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100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
// Copyright 2010-2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stdint.h>
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#include "esp_err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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TSENS_DAC_L0 = 0, /*!< offset = -2, measure range: 50℃ ~ 125℃, error < 3℃. */
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TSENS_DAC_L1, /*!< offset = -1, measure range: 20℃ ~ 100℃, error < 2℃. */
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TSENS_DAC_L2, /*!< offset = 0, measure range:-10℃ ~ 80℃, error < 1℃. */
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TSENS_DAC_L3, /*!< offset = 1, measure range:-30℃ ~ 50℃, error < 2℃. */
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TSENS_DAC_L4, /*!< offset = 2, measure range:-40℃ ~ 20℃, error < 3℃. */
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TSENS_DAC_MAX,
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TSENS_DAC_DEFAULT = TSENS_DAC_L2,
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} temp_sensor_dac_offset_t;
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/**
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* @brief Configuration for temperature sensor reading
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*/
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typedef struct {
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temp_sensor_dac_offset_t dac_offset; /*!< The temperature measurement range is configured with a built-in temperature offset DAC. */
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uint8_t clk_div; /*!< Default: 6 */
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} temp_sensor_config_t;
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#define TSENS_CONFIG_DEFAULT() {.dac_offset = TSENS_DAC_L2, \
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.clk_div = 6}
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/**
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* @brief Set parameter of temperature sensor.
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* @param tsens
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* @return
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* - ESP_OK Success
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*/
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esp_err_t temp_sensor_set_config(temp_sensor_config_t tsens);
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/**
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* @brief Get parameter of temperature sensor.
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* @param tsens
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* @return
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* - ESP_OK Success
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*/
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esp_err_t temp_sensor_get_config(temp_sensor_config_t *tsens);
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/**
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* @brief Start temperature sensor measure.
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG
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*/
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esp_err_t temp_sensor_start(void);
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/**
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* @brief Stop temperature sensor measure.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t temp_sensor_stop(void);
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/**
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* @brief Read temperature sensor raw data.
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* @param tsens_out Pointer to raw data, Range: 0 ~ 255
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG `tsens_out` is NULL
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* - ESP_ERR_INVALID_STATE temperature sensor dont start
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*/
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esp_err_t temp_sensor_read_raw(uint32_t *tsens_out);
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/**
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* @brief Read temperature sensor data that is converted to degrees Celsius.
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* @note Should not be called from interrupt.
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* @param celsius The measure output value.
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG ARG is NULL.
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* - ESP_ERR_INVALID_STATE The ambient temperature is out of range.
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*/
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esp_err_t temp_sensor_read_celsius(float *celsius);
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#ifdef __cplusplus
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}
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#endif
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