topic eDMA EDMA_TRANSFER_SIZE_16B error in S32K

eDMA EDMA_TRANSFER_SIZE_16B error

hicensezhang — Tue, 15 Mar 2022 02:02:59 GMT

when I create a new project from example edma_transfer_s32k144, I wang to transfer 16B , so I change

transferConfig.srcTransferSize = EDMA_TRANSFER_SIZE_4B;

transferConfig.destTransferSize = EDMA_TRANSFER_SIZE_4B;

transferConfig.srcTransferSize = EDMA_TRANSFER_SIZE_16B;

transferConfig.destTransferSize = EDMA_TRANSFER_SIZE_16B;

But the dstData displays all zero not the srcData content

could you help it? thank you

davidtosenovjan — Tue, 15 Mar 2022 08:56:34 GMT

Hi, have you changed MINOR_LOOP_BYTE_COUNT as well?

hicensezhang — Wed, 16 Mar 2022 04:04:55 GMT

I only change the

transferConfig.srcTransferSize = EDMA_TRANSFER_SIZE_4B;
transferConfig.destTransferSize = EDMA_TRANSFER_SIZE_4B;

transferConfig.srcTransferSize = EDMA_TRANSFER_SIZE_16B;
transferConfig.destTransferSize = EDMA_TRANSFER_SIZE_16B;

, others has no change.

davidtosenovjan — Tue, 22 Mar 2022 10:14:53 GMT

And that's exactly the mistake if I understand what you want to do.