esp_efuse_key_block_unused() function

Returns true if the key block is unused, false otherwise. An unused key block is all zero content, not read or write protected, and has purpose 0 (ESP_EFUSE_KEY_PURPOSE_USER)

Syntax

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Summary

Declaration

Definition

from esp_efuse.h:554

bool esp_efuse_key_block_unused(esp_efuse_block_t block);

Implemented in esp_efuse_api_key.c:133

Arguments

Argument

Description

block

key block to check.

Return value

- True if key block is unused, - False if key block is used or the specified block index is not a key block.

References

Code

Location

Referrer

bool esp_efuse_key_block_unused(esp_efuse_block_t block)

esp_efuse_api_key.c:133

bool esp_efuse_key_block_unused(esp_efuse_block_t block);

esp_efuse.h:554

if (!esp_efuse_key_block_unused(block)) {

esp_efuse_api_key.c:197

esp_efuse_write_key()

Call Tree

esp_efuse_key_block_unused() is called by 1 function and calls 3 functions:

esp_efuse_write_key()

esp_efuse_key_block_unused()

esp_efuse_block_is_empty()

esp_efuse_get_key_dis_read()

esp_efuse_get_key_dis_write()

Data Use

esp_efuse_key_block_unused() reads 2 variables:

esp_efuse_block_t::EFUSE_BLK_KEY0

esp_efuse_block_t::EFUSE_BLK_KEY_MAX

esp_efuse_key_block_unused()

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