Read Guidance

This document consists of sections titled with Driver Overview, Data Structures, Enumerations, Functions, etc., each with an overview list and detailed documentation. It is recommended to read the Driver Overview first for it includes a comprehensive description of the peripheral, driver and driver changes. Other sections give detailed information for APIs, enums, macros, etc., for your further reference.

Driver Overview
	QDC Peripheral and Driver Overview
	Content including 1) peripheral features, work logic and work method; 2) driver design logic and use method.

	The Driver Change Log
	The current QDC driver version is 2.0.0.

Data Structures
struct	qdc_config_t
	Define user configuration structure for QDC module. More...

Enumerations
enum	_qdc_status_flags { kQDC_HomeTransitionFlag = QDC_CTRL_HIRQ_MASK, kQDC_IndexPulseFlag = QDC_CTRL_XIRQ_MASK, kQDC_WatchdogTimeoutFlag = QDC_CTRL_DIRQ_MASK, kQDC_PositionCompareFlag = QDC_CTRL_CMPIRQ_MASK, kQDC_SimultPhaseChangeFlag = QDC_CTRL2_SABIRQ_MASK, kQDC_PositionRollOverFlag = QDC_CTRL2_ROIRQ_MASK, kQDC_PositionRollUnderFlag = QDC_CTRL2_RUIRQ_MASK, kQDC_PositionCompare1Flag = QDC_CTRL3_CMP1IRQ_MASK }
	QDC status flags, these flags indicate the counter's events. More...

enum	_qdc_signal_status { kQDC_SignalStatusRawHome = QDC_IMR_HOME_MASK, kQDC_SignalStatusRawIndex = QDC_IMR_INDEX_MASK, kQDC_SignalStatusRawPhaseB = QDC_IMR_PHB_MASK, kQDC_SignalStatusRawPhaseA = QDC_IMR_PHA_MASK, kQDC_SignalStatusFilteredHome = QDC_IMR_FHOM_MASK, kQDC_SignalStatusFilteredIndex = QDC_IMR_FIND_MASK, kQDC_SignalStatusFilteredPhaseB = QDC_IMR_FPHB_MASK, kQDC_SignalStatusFilteredPhaseA = QDC_IMR_FPHA_MASK }
	Signal status, these flags indicate the raw and filtered input signal status. More...

enum	_qdc_interrupt_enable { kQDC_HomeTransitionInterruptEnable = QDC_CTRL_HIE_MASK, kQDC_IndexPulseInterruptEnable = QDC_CTRL_XIE_MASK, kQDC_WatchdogTimeoutInterruptEnable = QDC_CTRL_DIE_MASK, kQDC_PositionCompareInerruptEnable = QDC_CTRL_CMPIE_MASK, kQDC_SimultPhaseChangeInterruptEnable = QDC_CTRL2_SABIE_MASK, kQDC_PositionRollOverInterruptEnable = QDC_CTRL2_ROIE_MASK, kQDC_PositionRollUnderInterruptEnable = QDC_CTRL2_RUIE_MASK, kQDC_PositionCompare1InerruptEnable = QDC_CTRL3_CMP1IE_MASK }
	Interrupt enable/disable mask. More...

enum	qdc_home_init_pos_counter_mode_t { kQDC_HomeInitPosCounterDisabled = 0U, kQDC_HomeInitPosCounterOnRisingEdge = QDC_CTRL_HIP_MASK, kQDC_HomeInitPosCounterOnFallingEdge = QDC_CTRL_HIP_MASK \| QDC_CTRL_HNE_MASK }
	Define HOME signal's trigger mode. More...

enum	qdc_index_init_pos_counter_mode_t { kQDC_IndexInitPosCounterDisabled = 0U, kQDC_IndexInitPosCounterOnRisingEdge = QDC_CTRL_XIP_MASK, kQDC_IndexInitPosCounterOnFallingEdge = QDC_CTRL_XIP_MASK \| QDC_CTRL_XNE_MASK }
	Define INDEX signal's trigger mode. More...

enum	qdc_decoder_work_mode_t { kQDC_DecoderQuadratureMode = 0U, kQDC_DecoderSignalPhaseCountMode }
	Define type for decoder work mode. More...

enum	qdc_output_pulse_mode_t { kQDC_OutputPulseOnCounterEqualCompare = 0U, kQDC_OutputPulseOnReadingPositionCounter }
	Define type for the condition of POSMATCH pulses. More...

