PWM - Pulse Width Modulation (>v4.0.0)

Pulse Width Modulation (PWM) Software Driver for modules above revision >v4.0.0.

This driver provides an API to get access to the main features of the PWM controller.

Modules
	Related Project(s)
	In this section you can find all the projects related to the PWM - Pulse Width Modulation (>v4.0.0).

Data Structures
struct	pwm_compare_opt_t
struct	pwm_opt_t
	Input parameters when initializing a PWM channel. More...
struct	pwm_output_override_opt_t

Macros
#define	AVR32_PWM_LINES_MSB   4
	Local Definition for the number of PWM Lines. More...
#define	PWM_CKSEL_GCLK   1
	PWM Clock Input is Generic Clock. More...
#define	PWM_CKSEL_MCK   0
	PWM Clock Input is Master Clock. More...
#define	PWM_COMPARE_MODE_DOWN   1
	PWM Compare DOWN. More...
#define	PWM_COMPARE_MODE_UP   0
	PWM Compare UP. More...
#define	PWM_COMPARE_OFF   0
	PWM Compare OFF. More...
#define	PWM_COMPARE_ON   1
	PWM Compare ON. More...
#define	PWM_EVENT_LINE0   (1<<AVR32_PWM_EL0MR_CSEL0_OFFSET)
#define	PWM_EVENT_LINE1   (1<<AVR32_PWM_EL0MR_CSEL1_OFFSET)
#define	PWM_EVENT_LINE2   (1<<AVR32_PWM_EL0MR_CSEL2_OFFSET)
#define	PWM_EVENT_LINE3   (1<<AVR32_PWM_EL0MR_CSEL3_OFFSET)
#define	PWM_EVENT_LINE4   (1<<AVR32_PWM_EL0MR_CSEL4_OFFSET)
#define	PWM_EVENT_LINE5   (1<<AVR32_PWM_EL0MR_CSEL5_OFFSET)
#define	PWM_EVENT_LINE6   (1<<AVR32_PWM_EL0MR_CSEL6_OFFSET)
#define	PWM_EVENT_LINE7   (1<<AVR32_PWM_EL0MR_CSEL7_OFFSET)
#define	PWM_FAILURE   -1
	Value returned by function when it was unable to complete successfully for some unspecified reason. More...
#define	PWM_FAULT_INPUT_ACTIVE_HIGH   1
	PWM Fault Input Active High State. More...
#define	PWM_FAULT_INPUT_ACTIVE_LOW   0
	PWM Fault Input Active Low State. More...
#define	PWM_FAULT_INPUT_FILTER_OFF   0
	PWM Fault Input Filtering Option OFF. More...
#define	PWM_FAULT_INPUT_FILTER_ON   1
	PWM Fault Input Filtering Option ON. More...
#define	PWM_FAULT_INPUT_NOT_USED   0
	PWM Fault Input Not Used. More...
#define	PWM_FAULT_INPUT_USED   1
	PWM Fault Input Used. More...
#define	PWM_FAULT_LINES   8
	PWM Number of Fault Lines. More...
#define	PWM_FAULT_MODE_LEVEL   0
	PWM Fault Mode Level. More...
#define	PWM_FAULT_MODE_TGL   1
	PWM Fault Mode Toggle. More...
#define	PWM_FAULT_OUTPUT   4
	PWM Fault Output Lines: PWM0,1,2,3 => 4. More...
#define	PWM_INVALID_ARGUMENT   1
	Value returned by function when the channel number is invalid. More...
#define	PWM_INVALID_INPUT   1
	Value returned by function when the input parameters are out of range. More...
#define	PWM_MODE_CENTER_ALIGNED   1
	Operate PWM channel in center aligned mode. More...
#define	PWM_MODE_LEFT_ALIGNED   0
	Operate PWM channel in left aligned mode. More...
#define	PWM_NO_WRITE_PROTECT_VIOLATION   0xFFFFFFFF
	PWM No Write To Protected Register Status. More...
#define	PWM_OOV_CTRL_OFF   0
	PWM Output Override Control OFF. More...
#define	PWM_OOV_CTRL_ON   1
	PWM Output Override Control ON. More...
#define	PWM_OOV_LINES   4
	PWM Ouptut Override Number of Lines: PWM0,1,2,3 => 4. More...
#define	PWM_OOV_VALUE_HIGH   1
	PWM Output Override Value High Level. More...
#define	PWM_OOV_VALUE_LOW   0
	PWM Output Override Value Low Level. More...
#define	PWM_OUTPUT_HIGH_WHEN_FAULT_DETECTION   1
	PWM Output High Level when fault detection. More...
#define	PWM_OUTPUT_LOW_WHEN_FAULT_DETECTION   0
	PWM Output Low Level when fault detection. More...
#define	PWM_POLARITY_HIGH   1
	PWM channel starts output high level. More...
#define	PWM_POLARITY_LOW   0
	PWM channel starts output low level. More...
#define	PWM_SUCCESS   0
	Value returned by function when it completed successfully. More...
#define	PWM_SYNC_CHANNEL_OFF   1
	PWM Sync channel OFF. More...
#define	PWM_SYNC_CHANNEL_ON   1
	PWM Sync channel ON. More...
#define	PWM_SYNC_UPDATE_AUTO_WRITE_AUTO_UPDATE   2
	PWM Automatic Write And Automatic Update Period, Duty Cycle and Event Method. More...
#define	PWM_SYNC_UPDATE_MANUAL_WRITE_AUTO_UPDATE   1
	PWM Manual Write And Automatic Update Period, Duty Cycle and Event Method. More...
#define	PWM_SYNC_UPDATE_MANUAL_WRITE_MANUAL_UPDATE   0
	PWM Manual Write And Manual Update Period, Duty Cycle and Event Method. More...
#define	PWM_UPDATE_DUTY   0
	PWM channel write in CUPDx updates duty cycle at the next period start event. More...
#define	PWM_UPDATE_PERIOD   1
	PWM channel write in CUPDx updates period at the next period start event. More...
#define	PWM_UPDLOCK_TRIGGER   1
	PWM Update Lock State. More...
#define	PWM_WPKEY   0x50574D
	PWM Protection Key. More...

