1 /*
2 * SPDX-FileCopyrightText: 2020-2023 Espressif Systems (Shanghai) CO LTD
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <esp_bit_defs.h>
8 #include "esp_efuse.h"
9 #include "esp_efuse_table.h"
10 #include "esp_efuse_rtc_calib.h"
11
esp_efuse_rtc_calib_get_ver(void)12 int esp_efuse_rtc_calib_get_ver(void)
13 {
14 uint32_t blk_ver_major = 0;
15 esp_efuse_read_field_blob(ESP_EFUSE_BLK_VERSION_MAJOR, &blk_ver_major, ESP_EFUSE_BLK_VERSION_MAJOR[0]->bit_count); // IDF-5366
16
17 uint32_t cali_version = (blk_ver_major == 1) ? ESP_EFUSE_ADC_CALIB_VER : 0;
18 if (!cali_version) {
19 ESP_LOGW("eFuse", "calibration efuse version does not match, set default version to 0");
20 }
21
22 return cali_version;
23 }
24
esp_efuse_rtc_calib_get_init_code(int version,uint32_t adc_unit,int atten)25 uint32_t esp_efuse_rtc_calib_get_init_code(int version, uint32_t adc_unit, int atten)
26 {
27 assert((version >= ESP_EFUSE_ADC_CALIB_VER_MIN) &&
28 (version <= ESP_EFUSE_ADC_CALIB_VER_MAX));
29 (void) adc_unit;
30 const esp_efuse_desc_t** init_code_efuse;
31 assert(atten < 4);
32 if (atten == 0) {
33 init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN0;
34 } else if (atten == 1) {
35 init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN1;
36 } else if (atten == 2) {
37 init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN2;
38 } else {
39 init_code_efuse = ESP_EFUSE_ADC1_INIT_CODE_ATTEN3;
40 }
41
42 int init_code_size = esp_efuse_get_field_size(init_code_efuse);
43 assert(init_code_size == 10);
44
45 uint32_t init_code = 0;
46 ESP_ERROR_CHECK(esp_efuse_read_field_blob(init_code_efuse, &init_code, init_code_size));
47 return init_code + 1000; // version 1 logic
48 }
49
esp_efuse_rtc_calib_get_cal_voltage(int version,uint32_t adc_unit,int atten,uint32_t * out_digi,uint32_t * out_vol_mv)50 esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, uint32_t adc_unit, int atten, uint32_t* out_digi, uint32_t* out_vol_mv)
51 {
52 (void)adc_unit; //On esp32c3, V1 we don't have calibration data for ADC2, using the efuse data of ADC1
53 const esp_efuse_desc_t** cal_vol_efuse;
54 uint32_t calib_vol_expected_mv;
55 if ((version < ESP_EFUSE_ADC_CALIB_VER_MIN) ||
56 (version > ESP_EFUSE_ADC_CALIB_VER_MAX)) {
57 return ESP_ERR_INVALID_ARG;
58 }
59 if (atten >= 4) {
60 return ESP_ERR_INVALID_ARG;
61 }
62 if (atten == 0) {
63 cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN0;
64 calib_vol_expected_mv = 400;
65 } else if (atten == 1) {
66 cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN1;
67 calib_vol_expected_mv = 550;
68 } else if (atten == 2) {
69 cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN2;
70 calib_vol_expected_mv = 750;
71 } else {
72 cal_vol_efuse = ESP_EFUSE_ADC1_CAL_VOL_ATTEN3;
73 calib_vol_expected_mv = 1370;
74 }
75
76 assert(cal_vol_efuse[0]->bit_count == 10);
77
78 uint32_t cal_vol = 0;
79 ESP_ERROR_CHECK(esp_efuse_read_field_blob(cal_vol_efuse, &cal_vol, cal_vol_efuse[0]->bit_count));
80
81 *out_digi = 2000 + ((cal_vol & BIT(9))? -(cal_vol & ~BIT9): cal_vol);
82 *out_vol_mv = calib_vol_expected_mv;
83 return ESP_OK;
84 }
85
esp_efuse_rtc_calib_get_tsens_val(float * tsens_cal)86 esp_err_t esp_efuse_rtc_calib_get_tsens_val(float* tsens_cal)
87 {
88 uint32_t version = esp_efuse_rtc_calib_get_ver();
89 if (version != 1) {
90 *tsens_cal = 0.0;
91 return ESP_ERR_NOT_SUPPORTED;
92 }
93 const esp_efuse_desc_t** cal_temp_efuse;
94 cal_temp_efuse = ESP_EFUSE_TEMP_CALIB;
95 int cal_temp_size = esp_efuse_get_field_size(cal_temp_efuse);
96 assert(cal_temp_size == 9);
97
98 uint32_t cal_temp = 0;
99 esp_err_t err = esp_efuse_read_field_blob(cal_temp_efuse, &cal_temp, cal_temp_size);
100 assert(err == ESP_OK);
101 (void)err;
102 // BIT(8) stands for sign: 1: negtive, 0: positive
103 *tsens_cal = ((cal_temp & BIT(8)) != 0)? -(uint8_t)cal_temp: (uint8_t)cal_temp;
104 return ESP_OK;
105 }
106
