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_log.h"
9 #include "esp_efuse.h"
10 #include "esp_efuse_table.h"
11 #include "esp_efuse_rtc_calib.h"
12 #include "hal/adc_types.h"
13
esp_efuse_rtc_calib_get_ver(void)14 int esp_efuse_rtc_calib_get_ver(void)
15 {
16 uint32_t blk_ver_major = 0;
17 esp_efuse_read_field_blob(ESP_EFUSE_BLK_VERSION_MAJOR, &blk_ver_major, ESP_EFUSE_BLK_VERSION_MAJOR[0]->bit_count); // IDF-5366
18
19 uint32_t cali_version = (blk_ver_major == 0) ? ESP_EFUSE_ADC_CALIB_VER : 0;
20 if (!cali_version) {
21 ESP_LOGW("eFuse", "calibration efuse version does not match, set default version to 0");
22 }
23
24 return cali_version;
25 }
26
esp_efuse_rtc_calib_get_init_code(int version,uint32_t adc_unit,int atten)27 uint32_t esp_efuse_rtc_calib_get_init_code(int version, uint32_t adc_unit, int atten)
28 {
29 assert((version >= ESP_EFUSE_ADC_CALIB_VER_MIN) &&
30 (version <= ESP_EFUSE_ADC_CALIB_VER_MAX));
31 assert(atten <= ADC_ATTEN_DB_12);
32 (void) adc_unit;
33
34 if (atten == ADC_ATTEN_DB_2_5 || atten == ADC_ATTEN_DB_6) {
35 /**
36 * - ESP32C2 only supports HW calibration on ADC_ATTEN_DB_0 and ADC_ATTEN_DB_12
37 * - For other attenuation, we just return default value, which is 0.
38 */
39 return 0;
40 }
41
42 int32_t adc_icode_diff_atten0 = 0;
43 int32_t adc_icode_diff_atten3 = 0;
44 int efuse_icode_bits = 0;
45
46 efuse_icode_bits = esp_efuse_get_field_size(ESP_EFUSE_ADC1_INIT_CODE_ATTEN0);
47 ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_ADC1_INIT_CODE_ATTEN0, &adc_icode_diff_atten0, efuse_icode_bits));
48 adc_icode_diff_atten0 = ((adc_icode_diff_atten0 & BIT(7)) != 0) ? -(adc_icode_diff_atten0 & 0x7f): adc_icode_diff_atten0;
49
50 efuse_icode_bits = esp_efuse_get_field_size(ESP_EFUSE_ADC1_INIT_CODE_ATTEN3);
51 ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_ADC1_INIT_CODE_ATTEN3, &adc_icode_diff_atten3, efuse_icode_bits));
52
53 ESP_EARLY_LOGV("eFuse", "adc_icode_diff_atten0: 0d%"PRId32", adc_icode_diff_atten3: 0d%"PRId32, adc_icode_diff_atten0, adc_icode_diff_atten3);
54
55 uint32_t init_code = 0;
56 if (atten == ADC_ATTEN_DB_0) {
57 init_code = adc_icode_diff_atten0 + 2160;
58 } else {
59 //ADC_ATTEN_DB_12
60 init_code = adc_icode_diff_atten3 + adc_icode_diff_atten0 + 2160;
61 }
62
63 return init_code;
64 }
65
esp_efuse_rtc_calib_get_cal_voltage(int version,uint32_t adc_unit,int atten,uint32_t * out_digi,uint32_t * out_vol_mv)66 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)
67 {
68 assert((version >= ESP_EFUSE_ADC_CALIB_VER_MIN) &&
69 (version <= ESP_EFUSE_ADC_CALIB_VER_MAX));
70 assert(atten <= ADC_ATTEN_DB_12);
71 (void) adc_unit;
72
73 if (atten == ADC_ATTEN_DB_2_5 || atten == ADC_ATTEN_DB_6) {
74 /**
75 * - ESP32C2 only supports SW calibration on ADC_ATTEN_DB_0 and ADC_ATTEN_DB_12
76 * - For other attenuation, we need to return an error, informing upper layer SW calibration driver
77 * to deal with the error.
78 */
79 return ESP_ERR_INVALID_ARG;
80 }
81
82 int32_t adc_vol_diff_atten0 = 0;
83 int32_t adc_vol_diff_atten3 = 0;
84 int efuse_vol_bits = 0;
85
86 efuse_vol_bits = esp_efuse_get_field_size(ESP_EFUSE_ADC1_CAL_VOL_ATTEN0);
87 ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_ADC1_CAL_VOL_ATTEN0, &adc_vol_diff_atten0, efuse_vol_bits));
88 adc_vol_diff_atten0 = ((adc_vol_diff_atten0 & BIT(7)) != 0) ? -(adc_vol_diff_atten0 & 0x7f): adc_vol_diff_atten0;
89
90 efuse_vol_bits = esp_efuse_get_field_size(ESP_EFUSE_ADC1_CAL_VOL_ATTEN3);
91 ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_ADC1_CAL_VOL_ATTEN3, &adc_vol_diff_atten3, efuse_vol_bits));
92 adc_vol_diff_atten3 = ((adc_vol_diff_atten3 & BIT(5)) != 0) ? -(adc_vol_diff_atten3 & 0x1f): adc_vol_diff_atten3;
93
94 ESP_EARLY_LOGV("eFuse", "adc_vol_diff_atten0: 0d%"PRId32", adc_vol_diff_atten3: 0d%"PRId32, adc_vol_diff_atten0, adc_vol_diff_atten3);
95
96 if (atten == ADC_ATTEN_DB_0) {
97 *out_digi = adc_vol_diff_atten0 + 1540;
98 *out_vol_mv = 400;
99 } else {
100 //ADC_ATTEN_DB_12
101 *out_digi = adc_vol_diff_atten0 + 1540 - adc_vol_diff_atten3 - 123;
102 *out_vol_mv = 1370;
103 }
104
105 return ESP_OK;
106 }
107
esp_efuse_rtc_calib_get_tsens_val(float * tsens_cal)108 esp_err_t esp_efuse_rtc_calib_get_tsens_val(float* tsens_cal)
109 {
110 // Currently calibration is not supported on ESP32-C2, IDF-5236
111 *tsens_cal = 0.0;
112 return ESP_OK;
113 }
114
