IISC provides a 5-wire, bidirectional, synchronous, digital audio link with off-chip audio devices: ISDI, ISDO, IWS, ISCK and IMCK pins.

Data Structures
struct	iisc_opt_t
	IISC configuration struct. More...

Macros
#define	IISC_DATALENGTH(x)
	! More...

#define	IISC_DATALENGTH_16 (IISC_DATALENGTH(_16) )
	Set datalength to 16 bits compact stereo (left sample in bits 15 through 0 and right samples in bits 31 through 16 of the same word) More...

#define	IISC_DATALENGTH_16C (IISC_DATALENGTH(_16C))
	Set datalength to 8 bits. More...

#define	IISC_DATALENGTH_18 (IISC_DATALENGTH(_18) )
	Set datalength to 16 bits. More...

#define	IISC_DATALENGTH_20 (IISC_DATALENGTH(_20) )
	Set datalength to 18 bits. More...

#define	IISC_DATALENGTH_24 (IISC_DATALENGTH(_24) )
	Set datalength to 20 bits. More...

#define	IISC_DATALENGTH_32 (IISC_DATALENGTH(_32) )
	Set datalength to 24 bits. More...

#define	IISC_DATALENGTH_8 (IISC_DATALENGTH(_8 ) )
	Set datalength to 8 bits compact stereo (left sample in bits 7 through 0 and right samples in bits 15 through 8 of the same word) More...

#define	IISC_DATALENGTH_8C (IISC_DATALENGTH(_8C) )

#define	IISC_RETRY_VALUE 10000

Enumerations
enum	iisc_mode { IISC_MODE_MASTER = 1, IISC_MODE_SLAVE, IISC_MODE_TDM_MASTER, IISC_MODE_TDM_SLAVE }
	IISC modes. More...

Functions
void	iisc_disable (volatile avr32_iisc_t *iisc)
	IISC Disable function. More...

static void	iisc_disable_clocks (volatile avr32_iisc_t *iisc)
	Disable the clocks for the IISC module. More...

void	iisc_disable_interrupts (volatile avr32_iisc_t *iisc, unsigned long int_mask)
	Disables the specified IISC interrupts. More...

static void	iisc_disable_reception (volatile avr32_iisc_t *iisc)
	Disable the IISC module in reception. More...

static void	iisc_disable_transmission (volatile avr32_iisc_t *iisc)
	Disable the IISC module in transmission. More...

void	iisc_enable (volatile avr32_iisc_t *iisc)
	IISC Enable function. More...

static void	iisc_enable_clocks (volatile avr32_iisc_t *iisc)
	Enable the clocks for the IISC module. More...

void	iisc_enable_interrupts (volatile avr32_iisc_t *iisc, unsigned long int_mask)
	Enables the specified IISC interrupts. More...

static void	iisc_enable_reception (volatile avr32_iisc_t *iisc)
	Enable the IISC module in reception. More...

static void	iisc_enable_transmission (volatile avr32_iisc_t *iisc)
	Enable the IISC module in transmission. More...

unsigned long	iisc_get_status (volatile avr32_iisc_t *iisc)
	Returns the IISC status. More...

status_code_t	iisc_init (volatile avr32_iisc_t *iisc, iisc_opt_t iisc_opt)
	Sets up registers and initializes IISC for use as I2S. More...

status_code_t	iisc_read (volatile avr32_iisc_t iisc, uint32_t data)
	Read a single message of data. More...

static void	iisc_reset (volatile avr32_iisc_t *iisc)
	Resets the IISC module. More...

status_code_t	iisc_write (volatile avr32_iisc_t *iisc, uint32_t data)
	Write a single message of data. More...

IISC oversampling frequency
#define	IISC_OVERSAMPLING(x)

#define	IISC_OVERSAMPLING_x16 (IISC_OVERSAMPLING(_16) )
	x16 More...

#define	IISC_OVERSAMPLING_x32 (IISC_OVERSAMPLING(_32) )
	x32 More...

#define	IISC_OVERSAMPLING_x64 (IISC_OVERSAMPLING(_64) )
	x64 More...

#define	IISC_OVERSAMPLING_x128 (IISC_OVERSAMPLING(_128) )
	x128 More...

#define	IISC_OVERSAMPLING_x256 (IISC_OVERSAMPLING(_256) )
	x256 More...

#define	IISC_OVERSAMPLING_x384 (IISC_OVERSAMPLING(_384) )
	x384 More...

#define	IISC_OVERSAMPLING_x512 (IISC_OVERSAMPLING(_512) )
	x512 More...