enum	qdc_revolution_count_condition_t { kQDC_RevolutionCountOnIndexPulse = 0U, kQDC_RevolutionCountOnRollOverModulus }
	Define type for determining how the revolution counter (REV) is incremented/decremented. More...

enum	qdc_filter_sample_count_t { kQDC_Filter3Samples = 0U, kQDC_Filter4Samples = 1U, kQDC_Filter5Samples = 2U, kQDC_Filter6Samples = 3U, kQDC_Filter7Samples = 4U, kQDC_Filter8Samples = 5U, kQDC_Filter9Samples = 6U, kQDC_Filter10Samples = 7U }
	Input Filter Sample Count. More...

enum	qdc_count_direction_flag_t { kQDC_CountDirectionDown = 0U, kQDC_CountDirectionUp }
	Count direction. More...

enum	qdc_prescaler_t { kQDC_Prescaler1 = 0U, kQDC_Prescaler2 = 1U, kQDC_Prescaler4 = 2U, kQDC_Prescaler8 = 3U, kQDC_Prescaler16 = 4U, kQDC_Prescaler32 = 5U, kQDC_Prescaler64 = 6U, kQDC_Prescaler128 = 7U, kQDC_Prescaler256 = 8U, kQDC_Prescaler512 = 9U, kQDC_Prescaler1024 = 10U, kQDC_Prescaler2048 = 11U, kQDC_Prescaler4096 = 12U, kQDC_Prescaler8192 = 13U, kQDC_Prescaler16384 = 14U, kQDC_Prescaler32768 = 15U }
	Prescaler used by Last Edge Time (LASTEDGE) and Position Difference Period Counter (POSDPER). More...

Driver version
#define	FSL_QDC_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))

Initialization and deinitialization Interfaces
void	QDC_Init (QDC_Type base, const qdc_config_t psConfig)
	Initializes the QDC module. More...

void	QDC_GetDefaultConfig (qdc_config_t *psConfig)
	Gets an available pre-defined configuration. More...

void	QDC_Deinit (QDC_Type *base)
	De-initializes the QDC module. More...

Watchdog
static void	QDC_EnableWatchdog (QDC_Type *base, bool bEnable)
	Enable watchdog for QDC module. More...

static void	QDC_SetWatchdogTimeout (QDC_Type *base, uint16_t u16Timeout)
	Set watchdog timeout value. More...

Status
static uint16_t	QDC_GetStatusFlags (QDC_Type *base)
	Get the status flags. More...

static void	QDC_ClearStatusFlags (QDC_Type *base, uint16_t u16Flags)
	Clear the status flags. More...

static uint16_t	QDC_GetSignalStatusFlags (QDC_Type *base)
	Get the signals' real-time status. More...

static qdc_count_direction_flag_t	QDC_GetLastCountDirection (QDC_Type *base)
	Get the direction of the last count. More...

Interrupts
static void	QDC_EnableInterrupts (QDC_Type *base, uint16_t u16Interrupts)
	Enable the interrupts. More...

static void	QDC_DisableInterrupts (QDC_Type *base, uint16_t u16Interrupts)
	Disable the interrupts. More...

Counter Operation
static void	QDC_DoSoftwareLoadInitialPositionValue (QDC_Type *base)
	Load the initial position value to position counter. More...

static void	QDC_SetInitialPositionValue (QDC_Type *base, uint32_t u32PositionInitValue)
	Set initial position value for QDC module. More...

static void	QDC_SetPositionCounterValue (QDC_Type *base, uint32_t u32PositionCounterValue)
	Set position counter value. More...

static void	QDC_SetPositionModulusValue (QDC_Type *base, uint32_t u32PositionModulusValue)
	Set position counter modulus value. More...

static void	QDC_SetPositionCompareValue (QDC_Type *base, uint32_t u32PositionCompValue)
	Set position counter compare value. More...

static void	QDC_SetPositionCompare1Value (QDC_Type *base, uint32_t u32PositionComp1Value)
	Set position counter compare 1 value. More...

static uint32_t	QDC_GetPosition (QDC_Type *base)
	Get the current position counter's value. More...

static uint32_t	QDC_GetHoldPosition (QDC_Type *base)
	Get the hold position counter's value. More...

static uint16_t	QDC_GetPositionDifference (QDC_Type *base)
	Get the position difference counter's value. More...

