Purpose

Driver for the Digital-to-Analog Converter Controller. It provides access to the main features of the DAC controller.

Usage

DACC clock should be enabled before using it.
- sysclk_enable_peripheral_clock() can be used to enable the clock.
Reset DACC with dacc_reset().
If DACC can be enabled/disabled, uses dacc_enable() and dacc_disable().
Initialize DACC timing with dacc_set_timing() (different DAC peripheral may require different parameters).
Write conversion data with dacc_write_conversion_data().
Configure trigger with dacc_set_trigger() and dacc_disable_trigger().
Configure FIFO transfer mode with dacc_set_transfer_mode().
Control interrupts with dacc_enable_interrupt(), dacc_disable_interrupt(), dacc_get_interrupt_mask() and dacc_get_interrupt_status().
DACC registers support write protect with dacc_set_writeprotect() and dacc_get_writeprotect_status().
If the DACC can work with PDC, use dacc_get_pdc_base() to get PDC register base for the DAC controller.
If the DACC has several channels to process, the following functions can be used:
- Enable/Disable TAG and select output channel selection by dacc_set_channel_selection(), dacc_enable_flexible_channel_selection().
- Enable/disable channel by dacc_enable_channel() / dacc_disable_channel(), get channel status by dacc_get_channel_status().

Dependencies

This driver does not depend on other modules.

Macros
#define	DACC_WP_KEY (0x444143)
	DACC Write Protect Key "DAC" in ASCII. More...

#define	DACC_WPMR_WPKEY_PASSWD DACC_WPMR_WPKEY(DACC_WP_KEY)

#define	MAX_CH_NB 0
	Max channel number. More...

Functions
void	dacc_disable (Dacc *p_dacc)
	Disable DACC. More...

uint32_t	dacc_disable_channel (Dacc *p_dacc, uint32_t ul_channel)
	Disable DACC channel. More...

void	dacc_disable_interrupt (Dacc *p_dacc, uint32_t ul_interrupt_mask)
	Disable DACC interrupts. More...

void	dacc_disable_trigger (Dacc *p_dacc, uint32_t channel)
	Disable trigger (free run mode). More...

void	dacc_enable (Dacc *p_dacc)
	Enable DACC. More...

uint32_t	dacc_enable_channel (Dacc *p_dacc, uint32_t ul_channel)
	Enable DACC channel. More...

void	dacc_enable_flexible_selection (Dacc *p_dacc)
	Enable the flexible channel selection mode (TAG). More...

void	dacc_enable_interrupt (Dacc *p_dacc, uint32_t ul_interrupt_mask)
	Enable DACC interrupts. More...

uint32_t	dacc_get_analog_control (Dacc *p_dacc)
	Get the analog control value. More...

uint32_t	dacc_get_channel_status (Dacc *p_dacc)
	Get the channel status. More...

uint32_t	dacc_get_interrupt_mask (Dacc *p_dacc)
	Get the interrupt mask. More...

uint32_t	dacc_get_interrupt_status (Dacc *p_dacc)
	Get the interrupt status. More...

Pdc *	dacc_get_pdc_base (Dacc *p_dacc)
	Get PDC registers base address. More...

uint32_t	dacc_get_writeprotect_status (Dacc *p_dacc)
	Get the write protect status. More...

void	dacc_reset (Dacc *p_dacc)
	Reset DACC. More...

uint32_t	dacc_set_analog_control (Dacc *p_dacc, uint32_t ul_analog_control)
	Set the analog control value. More...

uint32_t	dacc_set_channel_selection (Dacc *p_dacc, uint32_t ul_channel)
	Disable flexible (TAG) mode and select a channel for DAC outputs. More...

uint32_t	dacc_set_osr (Dacc *p_dacc, uint32_t channel, uint32_t ul_osr)
	Set DACC osr. More...

uint32_t	dacc_set_power_save (Dacc *p_dacc, uint32_t ul_sleep_mode, uint32_t ul_fast_wakeup_mode)
	Set the power save mode. More...

uint32_t	dacc_set_prescaler (Dacc *p_dacc, uint32_t ul_prescaler)
	Set DACC prescaler. More...

uint32_t	dacc_set_timing (Dacc *p_dacc, uint32_t ul_startup, uint32_t ul_clock_divider)
	Set the DACC timing. More...

uint32_t	dacc_set_timing (Dacc *p_dacc, uint32_t ul_refresh, uint32_t ul_maxs, uint32_t ul_startup)
	Set DACC timings. More...

uint32_t	dacc_set_transfer_mode (Dacc *p_dacc, uint32_t ul_mode)
	Set the transfer mode. More...

uint32_t	dacc_set_trigger (Dacc *p_dacc, uint32_t ul_trigger, uint32_t channel)
	Enable trigger and set the trigger source. More...

void	dacc_set_writeprotect (Dacc *p_dacc, uint32_t ul_enable)
	Enable or disable write protect of DACC registers. More...

void	dacc_write_conversion_data (Dacc *p_dacc, uint32_t ul_data, uint32_t channel)
	Write data to conversion register. More...

