1 /* 2 * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #pragma once 8 9 #ifdef __cplusplus 10 extern "C" { 11 #endif 12 13 #define ESP_EFUSE_LEN_OF_3_4_SCHEME_BLOCK_IN_BYTES (24) 14 #define ESP_EFUSE_LEN_OF_REPEAT_BLOCK_IN_BYTES (16) 15 16 #define COUNT_EFUSE_REG_PER_BLOCK 8 /* The number of registers per block. */ 17 18 #define ESP_EFUSE_SECURE_VERSION_NUM_BLOCK EFUSE_BLK3 19 20 #define ESP_EFUSE_FIELD_CORRESPONDS_CODING_SCHEME(blk, max_num_bit) \ 21 esp_efuse_coding_scheme_t scheme = esp_efuse_get_coding_scheme(blk); \ 22 if ((scheme == EFUSE_CODING_SCHEME_3_4 && max_num_bit > 192) || \ 23 (scheme == EFUSE_CODING_SCHEME_REPEAT && max_num_bit > 128)) { \ 24 return false; \ 25 } 26 27 /* @brief Encode one or more sets of 6 byte sequences into 28 * 8 bytes suitable for 3/4 Coding Scheme. 29 * 30 * This function is only useful if the CODING_SCHEME efuse 31 * is set to value 1 for 3/4 Coding Scheme. 32 * 33 * @param[in] in_bytes Pointer to a sequence of bytes to encode for 3/4 Coding Scheme. Must have length in_bytes_len. After being written to hardware, these bytes will read back as little-endian words. 34 * @param[out] out_words Pointer to array of words suitable for writing to efuse write registers. Array must contain 2 words (8 bytes) for every 6 bytes in in_bytes_len. Can be a pointer to efuse write registers. 35 * @param in_bytes_len. Length of array pointed to by in_bytes, in bytes. Must be a multiple of 6. 36 * 37 * @return ESP_ERR_INVALID_ARG if either pointer is null or in_bytes_len is not a multiple of 6. ESP_OK otherwise. 38 */ 39 esp_err_t esp_efuse_utility_apply_34_encoding(const uint8_t *in_bytes, uint32_t *out_words, size_t in_bytes_len); 40 41 #ifdef __cplusplus 42 } 43 #endif 44
