topic Re: MCAL Port_Init(NULL_PTR) error in S32K

MCAL Port_Init(NULL_PTR) error

jwjung — Thu, 21 Aug 2025 01:45:05 GMT

hi,

i tried to use port driver of MCAL.

but whenever i initialize the Port Driver the error was occurred and debugger be disconnected.

and F/W seems to be working.(is that reset?)

so can you find the way do not occurred the error?

attachment

chip : NXP S32K312

RTD : SW32K3_RTD4.4_R11-21_3.0.0_DS2303

DS : S32 Design Studio for S32 Platform, Version: 3.5

Re: MCAL Port_Init(NULL_PTR) error

jwjung — Thu, 21 Aug 2025 01:54:14 GMT

run the Port_Init(NULL_PTR);

Port Configuration\ConfigTimeSupport\Config Variant\VARIANT-PRE-COMPLE.

if not, the error does not occur, but the F/W does not work either.

Re: MCAL Port_Init(NULL_PTR) error

Robin_Shen — Thu, 21 Aug 2025 04:32:05 GMT

Please check whether the debug pins are still present in the UnTouchedPortPin field.

If you refer to the S32K3 PORT Driver User Manual(RTD_PORT_UM.pdf), you will find an important note:

In order to be able to use the debug capabilities, the JTAG and Reset pins need to be configured in the Port driver using mechanism B. This means that the following pins/functionalities need to be added in the UnTouchedPortPin list:
– Reset_b having PortPin Mscr set to 5 and SIUL2 Instance set to SIUL2_0
– JTAG_TMS having PortPin Mscr set to 4 and SIUL2 Instance set to SIUL2_0
– JTAG_TDO having PortPin Mscr set to 10 and SIUL2 Instance set to SIUL2_0
– JTAG_TCK having PortPin Mscr set to 68 and SIUL2 Instance set to SIUL2_0
– JTAG_TDI having PortPin Mscr set to 69 and SIUL2 Instance set to SIUL2_0

If you have modified the debug pin functionality, can you try this solution?

https://community.nxp.com/t5/S32-SDK/failed-to-power-up-dap-after-program-s32k312-with-pll0-equal/td-p/1609010

If you have also reconfigured the Reset_b pin (PTA5), the MCU can only be reset by a POR.

Best Regards,
Robin
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Re: MCAL Port_Init(NULL_PTR) error

jwjung — Thu, 21 Aug 2025 06:18:58 GMT

thanks for reply robin.

solve the error and confirm the User Manual for RTD Port Driver.

thank you.