I2S driver APIs

I2S driver APIs. More...

Data Structures
struct	i2s_config
	I2S config. More...
struct	i2x_transfer_config
	I2S transfer config. More...

Macros
#define	I2S_DATA_LINE_0   (0U)
	I2S data line. More...
#define	I2S_DATA_LINE_1   (1U)
#define	I2S_DATA_LINE_2   (2U)
#define	I2S_DATA_LINE_3   (3U)
#define	I2S_DATA_LINE_MAX   I2S_DATA_LINE_3

Typedefs
typedef struct i2s_config	i2s_config_t
	I2S config. More...
typedef struct i2x_transfer_config	i2s_transfer_config_t
	I2S transfer config. More...

Enumerations
enum	i2s_irq_mask_t { i2s_tx_fifo_threshold_irq_mask = I2S_CTRL_TXDNIE_MASK , i2s_rx_fifo_threshold_irq_mask = I2S_CTRL_RXDAIE_MASK , i2s_fifo_error_irq_mask = I2S_CTRL_ERRIE_MASK }
enum	i2s_data_line_stat_t { i2s_data_line_rx_fifo_avail = 1U , i2s_data_line_tx_fifo_avail = 2U , i2s_data_line_rx_fifo_overrun = 4U , i2s_data_line_tx_fifo_underrun = 8U }

