92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/****************************************************************************
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* include/nuttx/sensors/ltr308.h
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* Character driver for the LTR-308ALS-01 Lite-On ambient light sensor.
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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_LTR308_H
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#define __INCLUDE_NUTTX_SENSORS_LTR308_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 <nuttx/sensors/ioctl.h>
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/* Configuration ************************************************************
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* Prerequisites:
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*
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* CONFIG_I2C
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* Enables support for I2C drivers
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* CONFIG_SENSORS_LTR308
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* Enables support for the LTR308 driver
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*/
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#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_LTR308)
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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 ltr308_calibval
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{
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uint8_t integration_time;
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uint8_t measurement_rate;
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uint8_t gain;
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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: ltr308_register
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*
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* Description:
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* Register the LTR308 character device as 'devpath'.
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*
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* Input Parameters:
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* devno - Number of device (i.e. ltr0, ltr1, ...)
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* i2c - An I2C driver instance.
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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 ltr308_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_LTR308 */
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#endif /* __INCLUDE_NUTTX_SENSORS_LTR308_H */
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