twr_dac

Driver for DAC. More...

Data Structures
struct	twr_dac_config_t
	DAC channel event. More...

Enumerations
enum	twr_dac_channel_t {   TWR_DAC_DAC0 = 0 ,   TWR_DAC_DAC1 = 1 }
	DAC channel. More...
enum	twr_dac_format_t {   TWR_DAC_FORMAT_8_BIT = 0 ,   TWR_DAC_FORMAT_16_BIT = 1 ,   TWR_DAC_FORMAT_VOLTAGE = 2 }
	Raw value format. More...
enum	twr_dac_sample_rate_t {   TWR_DAC_SAMPLE_RATE_8K = 0 ,   TWR_DAC_SAMPLE_RATE_16K = 1 }
	Sample rate. More...
enum	twr_dac_data_size_t {   TWR_DAC_DATA_SIZE_8 = 0 ,   TWR_DAC_DATA_SIZE_16 = 1 }
	Data size. More...
enum	twr_dac_mode_t {   TWR_DAC_MODE_SINGLE = 0 ,   TWR_DAC_MODE_CIRCULAR = 1 }
	Mode. More...
enum	twr_dac_event_t {   TWR_DAC_EVENT_HALF_DONE = 0 ,   TWR_DAC_EVENT_DONE = 1 }
	DAC channel event. More...

Functions
void	twr_dac_init (twr_dac_channel_t channel)
	Initialize DAC channel. More...
void	twr_dac_deinit (twr_dac_channel_t channel)
	Deitialize DAC channel. More...
void	twr_dac_set_output (twr_dac_channel_t channel, const void *raw, twr_dac_format_t format)
	Set DAC channel output as raw value. More...
void	twr_dac_set_event_handler (twr_dac_channel_t channel, void(*event_handler)(twr_dac_channel_t, twr_dac_event_t, void *), void *event_param)
	Set callback function. More...
bool	twr_dac_async_config (twr_dac_channel_t channel, twr_dac_config_t *config)
	Configure image of DAC DMA channel. More...
bool	twr_dac_async_run (twr_dac_channel_t channel)
	Start asynchronous DAC channel operation. More...
void	twr_dac_async_stop (twr_dac_channel_t channel)
	Stop asynchronous DAC channel operation. More...

Detailed Description

Driver for DAC.

Enumeration Type Documentation

twr_dac_channel_t

enum twr_dac_channel_t

DAC channel.

Enumerator
TWR_DAC_DAC0	DAC channel DAC0.
TWR_DAC_DAC1	DAC channel DAC1.

Definition at line 13 of file twr_dac.h.

twr_dac_data_size_t

enum twr_dac_data_size_t

Data size.

Enumerator
TWR_DAC_DATA_SIZE_8	Data size is 8b.
TWR_DAC_DATA_SIZE_16	Data size is 16b.

Definition at line 52 of file twr_dac.h.

twr_dac_event_t

enum twr_dac_event_t

DAC channel event.

Enumerator
TWR_DAC_EVENT_HALF_DONE	Event is done.
TWR_DAC_EVENT_DONE	Event is done.

Definition at line 76 of file twr_dac.h.

twr_dac_format_t

enum twr_dac_format_t

Raw value format.

Enumerator
TWR_DAC_FORMAT_8_BIT	Raw value format is 8-bit.
TWR_DAC_FORMAT_16_BIT	Raw value format is 16-bit.
TWR_DAC_FORMAT_VOLTAGE	Raw value format is float.

Definition at line 25 of file twr_dac.h.

twr_dac_mode_t

enum twr_dac_mode_t

Mode.

Enumerator
TWR_DAC_MODE_SINGLE	Mode single.
TWR_DAC_MODE_CIRCULAR	Mode circular (repeate playing buffer)

Definition at line 64 of file twr_dac.h.

twr_dac_sample_rate_t

enum twr_dac_sample_rate_t

Sample rate.

Enumerator
TWR_DAC_SAMPLE_RATE_8K	Data sample-rate is 8kHz.
TWR_DAC_SAMPLE_RATE_16K	Data sample-rate is 16kHz.

Definition at line 40 of file twr_dac.h.

Function Documentation

twr_dac_async_config()

bool twr_dac_async_config	(	twr_dac_channel_t	channel,
		twr_dac_config_t *	config
	)

Configure image of DAC DMA channel.

Parameters

[in]	channel	DMA channel
[in]	buffer	Data buffer
[in]	length	Data buffer length
[in]	sample_rate	Data sample rate
[in]	mode	DAC channel DMA mode

Returns

true On success

false On failure (if DAC channel operation is in progress)

Definition at line 143 of file twr_dac.c.

twr_dac_async_run()

bool twr_dac_async_run

(

twr_dac_channel_t

channel

)

Start asynchronous DAC channel operation.

Parameters

[in]

channel

DAC channel

Returns

true On success

false On failure

Definition at line 191 of file twr_dac.c.

Here is the call graph for this function:

twr_dac_async_stop()

void twr_dac_async_stop

(

twr_dac_channel_t

channel

)

Stop asynchronous DAC channel operation.

Parameters

[in]

channel

DAC channel

Definition at line 264 of file twr_dac.c.

Referenced by twr_dac_deinit().

Here is the call graph for this function:

Here is the caller graph for this function:

twr_dac_deinit()

void twr_dac_deinit

(

twr_dac_channel_t

channel

)

Deitialize DAC channel.

Parameters

[in]

channel

DAC channel

Definition at line 73 of file twr_dac.c.

Here is the call graph for this function:

twr_dac_init()

void twr_dac_init

(

twr_dac_channel_t

channel

)

Initialize DAC channel.

Parameters

[in]

channel

DAC channel

Definition at line 43 of file twr_dac.c.

twr_dac_set_event_handler()

void twr_dac_set_event_handler	(	twr_dac_channel_t	channel,
		void(*)(twr_dac_channel_t, twr_dac_event_t, void *)	event_handler,
		void *	event_param
	)

Set callback function.

Parameters

[in]	channel	DAC channel
[in]	event_handler	Function address
[in]	event_param	Optional event parameter (can be NULL)

Definition at line 137 of file twr_dac.c.

twr_dac_set_output()

void twr_dac_set_output	(	twr_dac_channel_t	channel,
		const void *	raw,
		twr_dac_format_t	format
	)

Set DAC channel output as raw value.

Parameters

[in]	channel	DAC channel
[out]	raw	Pointer to desired raw value
[in]	format	Desired raw value format

Definition at line 104 of file twr_dac.c.