Audio Bitstream DAC (Digital to Analog Converter) provides functions to convert a sample value to a digital bitstream.

Data Structures
struct	abdac_config
	Configuration setting structure. More...

struct	abdac_dev_inst
	ABDAC driver software instance structure. More...

Macros
#define	ABDAC_BUSY_TIMEOUT 10000

Typedefs
typedef void(*	abdac_callback_t )(void)
	Interrupt callback function type for ABDAC. More...

typedef enum abdac_interrupt_source	abdac_interrupt_source_t
	Interrupt sources. More...

Enumerations
enum	abdac_data_format { ABDAC_DATE_32BIT = 0, ABDAC_DATE_20BIT, ABDAC_DATE_18BIT, ABDAC_DATE_16BIT, ABDAC_DATE_16BIT_COMPACT, ABDAC_DATE_8BIT, ABDAC_DATE_8BIT_COMPACT }
	Data format of the SDR register value. More...

enum	abdac_interrupt_source { ABDAC_INTERRUPT_TXRDY = 0, ABDAC_INTERRUPT_TXUR }
	Interrupt sources. More...

enum	abdac_sample_rate { ABDAC_SAMPLE_RATE_8000 = 0, ABDAC_SAMPLE_RATE_11025, ABDAC_SAMPLE_RATE_12000, ABDAC_SAMPLE_RATE_16000, ABDAC_SAMPLE_RATE_22050, ABDAC_SAMPLE_RATE_24000, ABDAC_SAMPLE_RATE_32000, ABDAC_SAMPLE_RATE_44100, ABDAC_SAMPLE_RATE_48000 }
	Supported sample rate. More...

Functions
void	abdac_clear_interrupt_flag (struct abdac_dev_inst *const dev_inst, abdac_interrupt_source_t source)
	Clear the interrupt status. More...

status_code_t	abdac_disable (struct abdac_dev_inst *const dev_inst)
	Disable the ABDAC module. More...

void	abdac_disable_interrupt (struct abdac_dev_inst *const dev_inst, abdac_interrupt_source_t source)
	Disable the interrupt. More...

status_code_t	abdac_enable (struct abdac_dev_inst *const dev_inst)
	Enable the ABDAC module. More...

void	abdac_enable_interrupt (struct abdac_dev_inst *const dev_inst, abdac_interrupt_source_t source)
	Enable the interrupt. More...

void	abdac_get_config_defaults (struct abdac_config *const cfg)
	Initialize a ABDAC configuration structure to defaults. More...

status_code_t	abdac_init (struct abdac_dev_inst const dev_inst, Abdacb const abdac, struct abdac_config *const cfg)
	Initialize the ABDAC module. More...

static bool	abdac_is_busy (struct abdac_dev_inst *const dev_inst)
	Check the busy status of ABDAC. More...

static bool	abdac_is_tx_ready (struct abdac_dev_inst *const dev_inst)
	Check the transmit ready status of ABDAC. More...

static bool	abdac_is_tx_underrun (struct abdac_dev_inst *const dev_inst)
	Check the transmit underrun status of ABDAC. More...

static uint32_t	abdac_read_interrupt_mask (struct abdac_dev_inst *const dev_inst)
	Return the ABDAC interrupts mask value. More...

void	abdac_set_callback (struct abdac_dev_inst *const dev_inst, abdac_interrupt_source_t source, abdac_callback_t callback, uint8_t irq_level)
	Set callback for ABDAC. More...

status_code_t	abdac_set_config (struct abdac_dev_inst *const dev_inst)
	Configure the ABDAC module. More...

void	abdac_set_volume0 (struct abdac_dev_inst *const dev_inst, bool mute, uint32_t volume)
	Set the volume of channel 0. More...

void	abdac_set_volume1 (struct abdac_dev_inst *const dev_inst, bool mute, uint32_t volume)
	Set the volume of channel 1. More...

status_code_t	abdac_sw_reset (struct abdac_dev_inst *const dev_inst)
	Software reset the ABDAC module. More...

status_code_t	abdac_swap_channels (struct abdac_dev_inst *const dev_inst)
	Swap the ABDAC channel output. More...

status_code_t	abdac_write_data0 (struct abdac_dev_inst *const dev_inst, uint32_t data)
	Writes the data to SDR0. More...

status_code_t	abdac_write_data1 (struct abdac_dev_inst *const dev_inst, uint32_t data)
	Writes the data to SDR1. More...

#define ABDAC_BUSY_TIMEOUT 10000

Referenced by abdac_disable(), abdac_enable(), abdac_set_config(), abdac_sw_reset(), abdac_swap_channels(), abdac_write_data0(), and abdac_write_data1().

typedef void(* abdac_callback_t)(void)

Interrupt callback function type for ABDAC.

