50 lines
2.3 KiB
C
50 lines
2.3 KiB
C
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// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define COUNT_EFUSE_BLOCKS 4 /* The number of blocks. */
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#define COUNT_EFUSE_REG_PER_BLOCK 8 /* The number of registers per block. */
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#define ESP_EFUSE_SECURE_VERSION_NUM_BLOCK EFUSE_BLK3
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#define ESP_EFUSE_FIELD_CORRESPONDS_CODING_SCHEME(blk, max_num_bit) \
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esp_efuse_coding_scheme_t scheme = esp_efuse_get_coding_scheme(blk); \
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if ((scheme == EFUSE_CODING_SCHEME_3_4 && max_num_bit > 192) || \
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(scheme == EFUSE_CODING_SCHEME_REPEAT && max_num_bit > 128)) { \
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return false; \
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}
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/* @brief Encode one or more sets of 6 byte sequences into
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* 8 bytes suitable for 3/4 Coding Scheme.
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*
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* This function is only useful if the CODING_SCHEME efuse
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* is set to value 1 for 3/4 Coding Scheme.
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*
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* @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.
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* @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.
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* @param in_bytes_len. Length of array pointed to by in_bytes, in bytes. Must be a multiple of 6.
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*
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* @return ESP_ERR_INVALID_ARG if either pointer is null or in_bytes_len is not a multiple of 6. ESP_OK otherwise.
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*/
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esp_err_t esp_efuse_utility_apply_34_encoding(const uint8_t *in_bytes, uint32_t *out_words, size_t in_bytes_len);
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#ifdef __cplusplus
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}
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#endif
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