Digital-to-Analog Converter Controller (DACC)

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Purpose

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

Usage

1. DACC clock should be enabled before using it.
   • sysclk_enable_peripheral_clock() can be used to enable the clock.
2. Reset DACC with dacc_reset().
3. If DACC can be enabled/disabled, uses dacc_enable() and dacc_disable().
4. Initialize DACC timing with dacc_set_timing() (different DAC peripheral may require different parameters).
5. Write conversion data with dacc_write_conversion_data().
6. Configure trigger with dacc_set_trigger() and dacc_disable_trigger().
7. Configure FIFO transfer mode with dacc_set_transfer_mode().
8. Control interrupts with dacc_enable_interrupt(), dacc_disable_interrupt(), dacc_get_interrupt_mask() and dacc_get_interrupt_status().
9. DACC registers support write protect with dacc_set_writeprotect() and dacc_get_writeprotect_status().
10. If the DACC can work with PDC, use dacc_get_pdc_base() to get PDC register base for the DAC controller.
11. 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.

Modules
	Related Project(s)
	In this section you can find all the projects related to the Digital-to-Analog Converter Controller (DACC).
Defines
#define	DACC_WP_KEY   (0x444143)
	DACC Write Protect Key "DAC" in ASCII.
#define	MAX_CH_NB   1
	Max channel number.
Functions
void	dacc_disable_interrupt (Dacc *p_dacc, uint32_t ul_interrupt_mask)
	Disable DACC interrupts.
void	dacc_disable_trigger (Dacc *p_dacc)
	Disable trigger (free run mode).
void	dacc_enable_interrupt (Dacc *p_dacc, uint32_t ul_interrupt_mask)
	Enable DACC interrupts.
uint32_t	dacc_get_interrupt_mask (Dacc *p_dacc)
	Get the interrupt mask.
uint32_t	dacc_get_interrupt_status (Dacc *p_dacc)
	Get the interrupt status.
uint32_t	dacc_get_writeprotect_status (Dacc *p_dacc)
	Get the write protect status.
void	dacc_reset (Dacc *p_dacc)
	Reset DACC.
uint32_t	dacc_set_transfer_mode (Dacc *p_dacc, uint32_t ul_mode)
	Set the transfer mode.
uint32_t	dacc_set_trigger (Dacc *p_dacc, uint32_t ul_trigger)
	Enable trigger and set the trigger source.
void	dacc_set_writeprotect (Dacc *p_dacc, uint32_t ul_enable)
	Enable or disable write protect of DACC registers.
void	dacc_write_conversion_data (Dacc *p_dacc, uint32_t ul_data)
	Write data to conversion register.

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#define DACC_WP_KEY   (0x444143)

DACC Write Protect Key "DAC" in ASCII.

Referenced by dacc_set_writeprotect().

#define MAX_CH_NB   1

Max channel number.

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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.

References Dacc::DACC_IDR.

void dacc_disable_trigger

(

Dacc *

p_dacc

)

Disable trigger (free run mode).

Parameters:

p_dacc

Pointer to a DACC instance.

References Dacc::DACC_MR.

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.

References Dacc::DACC_IER.

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.

References Dacc::DACC_IMR.

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.

References Dacc::DACC_ISR.

Referenced by SysTick_Handler().

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.

References Dacc::DACC_WPSR.

void dacc_reset

(

Dacc *

p_dacc

)

Reset DACC.

Parameters:

p_dacc

Pointer to a DACC instance.

References Dacc::DACC_CR.

Referenced by main().

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::DACC_MR.

Referenced by main().

uint32_t dacc_set_trigger	(	Dacc *	p_dacc,
		uint32_t	ul_trigger
	)

Enable trigger and set the trigger source.

Parameters:

	p_dacc	Pointer to a DACC instance.
	ul_trigger	Trigger source number.

Returns:

DACC_RC_OK for OK.

References Dacc::DACC_MR, DACC_MR_TRGEN, DACC_MR_TRGEN_EN, DACC_MR_TRGSEL, and DACC_MR_TRGSEL_Msk.

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_WP_KEY, Dacc::DACC_WPMR, and DACC_WPMR_WPKEY.

void dacc_write_conversion_data	(	Dacc *	p_dacc,
		uint32_t	ul_data
	)

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.

References Dacc::DACC_CDR.

Referenced by SysTick_Handler().