Functions
int	pwm_channel_init (unsigned int channel_id, const avr32_pwm_channel_t *pwm_channel)
	Initialize a specific PWM channel. More...
void	pwm_clr_fault_status (void)
	Return Fault Status. More...
int	pwm_compare_disable (int line)
	Compare Match Disable. More...
int	pwm_compare_enable (int line)
	Compare Match Enable. More...
int	pwm_compare_event_disable (int line, int event_line)
	Compare Event Disable. More...
int	pwm_compare_event_enable (int line, int event_line)
	Compare Event Enable. More...
int	pwm_compare_match_reload_setup (int line, pwm_compare_opt_t *pwm_compare_t)
	Compare Match Reload Setup. More...
int	pwm_compare_match_setup (int line, pwm_compare_opt_t *pwm_compare_t)
	Compare Match Setup. More...
int	pwm_compare_reload_update_period_value (int line, pwm_compare_opt_t *pwm_compare_t)
	Compare Reload Update Period. More...
int	pwm_compare_update_period_value (int line, pwm_compare_opt_t *pwm_compare_t)
	Fault Lines Enable function. More...
int	pwm_fault_lines_enable (U8 line, U8 channel)
	Fault Lines Enable function. More...
int	pwm_fault_lines_level_setup (U8 line, U8 channel_high, U8 channel_low)
	Fault Lines Level Setup Function. More...
int	pwm_fault_lines_polarity_setup (U8 line, U8 polarity, U8 mode, U8 filter)
	Fault Lines Level Polarity Function. More...
int	pwm_get_fault_status (void)
	Get Fault Status. More...
unsigned int	pwm_get_update_period_counter_value (void)
	Return Current Counter of Update Period Value. More...
int	pwm_init (pwm_opt_t *opt)
	This function initialize the PWM controller (mode register) and disable the interrupt. More...
int	pwm_interrupt_update_channel (unsigned int channel_id, const avr32_pwm_channel_t *pwm_channel)
	Update channel register CPRDx or CDTYx with the interrupt method. This function uses the CUPDx register as a double buffer for the period or the duty cycle. Only the first 20 bits of cupd are significant. More...
int	pwm_output_override_setup (pwm_output_override_opt_t *opt)
	Output Override Configuration. This function uses the OS and OOV registers. More...
int	pwm_output_override_write (pwm_output_override_opt_t *opt)
	Output Override Set. This function uses the OS and OOV registers. More...
int	pwm_start_channels (unsigned long channels_bitmask)
	Start PWM channels. More...
int	pwm_stop_channels (unsigned long channels_bitmask)
	Stop PWM channels. More...
int	pwm_synchronous_prepare_update (unsigned int channel_id, const avr32_pwm_channel_t *pwm_channel)
	Prepare a Synchronous Channel, User should call this function for all the synchronous channel. More...
int	pwm_update_auto_write_auto_update_check_eot (void)
	Synchronous Update with Manual Write and Auto Update Method. More...
int	pwm_update_auto_write_auto_update_check_ready (void)
	Synchronous Update with Manual Write and Auto Update Method. More...
int	pwm_update_channel (unsigned int channel_id, const avr32_pwm_channel_t *pwm_channel)
	Update channel register CPRDx or CDTYx with the polling method. This function uses the CUPDx register as a double buffer for the period or the duty cycle. Only the first 20 bits of cupd are significant. More...
int	pwm_update_manual_write_auto_update (void)
	Synchronous Update with Manual Write and Auto Update Method. More...
int	pwm_update_manual_write_manual_update (void)
	Synchronous Update with Manual Write and Manual Update Method. More...
int	pwm_update_period_value (unsigned int value)
	Define Update Period Value For Update Of Synchronous Channel. More...
int	pwm_update_period_value_update (unsigned int value)
	Define Update Period Value For Update Of Synchronous Channel after a first init. More...
int	pwm_write_protect_hw_lock (int group)
	Hardware Write Protect Lock Function. This function uses the WPMR register. More...
U32	pwm_write_protect_status (void)
	Write Protect Status Function. This function uses the WPSR register. More...
int	pwm_write_protect_sw_lock (int group)
	Software Write Protect Lock Function. This function uses the WPMR register. More...
int	pwm_write_protect_sw_unlock (int group)
	Software Write Protect Unlock Function. This function uses the WPMR register. More...

