DMA available for M4 on VF61 with Win CE6 on A5

Technical Support
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1

I’ve been developing an application on M4 core of VF61 and I need the DMA.
Are some of the DMA channels used by the Win CE6 image supplied by Toradex?
Or can I use all the channels on M4 core?

2

Hi,

Channels 0 to 10 and 17 to 20 of DMA1 are in use. If you plan to implement DMA on M4 I would advise you to use DMA2 so you wont have any conflicts.

3

Hi,
do you mean DMA0 and DMA1 respectively? (see attached image from VFxxx Controller Reference Manual)

428-capture.png
428-capture.png856×770 63.4 KB

4

Yes DMA1 on your pic

5

Thanks.
One more question: does the FreeRTOS for M4 use some DMA channel too?

6

Currently the FreeRTOS BSP for Vybrid’s Cortex-M4 core does not support DMA.