137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/****************************************************************************
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* include/nuttx/sensors/bme680.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_BME680_H
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#define __INCLUDE_NUTTX_SENSORS_BME680_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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#include <stdint.h>
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#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_BME680)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Oversampling settings */
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#define BME680_OS_SKIPPED (0x00) /* Output set to 0x8000 */
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#define BME680_OS_1X (0x01)
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#define BME680_OS_2X (0x02)
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#define BME680_OS_4X (0x03)
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#define BME680_OS_8X (0x04)
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#define BME680_OS_16X (0x05)
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/* IIR filter settings */
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#define BME680_FILTER_COEF0 (0)
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#define BME680_FILTER_COEF1 (1)
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#define BME680_FILTER_COEF3 (2)
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#define BME680_FILTER_COEF7 (3)
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#define BME680_FILTER_COEF15 (4)
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#define BME680_FILTER_COEF31 (5)
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#define BME680_FILTER_COEF63 (6)
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#define BME680_FILTER_COEF127 (7)
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/* Prerequisites:
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*
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* CONFIG_BME680
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* Enables support for the BME680 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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struct bme680_config_s
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{
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/* Oversampling settings */
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uint8_t temp_os;
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#ifndef CONFIG_BME680_DISABLE_PRESS_MEAS
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uint8_t press_os;
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#endif
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#ifndef CONFIG_BME680_DISABLE_HUM_MEAS
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uint8_t hum_os;
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#endif
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#ifdef CONFIG_BME680_ENABLE_IIR_FILTER
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/* Filter coefficient */
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uint8_t filter_coef;
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#endif
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#ifndef CONFIG_BME680_DISABLE_GAS_MEAS
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/* Gas settings */
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int16_t target_temp; /* degrees Celsius */
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uint16_t heater_duration; /* ms */
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uint8_t nb_conv;
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int16_t amb_temp; /* degrees Celsius */
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#endif
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};
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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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/****************************************************************************
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* Name: bme680_register
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*
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* Description:
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* Register the BME680 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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* BME680
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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 bme680_register(int devno, FAR struct i2c_master_s *i2c);
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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_BME680 */
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#endif /* __INCLUDE_NUTTX_BME680_H */
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