#define AVR32_PWM_LINES_MSB   4

Local Definition for the number of PWM Lines.

Referenced by pwm_channel_init(), pwm_init(), pwm_interrupt_update_channel(), pwm_start_channels(), pwm_stop_channels(), pwm_synchronous_prepare_update(), and pwm_update_channel().

#define PWM_CKSEL_GCLK   1

PWM Clock Input is Generic Clock.

Referenced by main().

#define PWM_CKSEL_MCK   0

PWM Clock Input is Master Clock.

#define PWM_COMPARE_MODE_DOWN   1

PWM Compare DOWN.

#define PWM_COMPARE_MODE_UP   0

PWM Compare UP.

#define PWM_COMPARE_OFF   0

PWM Compare OFF.

#define PWM_COMPARE_ON   1

PWM Compare ON.

#define PWM_EVENT_LINE0   (1<<AVR32_PWM_EL0MR_CSEL0_OFFSET)

#define PWM_EVENT_LINE1   (1<<AVR32_PWM_EL0MR_CSEL1_OFFSET)

#define PWM_EVENT_LINE2   (1<<AVR32_PWM_EL0MR_CSEL2_OFFSET)

#define PWM_EVENT_LINE3   (1<<AVR32_PWM_EL0MR_CSEL3_OFFSET)

#define PWM_EVENT_LINE4   (1<<AVR32_PWM_EL0MR_CSEL4_OFFSET)

#define PWM_EVENT_LINE5   (1<<AVR32_PWM_EL0MR_CSEL5_OFFSET)

#define PWM_EVENT_LINE6   (1<<AVR32_PWM_EL0MR_CSEL6_OFFSET)

#define PWM_EVENT_LINE7   (1<<AVR32_PWM_EL0MR_CSEL7_OFFSET)

#define PWM_FAILURE   -1

Value returned by function when it was unable to complete successfully for some unspecified reason.

Referenced by pwm_write_protect_hw_lock(), pwm_write_protect_sw_lock(), and pwm_write_protect_sw_unlock().

#define PWM_FAULT_INPUT_ACTIVE_HIGH   1

PWM Fault Input Active High State.

#define PWM_FAULT_INPUT_ACTIVE_LOW   0

PWM Fault Input Active Low State.

#define PWM_FAULT_INPUT_FILTER_OFF   0

PWM Fault Input Filtering Option OFF.

#define PWM_FAULT_INPUT_FILTER_ON   1

PWM Fault Input Filtering Option ON.

#define PWM_FAULT_INPUT_NOT_USED   0

PWM Fault Input Not Used.

#define PWM_FAULT_INPUT_USED   1

PWM Fault Input Used.

#define PWM_FAULT_LINES   8

PWM Number of Fault Lines.

#define PWM_FAULT_MODE_LEVEL   0

PWM Fault Mode Level.

