I2S controller configuration. More...

#include <qm_i2s.h>

Data Fields
qm_dma_channel_id_t	dma_channel
	DMA controller Channel ID.

qm_i2s_audio_stream_t	audio_stream
	I2S audio stream identifier.

qm_i2s_audio_format_t	audio_format
	I2S audio format configuration.

qm_i2s_master_slave_t	master_slave
	I2S Master or Slave configuration.

qm_i2s_sample_resolution_t	sample_resolution
	Sampling resolution.

qm_i2s_audio_rate_t	audio_rate
	Audio rate.

qm_i2s_buffer_mode_t	audio_buff_cfg
	Terminated link list or ring buffer configuration.

uint32_t	block_size
	DMA block size configuration: The source and destination transfer width is 32-bits for I2S. More...

uint32_t	num_dma_links
	Total number of DMA links. More...

qm_dma_lli_item_t *	dma_link
	Pointer to the DMA link list.

uint32_t	num_buffer_links
	Number of buffer links in the ring buffer. More...

qm_i2s_buffer_link_t *	buffer_link
	Ring buffer head pointer. More...

uint32_t	num_dma_link_per_buffer
	Number of DMA links per audio buffer. More...

uint32_t	buffer_len
	Length of a buffer in the ring buffer. More...

uint32_t	afull_thresh
	TX/RX almost full threshold. More...

uint32_t	aempty_thresh
	TX/RX almost empty threshold. More...

void(*	callback )(void *data, qm_i2s_status_t i2s_status)
	Transfer callback. More...

void *	callback_data
	Callback user data. More...

Detailed Description

I2S controller configuration.

Driver instantiates one of these with given parameters for each I2S channel configured using the "qm_i2s_set_channel_config" function.

Definition at line 170 of file qm_i2s.h.

Field Documentation

uint32_t qm_i2s_channel_cfg_data_t::aempty_thresh

TX/RX almost empty threshold.

Definition at line 197 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::afull_thresh

TX/RX almost full threshold.

Definition at line 196 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::block_size

DMA block size configuration: The source and destination transfer width is 32-bits for I2S.

Min = 1, Max = see DMA configuration

Definition at line 187 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::buffer_len

Length of a buffer in the ring buffer.

Definition at line 195 of file qm_i2s.h.

qm_i2s_buffer_link_t* qm_i2s_channel_cfg_data_t::buffer_link

Ring buffer head pointer.

Definition at line 192 of file qm_i2s.h.

void(* qm_i2s_channel_cfg_data_t::callback)(void *data, qm_i2s_status_t i2s_status)

Transfer callback.

Parameters

[in]	data	Callback user data
[in]	i2s_status	I2S status

Definition at line 205 of file qm_i2s.h.

void* qm_i2s_channel_cfg_data_t::callback_data

Callback user data.

Definition at line 206 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::num_buffer_links

Number of buffer links in the ring buffer.

Definition at line 191 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::num_dma_link_per_buffer

Number of DMA links per audio buffer.

Definition at line 194 of file qm_i2s.h.

uint32_t qm_i2s_channel_cfg_data_t::num_dma_links

Total number of DMA links.

Definition at line 188 of file qm_i2s.h.