Functions
static void	i2s_enable_tdm (I2S_Type *ptr)
	enable TDM More...
static void	i2s_disable_tdm (I2S_Type *ptr)
	disable TDM More...
static void	i2s_update_rx_fifo_threshold (I2S_Type *ptr, uint8_t threshold)
	update rx fifo threshold More...
static void	i2s_update_tx_fifo_threshold (I2S_Type *ptr, uint8_t threshold)
	update tx fifo threshold More...
static void	i2s_ungate_bclk (I2S_Type *ptr)
	open BCLK More...
static void	i2s_gate_bclk (I2S_Type *ptr)
	gete off BCLK More...
static void	i2s_ungate_mclk (I2S_Type *ptr)
	open MCLK More...
static void	i2s_gate_mclk (I2S_Type *ptr)
	gate off MCLK More...
static void	i2s_enable_tx_dma_request (I2S_Type *ptr)
	enable TX dma request More...
static void	i2s_disable_tx_dma_request (I2S_Type *ptr)
	disable TX dma request More...
static void	i2s_enable_rx_dma_request (I2S_Type *ptr)
	enable RX dma request More...
static void	i2s_disable_rx_dma_request (I2S_Type *ptr)
	disable RX dma request More...
static void	i2s_enable_irq (I2S_Type *ptr, uint32_t mask)
	enable IRQ More...
static void	i2s_disable_irq (I2S_Type *ptr, uint32_t mask)
	disable IRQ More...
static void	i2s_enable (I2S_Type *ptr)
	I2S enable. More...
static void	i2s_disable (I2S_Type *ptr)
	I2S disable. More...
static void	i2s_start (I2S_Type *ptr)
	I2S start. More...
static void	i2s_stop (I2S_Type *ptr)
	I2S stop. More...
static void	i2s_enable_rx (I2S_Type *ptr, uint8_t rx_mask)
	I2S enable rx function. More...
static void	i2s_disable_rx (I2S_Type *ptr, uint8_t rx_mask)
	I2S disable rx function. More...
static void	i2s_enable_tx (I2S_Type *ptr, uint8_t tx_mask)
	I2S enable tx function. More...
static void	i2s_disable_tx (I2S_Type *ptr, uint8_t tx_mask)
	I2S disbale tx function. More...
static void	i2s_reset_clock_gen (I2S_Type *ptr)
	I2S reset clock generator. More...
static void	i2s_reset_tx (I2S_Type *ptr)
	I2S reset tx function. More...
static void	i2s_reset_rx (I2S_Type *ptr)
	I2S reset rx function. More...
static void	i2s_reset_tx_rx (I2S_Type *ptr)
	I2S reset tx and rx function. More...
void	i2s_reset_all (I2S_Type *ptr)
	I2S reset tx/rx and clock generator module. More...
static uint32_t	i2s_get_tx_fifo_level (I2S_Type *ptr)
	I2S get tx fifo level. More...
static uint32_t	i2s_get_tx_line_fifo_level (I2S_Type *ptr, uint8_t line)
	I2S get data line tx fifo level. More...
static uint32_t	i2s_get_rx_fifo_level (I2S_Type *ptr)
	I2S get rx fifo level. More...
static uint32_t	i2s_get_rx_line_fifo_level (I2S_Type *ptr, uint8_t line)
	I2S get data line rx fifo level. More...
static uint32_t	i2s_check_data_line_status (I2S_Type *ptr, uint8_t line)
	Check I2S data line status. More...
static uint32_t	i2s_get_irq_status (I2S_Type *ptr)
	I2S get IRQ status. More...
static void	i2s_stop_transfer (I2S_Type *ptr)
	I2S stop transfer. More...
hpm_stat_t	i2s_config_tx (I2S_Type *ptr, uint32_t mclk_in_hz, i2s_transfer_config_t *config)
	I2S config tx. More...
hpm_stat_t	i2s_config_tx_slave (I2S_Type *ptr, i2s_transfer_config_t *config)
	I2S config tx for slave. More...
hpm_stat_t	i2s_config_rx (I2S_Type *ptr, uint32_t mclk_in_hz, i2s_transfer_config_t *config)
	I2S config rx. More...
hpm_stat_t	i2s_config_rx_slave (I2S_Type *ptr, i2s_transfer_config_t *config)
	I2S config rx for slave. More...
hpm_stat_t	i2s_config_transfer (I2S_Type *ptr, uint32_t mclk_in_hz, i2s_transfer_config_t *config)
	I2S config transfer. More...
hpm_stat_t	i2s_config_transfer_slave (I2S_Type *ptr, i2s_transfer_config_t *config)
	I2S config transfer for slave. More...
static void	i2s_send_data (I2S_Type *ptr, uint8_t tx_line_index, uint32_t data)
	I2S send data. More...
static void	i2s_receive_data (I2S_Type *ptr, uint8_t rx_line_index, uint32_t *data)
	I2S receive data. More...
uint32_t	i2s_send_buff (I2S_Type *ptr, uint8_t tx_line_index, uint8_t samplebits, uint8_t *src, uint32_t size)
	I2S send data in buff. More...
uint32_t	i2s_receive_buff (I2S_Type *ptr, uint8_t rx_line_index, uint8_t samplebits, uint8_t *dst, uint32_t size)
	I2S receive data in buff. More...
void	i2s_get_default_config (I2S_Type *ptr, i2s_config_t *config)
	I2S get default config. More...
void	i2s_init (I2S_Type *ptr, i2s_config_t *config)
	I2S initialization. More...
void	i2s_get_default_transfer_config_for_pdm (i2s_transfer_config_t *transfer)
	I2S get default transfer config for pdm. More...
void	i2s_get_default_transfer_config_for_dao (i2s_transfer_config_t *transfer)
	I2S get default transfer config for dao. More...
void	i2s_get_default_transfer_config (i2s_transfer_config_t *transfer)
	I2S get default transfer config. More...
hpm_stat_t	i2s_fill_tx_dummy_data (I2S_Type *ptr, uint8_t data_line, uint8_t data_count)
	I2S fill dummy data into TX fifo. More...

Detailed Description

I2S driver APIs.

Macro Definition Documentation

I2S_DATA_LINE_0

#define I2S_DATA_LINE_0   (0U)

#include <drivers/inc/hpm_i2s_drv.h>

I2S data line.

I2S_DATA_LINE_1

#define I2S_DATA_LINE_1   (1U)

#include <drivers/inc/hpm_i2s_drv.h>

I2S_DATA_LINE_2

#define I2S_DATA_LINE_2   (2U)

#include <drivers/inc/hpm_i2s_drv.h>

I2S_DATA_LINE_3

#define I2S_DATA_LINE_3   (3U)

#include <drivers/inc/hpm_i2s_drv.h>

I2S_DATA_LINE_MAX

#define I2S_DATA_LINE_MAX   I2S_DATA_LINE_3

#include <drivers/inc/hpm_i2s_drv.h>

Typedef Documentation

i2s_config_t

typedef struct i2s_config i2s_config_t

#include <drivers/inc/hpm_i2s_drv.h>

I2S config.

i2s_transfer_config_t

typedef struct i2x_transfer_config i2s_transfer_config_t

#include <drivers/inc/hpm_i2s_drv.h>

I2S transfer config.

