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