Experiencing issues in monitoring the lin signals through RX and TX pins on the S32K116 EVB.

[santhosh23]

Hello all,
I'm currently working on LIN protocol with S32K116 EVB, I cannot see any signals coming from RX and TX pins which is configured for LPUART1 for the example S32K1xx SDK RTM v4.0.3 Example Projects --> lin_slave_s32k116. 
I'm using S32 DS 3.4 version software, have revB board and did the following hardware configuration:
* Connected 12 V external supply and changed jumper J107 to 1-2(Default).
*Removed jumper J108 as it is in not in master mode.
*Connected lin bus line, Gnd and 12 V for lin communication peripherals for NXP EVB as shown in below image.

Am I missing something in order to see the signals coming through rx and tx pins?
Any Suggestion or help would be highly appreciated!

Thanks & regards,
Santhosh

[danielmartynek]

Hi @santhosh23,

Just to be sure, you see the signal at J11.1 (LIN) with dominant state < 0.4*VBAT, but you don't see anything at TP519/TP520, while TJA1027T is powered and LIN_SLP = 5V. What is the revision number of the board?

BR, Daniel

[santhosh23]

Hello @danielmartynek ,
Yes, you are right and my revision board number is S32K116EVB2Q048.
Is there anything else I forgot to include?

Thanks & regards,
Santhosh

[santhosh23 · Accepted solution]

Hello all,
I found a solution to my problem with the LIN protocol, and I hope this helps anyone who is working with it for the first time. The issue was with the UART configuration on my board. Initially it was set to the UART pins to PTC 6 and 7, but they should have been set to PTC 8 and 9. Once I corrected the pin configuration, everything started working as expected.

Thanks & regards,
Santhosh