The QDMA Manager gives you access to the Quick DMA (QDMA) hardware that is present on certain C6000 processors. It presents a simple and efficient interface that permits all modes of operation of QDMA and supports different options for determining the completion of transfers.
This section assumes you have read and understood TI’s documentation on EDMA and QDMA, and the chapter on the EDMA manager.
Note that only one QDMA channel is supported.
The header file QDMA.H gives access to all of the functions in the QDMA module; it also includes EDMA.H.
All of the QDMA functions return a status code of the following type:
typedef enum {
QDMA_OK = 0, // success
QDMA_NOTCLAIMED = -1, // QDMA not claimed
QDMA_RANGE = -2, // illegal EDMA channel
QDMA_EDMA = -3, // EDMA already claimed
QDMA_HOW = -4 // illegal arg to Claim
} QDMA_STATUS;