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Capturing transmitted message from PCAN-View
Posted: Tue 26. Jan 2021, 08:28
by petey293
Hello,
A quick question for you guys!
Just wondering if there's a quick and easy way to capture a sent user-generated message from PCAN-View, just the CAN ID and data content. I've done a super quick poke-around in the PCAN-Basic API, would I benefit from looking a little further into it?
Thanks in advance for the help!
Re: Capturing transmitted message from PCAN-View
Posted: Wed 27. Jan 2021, 11:32
by M.Heidemann
Hello,
Thank you for your request.
The easiest way to capture messages is to use the Trace-feature of PCAN-View,
which allows you to capture all messages present on the bus.
Sent messages will be marked as "TX" in the trace-file.
Also you can export all messages currently in your transmit list as a transmit-list file
via the File-dialogue -> "Save".
You could also use the PCANBasic-API for this purpose, if you prefer.
In this case you could write all messages transmit to a seperate file once PCANBasic
returns a successful transmission.
Maybe you could describe your usecase a bit further so i might suggest a more tailored solution to you.
Best Regards
Marvin
Re: Capturing transmitted message from PCAN-View
Posted: Sun 14. Feb 2021, 00:51
by shrutip2
I have created labview vi using pcan basic dll. I am able to read and write the messages but I am not able to capture a trace using pcan basic api.
I have set following parameters using CAN_SetValue function-
1. PCAN_TRACE_LOCATION
2. PCAN_TRACE_STATUS
3. PCAN_TRACE_SIZE
4. PCAN_TRACE_CONFIGURE
are these parameters supposed to be set in some order? Can you provide an example?
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 07:21
by M.Heidemann
Hello,
The Parameter PCAN_TRACE_STATUS is also setable,
to start the the Trace you'll have to set it ("PCANBasic.PCAN_PARAMETER_ON").
Furthermore you`ll have to make sure you are actively reading during the recording of
a trace.
So, after configuration you'll have to set the PCAN_TRACE_STATUS and make sure
PCANBAsic is reading during the recording of a trace.
Code: Select all
TPCANStatus stsResult;
uint iStatus = PCANBasic.PCAN_PARAMETER_ON;
// We activate the tracing by setting the parameter.
stsResult = PCANBasic.SetValue(PcanHandle, TPCANParameter.PCAN_TRACE_STATUS, ref iStatus, sizeof(int));
if (stsResult != TPCANStatus.PCAN_ERROR_OK)
{
ShowStatus(stsResult);
}
Please report back to us, if this has solved your issue.
Best Regards
Marvin
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 15:33
by shrutip2
I was not setting the buffer length before.
But now after setting the buffer length I am getting unknown error.
Could you please check the attachment and confirm if the values I am setting are correct or not?
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 15:51
by M.Heidemann
Hello,
Can you share a screenshot of this unknown error with us?
Best Regards
Marvin
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 16:17
by shrutip2
It’s the error code returned from CAN_SetValue function.
The error value is 65536 which signifies ‘PCAN_ERROR_UNKNOWN - Unknown error’.
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 17:05
by M.Heidemann
What exactly did you change regarding the bufferlength?
the bufferlength seems to be defined as a Uint32
as far as i can tell from your screenshot.
The length of the buffer is the size of uint32 or 4Bytes.
Please report back to us regarding this.
Best Regards
Marvin
Re: Capturing transmitted message from PCAN-View
Posted: Mon 15. Feb 2021, 17:27
by shrutip2
Earlier I was not passing any value to buffer length so I am guessing it was taking the default value as 0 and I wasn’t getting any error. But after looking at the example you provided I passed 4 as the value for buffer length and now with buffer length 4 I am getting unknown error.
Re: Capturing transmitted message from PCAN-View
Posted: Tue 16. Feb 2021, 09:09
by M.Heidemann
Do you use your own VI or
do you use a third party VI?
Best Regards
Marvin