static uint16_t	QDC_GetHoldPositionDifference (QDC_Type *base)
	Get the hold position difference counter's value. More...

static uint16_t	QDC_GetRevolution (QDC_Type *base)
	Get the revolution counter's value. More...

static uint16_t	QDC_GetHoldRevolution (QDC_Type *base)
	Get the hold revolution counter's value. More...

static uint16_t	QDC_GetLastEdgeTime (QDC_Type *base)
	Get the last edge time. More...

static uint16_t	QDC_GetHoldLastEdgeTime (QDC_Type *base)
	Get the hold last edge time. More...

static uint16_t	QDC_GetPositionDifferencePeriod (QDC_Type *base)
	Get the Position Difference Period counter value. More...

static uint16_t	QDC_GetBufferedPositionDifferencePeriod (QDC_Type *base)
	Get buffered Position Difference Period counter value. More...

static uint16_t	QDC_GetHoldPositionDifferencePeriod (QDC_Type *base)
	Get Hold Position Difference Period counter value. More...

Data Structure Documentation

struct qdc_config_t

Data Fields
bool	bEnableReverseDirection
	Enable reverse direction counting. More...

qdc_decoder_work_mode_t	eDecoderWorkMode
	Use standard quadrature decoder mode or signal phase count mode. More...

qdc_home_init_pos_counter_mode_t	eHomeInitPosCounterMode
	Select how HOME signal used to initialize position counters. More...

qdc_index_init_pos_counter_mode_t	eIndexInitPosCounterMode
	Select how INDEX signal used to initialize position counters. More...

bool	bEnableTriggerInitPositionCounter
	Initialize position counter with initial register(UINIT, LINIT) value on TRIGGER's rising edge. More...

bool	bEnableTriggerClearPositionRegisters
	Clear position counter(POS), revolution counter(REV), position difference counter (POSD) on TRIGGER's rising edge. More...

bool	bEnableTriggerHoldPositionRegisters
	Load position counter(POS), revolution counter(REV), position difference counter (POSD) values to hold registers on TRIGGER's rising edge. More...

bool	bEnableWatchdog
	Enable the watchdog to detect if the target is moving or not. More...

uint16_t	u16WatchdogTimeoutValue
	Watchdog timeout count value. More...

qdc_filter_sample_count_t	eFilterSampleCount
	Input Filter Sample Count. More...

uint8_t	u8FilterSamplePeriod
	Input Filter Sample Period. More...

qdc_output_pulse_mode_t	eOutputPulseMode
	The condition of POSMATCH pulses. More...

uint32_t	u32PositionCompareValue
	Position compare value. More...

uint32_t	u32PositionCompare1Value
	Position compare 1 value. More...

qdc_revolution_count_condition_t	eRevolutionCountCondition
	Revolution Counter Modulus Enable. More...

bool	bEnableModuloCountMode
	Enable Modulo Counting. More...

uint32_t	u32PositionModulusValue
	Position modulus value. More...

uint32_t	u32PositionInitialValue
	Position initial value. More...

uint32_t	u32PositionCounterValue
	Position counter value. More...

bool	bEnablePeriodMeasurement
	Enable period measurement. More...

qdc_prescaler_t	ePrescaler
	Prescaler. More...

uint16_t	u16EnabledInterruptsMask
	Mask of interrupts to be enabled, should be OR'ed value of _qdc_interrupt_enable. More...

Field Documentation

bool qdc_config_t::bEnableReverseDirection

qdc_decoder_work_mode_t qdc_config_t::eDecoderWorkMode

qdc_home_init_pos_counter_mode_t qdc_config_t::eHomeInitPosCounterMode

qdc_index_init_pos_counter_mode_t qdc_config_t::eIndexInitPosCounterMode

bool qdc_config_t::bEnableTriggerInitPositionCounter

bool qdc_config_t::bEnableTriggerClearPositionRegisters

bool qdc_config_t::bEnableTriggerHoldPositionRegisters

bool qdc_config_t::bEnableWatchdog

uint16_t qdc_config_t::u16WatchdogTimeoutValue

It stores the timeout count for the quadrature decoder module watchdog timer.

qdc_filter_sample_count_t qdc_config_t::eFilterSampleCount

This value should be chosen to reduce the probability of noisy samples causing an incorrect transition to be recognized. The value represent the number of consecutive samples that must agree prior to the input filter accepting an input transition.

