Dac12

Files
file	fsl_dac12.h

Data Structures
struct	_dac12_hardware_info
	DAC12 hardware information. More...
struct	dac12_config_t
	DAC12 module configuration. More...

Variables
dac12_fifo_size_info_t	_dac12_hardware_info::fifoSizeInfo
uint32_t	dac12_config_t::fifoWatermarkLevel
dac12_fifo_work_mode_t	dac12_config_t::fifoWorkMode
dac12_reference_voltage_source_t	dac12_config_t::referenceVoltageSource
dac12_fifo_trigger_mode_t	dac12_config_t::fifoTriggerMode
dac12_reference_current_source_t	dac12_config_t::referenceCurrentSource
dac12_speed_mode_t	dac12_config_t::speedMode
bool	dac12_config_t::enableAnalogBuffer
uint32_t	dac12_config_t::currentReferenceInternalTrimValue

Driver version
enum	_dac12_status_flags {   kDAC12_OverflowFlag = DAC_CR_OVFF_MASK , kDAC12_UnderflowFlag = DAC_CR_UDFF_MASK , kDAC12_WatermarkFlag = DAC_CR_WMF_MASK , kDAC12_NearlyEmptyFlag = DAC_CR_NEMPTF_MASK ,   kDAC12_FullFlag = DAC_CR_FULLF_MASK }
	DAC12 flags. More...
enum	_dac12_interrupt_enable { kDAC12_UnderOrOverflowInterruptEnable = DAC_CR_UVIE_MASK , kDAC12_WatermarkInterruptEnable = DAC_CR_WTMIE_MASK , kDAC12_NearlyEmptyInterruptEnable = DAC_CR_EMPTIE_MASK , kDAC12_FullInterruptEnable = DAC_CR_FULLIE_MASK }
	DAC12 interrupts. More...
enum	_dac12_fifo_size_info {   kDAC12_FIFOSize2 = 0U , kDAC12_FIFOSize4 = 1U , kDAC12_FIFOSize8 = 2U , kDAC12_FIFOSize16 = 3U ,   kDAC12_FIFOSize32 = 4U , kDAC12_FIFOSize64 = 5U , kDAC12_FIFOSize128 = 6U , kDAC12_FIFOSize256 = 7U }
	DAC12 FIFO size information provided by hardware. More...
enum	_dac12_fifo_work_mode { kDAC12_FIFODisabled = 0U , kDAC12_FIFOWorkAsNormalMode = 1U , kDAC12_FIFOWorkAsSwingMode = 2U }
	DAC12 FIFO work mode. More...
enum	_dac12_reference_voltage_source { kDAC12_ReferenceVoltageSourceAlt1 = 0U , kDAC12_ReferenceVoltageSourceAlt2 = 1U }
	DAC12 reference voltage source. More...
enum	_dac12_fifo_trigger_mode { kDAC12_FIFOTriggerByHardwareMode = 0U , kDAC12_FIFOTriggerBySoftwareMode = 1U }
	DAC12 FIFO trigger mode. More...
enum	_dac12_reference_current_source { kDAC12_ReferenceCurrentSourceDisabled = 0U , kDAC12_ReferenceCurrentSourceAlt0 = 1U , kDAC12_ReferenceCurrentSourceAlt1 = 2U , kDAC12_ReferenceCurrentSourceAlt2 = 3U }
	DAC internal reference current source. More...
enum	_dac12_speed_mode { kDAC12_SpeedLowMode = 0U , kDAC12_SpeedMiddleMode = 1U , kDAC12_SpeedHighMode = 2U }
	DAC analog buffer speed mode for conversion. More...
typedef enum _dac12_fifo_size_info	dac12_fifo_size_info_t
	DAC12 FIFO size information provided by hardware.
typedef enum _dac12_fifo_work_mode	dac12_fifo_work_mode_t
	DAC12 FIFO work mode.
typedef enum _dac12_reference_voltage_source	dac12_reference_voltage_source_t
	DAC12 reference voltage source.
typedef enum _dac12_fifo_trigger_mode	dac12_fifo_trigger_mode_t
	DAC12 FIFO trigger mode.
typedef enum _dac12_reference_current_source	dac12_reference_current_source_t
	DAC internal reference current source.
typedef enum _dac12_speed_mode	dac12_speed_mode_t
	DAC analog buffer speed mode for conversion.
typedef struct _dac12_hardware_info	dac12_hardware_info_t
	DAC12 hardware information.
#define	FSL_DAC12_DRIVER_VERSION   (MAKE_VERSION(2, 1, 0))
	DAC12 driver version 2.1.0.
#define	DAC12_CR_W1C_FLAGS_MASK   (DAC_CR_OVFF_MASK | DAC_CR_UDFF_MASK)
	Define "write 1 to clear" flags.
#define	DAC12_CR_ALL_FLAGS_MASK   (DAC12_CR_W1C_FLAGS_MASK | DAC_CR_WMF_MASK | DAC_CR_NEMPTF_MASK | DAC_CR_FULLF_MASK)
	Define all the flag bits in DACx_CR register.