#define PWM_FAULT_MODE_TGL   1

PWM Fault Mode Toggle.

#define PWM_FAULT_OUTPUT   4

PWM Fault Output Lines: PWM0,1,2,3 => 4.

#define PWM_INVALID_ARGUMENT   1

Value returned by function when the channel number is invalid.

Referenced by pwm_channel_init().

#define PWM_INVALID_INPUT   1

Value returned by function when the input parameters are out of range.

Referenced by pwm_channel_init(), pwm_compare_event_disable(), pwm_compare_event_enable(), pwm_compare_match_reload_setup(), pwm_compare_match_setup(), pwm_fault_lines_enable(), pwm_fault_lines_level_setup(), pwm_fault_lines_polarity_setup(), pwm_init(), pwm_interrupt_update_channel(), pwm_output_override_setup(), pwm_output_override_write(), pwm_start_channels(), pwm_stop_channels(), pwm_synchronous_prepare_update(), and pwm_update_channel().

#define PWM_MODE_CENTER_ALIGNED   1

Operate PWM channel in center aligned mode.

#define PWM_MODE_LEFT_ALIGNED   0

Operate PWM channel in left aligned mode.

Referenced by main(), and tft_bl_init().

#define PWM_NO_WRITE_PROTECT_VIOLATION   0xFFFFFFFF

PWM No Write To Protected Register Status.

Referenced by pwm_write_protect_status().

#define PWM_OOV_CTRL_OFF   0

PWM Output Override Control OFF.

#define PWM_OOV_CTRL_ON   1

PWM Output Override Control ON.

#define PWM_OOV_LINES   4

PWM Ouptut Override Number of Lines: PWM0,1,2,3 => 4.

Referenced by pwm_init(), pwm_output_override_setup(), and pwm_output_override_write().

#define PWM_OOV_VALUE_HIGH   1

PWM Output Override Value High Level.

#define PWM_OOV_VALUE_LOW   0

PWM Output Override Value Low Level.

#define PWM_OUTPUT_HIGH_WHEN_FAULT_DETECTION   1

PWM Output High Level when fault detection.

#define PWM_OUTPUT_LOW_WHEN_FAULT_DETECTION   0

PWM Output Low Level when fault detection.

#define PWM_POLARITY_HIGH   1

PWM channel starts output high level.

Referenced by tft_bl_init().

#define PWM_POLARITY_LOW   0

PWM channel starts output low level.

Referenced by main().

#define PWM_SUCCESS   0

Value returned by function when it completed successfully.

Referenced by pwm_channel_init(), pwm_compare_event_disable(), pwm_compare_event_enable(), pwm_compare_match_reload_setup(), pwm_compare_match_setup(), pwm_fault_lines_enable(), pwm_fault_lines_level_setup(), pwm_fault_lines_polarity_setup(), pwm_init(), pwm_interrupt_update_channel(), pwm_output_override_setup(), pwm_output_override_write(), pwm_start_channels(), pwm_stop_channels(), pwm_synchronous_prepare_update(), pwm_update_auto_write_auto_update_check_eot(), pwm_update_auto_write_auto_update_check_ready(), pwm_update_channel(), pwm_update_manual_write_auto_update(), pwm_update_manual_write_manual_update(), pwm_update_period_value(), pwm_write_protect_hw_lock(), pwm_write_protect_sw_lock(), and pwm_write_protect_sw_unlock().

#define PWM_SYNC_CHANNEL_OFF   1

PWM Sync channel OFF.

#define PWM_SYNC_CHANNEL_ON   1

PWM Sync channel ON.

#define PWM_SYNC_UPDATE_AUTO_WRITE_AUTO_UPDATE   2

PWM Automatic Write And Automatic Update Period, Duty Cycle and Event Method.

Referenced by pwm_init().

#define PWM_SYNC_UPDATE_MANUAL_WRITE_AUTO_UPDATE   1

PWM Manual Write And Automatic Update Period, Duty Cycle and Event Method.

#define PWM_SYNC_UPDATE_MANUAL_WRITE_MANUAL_UPDATE   0

PWM Manual Write And Manual Update Period, Duty Cycle and Event Method.

Referenced by main().

#define PWM_UPDATE_DUTY   0

PWM channel write in CUPDx updates duty cycle at the next period start event.

Referenced by tft_bl_init().

#define PWM_UPDATE_PERIOD   1

PWM channel write in CUPDx updates period at the next period start event.

