Is NI-CAN v2.3 & NI PCI-CAN/XS2 with Frame API Thread Safe?

Hi, I'm downloading a file from the host computer to the modules. When I downloaded the data to the four module at the same time (with 4 threads), I'm getting communication failure ~ 20% of the time. When I synchronized the software, so it will download two modules at a time (using one port from each card at a time). The communication failure disappeared. I just wonder if the NI-CAN software & PCI-CAN/XS2 are thread-safe. I'd appreciate if anyone have any suggestion.
Information of the software & hardware
- Computer: Pentium4 2.8GHz, 512M Ram
- OS: Windows 2000
- Development Tool: Borland C++ Builder v5
- NI-CAN v2.3 - The application is using Frame API
- PCI-CAN/XS2 (SW-Selectable CAN, 2 Ports)
- CAN bus: 500k High Speed
Thanks
Eric

The NI-CAN software does support threads. What's the specific error
you're getting that 20% of the time? It may be due to something besides
the multi-threading.
Regards,
Matt S.
LabVIEW Integration Engineer with experience in LabVIEW Real-Time, LabVIEW FPGA, DAQ, Machine Vision, as well as C/C++. CLAD, working on CLD and CLA.

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The second frame lost in CAN communication when use NI PCI-CAN/XS2 card

I got a trouble on CAN communication recently.
I need to commmunicate a Cluster with CAN BUS,the baud rate is 500kBPS,the CAN card is NI PCI-CAN/XS2. The operating system is Windows XP.
normally,the PC send a command to Cluster,then read back a frame of data from the Cluster,but for some commands,the Cluster will return two frames of data,and the programe on PC cannot receive the Seconds frame,it lost.
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so,is there some software/hardware configuration need to be done to get the second data frame?
the attached pictures are NI-CAN/Vector CAN monitor and CAN init/write&read in my programe.
Any reply is appreciate!!! thanks
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Solved!
Go to Solution.
Attachments:
NI CAN monitor.jpg ‏165 KB
Vector CAN monitor.jpg ‏58 KB
CAN init.jpg ‏80 KB

Thanks your code.
I try the code you posted, It still no work, I found you has improved the "Get data.vi",It works better,but the second frame still no shown.
I used the NI CAN monitor in MAX to monitor the CAN bus,there is no second frame shown in the monitor,See attach pictures.but It shown in the Vector CAN monitor and the code call the Vector DLL.
Have a great day.
帖子被iwanttofly014在 12-16-2009 08:02 PM
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Attachments:
LabVIEW VS Monitor(Vector CAN).JPG ‏70 KB
LabVIEW VS Monitor(NI CAN).JPG ‏40 KB

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The problem may be related to a specific chip ( MITE) on the PCI CAN card. Please call us at 512-795-8248 with the part no and the serial of the PCI CAN card, so that we can verify whether the CAN card may have a hardware problem and have you send the card back to us for repair or to get a replacement.

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http://www.maccon.de/fileadmin/FTPROOT/s400600can_e.pdf
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http://img.photobucket.com/albums/v208/rainman1978/sdoexample.jpg
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Transmit.Data(6)=&H0
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Rainman
Attachments:
Transmit Receive same Port.zip ‏5 KB

Got it!!!
To all that will try to use the VB6 application:
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Is NI-CAN v2.3 & NI PCI-CAN/XS2 with Frame API Thread Safe?

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