#define DACC_WP_KEY (0x444143)

DACC Write Protect Key "DAC" in ASCII.

#define DACC_WPMR_WPKEY_PASSWD DACC_WPMR_WPKEY(DACC_WP_KEY)

Referenced by dacc_set_writeprotect().

#define MAX_CH_NB 0

Max channel number.

Referenced by dacc_disable_channel(), dacc_enable_channel(), and dacc_set_channel_selection().

void dacc_disable ( Dacc * p_dacc )

Disable DACC.

Parameters

p_dacc Pointer to a DACC instance.

Returns: DACC_RC_OK for OK.

uint32_t dacc_disable_channel	(	Dacc *	p_dacc,
		uint32_t	ul_channel
	)

Disable DACC channel.

Parameters

p_dacc	Pointer to a DACC instance.
ul_channel	The output channel to disable.

Returns: DACC_RC_OK for OK.

References DACC_RC_INVALID_PARAM, DACC_RC_OK, and MAX_CH_NB.

void dacc_disable_interrupt	(	Dacc *	p_dacc,
		uint32_t	ul_interrupt_mask
	)

Disable DACC interrupts.

Parameters

p_dacc	Pointer to a DACC instance.
ul_interrupt_mask	The interrupt mask.

void dacc_disable_trigger	(	Dacc *	p_dacc,
		uint32_t	channel
	)

Disable trigger (free run mode).

Parameters

p_dacc	Pointer to a DACC instance.
channel	Channel to be disabled

void dacc_enable ( Dacc * p_dacc )

Enable DACC.

Parameters

p_dacc Pointer to a DACC instance.

Referenced by start_dac().

uint32_t dacc_enable_channel	(	Dacc *	p_dacc,
		uint32_t	ul_channel
	)

Enable DACC channel.

Parameters

p_dacc	Pointer to a DACC instance.
ul_channel	The output channel to enable.

Returns: DACC_RC_OK for OK.

References DACC_RC_INVALID_PARAM, DACC_RC_OK, and MAX_CH_NB.

void dacc_enable_flexible_selection ( Dacc * p_dacc )

Enable the flexible channel selection mode (TAG).

In this mode the 2 bits, DACC_CDR[13:12] which are otherwise unused, are employed to select the channel in the same way as with the USER_SEL field. Finally, if the WORD field is set, the 2 bits, DACC_CDR[13:12] are used for channel selection of the first data and the 2 bits, DACC_CDR[29:28] for channel selection of the second data.

Parameters

p_dacc Pointer to a DACC instance.

void dacc_enable_interrupt	(	Dacc *	p_dacc,
		uint32_t	ul_interrupt_mask
	)

Enable DACC interrupts.

Parameters

p_dacc	Pointer to a DACC instance.
ul_interrupt_mask	The interrupt mask.

uint32_t dacc_get_analog_control ( Dacc * p_dacc )

Get the analog control value.

Parameters

p_dacc Pointer to a DACC instance.

Returns: Current setting of analog control.

uint32_t dacc_get_channel_status ( Dacc * p_dacc )

Get the channel status.

Parameters

p_dacc Pointer to a DACC instance.

Returns: DACC channel status.

uint32_t dacc_get_interrupt_mask ( Dacc * p_dacc )

Get the interrupt mask.

Parameters

p_dacc Pointer to a DACC instance.

Returns: The interrupt mask.

uint32_t dacc_get_interrupt_status ( Dacc * p_dacc )

Get the interrupt status.

Parameters

p_dacc Pointer to a DACC instance.

Returns: The interrupt status.

Pdc* dacc_get_pdc_base ( Dacc * p_dacc )

Get PDC registers base address.

Parameters

p_dacc Pointer to a DACC instance.

Returns: DACC PDC register base address.

References UNUSED.

uint32_t dacc_get_writeprotect_status ( Dacc * p_dacc )

Get the write protect status.

Parameters

p_dacc Pointer to a DACC instance.

Returns: Write protect status.

void dacc_reset ( Dacc * p_dacc )

Reset DACC.

Parameters

p_dacc Pointer to a DACC instance.