Enumeration Type Documentation

i2s_data_line_stat_t

enum i2s_data_line_stat_t

#include <drivers/inc/hpm_i2s_drv.h>

Enumerator
i2s_data_line_rx_fifo_avail
i2s_data_line_tx_fifo_avail
i2s_data_line_rx_fifo_overrun
i2s_data_line_tx_fifo_underrun

i2s_irq_mask_t

enum i2s_irq_mask_t

#include <drivers/inc/hpm_i2s_drv.h>

Enumerator
i2s_tx_fifo_threshold_irq_mask
i2s_rx_fifo_threshold_irq_mask
i2s_fifo_error_irq_mask

Function Documentation

i2s_check_data_line_status()

static uint32_t i2s_check_data_line_status ( I2S_Type *  ptr, uint8_t  line  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

Check I2S data line status.

Parameters

[in]	ptr	I2S base address
[in]	line	I2S data line

Return values

i2s_data_line_rx_fifo_avail	data in rx fifo >= threshold
i2s_data_line_tx_fifo_avail	data in tx fifo <= threshold
i2s_data_line_rx_fifo_overrun	rx fifo overrun occured
i2s_data_line_tx_fifo_underrun	tx fifo underrun occured

i2s_config_rx()

hpm_stat_t i2s_config_rx	(	I2S_Type *	ptr,
		uint32_t	mclk_in_hz,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config rx.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	mclk_in_hz	mclk frequency in Hz
[in]	config	i2s_transfer_config_t

Return values

hpm_stat_t

status_invalid_argument or status_success

i2s_config_rx_slave()

hpm_stat_t i2s_config_rx_slave	(	I2S_Type *	ptr,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config rx for slave.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	config	i2s_transfer_config_t

Return values

hpm_stat_t

status_invalid_argument or status_success

i2s_config_transfer()

hpm_stat_t i2s_config_transfer	(	I2S_Type *	ptr,
		uint32_t	mclk_in_hz,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config transfer.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	mclk_in_hz	mclk frequency in Hz
[in]	config	i2s_transfer_config_t

Return values

hpm_stat_t

status_invalid_argument or status_success

i2s_config_transfer_slave()

hpm_stat_t i2s_config_transfer_slave	(	I2S_Type *	ptr,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config transfer for slave.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	config	i2s_transfer_config_t

Return values

hpm_stat_t

status_invalid_argument or status_success

i2s_config_tx()

hpm_stat_t i2s_config_tx	(	I2S_Type *	ptr,
		uint32_t	mclk_in_hz,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config tx.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	mclk_in_hz	mclk frequency in Hz
[in]	config	i2s_transfer_config_t

Return values

hpm_stat_t

status_invalid_argument or status_success

i2s_config_tx_slave()

hpm_stat_t i2s_config_tx_slave	(	I2S_Type *	ptr,
		i2s_transfer_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S config tx for slave.

Note

This API will disable I2S and configure parameters, could call i2s_enable() to enable I2S

Parameters

[in]	ptr	I2S base address
[in]	config	i2s_transfer_config_t

i2s_disable()

static void i2s_disable ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S disable.

Note

dropped API, please use i2s_stop

Parameters

[in]

ptr

I2S base address

i2s_disable_irq()

static void i2s_disable_irq ( I2S_Type *  ptr, uint32_t  mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

disable IRQ

Parameters

[in]	ptr	I2S base address
[in]	mask	irq bit mask

i2s_disable_rx()

static void i2s_disable_rx ( I2S_Type *  ptr, uint8_t  rx_mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S disable rx function.

Parameters

[in]	ptr	I2S base address
[in]	rx_mask	rx data line mask

i2s_disable_rx_dma_request()

static void i2s_disable_rx_dma_request ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

disable RX dma request

Parameters

[in]

ptr

I2S base address

i2s_disable_tdm()

static void i2s_disable_tdm ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

disable TDM

Parameters

[in]

ptr

I2S base address

i2s_disable_tx()

static void i2s_disable_tx ( I2S_Type *  ptr, uint8_t  tx_mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S disbale tx function.

Parameters

[in]	ptr	I2S base address
[in]	tx_mask	tx data line mask

i2s_disable_tx_dma_request()

static void i2s_disable_tx_dma_request ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

disable TX dma request

Parameters

[in]

ptr

I2S base address

i2s_enable()

static void i2s_enable ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S enable.

