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temp_sensor: add calibration for esp32c3

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This commit is contained in:
Cao Sen Miao
2021-01-13 21:23:08 +08:00
parent 0c77299c34
commit d92ac450a2
11 changed files with 63 additions and 20 deletions
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17
components/driver/esp32s2/rtc_tempsensor.c
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@@ -14,6 +14,7 @@
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include "esp_types.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
@@ -61,7 +62,7 @@ static const tsens_dac_offset_t dac_offset[TSENS_DAC_MAX] = {
static SemaphoreHandle_t rtc_tsens_mux = NULL;
static float deltaT = 1000; // greater than range
static float s_deltaT = NAN; // Unused number
esp_err_t temp_sensor_set_config(temp_sensor_config_t tsens)
{
@@ -142,20 +143,20 @@ static void read_delta_t_from_efuse(void)
uint32_t version = esp_efuse_rtc_table_read_calib_version();
if (version == 1 || version == 2) {
// fetch calibration value for temp sensor from eFuse
deltaT = esp_efuse_rtc_table_get_parsed_efuse_value(RTCCALIB_IDX_TMPSENSOR, false) / 10.0;
s_deltaT = esp_efuse_rtc_table_get_parsed_efuse_value(RTCCALIB_IDX_TMPSENSOR, false) / 10.0;
} else {
// no value to fetch, use 0.
deltaT = 0;
s_deltaT = 0;
}
ESP_LOGD(TAG, "deltaT = %f\n", deltaT);
ESP_LOGD(TAG, "s_deltaT = %f\n", s_deltaT);
}
static float parse_temp_sensor_raw_value(uint32_t tsens_raw, const tsens_dac_offset_t *dac)
static float parse_temp_sensor_raw_value(uint32_t tsens_raw, const int dac_offset)
{
if (deltaT > 512) { //suggests that the value is not initialized
if (isnan(s_deltaT)) { //suggests that the value is not initialized
read_delta_t_from_efuse();
}
float result = (TSENS_ADC_FACTOR * (float)tsens_raw - TSENS_DAC_FACTOR * dac->offset - TSENS_SYS_OFFSET) - deltaT;
float result = (TSENS_ADC_FACTOR * (float)tsens_raw - TSENS_DAC_FACTOR * dac_offset - TSENS_SYS_OFFSET) - s_deltaT;
return result;
}
@@ -169,7 +170,7 @@ esp_err_t temp_sensor_read_celsius(float *celsius)
ret = temp_sensor_read_raw(&tsens_out);
TSENS_CHECK(ret == ESP_OK, ret);
const tsens_dac_offset_t *dac = &dac_offset[tsens.dac_offset];
*celsius = parse_temp_sensor_raw_value(tsens_out, dac);
*celsius = parse_temp_sensor_raw_value(tsens_out, dac->offset);
if (*celsius < dac->range_min || *celsius > dac->range_max) {
ESP_LOGW(TAG, "Exceeding the temperature range!");
ret = ESP_ERR_INVALID_STATE;