diff options
Diffstat (limited to 'sdk-modifications/include/dma.h')
| -rw-r--r-- | sdk-modifications/include/dma.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sdk-modifications/include/dma.h b/sdk-modifications/include/dma.h new file mode 100644 index 0000000..f6ff230 --- /dev/null +++ b/sdk-modifications/include/dma.h @@ -0,0 +1,46 @@ +#ifndef __DMA_H__ +#define __DMA_H__ + +//register a DMA transfer request +//ch: channel id request, there are 6 channles, +//irq_handler: the DMA interruption handle +//arg: argument to the handle +//mode: DMA mode, such as port width, address increased/fixed, and so on +//type: DMA request type +extern int dma_request(int ch, void (*irq_handler)(unsigned int), unsigned int arg, + unsigned int mode, unsigned int type); + +//start DMA transfer, must request a DMA first +//ch: channel id +//srcAddr: DMA source address +//dstAddr: DMA destination address +//count: DMA transfer count, the total bytes due the mode in dma_request +extern void dma_start(int ch, unsigned int srcAddr, unsigned int dstAddr, + unsigned int count); + +//Stop DMA transfer +extern void dma_stop(int ch); + +//Wait DMA transfer over +extern int dma_wait_finish(int ch); + + +/* + * Copy 'size' bytes from src to dest, in blocks of 32 bytes. + * size is in bytes and must be a multiple of 32. + * Both src and dest must be aligned to 32 bytes. + * Returns 0 on failure, non-zero on success. + */ +extern int dma_copy32Byte(int ch, void *dest, void *src, unsigned int size); +// Blocks of 16 bytes, aligned to 16 bytes +extern int dma_copy16Byte(int ch, void *dest, void *src, unsigned int size); +// Blocks of 4 bytes, aligned to 4 bytes +extern int dma_copy32Bit(int ch, void *dest, void *src, unsigned int size); +// Blocks of 2 bytes, aligned to 2 bytes +extern int dma_copy16Bit(int ch, void *dest, void *src, unsigned int size); +extern int dma_isBusy(int ch); +extern int dma_isFree(int ch); +extern int dma_getFree(void); + +#endif //__DMA_H__ + |