topic Re: SDK Function execution times for each module? in S32 Design Studio

SDK Function execution times for each module?

JeorgeB — Sat, 07 Nov 2020 15:16:51 GMT

Hi.

is there any document which give SDK Function execution times?

e.g. in Flash driver and the follow function -> "FLASH_DRV_Program"

or other functions like LPSPI?

Thanks.

Re: SDK Function execution times for each module?

Robin_Shen — Mon, 09 Nov 2020 00:42:01 GMT

Hi JeorgeB,

Please refer: Measure the running time of one function on S32K
The unit of measurements of the variabile ARM_CM_DWT_CYCCNT is CORE_CLK cycles.

Best Regards,
Robin
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Re: SDK Function execution times for each module?

JeorgeB — Mon, 09 Nov 2020 04:49:48 GMT

Thanks for kind reply,

in s32kxx RM, page 2143, there is a table which says DWT in s32k142 can not be access by user application.

so, for each function we can not use this unit in runtime.

is there any document from NXP which give SDK function times? or we should measure them in debug mode and consider that in run time application?

Re: SDK Function execution times for each module?

Robin_Shen — Mon, 09 Nov 2020 06:41:20 GMT

We don't have document which give SDK Function execution times.
I think you can have a test on your board.
You can also refer: Help with the library elapsed_time for the time analysis of function

Re: SDK Function execution times for each module?

JeorgeB — Mon, 09 Nov 2020 13:29:18 GMT

unfortunately I have not access to board yet and want to know is true my opinion about DWT? (it is not possible to use DWT in run time application by CPU).

Thanks.

Re: SDK Function execution times for each module?

Robin_Shen — Wed, 11 Nov 2020 07:33:32 GMT

see how to use it directly from the application code: Cycle Counting on ARM Cortex-M with DWT