xMega DMA

real application

Marco
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xMega DMA

 ·  Posted: 10.07.2012 - 16:24  ·  #1
Hi all,

I'd like know if the xmega DMA can be really useful in my application.

I need fill a ram area with the values read from an I2C pheripheral
while the cpu should be free to execute other tasks.

I think the pheriperal-to-memory mode should be the one to be used,
but I have read that meanwhile the DMA is working (filling the ram), the cpu running other tasks cannot access different ram areas...

But I think that almost any task need to deal with ram,
So, where is the real advantage of the DMA mode
if a concurrent ram access is not possible ?

Thanks for your comments,
Marco
rh
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Re: xMega DMA

 ·  Posted: 12.07.2012 - 15:30  ·  #2
Hello Marco,

it seems that nobody has any XMega DMA experiences.

rolf
Marco
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Re: xMega DMA

 ·  Posted: 12.07.2012 - 17:06  ·  #3
:-) Hi Rolf
I know it's not a common problem, but I have received some answers on AVRFreaks.

Thanks anyway
Marco
Avra
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Re: xMega DMA

 ·  Posted: 15.07.2012 - 00:55  ·  #4
Marco
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Re: xMega DMA

 ·  Posted: 15.07.2012 - 10:14  ·  #5
Thank you Avra !
useful pieces of code...
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