Problem with Tx Uart DMA

12914A — Mon, 15 Dec 2025 10:07:47 GMT

Hi,

I found the Projekt attached below in the forums. It works well for the S32k144 EVB, but if i want to use it on a S32k146, it don't work.

I need to send variable length per DMA on UART1, and I wrote following function, which works fine for S32k144 but not on S32k146 what is wrong?:

void LPUART1_send_DMA(uint8_t *data, uint16_t len)

{

DMA->TCD[1].CSR &= ~DMA_TCD_CSR_DONE_MASK;

DMA->TCD[1].SADDR = (uint32_t)data;

DMA->TCD[1].CITER.ELINKNO = len;

DMA->TCD[1].BITER.ELINKNO = len;

DMA->SERQ = 1;

}

I hope anyone can help me

Best regards

Sandra

Re: Problem with Tx Uart DMA

Julián_AragónM — Mon, 15 Dec 2025 18:30:38 GMT

Did you create a new project for S32K146? Or are you uploading the same 144 application to the S32K146?

Please make sure the new project correctly configures S32K146 clocks, pins and such.

Best regards,
Julián