S32KのトピックRe: Configuring Major loop in DMA transfer list for S32K322

Configuring Major loop in DMA transfer list for S32K322

user_244572 — Tue, 21 Jan 2025 12:19:27 GMT

Hello,

I am trying to copy an int array of size[10] to another empty array of the same size.

I have configured the minor loop for a single transfer.

However, when I configure the major loop to repeat the transfer 10 times (to copy the whole array), I don't see any update.

Here is a screen shot of the current configuration:

user_244572_0-1737461762750.png

and I am using the following interfaces:

user_244572_1-1737461859783.png

1) Can you tell me what is wrong with the current configuration ?

2) How can I observe the major loop work in action ?

Thanks in advance.

davidtosenovjan — Tue, 21 Jan 2025 16:09:33 GMT

Do you have configured DMAMUX module? In RTD, it is part of RM module (Resource Manager).

user_244572 — Tue, 21 Jan 2025 16:21:16 GMT

no, I haven't configured the DMAMUX. How to configure it ?

I cannot find RM (Resource Manager) in the driver list in S32 design studio :

user_244572_0-1737476391780.png

davidtosenovjan — Wed, 22 Jan 2025 09:41:27 GMT

It is MCAL component.

There is also example code for that:

Rm_DMAMUX_Example_S32K344

user_244572 — Wed, 22 Jan 2025 10:09:14 GMT

Hi David,

I am not using MCAL.
How to configure the DMA_MUX from the Drivers layer ?

davidtosenovjan — Wed, 22 Jan 2025 13:27:40 GMT

It cannot be done in IP layer.

You can use MCAL or possibly configure DMAMUX peripheral manually by bare metal code.