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How use DMA under uClinux ?

Altera_Forum
Honored Contributor II
‎07-21-2009 06:58 PM
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Hi all, I want to use the dma controller under my programm in uClinux. Do I use this (http://www.altera.com/literature/hb/nios2/n2sw_nii52010.pdf) ? Doesn't uClinux offer any functions ? If I'll have to use the HAL API, I 'm forced to use nios-ide ? Thanks in advice.

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Altera_Forum
Honored Contributor II
‎07-21-2009 07:27 PM
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DMA can only be used in a Kernel driver, but not in a userland program. AFAIK, the Altera HAL stuff can't be used with Linux. 

 

Of course there are the appropriate macros/functions that allow for easily handling DMA. Same provide a portable access to DMA data memory (non cached, ...), quite independently of the architecture. Maybe you can use the TSA Ethernet driver sourcecode as a reference.  

 

-Michael
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