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DMAsetBufDesc

int DMAsetBufDesc( char chanControl, unsigned int bufLength, dma_addr_t srcAddress, dma_addr_t destAddress, dma_addr_t linkAddress, dma_addr_t bufPtr, int bufSize );

Description

This function loads a DMA buffer descriptor in memory with the values provided. The buffer needs to be described as either 12 or 16 bytes in size.

Parameters

chanControl

DMA channel control value

bufLength

DMA buffer length

srcAddress

DMA source address

destAddress

DMA destination address

linkAddress

DMA link address (of next buffer descriptor)

bufPtr

Physical address of buffer descriptor to fill

bufSize

Size of buffer descriptor in bytes (12 or 16 only)

Return Value

0: Success
-EINVAL: Error

Library

DMA.LIB

See Also

DMAloadBufDesc, DMAsetDirect