1 /* 2 * SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #pragma once 8 9 #include <esp_types.h> 10 #include <esp_err.h> 11 12 #ifdef __cplusplus 13 extern "C" { 14 #endif 15 16 /** 17 * @brief Type of eFuse blocks for ESP32 18 */ 19 typedef enum { 20 EFUSE_BLK0 = 0, /**< Number of eFuse block. Reserved. */ 21 22 EFUSE_BLK1 = 1, /**< Number of eFuse block. Used for Flash Encryption. If not using that Flash Encryption feature, they can be used for another purpose. */ 23 EFUSE_BLK_KEY0 = 1, /**< Number of eFuse block. Used for Flash Encryption. If not using that Flash Encryption feature, they can be used for another purpose. */ 24 EFUSE_BLK_ENCRYPT_FLASH = 1, /**< Number of eFuse block. Used for Flash Encryption. If not using that Flash Encryption feature, they can be used for another purpose. */ 25 26 EFUSE_BLK2 = 2, /**< Number of eFuse block. Used for Secure Boot. If not using that Secure Boot feature, they can be used for another purpose. */ 27 EFUSE_BLK_KEY1 = 2, /**< Number of eFuse block. Used for Secure Boot. If not using that Secure Boot feature, they can be used for another purpose. */ 28 EFUSE_BLK_SECURE_BOOT = 2, /**< Number of eFuse block. Used for Secure Boot. If not using that Secure Boot feature, they can be used for another purpose. */ 29 30 EFUSE_BLK3 = 3, /**< Number of eFuse block. Uses for the purpose of the user. */ 31 EFUSE_BLK_KEY2 = 3, /**< Number of eFuse block. Uses for the purpose of the user. */ 32 EFUSE_BLK_KEY_MAX = 4, 33 34 EFUSE_BLK_MAX = 4, 35 } esp_efuse_block_t; 36 37 /** 38 * @brief Type of coding scheme 39 */ 40 typedef enum { 41 EFUSE_CODING_SCHEME_NONE = 0, /**< None */ 42 EFUSE_CODING_SCHEME_3_4 = 1, /**< 3/4 coding */ 43 EFUSE_CODING_SCHEME_REPEAT = 2, /**< Repeat coding */ 44 } esp_efuse_coding_scheme_t; 45 46 /** 47 * @brief Type of key purpose (virtual because ESP32 has only fixed purposes for blocks) 48 */ 49 typedef enum { 50 ESP_EFUSE_KEY_PURPOSE_USER = 0, /**< BLOCK3 */ 51 ESP_EFUSE_KEY_PURPOSE_SYSTEM = 1, /**< BLOCK0 */ 52 ESP_EFUSE_KEY_PURPOSE_FLASH_ENCRYPTION = 2, /**< BLOCK1 */ 53 ESP_EFUSE_KEY_PURPOSE_SECURE_BOOT_V2 = 3, /**< BLOCK2 */ 54 ESP_EFUSE_KEY_PURPOSE_MAX, /**< MAX PURPOSE*/ 55 } esp_efuse_purpose_t; 56 57 #ifdef __cplusplus 58 } 59 #endif 60
