LIN Break Length

[JB]

Is it possible to change the default length (13 bits) of the LIN Break with a NI USB-8476 and the NI-CAN Frame API ?

[JB]

There is a property in NI-XNET to configure the length of the break.

Unfortunately I haven't found a similar property in the NI-CAN Frame API.

[GPIB_Guru · Accepted solution]

I am pretty sure it is supported, but it may not be documented. Try attribute 0x80020047. It should accept a similar range as the NI-XNET version.

[JB]

Many thanks for your answer ! I will try this tomorrow.

There is indeed no documentation about this attribute, neither in the NI-CAN Hardware and Software Manual nor in the help of LabVIEW.

[JB]

Sorry for my late reply due to holidays.

According to a test conducted by a colleague, this attribute has no effect on the length of the break. Could you please verify its number and if it is really supported by the NI-CAN Frame API ? Many thanks in advance.

[GPIB_Guru]

From what I can tell, that is indeed the number and it should work.

[JB]

Thank you very much.

I will make a new test myself. This is how the bus is configured.

[JB]

The "secret" 0x80020047 attribute is indeed supported by the NI-CAN Frame API and allows to change the length of the break.

Many thanks once again.

[GPIB_Guru]

 I don't think it was intended to be a secret (more likely the documentation was just forgotten). I was a bit nervous when the preliminary results indicated that it didn't work, so I do appreciate the update to let me know that it did.

[JB]

I labelled this ID "secret" because it is neither documented nor listed in the selector of the IDs.

Would it be possible to add it to the next release of the driver ?