The interrupt handler can be configured to do a function callback, the callback function must match the abdac_callback_t type.

typedef enum abdac_interrupt_source abdac_interrupt_source_t

Interrupt sources.

enum abdac_data_format

Data format of the SDR register value.

Enumerator
ABDAC_DATE_32BIT
ABDAC_DATE_20BIT
ABDAC_DATE_18BIT
ABDAC_DATE_16BIT
ABDAC_DATE_16BIT_COMPACT
ABDAC_DATE_8BIT
ABDAC_DATE_8BIT_COMPACT

enum abdac_interrupt_source

Interrupt sources.

Enumerator
ABDAC_INTERRUPT_TXRDY
ABDAC_INTERRUPT_TXUR

enum abdac_sample_rate

Supported sample rate.

Enumerator
ABDAC_SAMPLE_RATE_8000
ABDAC_SAMPLE_RATE_11025
ABDAC_SAMPLE_RATE_12000
ABDAC_SAMPLE_RATE_16000
ABDAC_SAMPLE_RATE_22050
ABDAC_SAMPLE_RATE_24000
ABDAC_SAMPLE_RATE_32000
ABDAC_SAMPLE_RATE_44100
ABDAC_SAMPLE_RATE_48000

void abdac_clear_interrupt_flag	(	struct abdac_dev_inst *const	dev_inst,
		abdac_interrupt_source_t	source
	)

Clear the interrupt status.

Parameters

dev_inst	Device structure pointer..
source	Interrupt status to be cleared

References ABDAC_INTERRUPT_TXRDY, ABDAC_INTERRUPT_TXUR, and abdac_dev_inst::hw_dev.

Referenced by main().

status_code_t abdac_disable ( struct abdac_dev_inst *const dev_inst )

Disable the ABDAC module.

Parameters

dev_inst Device structure pointer..

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, SLEEPMGR_ACTIVE, sleepmgr_unlock_mode(), STATUS_OK, and sysclk_enable_peripheral_clock().

void abdac_disable_interrupt	(	struct abdac_dev_inst *const	dev_inst,
		abdac_interrupt_source_t	source
	)

Disable the interrupt.

Parameters

dev_inst	Device structure pointer..
source	Interrupt to be disabled

References ABDAC_INTERRUPT_TXRDY, ABDAC_INTERRUPT_TXUR, and abdac_dev_inst::hw_dev.

status_code_t abdac_enable ( struct abdac_dev_inst *const dev_inst )

Enable the ABDAC module.

Parameters

dev_inst Device structure pointer..

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, SLEEPMGR_ACTIVE, sleepmgr_lock_mode(), STATUS_OK, and sysclk_enable_peripheral_clock().

Referenced by main().

void abdac_enable_interrupt	(	struct abdac_dev_inst *const	dev_inst,
		abdac_interrupt_source_t	source
	)

Enable the interrupt.

Parameters

dev_inst	Device structure pointer..
source	Interrupt to be enabled

References ABDAC_INTERRUPT_TXRDY, ABDAC_INTERRUPT_TXUR, and abdac_dev_inst::hw_dev.

Referenced by abdac_set_callback().

void abdac_get_config_defaults ( struct abdac_config *const cfg )

Initialize a ABDAC configuration structure to defaults.

Initialize a given ABDAC configuration structure to a set of known default values. This function should be called on all new instances of these configuration structures before being modified by the user application.

The default configuration is as follows:

sample rate with 8000hz.
16 bit data format.
stereo mode.
Common mode adjustment is disabled.

Parameters

cfg	Configuration structure to initialize to default values.

References ABDAC_DATE_16BIT, ABDAC_SAMPLE_RATE_8000, Assert, abdac_config::cmoc, abdac_config::data_word_format, abdac_config::mono, and abdac_config::sample_rate_hz.

Referenced by main().

status_code_t abdac_init	(	struct abdac_dev_inst *const	dev_inst,
		Abdacb *const	abdac,
		struct abdac_config *const	cfg
	)

Initialize the ABDAC module.

Parameters

dev_inst	Device structure pointer.
abdac	Base address of the ABDAC instance.
cfg	Pointer to ABDAC configuration.

Returns: Status code.

References abdac_set_config(), Assert, abdac_dev_inst::cfg, abdac_dev_inst::hw_dev, sysclk_disable_peripheral_clock(), and sysclk_enable_peripheral_clock().

Referenced by main().

static bool abdac_is_busy ( struct abdac_dev_inst *const dev_inst )

inlinestatic

Check the busy status of ABDAC.

Parameters

dev_inst Device structure pointer..

Returns: true if ABDAC is busy, else it will return false.

References abdac_dev_inst::hw_dev.

