pwm_sysfs.h File Reference

PWM servos handling using Linux sysfs. More...

#include "std.h"

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Data Structures
struct	PWM_Sysfs
	PWM structure. More...

Macros
#define	PWM_SYSFS_PATH_LEN   64

Functions
int	pwm_sysfs_init (struct PWM_Sysfs *pwm, char *base_path, char *_export, char *_enable, char *_duty, char *_period, uint8_t channel)
void	pwm_sysfs_set_period (struct PWM_Sysfs *pwm, uint32_t period)
void	pwm_sysfs_set_duty (struct PWM_Sysfs *pwm, uint32_t duty)
void	pwm_sysfs_enable (struct PWM_Sysfs *pwm, bool enable)

Detailed Description

PWM servos handling using Linux sysfs.

Based on PWM_Sysfs driver from ardupilot released under GPL v3

Definition in file pwm_sysfs.h.

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Data Structure Documentation

PWM_Sysfs

struct PWM_Sysfs

PWM structure.

Definition at line 36 of file pwm_sysfs.h.

Data Fields
int	duty_cycle_fd	file descriptor to write/update duty cycle
uint32_t	duty_cycle_nsec	current duty cycle (in nsec)
char	duty_path[PWM_SYSFS_PATH_LEN]	path to duty file
char	enable_path[PWM_SYSFS_PATH_LEN]	path to enable file
bool	enabled	true if pwm is enabled
uint32_t	period_nsec	current period (in nsec)
char	period_path[PWM_SYSFS_PATH_LEN]	path to period file

Macro Definition Documentation

PWM_SYSFS_PATH_LEN

#define PWM_SYSFS_PATH_LEN   64

Definition at line 32 of file pwm_sysfs.h.

Function Documentation

pwm_sysfs_enable()

void pwm_sysfs_enable	(	struct PWM_Sysfs *	pwm,
		bool	enable
	)

Definition at line 114 of file pwm_sysfs.c.

References PWM_Sysfs::enable_path, PWM_Sysfs::enabled, PS_DEBUG_PRINT, and write_file().

Referenced by pwm_sysfs_set_duty().

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pwm_sysfs_init()

int pwm_sysfs_init	(	struct PWM_Sysfs *	pwm,
		char *	base_path,
		char *	_export,
		char *	_enable,
		char *	_duty,
		char *	_period,
		uint8_t	channel
	)

Definition at line 52 of file pwm_sysfs.c.

References PS_DEBUG_PRINT, PWM_SYSFS_DEFAULT_PERIOD, PWM_SYSFS_PATH_LEN, pwm_sysfs_set_period(), and write_file().

Referenced by actuators_disco_init().

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pwm_sysfs_set_duty()

void pwm_sysfs_set_duty	(	struct PWM_Sysfs *	pwm,
		uint32_t	duty
	)

Definition at line 101 of file pwm_sysfs.c.

References PWM_Sysfs::duty_cycle_fd, PWM_Sysfs::duty_cycle_nsec, PWM_Sysfs::duty_path, PWM_Sysfs::enabled, PS_DEBUG_PRINT, and pwm_sysfs_enable().

Referenced by actuators_disco_set().

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pwm_sysfs_set_period()

void pwm_sysfs_set_period	(	struct PWM_Sysfs *	pwm,
		uint32_t	period
	)

Definition at line 91 of file pwm_sysfs.c.

References PWM_Sysfs::period_nsec, PWM_Sysfs::period_path, PS_DEBUG_PRINT, and write_file().

Referenced by pwm_sysfs_init().

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