S32K348 gpt config

youngkin — Tue, 21 Oct 2025 12:01:22 GMT

hello:

I config the gpt, the gpt clock is 40M. and I start the gpt(Gpt_StartTimer(GptConf_GptChannelConfiguration_GptChannelConfiguration_0, 10000000U);), I measure GPT time ，it is 200ms。

but i think the gpt time should be 250ms（（1/40000000） * 10000000 = 250ms)

I Set the clock of gpt as follow:

How to confirm that the clock source currently being used is an external crystal oscillator(16M)? Currently, the GPT clock seems FIRC(48M).

the mcu clock show as follow：

Please take some time to help answer, thank you !

Re: S32K348 gpt config

VaneB — Wed, 22 Oct 2025 20:18:46 GMT

Hi @youngkin

I have created a project based on the configurations you shared and tested it on the S32K3x8EVB board. I was able to successfully achieve the desired 250ms timing.

To help ensure that there are no missing configurations, initializations, or code elements, I am attaching my .mex file along with the main source file. This will allow you to compare and validate against your setup.

BR, VaneB

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S32K348 gpt config

Re: S32K348 gpt config