Note

dropped API, please use i2s_start

Parameters

[in]

ptr

I2S base address

i2s_enable_irq()

static void i2s_enable_irq ( I2S_Type *  ptr, uint32_t  mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

enable IRQ

Parameters

[in]	ptr	I2S base address
[in]	mask	irq bit mask

i2s_enable_rx()

static void i2s_enable_rx ( I2S_Type *  ptr, uint8_t  rx_mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S enable rx function.

Parameters

[in]	ptr	I2S base address
[in]	rx_mask	rx data line mask

i2s_enable_rx_dma_request()

static void i2s_enable_rx_dma_request ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

enable RX dma request

Parameters

[in]

ptr

I2S base address

i2s_enable_tdm()

static void i2s_enable_tdm ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

enable TDM

Parameters

[in]

ptr

I2S base address

i2s_enable_tx()

static void i2s_enable_tx ( I2S_Type *  ptr, uint8_t  tx_mask  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S enable tx function.

Parameters

[in]	ptr	I2S base address
[in]	tx_mask	tx data line mask

i2s_enable_tx_dma_request()

static void i2s_enable_tx_dma_request ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

enable TX dma request

Parameters

[in]

ptr

I2S base address

i2s_fill_tx_dummy_data()

hpm_stat_t i2s_fill_tx_dummy_data	(	I2S_Type *	ptr,
		uint8_t	data_line,
		uint8_t	data_count
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S fill dummy data into TX fifo.

Note

workaround: fill dummy data into TX fifo to avoid TX underflow during tx start

Parameters

[in]	ptr	I2S base address
[in]	data_line	data line
[in]	data_count	dummy data count, This value should be the same as the number of audio channels

Return values

status_success

if no error occurred

i2s_gate_bclk()

static void i2s_gate_bclk ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

gete off BCLK

Parameters

[in]

ptr

I2S base address

i2s_gate_mclk()

static void i2s_gate_mclk ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

gate off MCLK

Parameters

[in]

ptr

I2S base address

i2s_get_default_config()

void i2s_get_default_config	(	I2S_Type *	ptr,
		i2s_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S get default config.

Parameters

[in]	ptr	I2S base address
[out]	config	i2s_config_t

i2s_get_default_transfer_config()

void i2s_get_default_transfer_config

(

i2s_transfer_config_t *

transfer

)

#include <drivers/inc/hpm_i2s_drv.h>

I2S get default transfer config.

Parameters

[out]

transfer

i2s_transfer_config_t

i2s_get_default_transfer_config_for_dao()

void i2s_get_default_transfer_config_for_dao

(

i2s_transfer_config_t *

transfer

)

#include <drivers/inc/hpm_i2s_drv.h>

I2S get default transfer config for dao.

Parameters

[out]

transfer

i2s_transfer_config_t

i2s_get_default_transfer_config_for_pdm()

void i2s_get_default_transfer_config_for_pdm

(

i2s_transfer_config_t *

transfer

)

#include <drivers/inc/hpm_i2s_drv.h>

I2S get default transfer config for pdm.

Parameters

[out]

transfer

i2s_transfer_config_t

i2s_get_irq_status()

static uint32_t i2s_get_irq_status ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S get IRQ status.

Parameters

[in]

ptr

I2S base address

Return values

I2S	STA register value

i2s_get_rx_fifo_level()

static uint32_t i2s_get_rx_fifo_level ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S get rx fifo level.

Parameters

[in]

ptr

I2S base address

Return values

I2S	rx fifo level

i2s_get_rx_line_fifo_level()

static uint32_t i2s_get_rx_line_fifo_level ( I2S_Type *  ptr, uint8_t  line  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S get data line rx fifo level.

Parameters

[in]	ptr	I2S base address
[in]	line	I2S data line

Return values

I2S	data line rx fifo level

i2s_get_tx_fifo_level()

static uint32_t i2s_get_tx_fifo_level ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S get tx fifo level.

Parameters

[in]

ptr

I2S base address

Return values

I2S	tx fifo level

i2s_get_tx_line_fifo_level()

static uint32_t i2s_get_tx_line_fifo_level ( I2S_Type *  ptr, uint8_t  line  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S get data line tx fifo level.

