topic BCTU DMA in S32K

BCTU DMA

Ayaz — Wed, 08 Jan 2025 16:54:33 GMT

I’m working on reading ADC data using DMA. I’ve set up the DMA to trigger each time the FIFO is full, but I’m encountering an issue where the DMA only triggers once. I’m monitoring this with the Fifo1DmaComplete callback function. I’ve attached my project files. Could you help me identify the problem?

Re: BCTU DMA

Senlent — Thu, 09 Jan 2025 10:00:14 GMT

Hi@Ayaz

The usage provided by our RTD is fixed, and the DMA configuration has been completed for the user. P

lease refer to the following usage

Read ADC data from "BctuDmaFifo1" in "BctuWatermarkNotifFIFO1"

Re: BCTU DMA

Ayaz — Mon, 13 Jan 2025 14:23:09 GMT

Thanks for the info
for this specific configuration, do we need to set the handle as shown in the image below or should it be replaced by
Bctu_Ip_Bctu0Fifo1DmaComplete
Bctu_Ip_Bctu0Fifo2DmaComplete
what is the difference?

Re: BCTU DMA

Senlent — Tue, 14 Jan 2025 02:48:01 GMT

Hi@Ayaz

Yes, you are right, but the callback function for the highlighted part is incorrect, please check it carefully.

Re: BCTU DMA

Ayaz — Tue, 14 Jan 2025 07:01:28 GMT

Yes , but should this one be used

Bctu_Ip_Bctu0Fifo1DmaComplete

Bctu_Ip_Bctu0Fifo2DmaComplete

Dma0_CH1_IRQHandle
Dma0_CH16_IRQHandleWhat is the difference?

Re: BCTU DMA

Senlent — Tue, 14 Jan 2025 07:15:01 GMT

Hi@Ayaz

It is fixed，Please use the callback function below.

Dma0_CH1_IRQHandle
Dma0_CH16_IRQHandle

Those two function will be called again in the program.

Bctu_Ip_Bctu0Fifo1DmaComplete
Bctu_Ip_Bctu0Fifo2DmaComplete