Chapter 2. API Reference
ESP_PARTITION_SUBTYPE_APP_TEST = 0x20
Test application partition.
ESP_PARTITION_SUBTYPE_DATA_OTA = 0x00
OTA selection partition.
ESP_PARTITION_SUBTYPE_DATA_PHY = 0x01
PHY init data partition.
ESP_PARTITION_SUBTYPE_DATA_NVS = 0x02
NVS partition.
ESP_PARTITION_SUBTYPE_DATA_COREDUMP = 0x03
COREDUMP partition.
ESP_PARTITION_SUBTYPE_DATA_NVS_KEYS = 0x04
Partition for NVS keys.
ESP_PARTITION_SUBTYPE_DATA_EFUSE_EM = 0x05
Partition for emulate eFuse bits.
ESP_PARTITION_SUBTYPE_DATA_UNDEFINED = 0x06
Undefined (or unspecified) data partition.
ESP_PARTITION_SUBTYPE_DATA_ESPHTTPD = 0x80
ESPHTTPD partition.
ESP_PARTITION_SUBTYPE_DATA_FAT = 0x81
FAT partition.
ESP_PARTITION_SUBTYPE_DATA_SPIFFS = 0x82
SPIFFS partition.
ESP_PARTITION_SUBTYPE_ANY = 0xff
Used to search for partitions with any subtype.
API Reference - Flash Encrypt
Header File
• components/bootloader_support/include/esp_flash_encrypt.h
Functions
static bool esp_flash_encryption_enabled(void)
Is flash encryption currently enabled in hardware?
Flash encryption is enabled if the FLASH_CRYPT_CNT efuse has an odd number of bits set.
Return true if flash encryption is enabled.
esp_err_t esp_flash_encrypt_check_and_update(void)
esp_err_t esp_flash_encrypt_region(uint32_t src_addr, size_t data_length)
Encrypt-in-place a block of flash sectors.
Note This function resets RTC_WDT between operations with sectors.
Return ESP_OK if all operations succeeded, ESP_ERR_FLASH_OP_FAIL if SPI flash fails,
ESP_ERR_FLASH_OP_TIMEOUT if flash times out.
Parameters
• src_addr: Source offset in flash. Should be multiple of 4096 bytes.
• data_length: Length of data to encrypt in bytes. Will be rounded up to next multiple of 4096
bytes.
void esp_flash_write_protect_crypt_cnt(void)
Write protect FLASH_CRYPT_CNT.
Espressif Systems 763
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