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