#include "hpm_wm8978.h"

Macros
#define	WM8978_I2C_SLAVE_ADDRESS1 (0x1A)

#define	WM8978_I2C_SLAVE_ADDRESS2 (0x1A)

Functions
hpm_stat_t	wm8979_init (wm8978_context_t *control)
	WM8979 initialize function. More...

hpm_stat_t	wm8978_reset (wm8978_context_t *control)
	Write register to WM8978 using I2C. More...

hpm_stat_t	wm8978_set_out_volume (wm8978_context_t *control, wm8978_out_channel_t channel, uint8_t volume)
	WM8979 set out volume function. More...

hpm_stat_t	wm8978_get_out_volume (wm8978_context_t control, wm8978_out_channel_t channel, uint8_t volume)
	WM8979 read out volume function. More...

hpm_stat_t	wm8978_set_out_mute (wm8978_context_t *control, wm8978_out_channel_t channel, bool mute)
	WM8979 set out mute. More...

hpm_stat_t	wm8978_set_mic_gain (wm8978_context_t *control, uint8_t gain)
	WM8979 set gain of mic. More...

hpm_stat_t	wm8978_set_line_gain (wm8978_context_t *control, uint8_t gain)
	WM8979 set the gain of the Line input channel. More...

hpm_stat_t	wm8978_power_down (wm8978_context_t *control)
	WM8979 enter power down mode. More...

hpm_stat_t	wm8978_cfg_audio_interface (wm8978_context_t *control, wm8978_audio_interface_t standard, wm8978_word_length_t word_len)
	Configuring the audio interface of WM8978. More...

hpm_stat_t	wm8978_cfg_audio_channel (wm8978_context_t *control, uint8_t in_flags, uint8_t out_flags)
	Configure wm8978 audio channel. More...

hpm_stat_t	wm8978_notch_filter (wm8978_context_t *control, uint16_t nfa0, uint16_t nfa1)
	setting the Notch Filter for WM8978 More...

hpm_stat_t	wm8978_ctrl_gpio1 (wm8978_context_t *control, bool value)
	Control the GPIO1 pin of WM8978 to output high or low. More...

hpm_stat_t	wm8978_write_reg (wm8978_context_t *control, uint8_t reg, uint16_t val)
	Write register to WM8978 using I2C. More...

hpm_stat_t	wm8978_read_reg (wm8978_context_t control, uint8_t reg, uint16_t val)
	Read register from WM8978 using I2C. More...

hpm_stat_t	wm8978_modify_reg (wm8978_context_t *control, uint8_t reg, uint16_t mask, uint16_t val)
	Modify some bits in the register using I2C. More...

Variables
static volatile uint16_t	wm8978_reg_val []

Macro Definition Documentation

◆ WM8978_I2C_SLAVE_ADDRESS1

#define WM8978_I2C_SLAVE_ADDRESS1 (0x1A)

◆ WM8978_I2C_SLAVE_ADDRESS2

#define WM8978_I2C_SLAVE_ADDRESS2 (0x1A)

Function Documentation

◆ wm8978_cfg_audio_channel()

hpm_stat_t wm8978_cfg_audio_channel	(	wm8978_context_t *	control,
		uint8_t	in_flags,
		uint8_t	out_flags
	)

Configure wm8978 audio channel.

Parameters

[in]	control	WM8979 control structure.
[in]	in_flags	Flags for the input channel
[in]	out_flags	Flags for the output channel

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_cfg_audio_interface()

hpm_stat_t wm8978_cfg_audio_interface	(	wm8978_context_t *	control,
		wm8978_audio_interface_t	standard,
		wm8978_word_length_t	word_len
	)

Configuring the audio interface of WM8978.

Parameters

[in]	control	WM8979 control structure.
[in]	standard	wm8978_audio_interface_t structure
[in]	word_len	wm8978_word_length_t structure

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_ctrl_gpio1()

hpm_stat_t wm8978_ctrl_gpio1	(	wm8978_context_t *	control,
		bool	value
	)

Control the GPIO1 pin of WM8978 to output high or low.

Parameters

[in]	control	WM8979 control structure.
[in]	value	output high or low. if true, it's high

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_get_out_volume()

hpm_stat_t wm8978_get_out_volume	(	wm8978_context_t *	control,
		wm8978_out_channel_t	channel,
		uint8_t *	volume
	)

WM8979 read out volume function.

Parameters

[in]	control	WM8979 control structure.
[in]	channel	out channel
[out]	volume	volume points value

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_modify_reg()

hpm_stat_t wm8978_modify_reg	(	wm8978_context_t *	control,
		uint8_t	reg,
		uint16_t	mask,
		uint16_t	val
	)

Modify some bits in the register using I2C.

Parameters

[in]	control	WM8978 control structure.
[in]	reg	The register address in WM8978.
[in]	mask	The mask code for the bits want to write. The bit you want to write should be 0.
[in]	val	Value needs to write into the register.

