the vendor is the literal string 'NI', and the devicenumber is the interface number defined for the channel in NI Measurement & Automation Explorer.

Tips

• You cannot have more than one active connection to the same NI device channel.

• Use canHWInfo to obtain a list of available devices.

Input Arguments

vendor	The name of the CAN device vendor. Specify the vendor name as a string.
device	The CAN interface that you want to connect to.
devicechannelindex	A numeric channel on the specified device.
canch	The CAN channel object the you create.

Properties

CAN Channel Properties

BusLoad	Display load on CAN bus
Database	Store CAN database information
MessageReceivedFcn	Specify function to run
MessageReceivedFcnCount	Specify number of messages available before function is triggered
Running	Determine status of CAN channel
SilentMode	Specify if channel is active or silent
TransceiverName	Display name of CAN transceiver
TransceiverState	Display state or mode of CAN transceiver
UserData	Enter custom data

CAN Device Properties

Device	Display CAN channel device type
Device(NI)	Display NI CAN channel device type
DeviceChannelIndex	Display CAN device channel index
DeviceSerialNumber	Display CAN device serial number
DeviceVendor	Display device vendor name
InitializationAccess	Determine control of device channel

Bit Timing Properties

BusSpeed	Display speed of CAN bus
NumOfSamples	Display number of samples available to channel
SJW	Display synchronization jump width (SJW) of bit time segment
TSEG1	Display amount that channel can lengthen sample time
TSEG2	Display amount that channel can shorten sample time

Examples

canch = canChannel('Vector','CANCaseXL 1',1)
canch = canChannel('Vector','Virtual 1',2)
canch = canChannel('NI', 'CAN1')

Notes   You cannot use the same variable to create multiple channels sequentially. Clear any channel in use before using the same variable to construct a new CAN channel. You cannot create arrays of CAN channel objects. Each object you create must exist as its own individual variable.

See Also

canHWInfo

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS