dmic.h File Reference

Public API header file for Digital Microphones. More...

#include <zephyr/kernel.h>
#include <zephyr/device.h>

Go to the source code of this file.

Data Structures
struct	pdm_io_cfg
	PDM Input/Output signal configuration. More...
struct	pcm_stream_cfg
	Configuration of the PCM streams to be output by the PDM hardware. More...
struct	pdm_chan_cfg
	Mapping/ordering of the PDM channels to logical PCM output channel. More...
struct	dmic_cfg
	Input configuration structure for the DMIC configuration API. More...

Enumerations
enum	dmic_state {   DMIC_STATE_UNINIT , DMIC_STATE_INITIALIZED , DMIC_STATE_CONFIGURED , DMIC_STATE_ACTIVE ,   DMIC_STATE_PAUSED , DMIC_STATE_ERROR }
	DMIC driver states. More...
enum	dmic_trigger {   DMIC_TRIGGER_STOP , DMIC_TRIGGER_START , DMIC_TRIGGER_PAUSE , DMIC_TRIGGER_RELEASE ,   DMIC_TRIGGER_RESET }
	DMIC driver trigger commands. More...
enum	pdm_lr { PDM_CHAN_LEFT , PDM_CHAN_RIGHT }
	PDM Channels LEFT / RIGHT. More...

Functions
static uint32_t	dmic_build_channel_map (uint8_t channel, uint8_t pdm, enum pdm_lr lr)
	Build the channel map to populate struct pdm_chan_cfg.
static void	dmic_parse_channel_map (uint32_t channel_map_lo, uint32_t channel_map_hi, uint8_t channel, uint8_t *pdm, enum pdm_lr *lr)
	Helper function to parse the channel map in pdm_chan_cfg.
static uint32_t	dmic_build_clk_skew_map (uint8_t pdm, uint8_t skew)
	Build a bit map of clock skew values for each PDM channel.
static int	dmic_configure (const struct device *dev, struct dmic_cfg *cfg)
	Configure the DMIC driver and controller(s)
static int	dmic_trigger (const struct device *dev, enum dmic_trigger cmd)
	Send a command to the DMIC driver.
static int	dmic_read (const struct device *dev, uint8_t stream, void **buffer, size_t *size, int32_t timeout)
	Read received decimated PCM data stream.

Detailed Description

Public API header file for Digital Microphones.

This file contains the Digital Microphone APIs