PCAN-LIN Change LIN frame data through serial commands

[Lid4936]

Hello,

I configured my PCAN-LIN IPEH-002025 as a LIN master and would like to change frame data while a scheduler table is running. Essentially, I want to be able to modify the highlighted part shown in the image below just by sending serial command because I don't have access to the PCAN-LIN configuration tool while the PCAN-LIN dongle is used in some tests.

Capture.PNG (40.08 KiB) Viewed 6645 times

I looked through the protocol manual and found no such command, the closest commands I found are:
LIN - Set Frame Length
LIN - Set Checksum Type
Neither of them actually modifies the frame data. There is also:
LIN - Set Slave ID + Data Configuration
But I think this only works in slave mode while I am in master mode.

I would appreciate if anyone can point out if I am missing something, because I know the configuration tool can do it and it is using serial commands.

Thanks

[M.Heidemann]

Hello,

Please have a look at the following post by my colleague Michael:

viewtopic.php?f=22&t=6457

The post contains a PDF showcasing different scenarios, controlling a LIN-Master
via serial is also covered.

For further questions feel free to contact me again.

Best Regards

Marvin

[Lid4936]

Hi Marvin,

Thank you for your help, I read the document you attached and per my understanding, the method described in section 3 of that PDF describes how to send a LIN frame and if it's a publisher frame, will put the lin frame data (say for frame id = 0x1) on the lin bus. However, this is temporary and if I resume a scheduler table I had configured, the data in frame 0x1 will not be the data I just sent? Is there a way to modify the default frame data in the scheduler table as well just like how it is configured in the configuration tool?

Regards

[M.Heidemann]

Hello,

Go to "Profiles Managment" and under "LIN" select "Frame-Configuration",
on the right (In the editing Pane) you should see the "Set"-option:

PCAN_LIN_CT_01.png (11.27 KiB) Viewed 6599 times

Clicking "Set" will open up the frame-configuration window, in which you can change
the length, Checksum Type and Direction, you can also set default data by double-clicking the Data-field:

PCAN_LIN_CT_02.png (32.22 KiB) Viewed 6599 times

Is this what you are refering to or did is misunderstood your request?

Please let me know.

best Regards

Marvin

[Lid4936]

Hi Marvin,

That is what I am referring but I was wondering if there are ways to do the same thing through serial and not the CT while in master mode (master status can be inactive). Essentially I would like to see if it's possible to edit the default frame data.
I think the lin write data method (through serial) can only write one lin frame but doesn't actually modify the frame data. Please correct me if that's not the case.

Thanks

[M.Heidemann]

Hello,

Please have another look at the tutorial provided by my colleague michael,
especially chapter "using PCAN-LIN as LIN Master using the internal Scheduler of PCAN-LIN:"

viewtopic.php?f=22&t=6457

In order to change the data of a running scheduler, you'll use
the "Lin"-interface and the "Set" command-group and command "Set Slave ID + Data Configuration".
with this you can change the data within the scheduler for your publisher frame.
take a look at the example provided in the document.

The "Write" command is not used in that case.

Please let us know if you have further questions.

Best Regards

Marvin