Referenced by abdac_disable(), abdac_enable(), abdac_set_config(), abdac_sw_reset(), abdac_swap_channels(), abdac_write_data0(), and abdac_write_data1().

static bool abdac_is_tx_ready ( struct abdac_dev_inst *const dev_inst )

inlinestatic

Check the transmit ready status of ABDAC.

Parameters

dev_inst Device structure pointer..

Returns: true if ABDAC is ready to receive a new data in SDR, else it will return false.

References abdac_dev_inst::hw_dev.

Referenced by abdac_write_data0(), and abdac_write_data1().

static bool abdac_is_tx_underrun ( struct abdac_dev_inst *const dev_inst )

inlinestatic

Check the transmit underrun status of ABDAC.

Parameters

dev_inst Device structure pointer..

Returns: true if at least one underrun has occurred since the last time this bit was cleared, else it will return false.

References abdac_dev_inst::hw_dev.

static uint32_t abdac_read_interrupt_mask ( struct abdac_dev_inst *const dev_inst )

inlinestatic

Return the ABDAC interrupts mask value.

Parameters

dev_inst Device structure pointer..

Returns: Interrupt mask value

References abdac_dev_inst::hw_dev.

void abdac_set_callback	(	struct abdac_dev_inst *const	dev_inst,
		abdac_interrupt_source_t	source,
		abdac_callback_t	callback,
		uint8_t	irq_level
	)

Set callback for ABDAC.

Parameters

dev_inst	Device structure pointer.
source	Interrupt source.
callback	callback function pointer.
irq_level	interrupt level.

References abdac_callback_pointer, abdac_enable_interrupt(), and irq_register_handler.

status_code_t abdac_set_config ( struct abdac_dev_inst *const dev_inst )

Configure the ABDAC module.

Parameters

dev_inst Device structure pointer..

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), ABDAC_SAMPLE_RATE_11025, ABDAC_SAMPLE_RATE_12000, ABDAC_SAMPLE_RATE_16000, ABDAC_SAMPLE_RATE_22050, ABDAC_SAMPLE_RATE_24000, ABDAC_SAMPLE_RATE_32000, ABDAC_SAMPLE_RATE_44100, ABDAC_SAMPLE_RATE_48000, ABDAC_SAMPLE_RATE_8000, BOARD_OSC0_HZ, abdac_dev_inst::cfg, abdac_config::cmoc, abdac_config::data_word_format, ERR_TIMEOUT, genclk_config_defaults(), genclk_config_set_divider(), genclk_config_set_source(), genclk_enable(), genclk_enable_source(), GENCLK_SRC_PLL0, abdac_dev_inst::hw_dev, abdac_config::mono, pll_config_init(), pll_enable(), PLL_SRC_OSC0, pll_wait_for_lock(), abdac_config::sample_rate_hz, and STATUS_OK.

Referenced by abdac_init().

void abdac_set_volume0	(	struct abdac_dev_inst *const	dev_inst,
		bool	mute,
		uint32_t	volume
	)

Set the volume of channel 0.

Parameters

dev_inst	Device structure pointer..
mute	Flag if set the channel mute
volume	Value of volume

Returns: Status code.

References abdac_dev_inst::hw_dev.

Referenced by main().

void abdac_set_volume1	(	struct abdac_dev_inst *const	dev_inst,
		bool	mute,
		uint32_t	volume
	)

Set the volume of channel 1.

Parameters

dev_inst	Device structure pointer..
mute	Flag if set the channel mute
volume	Value of volume

Returns: Status code.

References abdac_dev_inst::hw_dev.

Referenced by main().

status_code_t abdac_sw_reset ( struct abdac_dev_inst *const dev_inst )

Software reset the ABDAC module.

Parameters

dev_inst Device structure pointer..

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, and STATUS_OK.

status_code_t abdac_swap_channels ( struct abdac_dev_inst *const dev_inst )

Swap the ABDAC channel output.

Parameters

dev_inst Device structure pointer..

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, and STATUS_OK.

status_code_t abdac_write_data0	(	struct abdac_dev_inst *const	dev_inst,
		uint32_t	data
	)

Writes the data to SDR0.

Parameters

dev_inst	Device structure pointer..
data	Data value to write to SDR0.

Returns: Status code.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), abdac_is_tx_ready(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, and STATUS_OK.

status_code_t abdac_write_data1	(	struct abdac_dev_inst *const	dev_inst,
		uint32_t	data
	)

Writes the data to SDR1.

Parameters

dev_inst	Device structure pointer..
data	Data value to write to SDR1.

References ABDAC_BUSY_TIMEOUT, abdac_is_busy(), abdac_is_tx_ready(), ERR_TIMEOUT, abdac_dev_inst::hw_dev, and STATUS_OK.

Microchip® Advanced Software Framework

Data Structures

Macros

Typedefs

Enumerations

Functions