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driver.h
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/****************************************************************************
* drivers/sensors/bme280/driver.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_SENSORS_BME280_H
#define __INCLUDE_NUTTX_SENSORS_BME280_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#if defined(CONFIG_I2C) && (defined(CONFIG_SENSORS_BME280) || defined(CONFIG_SENSORS_BME280_SCU))
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Prerequisites:
*
* CONFIG_BME280
* Enables support for the BME280 driver
*/
/****************************************************************************
* Public Types
****************************************************************************/
struct i2c_master_s;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* IOCTL Commands ***********************************************************/
/* Standby duration */
#define BME280_STANDBY_05_MS (0x00) /* 0.5 ms */
#define BME280_STANDBY_63_MS (0x01) /* 62.5 ms */
#define BME280_STANDBY_125_MS (0x02) /* 125 ms */
#define BME280_STANDBY_250_MS (0x03) /* 250 ms */
#define BME280_STANDBY_500_MS (0x04) /* 500 ms */
#define BME280_STANDBY_1000_MS (0x05) /* 1000 ms */
#define BME280_STANDBY_2000_MS (0x06) /* 2000 ms */
#define BME280_STANDBY_4000_MS (0x07) /* 4000 ms */
#ifdef CONFIG_SENSORS_BME280_SCU
/****************************************************************************
* Name: bme280_init
*
* Description:
* Initialize BME280 pressure device
*
* Input Parameters:
* i2c - An instance of the I2C interface to use to communicate with
* BME280
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int bme280_init(FAR struct i2c_master_s *i2c, int port);
#endif
/****************************************************************************
* Name: bme280_register
*
* Description:
* Register the BME280 character device
*
* Input Parameters:
* devno - Instance number for driver
* i2c - An instance of the I2C interface to use to communicate with
* BME280
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_SENSORS_BME280_SCU
int bme280press_register(FAR const char *devpath, int minor,
FAR struct i2c_master_s *i2c, int port);
int bme280temp_register(FAR const char *devpath, int minor,
FAR struct i2c_master_s *i2c, int port);
#else
int bme280_register(int devno, FAR struct i2c_master_s *i2c);
#endif
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_I2C && (CONFIG_SENSORS_BME280 || CONFIG_SENSORS_BME280_SCU) */
#endif /* __INCLUDE_NUTTX_SENSORS_BME280_H */