Return values

hpm_stat_t status_success if modify reg without any error

◆ wm8978_notch_filter()

hpm_stat_t wm8978_notch_filter	(	wm8978_context_t *	control,
		uint16_t	nfa0,
		uint16_t	nfa1
	)

setting the Notch Filter for WM8978

Note: used to suppress positive feedback of microphone sound waves to avoid howling

Parameters

[in]	control	WM8979 control structure.
[in]	nfa0	Notch Filter0 value
[in]	nfa1	Notch Filter1 value

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_power_down()

hpm_stat_t wm8978_power_down ( wm8978_context_t * control )

WM8979 enter power down mode.

Parameters

[in] control WM8979 control structure.

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_read_reg()

hpm_stat_t wm8978_read_reg	(	wm8978_context_t *	control,
		uint8_t	reg,
		uint16_t *	val
	)

Read register from WM8978 using I2C.

Parameters

[in]	reg	The register address in WM8978.
[in]	reg	The register address in WM8978.
[out]	val	Value point read to.

Return values

hpm_stat_t status_success if read reg without any error

◆ wm8978_reset()

hpm_stat_t wm8978_reset ( wm8978_context_t * control )

Write register to WM8978 using I2C.

Parameters

[in] control WM8978 control structure.

Return values

hpm_stat_t status_success if reset without any error

◆ wm8978_set_line_gain()

hpm_stat_t wm8978_set_line_gain	(	wm8978_context_t *	control,
		uint8_t	gain
	)

WM8979 set the gain of the Line input channel.

Parameters

[in]	control	WM8979 control structure.
[in]	gain	volume value, range: 0 ~ 7

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_set_mic_gain()

hpm_stat_t wm8978_set_mic_gain	(	wm8978_context_t *	control,
		uint8_t	gain
	)

WM8979 set gain of mic.

Parameters

[in]	control	WM8979 control structure.
[in]	gain	gain value, range: 0 ~ 63

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_set_out_mute()

hpm_stat_t wm8978_set_out_mute	(	wm8978_context_t *	control,
		wm8978_out_channel_t	channel,
		bool	mute
	)

WM8979 set out mute.

Parameters

[in]	control	WM8979 control structure.
[in]	channel	out channel
[in]	mute	if mute is set to true

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_set_out_volume()

hpm_stat_t wm8978_set_out_volume	(	wm8978_context_t *	control,
		wm8978_out_channel_t	channel,
		uint8_t	volume
	)

WM8979 set out volume function.

Parameters

[in]	control	WM8979 control structure.
[in]	channel	out channel
[in]	volume	volume value

Return values

hpm_stat_t status_success if set without any error

◆ wm8978_write_reg()

hpm_stat_t wm8978_write_reg	(	wm8978_context_t *	control,
		uint8_t	reg,
		uint16_t	val
	)

Write register to WM8978 using I2C.

Parameters

[in]	control	WM8978 control structure.
[in]	reg	The register address in WM8978.
[in]	val	Value needs to write into the register.

Return values

hpm_stat_t status_success if write reg without any error

◆ wm8979_init()

hpm_stat_t wm8979_init ( wm8978_context_t * control )

WM8979 initialize function.

Parameters

[in] control WM8979 control structure.

Return values

hpm_stat_t status_success if init without any error

Variable Documentation

◆ wm8978_reg_val

volatile uint16_t wm8978_reg_val[]

static

Initial value:

= {
    0x000, 0x000, 0x000, 0x000, 0x050, 0x000, 0x140, 0x000,
    0x000, 0x000, 0x000, 0x0FF, 0x0FF, 0x000, 0x100, 0x0FF,
    0x0FF, 0x000, 0x12C, 0x02C, 0x02C, 0x02C, 0x02C, 0x000,
    0x032, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
    0x038, 0x00B, 0x032, 0x000, 0x008, 0x00C, 0x093, 0x0E9,
    0x000, 0x000, 0x000, 0x000, 0x003, 0x010, 0x010, 0x100,
    0x100, 0x002, 0x001, 0x001, 0x039, 0x039, 0x039, 0x039,
}

Macros

Functions

Variables

Macro Definition Documentation

◆ WM8978_I2C_SLAVE_ADDRESS1

◆ WM8978_I2C_SLAVE_ADDRESS2

Function Documentation

◆ wm8978_cfg_audio_channel()

◆ wm8978_cfg_audio_interface()

◆ wm8978_ctrl_gpio1()

◆ wm8978_get_out_volume()

◆ wm8978_modify_reg()

◆ wm8978_notch_filter()

◆ wm8978_power_down()

◆ wm8978_read_reg()

◆ wm8978_reset()

◆ wm8978_set_line_gain()

◆ wm8978_set_mic_gain()

◆ wm8978_set_out_mute()

◆ wm8978_set_out_volume()

◆ wm8978_write_reg()

◆ wm8979_init()

Variable Documentation

◆ wm8978_reg_val