topic DMA interrupt not triggering on S32K324 in S32K

DMA interrupt not triggering on S32K324

ilx123 — Tue, 19 Aug 2025 14:03:49 GMT

Hi everyone,

I have configured the eMIOS ICU to use DMA. But for some reason, the DMA completion notification is never entered.

emios icu config:

Rm dmamux:

IntCtrl:

And in the code:

extern void IcuChannel_3_DmaTransferCompletionNotif(void)

{

Emios_Icu_Ip_TimestampDmaProcessing(1u, 1u);

}

As to my understanding, the following should happen: edge gets detected by the ICU -> triggers DMA transfer -> IcuChannel_3_DmaTransferCompletionNotif() -> Emios_Icu_Ip_TimestampDmaProcessing() gets called -> timestamp measurement notification (SENT_INPUT1_ISR gets called). This is also the desired flow for the application I am creating.

Could it be that I misunderstood something inside the configuration of the drivers? Any help would be appreciated.

Re: DMA interrupt not triggering on S32K324

VaneB — Thu, 21 Aug 2025 17:14:43 GMT

Hi @ilx123

I recently posted a simple example code that shows how to configure eMIOS in ICU_MODE_TIMESTAMP using SAIC (Single Action Input Capture) mode with DMA. In this setup, one eMIOS channel captures timestamps from a waveform generated by another channel. After a predefined number of captures, a DMA interrupt is triggered.

Example S32K344 eMIOS Icu with DMA DS3.6 RTD 6.0.0

BR, VaneB

Re: DMA interrupt not triggering on S32K324

ilx123 — Wed, 08 Oct 2025 12:46:35 GMT

Hi @VaneB , this example works for S32K344, and I can see that interrupts are happening. However, when trying to run this on S32K324 after creating a new project with the same code and configuration, it does not work. Is there anything else I need to enable for S32K324? Does S32K344 being in lockstep mode cause any crucial differences in DMA functionality or limit posibilites? I am using RTD4.0.0.