uint8_t qdc_config_t::u8FilterSamplePeriod

This value should be set such that the sampling period is larger than the period of the expected noise. This value represents the sampling period (in IPBus clock cycles) of the decoder input signals. The available range is 0 - 255.

qdc_output_pulse_mode_t qdc_config_t::eOutputPulseMode

uint32_t qdc_config_t::u32PositionCompareValue

The available value is a 32-bit number.

uint32_t qdc_config_t::u32PositionCompare1Value

The available value is a 32-bit number.

qdc_revolution_count_condition_t qdc_config_t::eRevolutionCountCondition

bool qdc_config_t::bEnableModuloCountMode

uint32_t qdc_config_t::u32PositionModulusValue

Only used when bEnableModuloCountMode is true. The available value is a 32-bit number.

uint32_t qdc_config_t::u32PositionInitialValue

The available value is a 32-bit number.

uint32_t qdc_config_t::u32PositionCounterValue

When Modulo mode enabled, the u32PositionCounterValue should be in the range of u32PositionInitialValue and u32PositionModulusValue.

bool qdc_config_t::bEnablePeriodMeasurement

When enabled, the position difference hold register (POSDH) is only updated when position difference register (POSD) is read.

qdc_prescaler_t qdc_config_t::ePrescaler

uint16_t qdc_config_t::u16EnabledInterruptsMask

Enumeration Type Documentation

enum _qdc_status_flags

Enumerator
kQDC_HomeTransitionFlag	HOME signal transition occured.
kQDC_IndexPulseFlag	INDEX pulse occured.
kQDC_WatchdogTimeoutFlag	Watchdog timeout occured.
kQDC_PositionCompareFlag	Position counter match the COMP value.
kQDC_SimultPhaseChangeFlag	Simultaneous change of PHASEA and PHASEB occured.
kQDC_PositionRollOverFlag	Position counter rolls over from 0xFFFFFFFF to 0, or from MOD value to INIT value.
kQDC_PositionRollUnderFlag	Position register roll under from 0 to 0xFFFFFFFF, or from INIT value to MOD value.
kQDC_PositionCompare1Flag	Position counter match the COMP1 value.

enum _qdc_signal_status

Enumerator
kQDC_SignalStatusRawHome	Raw HOME input.
kQDC_SignalStatusRawIndex	Raw INDEX input.
kQDC_SignalStatusRawPhaseB	Raw PHASEB input.
kQDC_SignalStatusRawPhaseA	Raw PHASEA input.
kQDC_SignalStatusFilteredHome	The filtered HOME input.
kQDC_SignalStatusFilteredIndex	The filtered INDEX input.
kQDC_SignalStatusFilteredPhaseB	The filtered PHASEB input.
kQDC_SignalStatusFilteredPhaseA	The filtered PHASEA input.

enum _qdc_interrupt_enable

Enumerator
kQDC_HomeTransitionInterruptEnable	HOME signal transition interrupt enable.
kQDC_IndexPulseInterruptEnable	INDEX pulse interrupt enable.
kQDC_WatchdogTimeoutInterruptEnable	Watchdog timeout interrupt enable.
kQDC_PositionCompareInerruptEnable	Position compare interrupt enable.
kQDC_SimultPhaseChangeInterruptEnable	Simultaneous PHASEA and PHASEB change interrupt enable.
kQDC_PositionRollOverInterruptEnable	Roll-over interrupt enable.
kQDC_PositionRollUnderInterruptEnable	Roll-under interrupt enable.
kQDC_PositionCompare1InerruptEnable	Position compare 1 interrupt enable.

enum qdc_home_init_pos_counter_mode_t

Enumerator
kQDC_HomeInitPosCounterDisabled	Don't use HOME signal to initialize the position counter.
kQDC_HomeInitPosCounterOnRisingEdge	Use positive going edge to trigger initialization of position counters.
kQDC_HomeInitPosCounterOnFallingEdge	Use negative going edge to trigger initialization of position counters.

enum qdc_index_init_pos_counter_mode_t

Enumerator
kQDC_IndexInitPosCounterDisabled	INDEX pulse does not initialize the position counter.
kQDC_IndexInitPosCounterOnRisingEdge	Use INDEX pulse rising edge to initialize position counter.
kQDC_IndexInitPosCounterOnFallingEdge	Use INDEX pulse falling edge to initialize position counter.

enum qdc_decoder_work_mode_t

In normal work mode uses the standard quadrature decoder with PHASEA and PHASEB. In signal phase count mode, a positive transition of the PHASEA input generates a count signal while the PHASEB input and the reverse direction control the counter direction. If the reverse direction is not enabled, PHASEB = 0 means counting up and PHASEB = 1 means counting down. If the reverse direction is enabled, PHASEB = 0 means counting down and PHASEB = 1 means counting up.