Parameters

[in]	ptr	I2S base address
[in]	line	I2S data line

Return values

I2S	data line tx fifo level

i2s_init()

void i2s_init	(	I2S_Type *	ptr,
		i2s_config_t *	config
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S initialization.

Parameters

[in]	ptr	I2S base address
[in]	config	i2s_config_t

i2s_receive_buff()

uint32_t i2s_receive_buff	(	I2S_Type *	ptr,
		uint8_t	rx_line_index,
		uint8_t	samplebits,
		uint8_t *	dst,
		uint32_t	size
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S receive data in buff.

Parameters

[in]	ptr	I2S base address
[in]	rx_line_index	data line
[in]	samplebits	audio data width
[out]	dst	target data buff
[in]	size	data size

Return values

I2S	sent data size in byte

i2s_receive_data()

static void i2s_receive_data ( I2S_Type *  ptr, uint8_t  rx_line_index, uint32_t *  data  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S receive data.

Parameters

[in]	ptr	I2S base address
[in]	rx_line_index	data line
[out]	data	point to store data address

i2s_reset_all()

void i2s_reset_all

(

I2S_Type *

ptr

)

#include <drivers/inc/hpm_i2s_drv.h>

I2S reset tx/rx and clock generator module.

Note

This API will disable I2S, reset tx/rx and clock generator module This function uses an internal clock to generate BCLK, then do reset operation, and finally restores the previous clock settings

Parameters

[in]

ptr

I2S base address

i2s_reset_clock_gen()

static void i2s_reset_clock_gen ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S reset clock generator.

Parameters

[in]

ptr

I2S base address

i2s_reset_rx()

static void i2s_reset_rx ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S reset rx function.

Note

This API will disable I2S, reset rx function Please ensure that there is a valid BCLK when calling this function

Parameters

[in]

ptr

I2S base address

i2s_reset_tx()

static void i2s_reset_tx ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S reset tx function.

Note

This API will disable I2S, reset tx function Please ensure that there is a valid BCLK when calling this function

Parameters

[in]

ptr

I2S base address

i2s_reset_tx_rx()

static void i2s_reset_tx_rx ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S reset tx and rx function.

Note

This API will disable I2S, reset tx/rx function Please ensure that there is a valid BCLK when calling this function

Parameters

[in]

ptr

I2S base address

i2s_send_buff()

uint32_t i2s_send_buff	(	I2S_Type *	ptr,
		uint8_t	tx_line_index,
		uint8_t	samplebits,
		uint8_t *	src,
		uint32_t	size
	)

#include <drivers/inc/hpm_i2s_drv.h>

I2S send data in buff.

Parameters

[in]	ptr	I2S base address
[in]	tx_line_index	data line
[in]	samplebits	audio data width
[in]	src	source data buff
[in]	size	data size

Return values

I2S	sent data size in byte

i2s_send_data()

static void i2s_send_data ( I2S_Type *  ptr, uint8_t  tx_line_index, uint32_t  data  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S send data.

Parameters

[in]	ptr	I2S base address
[in]	tx_line_index	data line
[in]	data	data to be written

i2s_start()

static void i2s_start ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S start.

Parameters

[in]

ptr

I2S base address

i2s_stop()

static void i2s_stop ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S stop.

Parameters

[in]

ptr

I2S base address

i2s_stop_transfer()

static void i2s_stop_transfer ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

I2S stop transfer.

Parameters

[in]

ptr

I2S base address

i2s_ungate_bclk()

static void i2s_ungate_bclk ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

open BCLK

Parameters

[in]

ptr

I2S base address

i2s_ungate_mclk()

static void i2s_ungate_mclk ( I2S_Type *  ptr )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

open MCLK

Parameters

[in]

ptr

I2S base address

i2s_update_rx_fifo_threshold()

static void i2s_update_rx_fifo_threshold ( I2S_Type *  ptr, uint8_t  threshold  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

update rx fifo threshold

Parameters

[in]	ptr	I2S base address
[in]	threshold	fifo threshold value

i2s_update_tx_fifo_threshold()

static void i2s_update_tx_fifo_threshold ( I2S_Type *  ptr, uint8_t  threshold  )

inlinestatic

#include <drivers/inc/hpm_i2s_drv.h>

update tx fifo threshold

Parameters

[in]	ptr	I2S base address
[in]	threshold	fifo threshold value