sensors_data_device_t Struct Reference

Data Fields
struct hw_device_t	common
int(*	data_close )(struct sensors_data_device_t *dev)
	Caller has completed using the sensor data.
int(*	data_open )(struct sensors_data_device_t *dev, native_handle_t *nh)
	Prepare to read sensor data.
int(*	poll )(struct sensors_data_device_t *dev, sensors_data_t *data)
	Return sensor data for one of the enabled sensors.

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Detailed Description

Definition at line 314 of file sensors.h.

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Field Documentation

struct hw_device_t sensors_data_device_t::common [read]

Definition at line 315 of file sensors.h.

int(* sensors_data_device_t::data_close)(struct sensors_data_device_t *dev)

Caller has completed using the sensor data.

The caller will not be blocked in sensors_data_poll when this routine is called.

Returns:

0 if successful, < 0 on error

int(* sensors_data_device_t::data_open)(struct sensors_data_device_t *dev, native_handle_t *nh)

Prepare to read sensor data.

This routine does NOT take ownership of the handle and must not close it. Typically this routine would use a duplicate of the nh parameter.

Parameters:

nh

from sensors_control_open.

Returns:

0 if successful, < 0 on error

int(* sensors_data_device_t::poll)(struct sensors_data_device_t *dev, sensors_data_t *data)

Return sensor data for one of the enabled sensors.

Returns:

sensor handle for the returned data, 0x7FFFFFFF when sensors_control_device_t.wake() is called and -errno on error