Enumerator
kQDC_DecoderQuadratureMode	Use standard quadrature decoder with PHASEA and PHASEB.
kQDC_DecoderSignalPhaseCountMode	PHASEA input generates a count signal while PHASEB input control the direction.

enum qdc_output_pulse_mode_t

Enumerator
kQDC_OutputPulseOnCounterEqualCompare	POSMATCH pulses when a match occurs between the position counters (POS) and the compare value (COMP, COMP1).
kQDC_OutputPulseOnReadingPositionCounter	POSMATCH pulses when reading position counter(POS), revolution counter(REV), position difference counter(POSD).

enum qdc_revolution_count_condition_t

Enumerator
kQDC_RevolutionCountOnIndexPulse	Use INDEX pulse to increment/decrement revolution counter.
kQDC_RevolutionCountOnRollOverModulus	Use modulus counting roll-over/under to increment/decrement revolution counter.

enum qdc_filter_sample_count_t

The Input Filter Sample Count represents the number of consecutive samples that must agree, before the input filter accepts an input transition

Enumerator
kQDC_Filter3Samples	3 samples.
kQDC_Filter4Samples	4 samples.
kQDC_Filter5Samples	5 samples.
kQDC_Filter6Samples	6 samples.
kQDC_Filter7Samples	7 samples.
kQDC_Filter8Samples	8 samples.
kQDC_Filter9Samples	9 samples.
kQDC_Filter10Samples	10 samples.

enum qdc_count_direction_flag_t

Enumerator
kQDC_CountDirectionDown	Last count was in down direction.
kQDC_CountDirectionUp	Last count was in up direction.

enum qdc_prescaler_t

Enumerator
kQDC_Prescaler1	Prescaler value 1.
kQDC_Prescaler2	Prescaler value 2.
kQDC_Prescaler4	Prescaler value 4.
kQDC_Prescaler8	Prescaler value 8.
kQDC_Prescaler16	Prescaler value 16.
kQDC_Prescaler32	Prescaler value 32.
kQDC_Prescaler64	Prescaler value 64.
kQDC_Prescaler128	Prescaler value 128.
kQDC_Prescaler256	Prescaler value 256.
kQDC_Prescaler512	Prescaler value 512.
kQDC_Prescaler1024	Prescaler value 1024.
kQDC_Prescaler2048	Prescaler value 2048.
kQDC_Prescaler4096	Prescaler value 4096.
kQDC_Prescaler8192	Prescaler value 8192.
kQDC_Prescaler16384	Prescaler value 16384.
kQDC_Prescaler32768	Prescaler value 32768.

Function Documentation

void QDC_Init	(	QDC_Type *	base,
		const qdc_config_t *	psConfig
	)

This function initializes the QDC by:

Enable the IP bus clock (optional).
Configure module based on the configuration structure.

Parameters

base	QDC peripheral base address.
psConfig	Pointer to configuration structure.

void QDC_GetDefaultConfig ( qdc_config_t * psConfig )

The default value are:

psConfig->bEnableReverseDirection              = false;
psConfig->eDecoderWorkMode                     = kQDC_DecoderQuadratureMode;
psConfig->eHomeInitPosCounterMode              = kQDC_HomeInitPosCounterDisabled;
psConfig->eIndexInitPosCounterMode             = kQDC_IndexInitPosCounterDisabled;
psConfig->bEnableTriggerInitPositionCounter    = false;
psConfig->bEnableTriggerClearPositionRegisters = false;
psConfig->bEnableTriggerHoldPositionRegisters  = false;
psConfig->bEnableWatchdog                      = false;
psConfig->u16WatchdogTimeoutValue              = 0xFFFFU;
psConfig->eFilterSampleCount                   = kQDC_Filter3Samples;
psConfig->u8FilterSamplePeriod                 = 0U;
psConfig->eOutputPulseMode                     = kQDC_OutputPulseOnCounterEqualCompare;
psConfig->u32PositionCompareValue              = 0xFFFFFFFFU;
psConfig->u32PositionCompare1Value             = 0xFFFFFFFFU;
psConfig->eRevolutionCountCondition            = kQDC_RevolutionCountOnIndexPulse;
psConfig->bEnableModuloCountMode               = false;
psConfig->u32PositionModulusValue              = 0U;
psConfig->u32PositionInitialValue              = 0U;
psConfig->u32PositionCounterValue              = 0U;
psConfig->bEnablePeriodMeasurement             = false;
psConfig->ePrescaler                           = kQDC_Prescaler1;
psConfig->u16EnabledInterruptsMask             = 0U;