Initialization and de-initialization
void	DAC12_GetHardwareInfo (DAC_Type *base, dac12_hardware_info_t *info)
	Get hardware information about this module.
void	DAC12_Init (DAC_Type *base, const dac12_config_t *config)
	Initialize the DAC12 module.
void	DAC12_GetDefaultConfig (dac12_config_t *config)
	Initializes the DAC12 user configuration structure.
void	DAC12_Deinit (DAC_Type *base)
	De-initialize the DAC12 module.

Detailed Description

Typedef Documentation

dac12_reference_current_source_t

typedef enum _dac12_reference_current_source dac12_reference_current_source_t

DAC internal reference current source.

Analog module needs reference current to keep working . Such reference current can generated by IP itself, or by on-chip PMC's "reference part". If no current reference be selected, analog module can’t working normally ,even when other register can still be assigned, DAC would waste current but no function. To make the DAC work, either kDAC12_ReferenceCurrentSourceAltx should be selected.

Enumeration Type Documentation

_dac12_fifo_size_info

enum _dac12_fifo_size_info

DAC12 FIFO size information provided by hardware.

Enumerator
kDAC12_FIFOSize2	FIFO depth is 2.
kDAC12_FIFOSize4	FIFO depth is 4.
kDAC12_FIFOSize8	FIFO depth is 8.
kDAC12_FIFOSize16	FIFO depth is 16.
kDAC12_FIFOSize32	FIFO depth is 32.
kDAC12_FIFOSize64	FIFO depth is 64.
kDAC12_FIFOSize128	FIFO depth is 128.
kDAC12_FIFOSize256	FIFO depth is 256.

_dac12_fifo_trigger_mode

enum _dac12_fifo_trigger_mode

DAC12 FIFO trigger mode.

Enumerator
kDAC12_FIFOTriggerByHardwareMode	Buffer would be triggered by hardware.
kDAC12_FIFOTriggerBySoftwareMode	Buffer would be triggered by software.

_dac12_fifo_work_mode

enum _dac12_fifo_work_mode

DAC12 FIFO work mode.

Enumerator
kDAC12_FIFODisabled	FIFO disabled and only one level buffer is enabled. Any data written from this buffer goes to conversion.
kDAC12_FIFOWorkAsNormalMode	Data will first read from FIFO to buffer then go to conversion.
kDAC12_FIFOWorkAsSwingMode	In Swing mode, the FIFO must be set up to be full. In Swing back mode, a trigger changes the read pointer to make it swing between the FIFO Full and Nearly Empty state. That is, the trigger increases the read pointer till FIFO is nearly empty and decreases the read pointer till the FIFO is full.

_dac12_interrupt_enable

enum _dac12_interrupt_enable

DAC12 interrupts.

Enumerator
kDAC12_UnderOrOverflowInterruptEnable	Underflow and overflow interrupt enable.
kDAC12_WatermarkInterruptEnable	Watermark interrupt enable.
kDAC12_NearlyEmptyInterruptEnable	Nearly empty interrupt enable.
kDAC12_FullInterruptEnable	Full interrupt enable.

_dac12_reference_current_source

enum _dac12_reference_current_source

DAC internal reference current source.

Analog module needs reference current to keep working . Such reference current can generated by IP itself, or by on-chip PMC's "reference part". If no current reference be selected, analog module can’t working normally ,even when other register can still be assigned, DAC would waste current but no function. To make the DAC work, either kDAC12_ReferenceCurrentSourceAltx should be selected.

Enumerator
kDAC12_ReferenceCurrentSourceDisabled	None of reference current source is enabled.
kDAC12_ReferenceCurrentSourceAlt0	Use the internal reference current generated by the module itself.
kDAC12_ReferenceCurrentSourceAlt1	Use the ZTC(Zero Temperature Coefficient) reference current generated by on-chip power management module.
kDAC12_ReferenceCurrentSourceAlt2	Use the PTAT(Proportional To Absolution Temperature) reference current generated by power management module.

_dac12_reference_voltage_source

enum _dac12_reference_voltage_source

DAC12 reference voltage source.

Enumerator
kDAC12_ReferenceVoltageSourceAlt1	The DAC selects DACREF_1 as the reference voltage.
kDAC12_ReferenceVoltageSourceAlt2	The DAC selects DACREF_2 as the reference voltage.

