Example Code

GURO · ‎01-17-2012

Hi guys, this is my first share.

I think a C # wrapper functions for CAN may be useful to many.
To link the CAN API with C # I have used the C++ language and the /CLI extensions.

The system used to test the project was composef from

NI PXI-1033 Chassis

NI PXI 8512 Board

The software installed was

NI-XNET 1.4 (version 1.4.0.f0)

NI-CAN 2.7.3 (version 2.7.3f2)

In order to use the CAN functions with the NI PXI-1033 and XNET CAN boards it's required the

Compatibility Layer installation. This options must be checked in the NI-XNET driver.

If all the hardware and software was installed correctly MAX should show this informations

Under Devices and Interfaces

one board NI-PXI 8512 (ports)
one chassis NI-PXI-1033
- one NI-PXI-1033 Integrated MXI Express "Remote Controller"
- one NI-PXI-8512 "CAN1,CAN2"

Please notice that the CAN number is different from CAN and XINET-CAN

The first port address is CAN0 for CAN API and CAN1 for XNET API

The project was develope with Visual Studio 2010.

The soultion has two projects, NICanProxy is the Class Library which realize the

NI-CAN proxy and TestNICanProxy is a console application which explains some

functionality of the proxy.

The NICanProxy file contains the following class:

ChannelAPI

Channel API wrapper for .NET

ChannelConfig

Channel configuration for Channel API CreateMessage functions

HardwareInfo

Hardware info details

MessageConfig

Message configuration for Channel API CreateMessage functions

Service

Service Utilities

Timestamp

Timestamp returned from Channel API Read functions

and the following enumerations;

ArbitrationId

Message Arbitration Id enumeration

CanProperty

Defines the properties available with NI-CAN

ChannelDataType

Defines the channel data type

IoMode

Defines I/O mode

MessageByteOrder

Defines the byte order

NamesMode

Defines GetName functionality

19-01-2012

Added log4net management to proxy. Some comment are swiched to XML comment.

Have a nice day

Roberto Guerzoni

Tecnologic s.r.l.

Campogalliano (MO)

Leo.1065 · ‎01-17-2017

Hello

First, excellent work/development here... I dont know why NI does not give you sample project that do that automatically. Afterall, we are buying their hardware. Just make it easier for us to develop/use... maybe for another topic 🙂

There seems to be a warning when compiling; and continue starting the project throws the build error message.

Warning

Severity Code Description Project File Line Suppression State
Warning The primary reference "NICanProxy" could not be resolved because it was built against the ".NETFramework,Version=v4.5.2" framework. This is a higher version than the currently targeted framework ".NETFramework,Version=v4.0". TestNICanProxy

Build Error

Visual studio cannnot start debugging because the debug target.. c:\.... is missing. Please build the project and retry...

I know I have correct path as I am setting the path, and remove reference NiCanProxy reference and then readding it.

What is the issue here and if anyone has found the solution.. thanks in advance.. Leo

阿萨德 · ‎08-01-2019

Hello, I'd like to ask where the driver of PXI-8512 is downloaded. Do you have a download address? I can't find it on the official website

masalinas.gancedo · ‎07-14-2020

I'm supporting and old USB-8472 device using the NI-CAN. Im'm trying to use your wrapper and I tested using your TestNICanProxy. Configure a CAN Channel from MAX called WheelBasedVehicleSpeed and when I exexute your code and debug from MessageConfigTest1 where you read the value from this channel configured you the console lof this:

Testing GetPropertyValue
ChannelAPI.InitStart(ChannelList, VCAN1, IoMode.Output, 0, out wTaskRef)
NI-CAN: (Hex 0xBFF6210D) Your application uses a feature that is not supported by your NI CAN or LIN hardware. Solutions: Contact NI to upgrade your CAN hardware; Consult the Programmer Reference to avoid the new feature (typically related to RTSI or SJA1000); Do not use the Channel API on USB-847x hardware.

My question is do you implement th Message API? is this the API that my device only implement?

Regards