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69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/*
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* Copyright (C) 2020 Bas Stottelaar <basstottelaar@gmail.com>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup cpu_efm32_drivers_coretemp EFM32 internal temperature sensor
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* @ingroup cpu_efm32_drivers
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* @ingroup drivers_saul
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* @brief Driver for the EFM32 internal temperature sensor
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*
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* All EFM32 chips have an internal ADC input channel that reads the internal
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* temperature sensor. This EFM32-specific driver provides an interface for
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* reading this value, compensated using factory-calibrated values.
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*
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* The board must define `CORETEMP_ADC` to point to the ADC line that connects
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* to the right ADC input channel.
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*
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* This driver provides @ref drivers_saul capabilities.
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*
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* @{
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*
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* @file
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* @brief Interface definition of the EFM32 internal temperature sensor
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* driver.
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*
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* @author Bas Stottelaar <basstottelaar@gmail.com>
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*/
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#ifndef DRIVERS_CORETEMP_H
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#define DRIVERS_CORETEMP_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Initialize the sensor.
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*
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* @return 0 on successful initialization
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* @return -EIO on ADC initialization error
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*
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* This driver assumes that the `CORETEMP_ADC` is defined and points to the ADC
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* input channel that is connected to the internal temperature sensor.
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*/
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int coretemp_init(void);
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/**
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* @brief Read the current temperature from the sensor.
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*
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* @return current temperature in centi-degrees Celsius
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* (times 100)
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*
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* Temperature readings are compensated using the factory-calibration values.
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*/
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int16_t coretemp_read(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* DRIVERS_CORETEMP_H */
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/** @} */
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