es9257.h File Reference

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API Description

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Data Structures
struct	_es9257_context

Functions
es9257_context	es9257_init (int32_t pin, int32_t min_pulse_width, int32_t max_pulse_width)
void	es9257_halt (es9257_context dev)
upm_result_t	es9257_set_angle (es9257_context dev, int32_t angle)
upm_result_t	es9257_calc_pulse_travelling (const es9257_context dev, int32_t *ret_val, int32_t value)
void	es9257_set_min_pulse_width (es9257_context dev, int width)
void	es9257_set_max_pulse_width (es9257_context dev, int width)
int	es9257_get_min_pulse_width (es9257_context dev)
int	es9257_get_max_pulse_width (es9257_context dev)

Macros
#define	ES9257_MIN_PULSE_WIDTH   600
#define	ES9257_MAX_PULSE_WIDTH   2200
#define	ES9257_PERIOD   20000
#define	ES9257_MAX_ANGLE   180.0

Typedefs
typedef struct _es9257_context *	es9257_context

Function Documentation

es9257_context es9257_init	(	int32_t	pin,
		int32_t	min_pulse_width,
		int32_t	max_pulse_width
	)

Instantiates a the servo at the given pin

Parameters

pin	Servo pin number
minPulseWidth	Minimum pulse width, in microseconds
maxPulseWidth	Maximum pulse width, in microseconds
waitAndDisablePwm	If 1, PWM is enabled only during the setAngle() execution for a period of 1 second, and then turned back off. If 0, PWM remains on afterward.

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void es9257_halt

(

es9257_context

dev

)

Halts PWM for this servo and allows it to move freely.

upm_result_t es9257_set_angle	(	es9257_context	dev,
		int32_t	angle
	)

Sets the angle of the servo engine.

Parameters

angle

Number between 0 and 180

Returns

0 if successful, non-zero otherwise

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void es9257_set_min_pulse_width	(	es9257_context	dev,
		int	width
	)

Sets the minimum pulse width

Parameters

width

Minimum HIGH signal width

void es9257_set_max_pulse_width	(	es9257_context	dev,
		int	width
	)

Sets the maximum pulse width

Parameters

width

Maximum HIGH signal width

int es9257_get_min_pulse_width

(

es9257_context

dev

)

Returns the minimum pulse width

Returns

Minimum pulse width

int es9257_get_max_pulse_width

(

es9257_context

dev

)

Returns the maximum pulse width

Returns

Maximum pulse width