189 lines
5.7 KiB
C
189 lines
5.7 KiB
C
/****************************************************************************
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* include/nuttx/sensors/bmp280.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_SENSORS_BMP280_H
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#define __INCLUDE_NUTTX_SENSORS_BMP280_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#if defined(CONFIG_I2C) && (defined(CONFIG_SENSORS_BMP280) || defined(CONFIG_SENSORS_BMP280_SCU))
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Prerequisites:
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*
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* CONFIG_BMP280
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* Enables support for the BMP280 driver
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*/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct i2c_master_s;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* IOCTL Commands ***********************************************************/
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/* Arg: 0: Disable compensated
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* 1: Enable compensated
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*/
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#define ENABLE_COMPENSATED (1)
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#define DISABLE_COMPENSATED (0)
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/* Standby duration */
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#define BMP280_STANDBY_05_MS (0x00) /* 0.5 ms */
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#define BMP280_STANDBY_63_MS (0x01) /* 62.5 ms */
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#define BMP280_STANDBY_125_MS (0x02) /* 125 ms */
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#define BMP280_STANDBY_250_MS (0x03) /* 250 ms */
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#define BMP280_STANDBY_500_MS (0x04) /* 500 ms */
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#define BMP280_STANDBY_1000_MS (0x05) /* 1000 ms */
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#define BMP280_STANDBY_2000_MS (0x06) /* 2000 ms */
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#define BMP280_STANDBY_4000_MS (0x07) /* 4000 ms */
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/* Enable compensate of sensing values (no SCU bus only)
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*
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* Arg: ENABLE_COMPENSATED or DISABLE_COMPENSATED
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*/
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#define SNIOC_ENABLE_COMPENSATED _SNIOC(0x0001)
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/* Get sensor predefined adjustment values (SCU bus only)
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*
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* Arg: Pointer of struct bmp280_press_adj_s (pressure)
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* Pointer of struct bmp280_temp_adj_s (temperature)
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*/
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#define SNIOC_GETADJ _SNIOC(0x0002)
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/* Set sensor standby duration
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*
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* Arg: BMP280_STANDBY_*_MS
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*/
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#define SNIOC_SETSTB _SNIOC(0x0003)
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/* Get temperature value
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*
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* Arg: Pointer to uint32_t (raw value)
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*/
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#define SNIOC_GET_TEMP _SNIOC(0x0004)
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struct bmp280_press_adj_s
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{
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uint16_t dig_p1; /* calibration P1 data */
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int16_t dig_p2; /* calibration P2 data */
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int16_t dig_p3; /* calibration P3 data */
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int16_t dig_p4; /* calibration P4 data */
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int16_t dig_p5; /* calibration P5 data */
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int16_t dig_p6; /* calibration P6 data */
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int16_t dig_p7; /* calibration P7 data */
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int16_t dig_p8; /* calibration P8 data */
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int16_t dig_p9; /* calibration P9 data */
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};
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struct bmp280_temp_adj_s
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{
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uint16_t dig_t1; /* calibration T1 data */
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int16_t dig_t2; /* calibration T2 data */
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int16_t dig_t3; /* calibration T3 data */
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};
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struct bmp280_meas_s
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{
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uint8_t msb; /* meas value MSB */
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uint8_t lsb; /* meas value LSB */
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uint8_t xlsb; /* meas value XLSB */
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};
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#ifdef CONFIG_SENSORS_BMP280_SCU
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/****************************************************************************
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* Name: bmp280_init
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*
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* Description:
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* Initialize BMP280 pressure device
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*
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* Input Parameters:
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* i2c - An instance of the I2C interface to use to communicate with
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* BMP280
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int bmp280_init(FAR struct i2c_master_s *i2c, int port);
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#endif
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/****************************************************************************
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* Name: bmp280_register
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*
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* Description:
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* Register the BMP280 character device
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*
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* Input Parameters:
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* devno - Instance number for driver
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* i2c - An instance of the I2C interface to use to communicate with
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* BMP280
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_SENSORS_BMP280_SCU
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int bmp280press_register(FAR const char *devpath, int minor,
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FAR struct i2c_master_s *i2c, int port);
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int bmp280temp_register(FAR const char *devpath, int minor,
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FAR struct i2c_master_s *i2c, int port);
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#else
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int bmp280_register(int devno, FAR struct i2c_master_s *i2c);
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_I2C && CONFIG_SENSORS_BMP280 */
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#endif /* __INCLUDE_NUTTX_BMP280_H */
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