S32K DMA

hajianik — Tue, 06 Jun 2017 19:29:38 GMT

Hi,

According to the reference manual (S32K144) the clock source for the DMA module is System Clock which is not gated via PCC, and yet if I comment the following line out, the code doesn't work.

PCC->PCCn[PCC_DMA0_INDEX] |= PCC_PCCn_CGC_MASK; // CGC=1: Clock enabled for DMA0

So what is going on here?

even in the design studio debugger's PERIPHERAL REGISTER view, PCC_DMA doesn't exist. This is a bit confusing .

In one of the S32K144.H variant PCC_DMA0_INDEX is defined as 8.

BUT AS I MENTIONED BEFORE there is no reference to this in the user manual or anywhere. I may be missing something.

Can someone clarify please.

Thanks,

Koorosh Hajiani

248-778-6396

Re: S32K DMA

danielmartynek — Tue, 06 Jun 2017 20:31:44 GMT

Hi,

There are differences between S32K144 v1.0 (N77P), v2.0(N47T), v2.1(N57U).

The PCC_DMA0 register should be removed from v2.0 and v2.1.

Apparently you use v1.0 (N77P) where the register must be set.

Please check what version you use.

Regards,

Daniel

topic S32K DMA in S32K

S32K DMA

Re: S32K DMA