audio_i2s.h File Reference

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

Go to the source code of this file.

Macros
#define	HFCLKAUDIO_12_288_MHZ   0x9BA6
#define	HFCLKAUDIO_12_165_MHZ   0x8FD8
#define	HFCLKAUDIO_12_411_MHZ   0xA774
#define	FRAME_SIZE_BYTES    ((CONFIG_I2S_LRCK_FREQ_HZ / 1000 * 10) * CONFIG_I2S_CH_NUM * CONFIG_AUDIO_BIT_DEPTH_OCTETS)
#define	BLOCK_SIZE_BYTES   (FRAME_SIZE_BYTES / CONFIG_FIFO_FRAME_SPLIT_NUM)
#define	I2S_SAMPLES_NUM    (BLOCK_SIZE_BYTES / (CONFIG_AUDIO_BIT_DEPTH_OCTETS) / (32 / CONFIG_AUDIO_BIT_DEPTH_BITS))

Typedefs
typedef void(*	i2s_blk_comp_callback_t) (uint32_t frame_start_ts, uint32_t *rx_buf_released, uint32_t const *tx_buf_released)
	I2S block complete event callback type.

Functions
void	audio_i2s_set_next_buf (const uint8_t *tx_buf, uint32_t *rx_buf)
	Supply the buffers to be used in the next part of the I2S transfer.
void	audio_i2s_start (const uint8_t *tx_buf, uint32_t *rx_buf)
	Start the continuous I2S transfer.
void	audio_i2s_stop (void)
	Stop the continuous I2S transfer.
void	audio_i2s_blk_comp_cb_register (i2s_blk_comp_callback_t blk_comp_callback)
	Register callback function for I2S block complete event.
void	audio_i2s_init (void)
	Initialize I2S module.