_dac12_speed_mode

enum _dac12_speed_mode

DAC analog buffer speed mode for conversion.

Enumerator
kDAC12_SpeedLowMode	Low speed mode.
kDAC12_SpeedMiddleMode	Middle speed mode.
kDAC12_SpeedHighMode	High speed mode.

_dac12_status_flags

enum _dac12_status_flags

DAC12 flags.

Enumerator
kDAC12_OverflowFlag	FIFO overflow status flag, which indicates that more data has been written into FIFO than it can hold.
kDAC12_UnderflowFlag	FIFO underflow status flag, which means that there is a new trigger after the FIFO is nearly empty.
kDAC12_WatermarkFlag	FIFO wartermark status flag, which indicates the remaining FIFO data is less than the watermark setting.
kDAC12_NearlyEmptyFlag	FIFO nearly empty flag, which means there is only one data remaining in FIFO.
kDAC12_FullFlag	FIFO full status flag, which means that the FIFO read pointer equals the write pointer, as the write pointer increase.

Function Documentation

DAC12_Deinit()

void DAC12_Deinit

(

DAC_Type *

base

)

De-initialize the DAC12 module.

Parameters

base	DAC12 peripheral base address.

brief De-initialize the DAC12 module.

param base DAC12 peripheral base address.

DAC12_GetDefaultConfig()

void DAC12_GetDefaultConfig

(

dac12_config_t *

config

)

Initializes the DAC12 user configuration structure.

This function initializes the user configuration structure to a default value. The default values are:

config->fifoWatermarkLevel = 0U;
config->fifoWorkMode = kDAC12_FIFODisabled;
config->referenceVoltageSource = kDAC12_ReferenceVoltageSourceAlt1;
config->fifoTriggerMode = kDAC12_FIFOTriggerByHardwareMode;
config->referenceCurrentSource = kDAC12_ReferenceCurrentSourceAlt0;
config->speedMode = kDAC12_SpeedLowMode;
config->speedMode = false;
config->currentReferenceInternalTrimValue = 0x4;

Parameters

config

Pointer to the configuration structure. See "dac12_config_t".

brief Initializes the DAC12 user configuration structure.

This function initializes the user configuration structure to a default value. The default values are: code config->fifoWatermarkLevel = 0U; config->fifoWorkMode = kDAC12_FIFODisabled; config->referenceVoltageSource = kDAC12_ReferenceVoltageSourceAlt1; config->fifoTriggerMode = kDAC12_FIFOTriggerByHardwareMode; config->referenceCurrentSource = kDAC12_ReferenceCurrentSourceAlt0; config->speedMode = kDAC12_SpeedLowMode; config->speedMode = false; config->currentReferenceInternalTrimValue = 0x4; endcode param config Pointer to the configuration structure. See "dac12_config_t".

DAC12_GetHardwareInfo()

void DAC12_GetHardwareInfo	(	DAC_Type *	base,
		dac12_hardware_info_t *	info
	)

Get hardware information about this module.

Parameters

base	DAC12 peripheral base address.
info	Pointer to info structure, see to dac12_hardware_info_t.

brief Get hardware information about this module.

param base DAC12 peripheral base address. param info Pointer to info structure, see to dac12_hardware_info_t.

DAC12_Init()

void DAC12_Init	(	DAC_Type *	base,
		const dac12_config_t *	config
	)

Initialize the DAC12 module.

Parameters

base	DAC12 peripheral base address.
config	Pointer to configuration structure, see to dac12_config_t.

brief Initialize the DAC12 module.

param base DAC12 peripheral base address. param config Pointer to configuration structure, see to dac12_config_t.

Variable Documentation

currentReferenceInternalTrimValue

uint32_t dac12_config_t::currentReferenceInternalTrimValue

Internal reference current trim value. 3-bit value is available.

enableAnalogBuffer

bool dac12_config_t::enableAnalogBuffer

Enable analog buffer for high drive.

fifoSizeInfo

dac12_fifo_size_info_t _dac12_hardware_info::fifoSizeInfo

The number of words in this device's DAC buffer.

fifoWatermarkLevel

uint32_t dac12_config_t::fifoWatermarkLevel

FIFO's watermark, the max value can be the hardware FIFO size.

fifoWorkMode

dac12_fifo_work_mode_t dac12_config_t::fifoWorkMode

FIFI's work mode about pointers.

referenceCurrentSource

dac12_reference_current_source_t dac12_config_t::referenceCurrentSource

Select the trigger mode for FIFO. Select the reference current source.

referenceVoltageSource

dac12_reference_voltage_source_t dac12_config_t::referenceVoltageSource

Select the reference voltage source.

speedMode

dac12_speed_mode_t dac12_config_t::speedMode

Select the speed mode for conversion.