> Can anyone tell me about DMA under RTAI. Are then any routines
> available for setting up DMA transfers under RTAI. Can you setup
> DMA using an API (called from user-space) for the hardware (example: OSS for
I don't think DMA handling would be RTAI-specific.
Standard Linux macros/functions are used to program the DMA controllers.
Sample code from my (NMT driven) task:
#include <asm/dma.h>
unsigned flags;
flags=claim_dma_lock();
disable_dma(LG_DMA_CHANNEL);
clear_dma_ff(LG_DMA_CHANNEL);
...
set_dma_mode(LG_DMA_CHANNEL, DMA_MODE_WRITE|DMA_AUTOINIT);
set_dma_count(LG_DMA_CHANNEL, count = accelveclen + LEAD_INOUT);
set_dma_addr(LG_DMA_CHANNEL, virt_to_bus(a.accelvec));
enable_dma(LG_DMA_CHANNEL);
...
release_dma_lock(flags);
Regards
Gabor
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For more information on Real-Time Linux see:
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