#include <i2s_sink.h>

Data Fields
int	port
	I2S controller number (0 or 1)

int	bck_gpio
	bit clock (BCK, SCK on some boards)

int	ws_gpio
	word select (LRCK, LCK)

int	dout_gpio
	data to the DAC (DIN)

int	mclk_gpio
	master clock to the DAC, -1 when the DAC derives it from BCK

uint16_t	mclk_multiple
	MCLK / sample rate; 0 = 256 (128 above 96 kHz)

int	mute_gpio
	DAC soft-mute input (PCM5102A XSMT), -1 = none.

uint8_t	mute_active_level
	level of mute_gpio while muted (PCM5102A XSMT: 0)

int	amp_enable_gpio
	amplifier enable, high while the output is open, -1 = none

uint32_t	max_sample_rate
	highest rate the DAC takes, 0 = 192000

bool	accept_dop
	pass DoP (DSD) frames to the DAC

uint16_t	fifo_ms
	FIFO in front of the DMA at the highest rate, 0 = 200.

int8_t	feeder_core
	core of the feeder task, -1 = any

uint8_t	feeder_priority
	FreeRTOS priority, above the audio task.

const char *	dac_name
	shown by describe(), NULL = "I2S"

Field Documentation

◆ accept_dop

bool audio_i2s_config_t::accept_dop

pass DoP (DSD) frames to the DAC

◆ amp_enable_gpio

int audio_i2s_config_t::amp_enable_gpio

amplifier enable, high while the output is open, -1 = none

◆ bck_gpio

int audio_i2s_config_t::bck_gpio

bit clock (BCK, SCK on some boards)

◆ dac_name

const char* audio_i2s_config_t::dac_name

shown by describe(), NULL = "I2S"

◆ dout_gpio

int audio_i2s_config_t::dout_gpio

data to the DAC (DIN)

◆ feeder_core

int8_t audio_i2s_config_t::feeder_core

core of the feeder task, -1 = any

◆ feeder_priority

uint8_t audio_i2s_config_t::feeder_priority

FreeRTOS priority, above the audio task.

◆ fifo_ms

uint16_t audio_i2s_config_t::fifo_ms

FIFO in front of the DMA at the highest rate, 0 = 200.

◆ max_sample_rate

uint32_t audio_i2s_config_t::max_sample_rate

highest rate the DAC takes, 0 = 192000

◆ mclk_gpio

int audio_i2s_config_t::mclk_gpio

master clock to the DAC, -1 when the DAC derives it from BCK

◆ mclk_multiple

uint16_t audio_i2s_config_t::mclk_multiple

MCLK / sample rate; 0 = 256 (128 above 96 kHz)

◆ mute_active_level

uint8_t audio_i2s_config_t::mute_active_level

level of mute_gpio while muted (PCM5102A XSMT: 0)

◆ mute_gpio

int audio_i2s_config_t::mute_gpio

DAC soft-mute input (PCM5102A XSMT), -1 = none.

◆ port

int audio_i2s_config_t::port

I2S controller number (0 or 1)

◆ ws_gpio

int audio_i2s_config_t::ws_gpio

word select (LRCK, LCK)

The documentation for this struct was generated from the following file:

src/audio_player/i2s_sink.h

Data Fields