forked from Imagelibrary/rtems
120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/**
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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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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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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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