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83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "hal/temperature_sensor_hal.h"
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#include "hal/temperature_sensor_ll.h"
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#include "soc/temperature_sensor_periph.h"
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#include "hal/log.h"
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#include "esp_rom_sys.h"
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__attribute__((unused)) static const char *TAG_TSENS = "temperature_sensor_hal";
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#define INT_NOT_USED 999999
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// HAL layer maintains its own copies of these variables to avoid changing existing logic
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static int s_hal_record_min = INT_NOT_USED;
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static int s_hal_record_max = INT_NOT_USED;
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static uint8_t s_hal_tsens_idx = 2; // Index for temperature attribute, set 2(middle) as default value
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int temperature_sensor_hal_get_raw_value(void)
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{
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int raw_value = temperature_sensor_ll_get_raw_value();
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return (TEMPERATURE_SENSOR_LL_ADC_FACTOR_INT * raw_value - TEMPERATURE_SENSOR_LL_DAC_FACTOR_INT * temperature_sensor_attributes[s_hal_tsens_idx].offset - TEMPERATURE_SENSOR_LL_OFFSET_FACTOR_INT) / TEMPERATURE_SENSOR_LL_DENOMINATOR;
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}
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int16_t temperature_sensor_hal_get_degree(bool *range_changed)
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{
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int degree = temperature_sensor_hal_get_raw_value();
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uint8_t temperature_dac;
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// 1. Check whether temperature value is in range
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if (s_hal_record_min != INT_NOT_USED && degree >= s_hal_record_min && degree <= s_hal_record_max) {
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// If degree is in range, not needed to do any check to save time. Otherwise, choose proper range and record.
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if (range_changed != NULL) {
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*range_changed = false;
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}
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return degree;
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}
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// 2. If temperature value is not in range, adjust to proper range
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if (degree >= temperature_sensor_attributes[1].range_max) {
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s_hal_tsens_idx = 0;
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} else if (degree >= temperature_sensor_attributes[2].range_max && degree < temperature_sensor_attributes[1].range_max) {
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s_hal_tsens_idx = 1;
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} else if (degree <= temperature_sensor_attributes[2].range_min && degree > temperature_sensor_attributes[3].range_min) {
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s_hal_tsens_idx = 3;
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} else if (degree <= temperature_sensor_attributes[3].range_min) {
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s_hal_tsens_idx = 4;
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} else {
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s_hal_tsens_idx = 2;
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}
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HAL_EARLY_LOGD(TAG_TSENS, "range changed, change to index %d", s_hal_tsens_idx);
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temperature_dac = temperature_sensor_attributes[s_hal_tsens_idx].reg_val;
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s_hal_record_min = temperature_sensor_attributes[s_hal_tsens_idx].range_min;
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s_hal_record_max = temperature_sensor_attributes[s_hal_tsens_idx].range_max;
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temperature_sensor_ll_set_range(temperature_dac);
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// 3. Then, read value again
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// Before reading the temperature value, ticks need to be delayed, otherwise a wrong value will be returned.
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// As what has been recommended and tested, 300us is a good interval to get the correct value after adjust range.
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esp_rom_delay_us(300);
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degree = temperature_sensor_hal_get_raw_value();
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if (range_changed != NULL) {
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*range_changed = true;
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}
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return degree;
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}
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void temperature_sensor_hal_init(void)
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{
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// Set the range as recorded.
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temperature_sensor_ll_set_range(temperature_sensor_attributes[s_hal_tsens_idx].reg_val);
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}
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void temperature_sensor_hal_sync_tsens_idx(uint8_t tsens_idx)
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{
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s_hal_tsens_idx = tsens_idx;
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}
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