topic LPSPI-DMA-SDK S32K144 in S32K

LPSPI-DMA-SDK S32K144

KARTHKSARODE — Tue, 22 Mar 2022 10:06:36 GMT

https://community.nxp.com/t5/S32K/Implementing-LPIT-DMA-SPI-for-UJA1169TK-F-in-S32K144/m-p/1430149#M14496

I was trying to implement the above implementation with the help of SDK(V3.0.0) for S32K144

I could manage to configure 2 DMA channels and link it with Tx & Rx of LPSPI

Once I start both the DMA channels , It is hitting Default ISR and throwing error as shown below

But the Tx & Rx is working perfectly , I can see the expected received value in array

I'm not sure , what's causing an interrupt , help me out

I have attached the project for the reference , Let me know if there is an issue

Re: LPSPI-DMA-SDK S32K144

PetrS — Wed, 23 Mar 2022 14:15:13 GMT

Hi,

why do you add code for DMA channels init? If DMA mode is selected for LPSPI transfer all init is done when calling LPSPI_DRV_MasterTransfer function. See code for LPSPI_DRV_MasterStartTransfer function. And in fact you wrote transfers are done.

BR, Petr

Re: LPSPI-DMA-SDK S32K144

KARTHKSARODE — Thu, 24 Mar 2022 09:22:11 GMT

Hi @PetrS

Thanks for the response , Now I understood that there are 2 ways to implement LPSPI DMA SDK

Using the DMA APIs for LPSPI TDR & RDR register - Transfers are happening but in the end , it is hitting ISR(Not able to understand the cause of the issue)
Using the LPSPI transfer API
- LPSPI_DRV_MasterTransfer - Working perfectly fine , without any issues
- LPSPI_DRV_MasterTransferBlocking - Program is getting stuck in OSIF_SemaWait , from few post from NXP community , I understood the issue is because of freertos

In all the 3 methods transfers is happening perfectly , but 1st method is having issue of some interrupt
Please help me to solve that issue