mirror of
https://github.com/espressif/esp-idf.git
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90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2021 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 <esp_bit_defs.h>
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#include "esp_efuse.h"
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#include "esp_efuse_table.h"
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int esp_efuse_rtc_calib_get_ver(void)
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{
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uint32_t result = 0;
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esp_efuse_read_field_blob(ESP_EFUSE_BLOCK2_VERSION, &result, 3);
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return result;
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}
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uint16_t esp_efuse_rtc_calib_get_init_code(int version, int atten)
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{
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assert(version == 1);
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const esp_efuse_desc_t** init_code_efuse;
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assert(atten < 4);
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if (atten == 0) {
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init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN0;
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} else if (atten == 1) {
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init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN1;
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} else if (atten == 2) {
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init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN2;
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} else {
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init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN3;
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}
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int init_code_size = esp_efuse_get_field_size(init_code_efuse);
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assert(init_code_size == 10);
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uint32_t init_code = 0;
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(init_code_efuse, &init_code, init_code_size));
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return init_code + 1000; // version 1 logic
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}
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esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, int atten, uint32_t* out_digi, uint32_t* out_vol_mv)
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{
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const esp_efuse_desc_t** cal_vol_efuse;
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uint32_t calib_vol_expected_mv;
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if (version != 1) {
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return ESP_ERR_INVALID_ARG;
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}
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if (atten >= 4) {
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return ESP_ERR_INVALID_ARG;
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}
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if (atten == 0) {
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cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN0;
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calib_vol_expected_mv = 400;
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} else if (atten == 1) {
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cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN1;
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calib_vol_expected_mv = 550;
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} else if (atten == 2) {
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cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN2;
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calib_vol_expected_mv = 750;
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} else {
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cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN3;
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calib_vol_expected_mv = 1370;
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}
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assert(cal_vol_efuse[0]->bit_count == 10);
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uint32_t cal_vol = 0;
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(cal_vol_efuse, &cal_vol, cal_vol_efuse[0]->bit_count));
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*out_digi = 2000 + ((cal_vol & BIT(9))? -(cal_vol & ~BIT9): cal_vol);
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*out_vol_mv = calib_vol_expected_mv;
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return ESP_OK;
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}
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float esp_efuse_rtc_calib_get_cal_temp(int version)
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{
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assert(version == 1);
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const esp_efuse_desc_t** cal_temp_efuse;
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cal_temp_efuse = ESP_EFUSE_TEMP_CALIB;
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int cal_temp_size = esp_efuse_get_field_size(cal_temp_efuse);
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assert(cal_temp_size == 9);
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uint32_t cal_temp = 0;
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esp_err_t err = esp_efuse_read_field_blob(cal_temp_efuse, &cal_temp, cal_temp_size);
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assert(err == ESP_OK);
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(void)err;
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// BIT(8) stands for sign: 1: negtive, 0: positive
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return ((cal_temp & BIT(8)) != 0)? -(uint8_t)cal_temp: (uint8_t)cal_temp;
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}
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