#define	IISC_OVERSAMPLING_x768 (IISC_OVERSAMPLING(_768) )
	x768 More...

#define	IISC_OVERSAMPLING_x1024 (IISC_OVERSAMPLING(_1024))
	x1024 More...

IISC dma configuration
#define	IISC_TXDMA_MULTIPLE

#define	IISC_TXDMA_SINGLE

#define	IISC_RXDMA_MULTIPLE

#define	IISC_RXDMA_SINGLE

IISC Format Configuration
#define	IISC_FORMAT_LJ AVR32_IISC_MR_FORMAT_LJ

#define	IISC_FORMAT_TDM_LJ AVR32_IISC_MR_FORMAT_TDM_LJ

#define IISC_DATALENGTH ( x )

Value:

(AVR32_IISC_MR_DATALENGTH##x \

<< AVR32_IISC_MR_DATALENGTH_OFFSET)

!

IISC data length configuration macro

#define IISC_DATALENGTH_16 (IISC_DATALENGTH(_16) )

Set datalength to 16 bits compact stereo (left sample in bits 15 through 0 and right samples in bits 31 through 16 of the same word)

#define IISC_DATALENGTH_16C (IISC_DATALENGTH(_16C))

Set datalength to 8 bits.

#define IISC_DATALENGTH_18 (IISC_DATALENGTH(_18) )

Set datalength to 16 bits.

#define IISC_DATALENGTH_20 (IISC_DATALENGTH(_20) )

Set datalength to 18 bits.

#define IISC_DATALENGTH_24 (IISC_DATALENGTH(_24) )

Set datalength to 20 bits.

#define IISC_DATALENGTH_32 (IISC_DATALENGTH(_32) )

Set datalength to 24 bits.

Set datalength to 32 bits

#define IISC_DATALENGTH_8 (IISC_DATALENGTH(_8 ) )

Set datalength to 8 bits compact stereo (left sample in bits 7 through 0 and right samples in bits 15 through 8 of the same word)

#define IISC_DATALENGTH_8C (IISC_DATALENGTH(_8C) )

#define IISC_FORMAT_LJ AVR32_IISC_MR_FORMAT_LJ

#define IISC_FORMAT_TDM_LJ AVR32_IISC_MR_FORMAT_TDM_LJ

#define IISC_OVERSAMPLING ( x )

Value:

(AVR32_IISC_MR_IMCKFS##x \

<< AVR32_IISC_MR_IMCKFS_OFFSET)

#define IISC_OVERSAMPLING_x1024 (IISC_OVERSAMPLING(_1024))

x1024

#define IISC_OVERSAMPLING_x128 (IISC_OVERSAMPLING(_128) )

x128

#define IISC_OVERSAMPLING_x16 (IISC_OVERSAMPLING(_16) )

x16

#define IISC_OVERSAMPLING_x256 (IISC_OVERSAMPLING(_256) )

x256

#define IISC_OVERSAMPLING_x32 (IISC_OVERSAMPLING(_32) )

x32

#define IISC_OVERSAMPLING_x384 (IISC_OVERSAMPLING(_384) )

x384

#define IISC_OVERSAMPLING_x512 (IISC_OVERSAMPLING(_512) )

x512

#define IISC_OVERSAMPLING_x64 (IISC_OVERSAMPLING(_64) )

x64

#define IISC_OVERSAMPLING_x768 (IISC_OVERSAMPLING(_768) )

x768

#define IISC_RETRY_VALUE 10000

Referenced by iisc_read(), and iisc_write().

#define IISC_RXDMA_MULTIPLE

Value:

(AVR32_IISC_MR_RXDMA_MULTIPLE << \

AVR32_IISC_MR_RXDMA_OFFSET)

#define IISC_RXDMA_SINGLE

Value:

(AVR32_IISC_MR_RXDMA_SINGLE << \

AVR32_IISC_MR_RXDMA_OFFSET)

#define IISC_TXDMA_MULTIPLE

Value:

(AVR32_IISC_MR_TXDMA_MULTIPLE << \

AVR32_IISC_MR_TXDMA_OFFSET)

#define IISC_TXDMA_SINGLE

Value:

(AVR32_IISC_MR_TXDMA_SINGLE << \

AVR32_IISC_MR_TXDMA_OFFSET)

enum iisc_mode

IISC modes.

Enumerator
IISC_MODE_MASTER
IISC_MODE_SLAVE
IISC_MODE_TDM_MASTER
IISC_MODE_TDM_SLAVE

void iisc_disable ( volatile avr32_iisc_t * iisc )

IISC Disable function.

