i2s.h File Reference

Public APIs for the I2S (Inter-IC Sound) bus drivers. More...

#include <zephyr/types.h>
#include <zephyr/device.h>
#include <zephyr/syscalls/i2s.h>

Go to the source code of this file.

Data Structures
struct	i2s_config
	Interface configuration options. More...

Macros
#define	I2S_FMT_DATA_FORMAT_SHIFT   0
	Data Format bit field position.
#define	I2S_FMT_DATA_FORMAT_MASK   (0x7 << I2S_FMT_DATA_FORMAT_SHIFT)
	Data Format bit field mask.
#define	I2S_FMT_DATA_FORMAT_I2S   (0 << I2S_FMT_DATA_FORMAT_SHIFT)
	Standard I2S Data Format.
#define	I2S_FMT_DATA_FORMAT_PCM_SHORT   (1 << I2S_FMT_DATA_FORMAT_SHIFT)
	PCM Short Frame Sync Data Format.
#define	I2S_FMT_DATA_FORMAT_PCM_LONG   (2 << I2S_FMT_DATA_FORMAT_SHIFT)
	PCM Long Frame Sync Data Format.
#define	I2S_FMT_DATA_FORMAT_LEFT_JUSTIFIED   (3 << I2S_FMT_DATA_FORMAT_SHIFT)
	Left Justified Data Format.
#define	I2S_FMT_DATA_FORMAT_RIGHT_JUSTIFIED   (4 << I2S_FMT_DATA_FORMAT_SHIFT)
	Right Justified Data Format.
#define	I2S_FMT_DATA_ORDER_MSB   (0 << 3)
	Send MSB first.
#define	I2S_FMT_DATA_ORDER_LSB   BIT(3)
	Send LSB first.
#define	I2S_FMT_DATA_ORDER_INV   I2S_FMT_DATA_ORDER_LSB
	Invert bit ordering, send LSB first.
#define	I2S_FMT_CLK_FORMAT_SHIFT   4
	Data Format bit field position.
#define	I2S_FMT_CLK_FORMAT_MASK   (0x3 << I2S_FMT_CLK_FORMAT_SHIFT)
	Data Format bit field mask.
#define	I2S_FMT_BIT_CLK_INV   BIT(4)
	Invert bit clock.
#define	I2S_FMT_FRAME_CLK_INV   BIT(5)
	Invert frame clock.
#define	I2S_FMT_CLK_NF_NB   (0 << I2S_FMT_CLK_FORMAT_SHIFT)
	Normal Frame, Normal Bit Clk.
#define	I2S_FMT_CLK_NF_IB   (1 << I2S_FMT_CLK_FORMAT_SHIFT)
	Normal Frame, Inverted Bit Clk.
#define	I2S_FMT_CLK_IF_NB   (2 << I2S_FMT_CLK_FORMAT_SHIFT)
	Inverted Frame, Normal Bit Clk.
#define	I2S_FMT_CLK_IF_IB   (3 << I2S_FMT_CLK_FORMAT_SHIFT)
	Inverted Frame, Inverted Bit Clk.
#define	I2S_OPT_BIT_CLK_CONT   (0 << 0)
	Run bit clock continuously.
#define	I2S_OPT_BIT_CLK_GATED   BIT(0)
	Run bit clock when sending data only.
#define	I2S_OPT_BIT_CLK_MASTER   (0 << 1)
	I2S driver is bit clock master.
#define	I2S_OPT_BIT_CLK_SLAVE   BIT(1)
	I2S driver is bit clock slave.
#define	I2S_OPT_FRAME_CLK_MASTER   (0 << 2)
	I2S driver is frame clock master.
#define	I2S_OPT_FRAME_CLK_SLAVE   BIT(2)
	I2S driver is frame clock slave.
#define	I2S_OPT_LOOPBACK   BIT(7)
	Loop back mode.
#define	I2S_OPT_PINGPONG   BIT(6)
	Ping pong mode.

Typedefs
typedef uint8_t	i2s_fmt_t
	I2S data stream format options.
typedef uint8_t	i2s_opt_t
	I2S configuration options.

Enumerations
enum	i2s_dir { I2S_DIR_RX , I2S_DIR_TX , I2S_DIR_BOTH }
	I2C Direction. More...
enum	i2s_state {   I2S_STATE_NOT_READY , I2S_STATE_READY , I2S_STATE_RUNNING , I2S_STATE_STOPPING ,   I2S_STATE_ERROR }
	Interface state. More...
enum	i2s_trigger_cmd {   I2S_TRIGGER_START , I2S_TRIGGER_STOP , I2S_TRIGGER_DRAIN , I2S_TRIGGER_DROP ,   I2S_TRIGGER_PREPARE }
	Trigger command. More...

Functions
int	i2s_configure (const struct device *dev, enum i2s_dir dir, const struct i2s_config *cfg)
	Configure operation of a host I2S controller.
static const struct i2s_config *	i2s_config_get (const struct device *dev, enum i2s_dir dir)
	Fetch configuration information of a host I2S controller.
static int	i2s_read (const struct device *dev, void **mem_block, size_t *size)
	Read data from the RX queue.
int	i2s_buf_read (const struct device *dev, void *buf, size_t *size)
	Read data from the RX queue into a provided buffer.
static int	i2s_write (const struct device *dev, void *mem_block, size_t size)
	Write data to the TX queue.
int	i2s_buf_write (const struct device *dev, void *buf, size_t size)
	Write data to the TX queue from a provided buffer.
int	i2s_trigger (const struct device *dev, enum i2s_dir dir, enum i2s_trigger_cmd cmd)
	Send a trigger command.

Detailed Description

Public APIs for the I2S (Inter-IC Sound) bus drivers.