Referenced by start_dac().

uint32_t dacc_set_analog_control	(	Dacc *	p_dacc,
		uint32_t	ul_analog_control
	)

Set the analog control value.

Parameters

p_dacc	Pointer to a DACC instance.
ul_analog_control	Analog control configuration.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

uint32_t dacc_set_channel_selection	(	Dacc *	p_dacc,
		uint32_t	ul_channel
	)

Disable flexible (TAG) mode and select a channel for DAC outputs.

Parameters

p_dacc	Pointer to a DACC instance.
ul_channel	Channel to select.

Returns: DACC_RC_OK if successful.

References DACC_RC_INVALID_PARAM, DACC_RC_OK, and MAX_CH_NB.

uint32_t dacc_set_osr	(	Dacc *	p_dacc,
		uint32_t	channel,
		uint32_t	ul_osr
	)

Set DACC osr.

Parameters

p_dacc	Pointer to a DACC instance.
channel	DACC osr channel to be set.
ul_prescaler	Osr value.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

uint32_t dacc_set_power_save	(	Dacc *	p_dacc,
		uint32_t	ul_sleep_mode,
		uint32_t	ul_fast_wakeup_mode
	)

Set the power save mode.

Parameters

p_dacc	Pointer to a DACC instance.
ul_sleep_mode	Sleep mode configuration.
ul_fast_wakeup_mode	Fast wakeup mode configuration.

Returns: DACC_RC_OK if successful.

References DACC_RC_OK.

uint32_t dacc_set_prescaler	(	Dacc *	p_dacc,
		uint32_t	ul_prescaler
	)

Set DACC prescaler.

Parameters

p_dacc	Pointer to a DACC instance.
ul_prescaler	Prescaler value.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

uint32_t dacc_set_timing	(	Dacc *	p_dacc,
		uint32_t	ul_startup,
		uint32_t	ul_clock_divider
	)

Set the DACC timing.

Set DACC timings.

Parameters

p_dacc	Pointer to a DACC instance.
ul_startup	Startup time selection.
ul_clock_divider	Clock divider for internal trigger.

Returns: DACC_RC_OK for OK.

Parameters

p_dacc	Pointer to a DACC instance.
ul_maxs	Max speed mode configuration.
ul_startup	Startup time selection.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

Referenced by start_dac().

uint32_t dacc_set_timing	(	Dacc *	p_dacc,
		uint32_t	ul_refresh,
		uint32_t	ul_maxs,
		uint32_t	ul_startup
	)

Set DACC timings.

Parameters

p_dacc	Pointer to a DACC instance.
ul_refresh	Refresh period setting value.
ul_maxs	Max speed mode configuration.
ul_startup	Startup time selection.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

uint32_t dacc_set_transfer_mode	(	Dacc *	p_dacc,
		uint32_t	ul_mode
	)

Set the transfer mode.

Parameters

p_dacc	Pointer to a DACC instance.
ul_mode	Transfer mode configuration.

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

Referenced by start_dac().

uint32_t dacc_set_trigger	(	Dacc *	p_dacc,
		uint32_t	ul_trigger,
		uint32_t	channel
	)

Enable trigger and set the trigger source.

Parameters

p_dacc	Pointer to a DACC instance.
ul_trigger	Trigger source number.
channel	Channel to be set

Returns: DACC_RC_OK for OK.

References DACC_RC_OK.

void dacc_set_writeprotect	(	Dacc *	p_dacc,
		uint32_t	ul_enable
	)

Enable or disable write protect of DACC registers.

Parameters

p_dacc	Pointer to a DACC instance.
ul_enable	1 to enable, 0 to disable.

References DACC_WPMR_WPKEY_PASSWD.

void dacc_write_conversion_data	(	Dacc *	p_dacc,
		uint32_t	ul_data,
		uint32_t	channel
	)

Write data to conversion register.

Note: The ul_data could be output data or data with channel TAG when flexible mode is used.

In flexible mode the 2 bits, DACC_CDR[13:12] which are otherwise unused, are employed to select the channel in the same way as with the USER_SEL field. Finally, if the WORD field is set, the 2 bits, DACC_CDR[13:12] are used for channel selection of the first data and the 2 bits, DACC_CDR[29:28] for channel selection of the second data.

See Also: dacc_enable_flexible_selection()

Parameters

p_dacc	Pointer to a DACC instance.
ul_data	The data to be transferred to analog value.
channel	The channel to convert the data ul_data

Referenced by main(), and start_dac().

Microchip® Advanced Software Framework

Dependencies

Macros

Functions