i.MX RT1170 - EDMA source address decrement

[theoz]

Good morning,
I'm using MIMXRT1170-EVK board and i want to know if there are the possibility to set the EDMA with a decrescent source address.
So, if i set for example source address at 0x1000 at every DMA trasfert the address decrease (0xFFC,0xFF8...). and not increse.
If there is this functionality, is possible applicate to a LSPI_EDMA transfer?
Thank a lot

[theoz]

Hi Jing,

thanks a lot.

Matteo

[jingpan · Accepted solution]

Hi @theoz ,

Yes, TCDx_SOFF register is sign-extended. If it has a negative number, the source address will decrease. It can  applicate to a LSPI_EDMA transfer.

Regards,

Jing