FlexTimer Peripheral Driver

The section describes the programming interface of the FlexTimer Peripheral driver. More...

Data Structures
struct	ftm_channel_info_t
	Channel information. More...
struct	ftm_combined_channel_info_t
	Combines channel information. More...
struct	ftm_user_config_t
	Internal driver state information grouped by naming. More...
struct	ftm_pwm_param_t
	FlexTimer driver PWM parameter. More...

Functions
void	ftm_init (uint8_t instance, ftm_user_config_t *info)
	Initializes the FTM driver. More...
void	ftm_shutdown (ftm_user_config_t *state)
	Shuts down the FTM driver. More...
void	ftm_pwm_start (ftm_user_config_t *info, uint8_t channel)
	Starts channel PWM. More...
void	ftm_pwm_stop (ftm_user_config_t *info, uint8_t channel)
	Stops channel PWM. More...
void	ftm_pwm_configure (ftm_user_config_t *info, uint8_t channel, ftm_pwm_param_t *param)
	Configures duty cycle and frequency of the channel PWM. More...

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Data Structure Documentation

struct ftm_channel_info_t

Data Fields
ftm_config_mode_t	mode
	FlexTimer operation mode.
ftm_edge_mode_t	edge_mode
	capture mode
bool	isChannelEnabled
bool	isSoftwareOutputCTRL
bool	isSoftwareOutput
	1:output high 0:output low
bool	isChannlePinEnabled
bool	isChannelInterrupt
bool	isChannelDMA
uint8_t	inputCaptureFilterVal

struct ftm_combined_channel_info_t

Data Fields
bool	isComplementaryMode
bool	isFaultCTRLEnabled
bool	isSyncEnabled
bool	isDeadTimeEnabled
bool	isInvertingEnabled

struct ftm_user_config_t

User needs to set the relevant ones.

Data Fields
uint8_t	instance
	name FTM instance FTM0, FTM1, FTM2, FTM3
ftm_clock_source_t	clockSrc
ftm_clock_ps_t	clockPS
uint16_t	counterInitVal
uint16_t	counterMod
uint32_t	frequencyHZ
ftm_deadtime_ps_t	deadtimePrescaler
uint8_t	uDeadTimeCount
uint8_t	uNumOfOverflows
bool	isFTMMode
uint8_t	BDMMode
bool	isGlobalTimeBase
bool	isGlobalTimeOutput
bool	isWriteProtection
ftm_combined_channel_info_t	combinedChanSetting [HW_FTM_CHANNEL_PAIR_COUNT]
bool	isEnhancedSyncMode
bool	isHWTriggerMode
bool	isCNTINSync
bool	isINVCTRLSync
bool	isSWOCCTRLsync
bool	isSWTriggermode
bool	isOutmaskSync
bool	isMinLoadingPoint
bool	isMaxLoadingPoint
bool	isExternalCINTTrigger
bool	isExternalChan0Trigger
bool	isExternalChan1Trigger
bool	isExternalChan2Trigger
bool	isExternalChan3Trigger
bool	isExternalChan4Trigger
bool	isExternalChan5Trigger
bool	isFaultCTRLMode
bool	isFaultInputFilter
bool	isFaultInput0Filter
bool	isFaultInput0Polarity
bool	isFaultInput1Filter
bool	isFaultInput1Polarity
bool	isFaultInput2Filter
bool	isFaultInput2Polarity
bool	isFaultInput3Filter
bool	isFaultInput3Polarity
ftm_channel_info_t	channleInfo [HW_FTM_CHANNEL_COUNT]
bool	enableFaultPin0
bool	enableFaultPin1
bool	enableFaultPin2
bool	enableFaultPin3
uint8_t	externalClockPin
bool	isHardwareTrigger0
bool	isHardwareTrigger1
bool	isHardwareTrigger2
uint8_t	interruptPriority
uint8_t	interruptInstance
bool	isInterruptRequest
bool	isTimerOverFlowInterrupt
bool	isFaultInterrupt
bool	isInitChannelOutput
bool	isLoadEnable
bool	isChannel0LoadSel
bool	isChannel1LoadSel
bool	isChannel2LoadSel
bool	isChannel3LoadSel
bool	isChannel4LoadSel
bool	isChannel5LoadSel
bool	isChannel6LoadSel
bool	isChannel7LoadSel

struct ftm_pwm_param_t

Setting uPulseHigPercentage = 1, uPulseLowPulsePercentage = 1 means sin wave equal to low and high width.

Data Fields
uint32_t	uFrequencyHZ
	PWM period.
uint32_t	uPulseHighPercentage
	High pulse width period.
uint32_t	uPulseLowPercentage
	Low pulse width period.
uint16_t	uCnV
	In combined mode, the n channel count value, the duty cycle=|Cn+1V -CnV|.

Function Documentation

void ftm_init	(	uint8_t	instance,
		ftm_user_config_t *	info
	)

Parameters

instance	The FTM peripheral instance number.
info	The FTM user config structure.

void ftm_shutdown

(

ftm_user_config_t *

state

)

Parameters

state

The FTM user config structure.

void ftm_pwm_start	(	ftm_user_config_t *	info,
		uint8_t	channel
	)

Parameters

info	The FTM user config structure.
channel	The channel or channel pair number(combined mode).

void ftm_pwm_stop	(	ftm_user_config_t *	info,
		uint8_t	channel
	)

Parameters

info	The FTM user config structure.
channel	The channel or channel pair number(combined mode).

void ftm_pwm_configure	(	ftm_user_config_t *	info,
		uint8_t	channel,
		ftm_pwm_param_t *	param
	)

Parameters

info	The FTM user config structure.
channel	The channel or channel pair number(combined mode). For channel pair, channel= 0(0,1),1(2,3),2(4,5),3(6,7)
param	FTM driver PWM parameter to configure PWM options