Device driver for the srf04 ultra sonic range finder. More...

Detailed Description

Device driver for the srf04 ultra sonic range finder.

Author: Semjon Kerner semjo.nosp@m.n.ke.nosp@m.rner@.nosp@m.fu-b.nosp@m.erlin.nosp@m..de

Definition in file srf04.h.

#include <stdint.h>
#include <stdio.h>
#include "periph/gpio.h"
#include "xtimer.h"

Include dependency graph for srf04.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	srf04_params_t
	GPIO pins for srf04 device. More...

struct	srf04_t
	Device descriptor for srf04 sensor. More...

Enumerations
enum	{ SRF04_OK = 0 , SRF04_ERR_INVALID = -1 , SRF04_ERR_MEASURING = -2 , SRF04_ERR_GPIO = -3 }
	Status and error return codes. More...

Functions
int	srf04_init (srf04_t dev, const srf04_params_t params)
	Initialize gpio and interrupt.

void	srf04_trigger (const srf04_t *dev)
	Triggers measurement.

int	srf04_read (const srf04_t *dev)
	Returns time of flight in ms.

int	srf04_get_distance (const srf04_t *dev)
	Convenience function triggers a measurement and returns distance.

Data Structures