Using CAN hardware with 2 VI

I want to use my CAN hardware with 2 VI. Each VI will send and recieve CAN frames to CAN network. I must run once Cconfig and Copen VIs and use Copen outs (ObjHandle out and Error out) in this 2 VI. How is Data communication among 2 VI?

Well, only one reference to the device can be opened at once, so each VI will need to use this reference. Calling read/write from 2 different VIs using the same handle/reference may not be very good.
I would suggest building a lower layer VI that handles the CAN communication. For example, if you read temperature using ID 1 for uC 1 and ID 2 for uC2, your lower level VI can handle the CAN communication and just set 2 global variables temp1 and temp2. A higher level VI could just read the global variable temp1 and ignore temp2 (and also ignore CAN communication). So, a lower level CAN communication VI that sets and read global variables. Higher level VIs (controlled by users) that set and read globals.
You could also purchase another USB-CAN and connect each device to a single micro-controller...but that's more expensive and sort of defeats the purpose of having a bus...
O. Proulx
National Instruments
www.ni.com/support

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So, the question...is there a way for me to hook this beastie up to my iMac? Or will I be left with no option but connecting it to my lonely Ubuntu box in the basement?

Without a SCSI card there's really no way to connect the scanner to the Mac. It would be easier and cheaper to get a new USB-based scanner. You would also need software to use the scanner that's compatible with Intel Macs. This could also prove a problem given the scanner's age.
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I can dynamically and seamlessly generate different waveforms by triggering different scriptTriggers that drive one or more of the 4 PFI lines. However, I need to evaluate a channel at a specific location or locations set by a script marker in real-time and generate a different waveform stored in on-board memory based on the result of the evaluation. I have attempted to use the hardware compare feature without any success. I am trying to dynamically respond to an I2C device based on the ACKs or NACK response of the device under test. Can the 6551 card accomplish this? Has anyone successfully tested an I2C or SMBus communication stream with 6551 card?

Hello,
I can understand why hardware compare did not work out for you application. Hardware compare uses a signal that was generated to make a digital pattern and then waits a few clock cycles before acquiring the signal that needs to be compared to the digital pattern.
I would look into using a script trigger to evaluate the channel value, where the script structure controls when it is evaluated. Please note that script triggers will need to be cleared after they are detected for reasserting. Some script syntax actually clear the script trigger and then use a wait until script trigger structure. Please refer to the HS DIO Help for documentation on Common Scripting Use Cases.
Please provide us with further details about your application. The more information, the better! I was not too clear on what you where wanting to evaluate and where is it coming from.
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Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)?

Hi all,
Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)? if yes then how? please give brief idea.
Regards,
Amit

There is probably a way to do it, but it it may be easier to use an X-series board for the job. They support a new counter capability for count reset on a digital edge without needing to be configured in encoder position mode. I am not sure exactly how that feature's been implemented however, so maybe it won't make things easier after all.
The plan based on the hoped-for behavior:
1. Configure an X-series counter for pulse generation based on "ticks" of your clock channel.
2. Set both initial delay and low time to the critical # of ticks.
3. Configure for count reset on a digital edge (if possible in pulse generation mode)
4. Configure the count reset value to be the critical # (or possibly 1 less, if possible in pulse generation mode)
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The way pulse generation works is to preload a # of "low time" ticks into the count register. Then every source edge will decrement the count. When the count reaches terminal count (0), the counter's output is toggled (or can be configured to pulse). The register is then loaded with the # of "high time" ticks and the process continues.
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You can conceivably do a similar thing with a 6601, but I'm pretty sure you'd need 2 counters working together to get it working.
-Kevin P

Can vector CANoe software can be used to integrate with NI XNET?

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_Ventakesswaran

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Eric M. - Application Engineering Specialist
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I would like to know if it is posible to create an architecture with Windows Server 2012 R2 configuring VDIs and use these VDIs with my old hardware. I would like to boot my old machines using PXE directly from the VDI images so i dont need to install any
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http://ryanmangansitblog.com/2013/03/18/creating-a-windows-thinpc-thin-client/
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Blog:
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Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

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Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
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Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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