topic Re: S32K376 VCU – How to implement SPI-based DIO (MSDI) in S32DS? in Model-Based Design Toolbox (MBDT)

S32K376 VCU – How to implement SPI-based DIO (MSDI) in S32DS?

schourasiya — Mon, 02 Feb 2026 06:48:59 GMT

I am working on an S32K376 VCU POC board where an MSDI device is connected over SPI.
From the schematic, the following MSDI-related signals are used:

SPI signals: MSDI_CS, MSDI_SCLK, MSDI_MOSI, MSDI_MISO
Control/status signals: MSDI_INTB, MSDI_WAKEB
Analog / mux signal: MSDI_AMUX
MSDI SGx / SPx pins used for digital inputs and outputs

I want to implement this using MBDT (Simulink) with S32 Configuration Tools (S32CT), but I am not clear on the correct software approach.

Specifically, I need guidance on:

How to configure and use the SPI pins in S32CT so that they work with an external MSDI device
How MSDI_INTB it MSDI_WAKEB should be configured (DIO vs ICU/EXTI) and handled in MBDT
How MSDI digital inputs/outputs (SGx / SPx) are expected to be accessed in software
- Is there any MCAL support pattern?
- Or should this be implemented as custom SPI commands + application-level abstraction?
How MSDI_AMUX should typically be handled (ADC path / usage expectation)

I do not have a working reference or example showing this flow using MBDT + S32CT for S32K376/96 VCU & BMS Example POC project.

Could you please suggest the recommended implementation approach (step-by-step or block-level)

Re: S32K376 VCU – How to implement SPI-based DIO (MSDI) in S32DS?

PetrS — Mon, 09 Feb 2026 08:50:28 GMT

Hi @mariuslucianand

could you please comment on this?

Thanks in advance.

BR, Petr

Re: S32K376 VCU – How to implement SPI-based DIO (MSDI) in S32DS?

schourasiya — Wed, 22 Apr 2026 10:31:07 GMT

Hello everyone,

Since no one replied, I tried multiple things on my end and found while working on the same VCU POC board using S32K396, where an external MSDI device is connected over LPSPI3. However, SPI initialization fails during runtime with a BusFault.

Observed issue

During execution of Lpspi_Ip_Init(), the code faults at:

Base->CFGR1 = PhyUnitConfigPtr->Cfgr1;

Debugger observation:

Instance = 3
Base address = 0x40364000

The register reads: VERID = 53248
PARAM = 53249
CR = 53249
SR = 53249

Followed by: BusFault: imprecise data access error
HardFault escalation: This happens on the register access to LPSPI3.

Please help with:
Which exact configuration/settings (refer to the attached) are incorrect? or
What additional settings/MBDT Blockset are required to correctly access MSDI I/O pin data?

Re: S32K376 VCU – How to implement SPI-based DIO (MSDI) in S32DS?

SorinIBancila — Wed, 29 Apr 2026 15:02:28 GMT

Hello,

Please check the following article to get help regarding the configuration of the SPI peripheral to retrieve data from the MC33CD1030 IC:

How to: MSDI MC33CD1030 on S32K396BMS-EVB using NXP MBDT

Note that the article is focused on the SPI configuration to send and receive data from the MC33CD1030 IC. For further information about the CD1030, please consult its datasheet.

Best regards,

Sorin Bancila