7.1.4.6 audio_dma_add_buffer
Schedule a non-blocking read or write operation.
int32_t audio_dma_add_buffer(
struct audio_dma_descriptor *const desc,
enum audio_dir dir,
audio_buffer_handler_t handler,
void * buf,
uint32_t size
)
This function schedules a non-blocking read or write operation. The function adds the requests to the hardware instance queue and returns immediately.
Parameters
- desc
-
Type: struct audio_dma_descriptor Struct *const
Pointer to the audio driver descriptor
- dir
-
Type: enum audio_dir Enum
Identifies add the buffer to read or write queue
- handler
-
Type: audio_buffer_handler_t typedef
Pointer the return buffer handle
- buf
-
Type: void *
Buffer where the read or write data will be stored
- size
-
Type: uint32_t
Buffer size in bytes
Returns
Type: int32_t
The state of the buffer operation.
- ERR_NONE
-
Schedule buffer operation success
- ERR_NO_RESOURCE
-
Buffer queue was full