Diagnostics on LIN

[Gyula.L]

Hello,

I try to set up an UDS diagnostic tool using PLIN. I know diagnostics well, but I have some troubles to program it with PLIN.

I can't find any example how to do it, so I do try and error:
- RegisterClient
- SetFrameEntry using FrameId 0x3C as Publisher
- SetFrameEntry using FrameId 0x3D as Subscriber
- SetSchedule for MasterRequest, Delay=20 ms, the only FrameID is 0x3C; ScheduleNumber=0
- SetSchedule for SlaveResponse, Delay= 20 ms, the only FrameID is 0x3D; ScheduleNumber=1
- InitHardware
- Write a MasterRequestFrame --> this will be physically sent
- StartScheduler 1 --> I expect to see at least the frame headers sending, it does, but always with 16 seconds delay There must be somethig wrong with Delay at calling SetSchedule.

How should ist basically work? Do I need to StartSchedule=0 before I send a request and StartSchedule=1 after a sent request, expecting response?

Is there any example code available?

Gyula

[M.Maidhof]

Hello,

when working with LIN Diagnose frames, IMHO it will be better to not use the scheduler for that. We typical use a multimediatimer and use LIN_Write() to send out the 3C publisher and the 3D subscriber frame. Take care to read the frames with LIN_Read() in a loop using also a multimedia timer to be able to see the answers of your requests.

regards

Michael

[Gyula.L]

Okay fine! It works almost...

The 0x3D request will be sent, then I send the 0x7D (0x3D), and I see on the bus monitor, that the ECU has filled its payload into the frame, as I expected.
I read the response with Read() in a loop for 1 second, but the function returns always TLINError = errRcvQueueEmpty. I start the reading right after sending the 0x3D Id.
Do I need to initialize anything in order to read?

Another question, even if it works without any scheduler: I can create schedule with SetSchedule() using TLINSlotType = sltMasterRequest and sltSlaveResponse. What is the usage of these entries?

Gyula

[M.Maidhof]

Hi,

please open the filters for all messages with SetClientFilter() to be able to read all LIN frames.

About your question of TLINSlotType : please see PLIN API documentation on page 13

regards

Michael

[Gyula.L]

Hello,

I use LabVIEW 32-bit, I created a wraper around the PlinApi.dll. All functions are working, but there is an issue I can't solve.

If I call SetClientFilter() before Read(), calling the Read() function causes LabVIEW crash.

I have the following setup:
- RegisterClient()
- ConnectClient()
- SetClientFilter() : iRcvMask = 0xFFFFFFFFFFFFFFFF
- InitHardware()
- Write()
- Read() in a loop, but the first call of Read() crashes LabvIEW.

If I don't call SetClientFilter(), there is no LabVIEW crash, but the read queue is empty

I am pretty sure that I call the dll functions in the right way: stdcall, 32-bit dll, all parameter types match the prototype in the .h file. And, all other functions are working, only this one not.

I tried to exchange SetClientFilter() through RegisterFrameId(), the same crash orrurs at Read().

Any idea, what could go wrong?

[M.Maidhof]

Hi,

we can't help in any LabView related issues, but there are ready to use PLIN LabView VIs available by the company KDI/digiinst:

https://www.digiinst.de/c/software

They also offer support for their LabView drivers

regards

Michael