imx28 DMA

[liuxing]

Does the DMA of imx28 support memory- to-memory transfer?I mean that transfer data block in DDR.

[liuxing]

If the dest and source address can be programmed,the memory to memory access can be implemented.

what's about PIOWORD?

The CMDPIOWORDS field, if nonzero,
instructs the DMA engine to copy these words to the APB, beginning at the first
register address offset for the peripheral and and incrementing the register offset each
cycle.

[igorpadykov · Accepted solution]

> address of channel 0~13 is constant.Is it right?

yes, right.

Best regards
igor

[igorpadykov]

Hi xing

I believe you are right, dma does not support memory to memory transfers.

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[liuxing]

I think the dest/source address of channel 0~13 is constant.Is it right?

If I want to access the whole physical memory,do you have a way to implement it?I wanted to implement it via DMA.

[liuxing]

Thanks a lot!

Are you sure this conclusion?what's the function of the empty channel?