#define PWM_UPDLOCK_TRIGGER   1

PWM Update Lock State.

#define PWM_WPKEY   0x50574D

PWM Protection Key.

int pwm_channel_init	(	unsigned int	channel_id,
		const avr32_pwm_channel_t *	pwm_channel
	)

Initialize a specific PWM channel.

Parameters

channel_id	The channel identifier mask
*pwm_channel	Pointer to PWM channel struct avr32_pwm_channel_t

Returns

PWM_SUCCESS, PWM_INVALID_INPUT or PWM_INVALID_ARGUMENT

References AVR32_PWM_LINES_MSB, PWM_INVALID_ARGUMENT, PWM_INVALID_INPUT, and PWM_SUCCESS.

Referenced by main(), and tft_bl_init().

void pwm_clr_fault_status

(

void

)

Return Fault Status.

int pwm_compare_disable

(

int

line

)

Compare Match Disable.

Parameters

line	Compare Line to be used

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

int pwm_compare_enable

(

int

line

)

Compare Match Enable.

Parameters

line	Compare Line to be used

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

int pwm_compare_event_disable	(	int	line,
		int	event_line
	)

Compare Event Disable.

Parameters

line	Compare Line to be used
event_line	Event Line to be used

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_compare_event_enable	(	int	line,
		int	event_line
	)

Compare Event Enable.

Parameters

line	Compare Line to be used
event_line	Event Line to be used

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_compare_match_reload_setup	(	int	line,
		pwm_compare_opt_t *	pwm_compare_t
	)

Compare Match Reload Setup.

Parameters

line	Compare Line to be used
pwm_compare_t	Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References pwm_compare_opt_t::compare_mode, pwm_compare_opt_t::compare_period_counter_value, pwm_compare_opt_t::compare_pwm_counter_value, pwm_compare_opt_t::compare_pwm_period_counter_value, pwm_compare_opt_t::compare_pwm_update_period, pwm_compare_opt_t::compare_status, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_compare_match_setup	(	int	line,
		pwm_compare_opt_t *	pwm_compare_t
	)

Compare Match Setup.

Parameters

line	Compare Line to be used
pwm_compare_t	Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References pwm_compare_opt_t::compare_mode, pwm_compare_opt_t::compare_period_counter_value, pwm_compare_opt_t::compare_pwm_counter_value, pwm_compare_opt_t::compare_pwm_period_counter_value, pwm_compare_opt_t::compare_pwm_update_period, pwm_compare_opt_t::compare_status, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_compare_reload_update_period_value	(	int	line,
		pwm_compare_opt_t *	pwm_compare_t
	)

Compare Reload Update Period.

Parameters

line	Compare Line to be used
pwm_compare_t	Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

int pwm_compare_update_period_value	(	int	line,
		pwm_compare_opt_t *	pwm_compare_t
	)

Fault Lines Enable function.

Parameters

line	Compare Line to be used
pwm_compare_t	Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

int pwm_fault_lines_enable	(	U8	line,
		U8	channel
	)

Fault Lines Enable function.

Parameters

line	Line
channel	Channel

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_fault_lines_level_setup	(	U8	line,
		U8	channel_high,
		U8	channel_low
	)

Fault Lines Level Setup Function.

Parameters

line	Line
channel_high	Channel High
channel_low	Channel Low

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_fault_lines_polarity_setup	(	U8	line,
		U8	polarity,
		U8	mode,
		U8	filter
	)

Fault Lines Level Polarity Function.

Parameters

line	Line
polarity	Polarity
mode	Mode
filter	Filter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_get_fault_status

(

void

)

Get Fault Status.

Returns

Value of FSR register

unsigned int pwm_get_update_period_counter_value

(

void

)

Return Current Counter of Update Period Value.

Returns

Value of Counter

int pwm_init

(

pwm_opt_t *

opt

)

This function initialize the PWM controller (mode register) and disable the interrupt.

Parameters

opt	PWM Channel structure parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, pwm_opt_t::cksel, Disable_global_interrupt, pwm_opt_t::diva, pwm_opt_t::divb, Enable_global_interrupt, pwm_opt_t::fault_detection_activated, i, Is_global_interrupt_enabled, pwm_opt_t::prea, pwm_opt_t::preb, PWM_INVALID_INPUT, PWM_OOV_LINES, PWM_SUCCESS, PWM_SYNC_UPDATE_AUTO_WRITE_AUTO_UPDATE, pwm_write_protect_sw_unlock(), pwm_opt_t::sync_channel_activated, pwm_opt_t::sync_channel_select, and pwm_opt_t::sync_update_channel_mode.