Parameters

psConfig Pointer to configuration structure.

void QDC_Deinit ( QDC_Type * base )

This function deinitializes the QDC by:

Disables the IP bus clock (optional).

Parameters

base	QDC peripheral base address.

static void QDC_EnableWatchdog	(	QDC_Type *	base,
		bool	bEnable
	)

inlinestatic

Parameters

base	QDC peripheral base address
bEnable	Enables or disables the watchdog

static void QDC_SetWatchdogTimeout	(	QDC_Type *	base,
		uint16_t	u16Timeout
	)

inlinestatic

Parameters

base	QDC peripheral base address
u16Timeout	Number of clock cycles, plus one clock cycle that the watchdog timer counts before timing out

static uint16_t QDC_GetStatusFlags ( QDC_Type * base )

inlinestatic

Parameters

base	QDC peripheral base address.

Returns: Logical OR'ed value of the status flags, _qdc_status_flags.

static void QDC_ClearStatusFlags	(	QDC_Type *	base,
		uint16_t	u16Flags
	)

inlinestatic

Parameters

base	QDC peripheral base address.
u16Flags	Logical OR'ed value of the flags to clear, _qdc_status_flags.

static uint16_t QDC_GetSignalStatusFlags ( QDC_Type * base )

inlinestatic

Parameters

base	QDC peripheral base address.

Returns: Logical OR'ed value of the real-time signal status, _qdc_signal_status.

static qdc_count_direction_flag_t QDC_GetLastCountDirection ( QDC_Type * base )

inlinestatic

Parameters

base	QDC peripheral base address.

Returns: Direction of the last count.

static void QDC_EnableInterrupts	(	QDC_Type *	base,
		uint16_t	u16Interrupts
	)

inlinestatic

Parameters

base	QDC peripheral base address.
u16Interrupts	Logical OR'ed value of the interrupts, _qdc_interrupt_enable.

static void QDC_DisableInterrupts	(	QDC_Type *	base,
		uint16_t	u16Interrupts
	)

inlinestatic

Parameters

base	QDC peripheral base address.
u32Interrupts	Logical OR'ed value of the interrupts, _qdc_interrupt_enable.

static void QDC_DoSoftwareLoadInitialPositionValue ( QDC_Type * base )

inlinestatic

Software trigger to load the initial position value (UINIT and LINIT) contents to position counter (UPOS and LPOS), so that to provide the consistent operation the position counter registers.

Parameters

base	QDC peripheral base address.

static void QDC_SetInitialPositionValue	(	QDC_Type *	base,
		uint32_t	u32PositionInitValue
	)

inlinestatic

Set the position counter initial value (INIT or UINIT, LINIT).

Parameters

base	QDC peripheral base address
u32PositionInitValue	Position initial value

static void QDC_SetPositionCounterValue	(	QDC_Type *	base,
		uint32_t	u32PositionCounterValue
	)

inlinestatic

Set the position counter value (POS or UPOS, LPOS).

Parameters

base	QDC peripheral base address
u32PositionCounterValue	Position counter value

static void QDC_SetPositionModulusValue	(	QDC_Type *	base,
		uint32_t	u32PositionModulusValue
	)

inlinestatic

Set the position counter modulus value (MOD or UMOD, LMOD).

Parameters

base	QDC peripheral base address
u32PositionModulusValue	Position modulus value

static void QDC_SetPositionCompareValue	(	QDC_Type *	base,
		uint32_t	u32PositionCompValue
	)

inlinestatic

Set the position counter compare value (COMP or UCOMP, LCOMP).

