forked from Imagelibrary/rtems
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @brief Temperature Sensor LM75A Driver API
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*
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* @ingroup I2CSensorLM75A
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*/
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/*
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* Copyright (c) 2017 embedded brains GmbH. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_I2C_SENSOR_LM75A_H
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#define _DEV_I2C_SENSOR_LM75A_H
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#include <dev/i2c/i2c.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* @defgroup I2CSensorLM75A Temperature Sensor LM75A Driver
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*
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* @ingroup I2CDevice
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*
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* @brief Driver for NXP or Texas Instruments LM75A temperature sensor.
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*
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* @{
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*/
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int i2c_dev_register_sensor_lm75a(
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const char *bus_path,
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const char *dev_path,
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uint16_t address
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);
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typedef enum {
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SENSOR_LM75A_GET_CONF = I2C_DEV_IO_CONTROL,
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SENSOR_LM75A_SET_CONF,
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SENSOR_LM75A_CLEAR_AND_SET_CONF,
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SENSOR_LM75A_GET_TEMP,
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SENSOR_LM75A_GET_TOS,
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SENSOR_LM75A_SET_TOS,
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SENSOR_LM75A_GET_THYST,
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SENSOR_LM75A_SET_THYST
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} sensor_lm75a_command;
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static inline int sensor_lm75a_get_conf(int fd, uint8_t *val)
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{
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return ioctl(fd, SENSOR_LM75A_GET_CONF, val);
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}
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static inline int sensor_lm75a_set_conf(int fd, uint8_t val)
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{
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return ioctl(fd, SENSOR_LM75A_SET_CONF, (void *)(uintptr_t) val);
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}
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static inline int sensor_lm75a_clear_and_set_conf(
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int fd,
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uint8_t clear,
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uint8_t set
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)
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{
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uint16_t clear_and_set = (uint16_t) (((uint16_t) set << 8) | clear);
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return ioctl(
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fd,
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SENSOR_LM75A_CLEAR_AND_SET_CONF,
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(void *)(uintptr_t) clear_and_set
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);
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}
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static inline int sensor_lm75a_get_temp(int fd, int16_t *val)
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{
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return ioctl(fd, SENSOR_LM75A_GET_TEMP, val);
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}
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static inline int sensor_lm75a_get_temp_celsius(int fd, double *celsius)
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{
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int rv;
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int16_t val;
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rv = ioctl(fd, SENSOR_LM75A_GET_TEMP, &val);
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*celsius = (((int) val) >> 5) * 0.125;
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return rv;
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}
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static inline int sensor_lm75a_get_tos(int fd, uint16_t *val)
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{
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return ioctl(fd, SENSOR_LM75A_GET_TOS, val);
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}
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static inline int sensor_lm75a_set_tos(int fd, uint16_t val)
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{
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return ioctl(fd, SENSOR_LM75A_SET_TOS, (void *)(uintptr_t) val);
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}
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static inline int sensor_lm75a_get_thyst(int fd, uint16_t *val)
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{
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return ioctl(fd, SENSOR_LM75A_GET_THYST, val);
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}
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static inline int sensor_lm75a_set_thyst(int fd, uint16_t val)
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{
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return ioctl(fd, SENSOR_LM75A_SET_THYST, (void *)(uintptr_t) val);
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}
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/** @} */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _DEV_I2C_SENSOR_LM75A_H */
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