esp-idf/components/efuse/esp32c6/esp_efuse_rtc_calib.c

82 lines
2.4 KiB
C

/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <esp_bit_defs.h>
#include "esp_efuse.h"
#include "esp_efuse_table.h"
int esp_efuse_rtc_calib_get_ver(void)
{
uint32_t result = 0;
esp_efuse_read_field_blob(ESP_EFUSE_BLK_VERSION_MAJOR, &result, ESP_EFUSE_BLK_VERSION_MAJOR[0]->bit_count); // IDF-5366
return result;
}
uint32_t esp_efuse_rtc_calib_get_init_code(int version, uint32_t adc_unit, int atten)
{
assert(version == 1);
(void) adc_unit;
const esp_efuse_desc_t** init_code_efuse;
assert(atten < 4);
if (atten == 0) {
init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN0;
} else if (atten == 1) {
init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN1;
} else if (atten == 2) {
init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN2;
} else {
init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN3;
}
int init_code_size = esp_efuse_get_field_size(init_code_efuse);
assert(init_code_size == 10);
uint32_t init_code = 0;
ESP_ERROR_CHECK(esp_efuse_read_field_blob(init_code_efuse, &init_code, init_code_size));
return init_code + 1000; // version 1 logic
}
esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, int atten, uint32_t* out_digi, uint32_t* out_vol_mv)
{
const esp_efuse_desc_t** cal_vol_efuse;
uint32_t calib_vol_expected_mv;
if (version != 1) {
return ESP_ERR_INVALID_ARG;
}
if (atten >= 4) {
return ESP_ERR_INVALID_ARG;
}
if (atten == 0) {
cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN0;
calib_vol_expected_mv = 400;
} else if (atten == 1) {
cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN1;
calib_vol_expected_mv = 550;
} else if (atten == 2) {
cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN2;
calib_vol_expected_mv = 750;
} else {
cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN3;
calib_vol_expected_mv = 1370;
}
assert(cal_vol_efuse[0]->bit_count == 10);
uint32_t cal_vol = 0;
ESP_ERROR_CHECK(esp_efuse_read_field_blob(cal_vol_efuse, &cal_vol, cal_vol_efuse[0]->bit_count));
*out_digi = 2000 + ((cal_vol & BIT(9))? -(cal_vol & ~BIT9): cal_vol);
*out_vol_mv = calib_vol_expected_mv;
return ESP_OK;
}
esp_err_t esp_efuse_rtc_calib_get_tsens_val(float* tsens_cal)
{
// Currently calibration is not supported on ESP32-C6, IDF-5236
*tsens_cal = 0;
return ESP_OK;
}