Parameters

base	QDC peripheral base address
u32PositionCompValue	Position modulus value

static void QDC_SetPositionCompare1Value	(	QDC_Type *	base,
		uint32_t	u32PositionComp1Value
	)

inlinestatic

Set the position counter compare 1 value (COMP1 or UCOMP1, LCOMP1).

Parameters

base	QDC peripheral base address
u32PositionComp1Value	Position modulus value

static uint32_t QDC_GetPosition ( QDC_Type * base )

inlinestatic

Parameters

base	QDC peripheral base address.

Returns: Current position counter's value.

static uint32_t QDC_GetHoldPosition ( QDC_Type * base )

inlinestatic

The position counter (POS or UPOS, LPOS) value is loaded to hold position (POSH or UPOSH, LPOSH) when:

Position register (POS or UPOS, LPOS), or position difference register (POSD), or revolution register (REV) is read.
TRIGGER happens and TRIGGER is enabled to update the hold registers.

Parameters

base	QDC peripheral base address.

Returns: Hold position counter's value.

static uint16_t QDC_GetPositionDifference ( QDC_Type * base )

inlinestatic

Parameters

base	QDC peripheral base address.

Returns: The position difference counter's value.

static uint16_t QDC_GetHoldPositionDifference ( QDC_Type * base )

inlinestatic

The position difference (POSD) value is loaded to hold position difference (POSDH) when:

Position register (POS or UPOS, LPOS), or position difference register (POSD), or revolution register (REV) is read. When Period Measurement is enabled (CTRL3[PMEN] = 1), POSDH will only be udpated when reading POSD.
TRIGGER happens and TRIGGER is enabled to update the hold registers.

Parameters

base	QDC peripheral base address.

Returns: Hold position difference counter's value.

static uint16_t QDC_GetRevolution ( QDC_Type * base )

inlinestatic

Get the revolution counter (REV) value.

Parameters

base	QDC peripheral base address.

Returns: The revolution counter's value.

static uint16_t QDC_GetHoldRevolution ( QDC_Type * base )

inlinestatic

The revolution counter (REV) value is loaded to hold revolution (REVH) when:

Position register (POS or UPOS, LPOS), or position difference register (POSD), or revolution register (REV) is read.
TRIGGER happens and TRIGGER is enabled to update the hold registers.

Parameters

base	QDC peripheral base address.

Returns: Hold position revolution counter's value.

static uint16_t QDC_GetLastEdgeTime ( QDC_Type * base )

inlinestatic

Last edge time (LASTEDGE) is the time since the last edge occurred on PHASEA or PHASEB. The last edge time register counts up using the peripheral clock after prescaler. Any edge on PHASEA or PHASEB will reset this register to 0 and start counting. If the last edge timer count reaches 0xffff, the counting will stop in order to prevent an overflow.

Parameters

base	QDC peripheral base address.

Returns: The last edge time.

static uint16_t QDC_GetHoldLastEdgeTime ( QDC_Type * base )

inlinestatic

The hold of last edge time(LASTEDGEH) is update to last edge time(LASTEDGE) when the position difference register register (POSD) is read.

Parameters

base	QDC peripheral base address.

Returns: Hold of last edge time.

static uint16_t QDC_GetPositionDifferencePeriod ( QDC_Type * base )

inlinestatic

The Position Difference Period counter (POSDPER) counts up using the prescaled peripheral clock. When reading the position difference register(POSD), the last edge time (LASTEDGE) will be loaded to position difference period counter(POSDPER). If the POSDPER count reaches 0xffff, the counting will stop in order to prevent an overflow. Counting will continue when an edge occurs on PHASEA or PHASEB.

Parameters

base	QDC peripheral base address.

Returns: The position difference period counter value.

static uint16_t QDC_GetBufferedPositionDifferencePeriod ( QDC_Type * base )

inlinestatic

The Bufferd Position Difference Period (POSDPERBFR) value is updated with the position difference period counter(POSDPER) when any edge occurs on PHASEA or PHASEB.

Parameters

base	QDC peripheral base address.

Returns: The buffered position difference period counter value.

static uint16_t QDC_GetHoldPositionDifferencePeriod ( QDC_Type * base )

inlinestatic

The hold position difference period(POSDPERH) is updated with the value of buffered position difference period(POSDPERBFR) when the position difference(POSD) register is read.

Parameters

base	QDC peripheral base address.

Returns: The hold position difference period counter value.

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