Parameters

iisc	Pointer to the correct volatile avr32_iisc_t struct

References iisc_disable_clocks(), iisc_disable_reception(), iisc_disable_transmission(), rx_is_enabled, and tx_is_enabled.

static void iisc_disable_clocks ( volatile avr32_iisc_t * iisc )

inlinestatic

Disable the clocks for the IISC module.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_disable().

void iisc_disable_interrupts	(	volatile avr32_iisc_t *	iisc,
		unsigned long	int_mask
	)

Disables the specified IISC interrupts.

Parameters

iisc	Base address of the IISC instance.
int_mask	Bit-mask of IISC interrupts (`AVR32_IDR_x_MASK`).

References cpu_irq_restore(), and cpu_irq_save().

static void iisc_disable_reception ( volatile avr32_iisc_t * iisc )

inlinestatic

Disable the IISC module in reception.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_disable().

static void iisc_disable_transmission ( volatile avr32_iisc_t * iisc )

inlinestatic

Disable the IISC module in transmission.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_disable().

void iisc_enable ( volatile avr32_iisc_t * iisc )

IISC Enable function.

Parameters

iisc	Pointer to the correct volatile avr32_iisc_t struct

References iisc_enable_clocks(), iisc_enable_reception(), iisc_enable_transmission(), rx_is_enabled, and tx_is_enabled.

static void iisc_enable_clocks ( volatile avr32_iisc_t * iisc )

inlinestatic

Enable the clocks for the IISC module.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_enable().

void iisc_enable_interrupts	(	volatile avr32_iisc_t *	iisc,
		unsigned long	int_mask
	)

Enables the specified IISC interrupts.

Parameters

iisc	Base address of the IISC instance.
int_mask	Bit-mask of IISC interrupts (`AVR32_IER_x_MASK`).

static void iisc_enable_reception ( volatile avr32_iisc_t * iisc )

inlinestatic

Enable the IISC module in reception.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_enable().

static void iisc_enable_transmission ( volatile avr32_iisc_t * iisc )

inlinestatic

Enable the IISC module in transmission.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_enable().

unsigned long iisc_get_status ( volatile avr32_iisc_t * iisc )

Returns the IISC status.

Parameters

iisc	Base address of the IISC instance.

Returns: The IISC Status Register.

status_code_t iisc_init	(	volatile avr32_iisc_t *	iisc,
		iisc_opt_t	iisc_opt
	)

Sets up registers and initializes IISC for use as I2S.

Parameters

iisc	Pointer to the correct volatile avr32_iisc_t struct
iisc_opt	Option structure for IISC Configuration.

Returns: Status

Return values

IISC_OK	when no error occurred.
IISC_ERROR_ARGUMENT	when invalid arguments are passed

References ERR_INVALID_ARG, if(), IISC_MODE_MASTER, IISC_MODE_SLAVE, IISC_MODE_TDM_MASTER, iisc_reset(), iisc_opt_t::mode, iisc_opt_t::num_rx_channels, iisc_opt_t::num_tx_channels, iisc_opt_t::option, rx_is_enabled, STATUS_OK, and tx_is_enabled.

status_code_t iisc_read	(	volatile avr32_iisc_t *	iisc,
		uint32_t *	data
	)

Read a single message of data.

Parameters

iisc	Pointer to the correct volatile avr32_iisc_t struct
*data	The data to read

Returns: Status

Return values

IISC_OK	when no error occurred.
IISC_TIMEOUT	when a timeout occurred while trying to transfer

References ERR_TIMEOUT, IISC_RETRY_VALUE, and STATUS_OK.

static void iisc_reset ( volatile avr32_iisc_t * iisc )

inlinestatic

Resets the IISC module.

Parameters

iisc	pointer to the correct volatile avr32_iisc_t struct

Referenced by iisc_init().

status_code_t iisc_write	(	volatile avr32_iisc_t *	iisc,
		uint32_t	data
	)

Write a single message of data.

Parameters

iisc	Pointer to the correct volatile avr32_iisc_t struct
data	The data to write

Returns: Status

Return values

IISC_OK	when no error occurred.
IISC_TIMEOUT	when a timeout occurred while trying to transfer

References data, ERR_TIMEOUT, IISC_RETRY_VALUE, and STATUS_OK.

Microchip® Advanced Software Framework

Data Structures

Macros

Enumerations

Functions

IISC oversampling frequency

IISC dma configuration

IISC Format Configuration