USB & DMA

[danieldaniel9]

Posted on June 04, 2010 at 18:10

USB & DMA

#usb-dma-str9

[kelly23]

Posted on May 17, 2011 at 10:00

Hi Daniel,

Have you found a resolution to this problem?  I am also seeking example source code and/or documentation that defines how to enable USB transfers via DMA.

-Kelly

[danieldaniel9]

Posted on May 17, 2011 at 10:00

I adjusted the linked list Control register to include the length (it wasnt there when I posted this)

  Linked_List_Descriptor_Table[3] = 0x0C480024;

-Using a fixed length string to test this for now.

From what I can tell, my DMA is not being called - I setup a TC interrupt for it, and it does not trigger.

The docs mention that it needs to see a request from the peripheral, and thats where I currently am waiting to get this to work.

If anyone has ever gotten DMA to work transmitting data please let me know. Thanks