topic daisy chain problem in S32K

daisy chain problem

Shreyas_Bhat_Karkala — Fri, 03 Jan 2025 10:16:53 GMT

Hi there,

We are currently attempting to initialize RDBMSCTBNU by leveraging the example code provided for HVBMS (HvBms400_775_722_TPL_Bring_Up) using the TPL 665a variant. The goal is to read measurement registers from the 775a. However, we are encountering an issue related to SL extraction.

The problem arises when the start measurement write operation is broadcasted to all devices simultaneously. In this scenario, SL extraction fails. Conversely, if the start measurement register is written individually for each device, the measurement values for all four AFEs become visible.

For reference, I have attached the CMU.c code with and without the implemented changes.

Best regards.

Re: daisy chain problem

Shreyas_Bhat_Karkala — Sat, 04 Jan 2025 04:11:49 GMT

I had attached the files in the previous post but it was not present so i am re attaching the code .
BR

Re: daisy chain problem

RafaR — Tue, 07 Jan 2025 22:29:34 GMT

Okay

Thanks for your interest in NXP products.

I will contact you soon, I need to check more details about the problem.

Have a great day and best of luck.

Re: daisy chain problem

Shreyas_Bhat_Karkala — Tue, 28 Jan 2025 04:06:10 GMT

The evaluation Board came with one 12 V power supply so we used a 5V power supply which came with the other evaluation kit for the AFEs , so this issue showed up , it was showing UV and was giving the Safety library(SL) issue.