S32K146 eDma transfer

albertoferrero — Tue, 15 Feb 2022 10:23:02 GMT

Hi all, I need to implement a dma transfer from memory to a register, triggered by a timer. The platform is a S32K146 with S32DS 3.4 and SDK 4.0.2. I tried to modify the "edma_transfer_s32k146" example in order to setup the FlexTimer FTM1 - channel 1 as a PWM generator (checking the "External Trigger" box) and setting the EDMA field "Channel Request" on EDMA_REQ_FTM1_CNANNEL_1 value.

In the source code I simply added a call to start the DMA channel

EDMA_DRV_StartChannel(dmaControllerChn0_Config.virtChnConfig);

Could someone give me any advice to make this working? Is there, on the Net, any example on using DMA driven by a timer? Should I use the TRGMUX module?

Thank you all in advance.

Alberto

Re: S32K146 eDma transfer

danielmartynek — Wed, 16 Feb 2022 09:35:36 GMT

Hello @albertoferrero,

You can refer to this example:

https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K118-FTM-PWM-DMA-S32DS-2-2/ta-p/1342183

Regards,

Daniel

S32 SDKのトピックS32K146 eDma transfer

S32K146 eDma transfer

Re: S32K146 eDma transfer