forked from Imagelibrary/rtems
129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2016-2017 Chris Johns <chrisj@rtems.org>
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* 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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/*
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* TI TMP112
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* http://www.ti.com/product/TMP112
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*/
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#ifndef TI_TMP112_H
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#define TI_TMP112_H
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#include <dev/i2c/i2c.h>
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/*
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* Confirguration.
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*/
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#define TI_TMP112_CR_0_25Hz (0 << 6)
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#define TI_TMP112_CR_1Hz (1 << 6)
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#define TI_TMP112_CR_4Hz (2 << 6) /* default */
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#define TI_TMP112_CR_8Hz (3 << 6)
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#define TI_TMP112_EM_NORMAL (0 << 4) /* default */
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#define TI_TMP112_EM_EXTENDED (1 << 4)
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#define TI_TMP112_SD_ON (0 << 8) /* default */
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#define TI_TMP112_SD_SHUTDOWN (1 << 8)
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#define TI_TMP112_TM_COMPARATOR (0 << 9) /* default */
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#define TI_TMP112_TM_INTERRUPT (1 << 9)
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#define TI_TMP112_POL_ALERT_LOW (0 << 10) /* default */
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#define TI_TMP112_POL_ALERT_HIGH (1 << 10)
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#define TI_TMP112_FQL_1 (0 << 11) /* default */
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#define TI_TMP112_FQL_2 (1 << 11)
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#define TI_TMP112_FQL_4 (2 << 11)
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#define TI_TMP112_FQL_6 (3 << 11)
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/*
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* IO control interface.
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*/
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#define TI_TMP112_GET_TEMP (I2C_DEV_IO_CONTROL + 0)
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#define TI_TMP112_GET_TEMP_RAW (I2C_DEV_IO_CONTROL + 1)
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#define TI_TMP112_SET_CONFIG (I2C_DEV_IO_CONTROL + 2)
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#define TI_TMP112_SET_LOW_TEMP (I2C_DEV_IO_CONTROL + 3)
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#define TI_TMP112_SET_HIGH_TEMP (I2C_DEV_IO_CONTROL + 4)
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/*
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* Register the device.
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*/
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int i2c_dev_register_ti_tmp112(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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* Get the temperature in degrees C x 10000. To print you would so:
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*
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* printf("Temperature is %3d.%04d\n", temp / 10000, temp % 10000);
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*
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* If the device is shutdown a single conversion is made waiting for the
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* conversion to complete.
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*/
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static inline int
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ti_tmp112_get_temperature(int fd, int* temp)
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{
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return ioctl(fd, TI_TMP112_GET_TEMP, temp);
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}
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/*
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* Get the temperature as the raw register value.
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*
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* If the device is shutdown a single conversion is made waiting for the
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* conversion to complete.
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*/
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static inline int
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ti_tmp112_get_temperature_raw(int fd, unsigned int* temp)
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{
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return ioctl(fd, TI_TMP112_GET_TEMP_RAW, temp);
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}
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/*
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* Set the configuration.
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*/
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static inline int
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ti_tmp112_adc_set_config(int fd, uint16_t config)
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{
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return ioctl(fd, TI_TMP112_SET_CONFIG, (void *)(uintptr_t) config);
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}
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/*
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* Set the low temperature.
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*/
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static inline int
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ti_tmp112_set_low_temperator(int fd, uint16_t temp)
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{
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return ioctl(fd, TI_TMP112_SET_LOW_TEMP, (void *)(uintptr_t) temp);
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}
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/*
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* Set the high temperature.
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*/
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static inline int
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ti_tmp112_adc_set_high_threshold(int fd, uint16_t level)
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{
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return ioctl(fd, TI_TMP112_SET_HIGH_TEMP, (void *)(uintptr_t) level);
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}
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#endif
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