Referenced by main(), and tft_bl_init().

int pwm_interrupt_update_channel	(	unsigned int	channel_id,
		const avr32_pwm_channel_t *	pwm_channel
	)

Update channel register CPRDx or CDTYx with the interrupt method. This function uses the CUPDx register as a double buffer for the period or the duty cycle. Only the first 20 bits of cupd are significant.

Parameters

channel_id	The channel identifier (0 to max channel-1)
*pwm_channel	Pointer to PWM channel struct avr32_pwm_channel_t

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_output_override_setup

(

pwm_output_override_opt_t *

opt

)

Output Override Configuration. This function uses the OS and OOV registers.

Parameters

opt	Output Override Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References i, pwm_output_override_opt_t::oov, PWM_INVALID_INPUT, PWM_OOV_LINES, and PWM_SUCCESS.

int pwm_output_override_write

(

pwm_output_override_opt_t *

opt

)

Output Override Set. This function uses the OS and OOV registers.

Parameters

opt	Output Override Parameter

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References i, pwm_output_override_opt_t::os, PWM_INVALID_INPUT, PWM_OOV_LINES, PWM_SUCCESS, and tmp.

int pwm_start_channels

(

unsigned long

channels_bitmask

)

Start PWM channels.

Parameters

channels_bitmask

A bit-mask with set bits indicating channels to start.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, PWM_INVALID_INPUT, and PWM_SUCCESS.

Referenced by main(), and tft_bl_init().

int pwm_stop_channels

(

unsigned long

channels_bitmask

)

Stop PWM channels.

Parameters

channels_bitmask

A bit-mask with set bits indicating channels to stop.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_synchronous_prepare_update	(	unsigned int	channel_id,
		const avr32_pwm_channel_t *	pwm_channel
	)

Prepare a Synchronous Channel, User should call this function for all the synchronous channel.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_update_auto_write_auto_update_check_eot

(

void

)

Synchronous Update with Manual Write and Auto Update Method.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_SUCCESS.

int pwm_update_auto_write_auto_update_check_ready

(

void

)

Synchronous Update with Manual Write and Auto Update Method.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_SUCCESS.

int pwm_update_channel	(	unsigned int	channel_id,
		const avr32_pwm_channel_t *	pwm_channel
	)

Update channel register CPRDx or CDTYx with the polling method. This function uses the CUPDx register as a double buffer for the period or the duty cycle. Only the first 20 bits of cupd are significant.

Parameters

channel_id	The channel identifier (0 to max channel-1)
*pwm_channel	Pointer to PWM channel struct avr32_pwm_channel_t

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References AVR32_PWM_LINES_MSB, PWM_INVALID_INPUT, and PWM_SUCCESS.

int pwm_update_manual_write_auto_update

(

void

)

Synchronous Update with Manual Write and Auto Update Method.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_SUCCESS.

int pwm_update_manual_write_manual_update

(

void

)

Synchronous Update with Manual Write and Manual Update Method.

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_SUCCESS.

int pwm_update_period_value

(

unsigned int

value

)

Define Update Period Value For Update Of Synchronous Channel.

Parameters

value

Update Period Value

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_SUCCESS.

Referenced by main().

int pwm_update_period_value_update

(

unsigned int

value

)

Define Update Period Value For Update Of Synchronous Channel after a first init.

Parameters

value

Update Period Value

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

int pwm_write_protect_hw_lock

(

int

group

)

Hardware Write Protect Lock Function. This function uses the WPMR register.

Parameters

group

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_FAILURE, and PWM_SUCCESS.

U32 pwm_write_protect_status

(

void

)

Write Protect Status Function. This function uses the WPSR register.

Returns

PWM_NO_WRITE_PROTECT_VIOLATION or Write Protection Violation Source

References PWM_NO_WRITE_PROTECT_VIOLATION, and status.

int pwm_write_protect_sw_lock

(

int

group

)

Software Write Protect Lock Function. This function uses the WPMR register.

Parameters

group

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_FAILURE, and PWM_SUCCESS.

int pwm_write_protect_sw_unlock

(

int

group

)

Software Write Protect Unlock Function. This function uses the WPMR register.

Parameters

group

Returns

PWM_SUCCESS or PWM_INVALID_INPUT

References PWM_FAILURE, and PWM_SUCCESS.

Referenced by pwm_init().