Hi, I'm developing a project with S32K116 and using NXP SDK version 4.0.1.
I want to send 16 bit data with FLEXIO SPI. But with the FLEXIO_SPI_DRV_MasterTransfer function it takes a very long time. The function takes around 20-30us in polling and interrupt mode(I'm using 48MHz HIRC).
But in the project, I need to do this as soon as possible. That's why I decided to use DMA. But the FLEXIO_SPI_DRV_MasterTransfer function takes 150us in DMA Mode. because it reconfigures DMA in every call. I moved the configuration to a separate function (includes EDMA_DRV_ConfigMultiBlockTransfer functions). I call EDMA_DRV_StartChannel and FLEXIO_SetShifterDMARequest to start communication in the loop, and call EDMA_DRV_StopChannel and FLEXIO_SetShifterDMARequest functions in FLEXIO_SPI_DRV_MasterEndDmaTransfer to stop communication. I don't disable or clear FLEXIO Shifters (do I need to?).
But I could not communicate in this way. Do you have a suggestion to shorten the transmit time? Or can you share a documentation or sample code link just for my use case of DMA?
