topic Re: Option bit/byte in S32k312 in S32K

Option bit/byte in S32k312

shivakrishna — Thu, 31 Aug 2023 16:06:15 GMT

Hello NXP team,

i am working on S32k312 controller, in that i want to use option bit/Byte .

can you provide option bit information in that controller.

requesting to help me to provide the option bit/byte related register information

Re: Option bit/byte in S32k312

davidtosenovjan — Fri, 01 Sep 2023 10:06:09 GMT

Can you please explain the context of this question? I'm not entirely clear what it's about.

Thanks

Re: Option bit/byte in S32k312

shivakrishna — Sun, 03 Sep 2023 05:17:40 GMT

Hello NXP team,

Op Bit(Operation bit) is required to avoid the Functional resets , while doing debug. as per my project requirement developed SWT and ExtWDG . but i cant do debug because once create any breakpoint , timer overflow shall be happen and system is going to reset. to avoid this condition in debug mode i need to check the Op Bit based on this i can decide is it debug or release .

Re: Option bit/byte in S32k312

davidtosenovjan — Mon, 04 Sep 2023 12:21:15 GMT

So you want to detect in your code, whether MCU is in debug mode or not.

I have found some solution here:

https://stackoverflow.com/questions/59765691/arm-cortex-m-detect-if-debugger-is-in-run-or-debug-mode

DHCSR register contains status fields, containing information about debug state.

Re: Option bit/byte in S32k312

shivakrishna — Tue, 05 Sep 2023 14:45:14 GMT

Hello NXP team,

In S32K312 Datasheet DHCSR register not available.

and how to control(disable) External watchdog in debug mode in S32K312 controller.

Re: Option bit/byte in S32k312

davidtosenovjan — Wed, 06 Sep 2023 09:53:28 GMT

DHCSR register is described in ARM documentation, specifically in the document
DDI0403E_e_armv7m_arm.pdf

as it is pointed by
DDI0489F_cortex_m7_trm.pdf

https://developer.arm.com/documentation/ddi0489/f/?lang=en

https://developer.arm.com/documentation/ddi0403/ee/?lang=en