Data Structures

Data structures for DMIC driver. More...

Data Structures
struct	dmic_io_config_s
	DMIC I/O configuration structure. More...
struct	dmic_channel_config_s
	DMIC channel configuration structure. More...
struct	dmic_fifo_config_s
	DMIC RX FIFO configuration structure. More...
struct	dmic_dma_config_s
	Generic DMA configuration. More...
struct	dmic_data_path_config_s
	Unified DMIC data-path configuration. More...
struct	dmic_buffer_context_s
	DMIC buffer context structure. More...
struct	dmic_capability_s
	DMIC instance capability description. More...

Typedefs
typedef struct dmic_io_config_s	dmic_io_config_t
	DMIC I/O configuration structure.
typedef struct dmic_channel_config_s	dmic_channel_config_t
	DMIC channel configuration structure.
typedef struct dmic_fifo_config_s	dmic_fifo_config_t
	DMIC RX FIFO configuration structure.
typedef struct dmic_dma_config_s	dmic_dma_config_t
	Generic DMA configuration.
typedef struct dmic_data_path_config_s	dmic_data_path_config_t
	Unified DMIC data-path configuration.
typedef struct dmic_buffer_context_s	dmic_buffer_context_t
	DMIC buffer context structure.
typedef struct dmic_capability_s	dmic_capability_t
	DMIC instance capability description.
typedef void(*	dmic_event_cb_t) (dmic_instance_en instance, uint8_t channel, dmic_event_en event, uint32_t offset, uint32_t size, void *user_data)
	DMIC event callback function type.

Detailed Description

Data structures for DMIC driver.

Typedef Documentation

dmic_io_config_t

typedef struct dmic_io_config_s dmic_io_config_t

DMIC I/O configuration structure.

Holds the I/O configuration parameters for DMIC operation including sample rate, polarity, channel swap, and input phase settings.

dmic_channel_config_t

typedef struct dmic_channel_config_s dmic_channel_config_t

DMIC channel configuration structure.

Holds the channel configuration parameters including filter settings, power modes, and data transfer parameters.

dmic_fifo_config_t

typedef struct dmic_fifo_config_s dmic_fifo_config_t

DMIC RX FIFO configuration structure.

Holds the FIFO configuration parameters including almost-full threshold and interrupt enable flags for various FIFO conditions.

dmic_data_path_config_t

typedef struct dmic_data_path_config_s dmic_data_path_config_t

Unified DMIC data-path configuration.

Use this structure with dmic_config_data_path to configure data path from a single API. Buffer layout policy:

• Single-channel capture uses per-channel layout.
• Multi-channel capture uses interleaved layout. Example: ch0_s0, ch1_s0, ch0_s1, ch1_s1, ... The driver automatically selects interleaved mode when more than one channel is active.

dmic_buffer_context_t

typedef struct dmic_buffer_context_s dmic_buffer_context_t

DMIC buffer context structure.

Holds runtime buffer information for each DMIC channel including pointer, size, sample count, and available-byte metadata.

dmic_capability_t

typedef struct dmic_capability_s dmic_capability_t

DMIC instance capability description.

This structure reports the static/runtime capabilities exposed by a DMIC instance such as transfer paths, channel count, supported buffer models, and max clock information.

dmic_event_cb_t

typedef void(* dmic_event_cb_t) (dmic_instance_en instance, uint8_t channel, dmic_event_en event, uint32_t offset, uint32_t size, void *user_data)

DMIC event callback function type.

Callback function invoked for DMIC transfer-ready notifications and runtime error conditions.

Parameters

instance	DMIC instance identifier
channel	DMIC channel index
event	Event code (typically DMIC_EVENT_READ_COMPLETE for transfer-ready notification)
offset	Offset in bytes from the start of the active circular capture buffer for transfer events
size	Data size in bytes for transfer events
user_data	Pointer to user-specific data