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fix(temperature_sensor): Fix temperature sensor value accurency in high range variation

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This commit is contained in:
C.S.M
2025-06-16 16:27:30 +08:00
parent d2b6f832f5
commit d6a3e73f46
2 changed files with 33 additions and 1 deletions
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13
components/esp_driver_tsens/src/temperature_sensor.c
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@@ -65,9 +65,18 @@ static esp_err_t temperature_sensor_choose_best_range(temperature_sensor_handle_
for (int i = 0 ; i < TEMPERATURE_SENSOR_ATTR_RANGE_NUM; i++) {
if ((tsens_config->range_min >= s_tsens_attribute_copy[i].range_min) && (tsens_config->range_max <= s_tsens_attribute_copy[i].range_max)) {
tsens->tsens_attribute = &s_tsens_attribute_copy[i];
int original_idx = -1;
for (int j = 0; j < TEMPERATURE_SENSOR_ATTR_RANGE_NUM; j++) {
if (temperature_sensor_attributes[j].reg_val == s_tsens_attribute_copy[i].reg_val) {
original_idx = j;
break;
}
}
if (original_idx != -1) {
temp_sensor_sync_tsens_idx(original_idx);
}
break;
}
temp_sensor_sync_tsens_idx(i);
}
ESP_RETURN_ON_FALSE(tsens->tsens_attribute != NULL, ESP_ERR_INVALID_ARG, TAG, "Out of testing range");
return ESP_OK;
@@ -166,6 +175,8 @@ esp_err_t temperature_sensor_install(const temperature_sensor_config_t *tsens_co
tsens->tsens_attribute->range_max,
tsens->tsens_attribute->error_max);
printf("tsens->tsens_attribute->reg_val: %d\n", tsens->tsens_attribute->reg_val);
temperature_sensor_ll_set_range(tsens->tsens_attribute->reg_val);
tsens->fsm = TEMP_SENSOR_FSM_INIT;

21
components/esp_hw_support/sar_periph_ctrl_common.c
View File

@@ -9,6 +9,7 @@
#include "freertos/FreeRTOS.h"
#include "esp_private/sar_periph_ctrl.h"
#include "esp_log.h"
#include "esp_timer.h"
#if SOC_TEMP_SENSOR_SUPPORTED
#include "hal/temperature_sensor_ll.h"
@@ -40,17 +41,22 @@ static const char *TAG_TSENS = "temperature_sensor";
# define SAR_PERIPH_CTRL_COMMON_FN_ATTR
#endif
#define TSENS_LINE_REGRESSION_US (200)
static int s_record_min = INT_NOT_USED;
static int s_record_max = INT_NOT_USED;
static int s_temperature_sensor_power_cnt;
static bool s_first_temp_read = false;
static uint8_t s_tsens_idx = 2; // Index for temperature attribute, set 2(middle) as default value
static int64_t timer1 = 0;
void temperature_sensor_power_acquire(void)
{
esp_os_enter_critical(&rtc_spinlock);
s_temperature_sensor_power_cnt++;
if (s_temperature_sensor_power_cnt == 1) {
s_first_temp_read = true;
regi2c_saradc_enable();
#if !SOC_TSENS_IS_INDEPENDENT_FROM_ADC
adc_apb_periph_claim();
@@ -60,6 +66,9 @@ void temperature_sensor_power_acquire(void)
temperature_sensor_ll_reset_module();
}
temperature_sensor_ll_enable(true);
// Set the range as recorded.
temperature_sensor_ll_set_range(temperature_sensor_attributes[s_tsens_idx].reg_val);
timer1 = esp_timer_get_time();
}
esp_os_exit_critical(&rtc_spinlock);
}
@@ -101,6 +110,18 @@ int16_t temp_sensor_get_raw_value(bool *range_changed)
{
esp_os_enter_critical(&rtc_spinlock);
// When this is the first time reading a value, check whether the time here minus the
// initialization time is greater than 200 microseconds (the time for linear regression).
// If it is less than 200 microseconds, continue waiting here.
if (s_first_temp_read == true) {
int64_t timer2 = esp_timer_get_time();
int64_t diff = timer2 - timer1;
if (diff < TSENS_LINE_REGRESSION_US) {
esp_rom_delay_us(TSENS_LINE_REGRESSION_US - diff);
}
s_first_temp_read = false;
}
int degree = temperature_sensor_get_raw_value();
uint8_t temperature_dac;