Chapter 2. API Reference
• Yes (enabled)
CONFIG_SPIFFS_META_LENGTH
Size of per-file metadata field
Found in: Component config > SPIFFS Configuration
This option sets the number of extra bytes stored in the file header. These bytes can be used in an
application-specific manner. Set this to at least 4 bytes to enable support for saving file modification
time.
SPIFFS_OBJ_NAME_LEN + SPIFFS_META_LENGTH should not exceed SPIFFS_PAGE_SIZE -
64.
Default value:
• 4
CONFIG_SPIFFS_USE_MTIME
Save file modification time
Found in: Component config > SPIFFS Configuration
If enabled, then the first 4 bytes of per-file metadata will be used to store file modification time (mtime),
accessible through stat/fstat functions. Modification time is updated when the file is opened.
Default value:
• Yes (enabled)
CONFIG_SPIFFS_MTIME_WIDE_64_BITS
The time field occupies 64 bits in the image instead of 32 bits
Found in: Component config > SPIFFS Configuration
If this option is not set, the time field is 32 bits (up to 2106 year), otherwise it is 64 bits and make
sure it matches SPIFFS_META_LENGTH. If the chip already has the spiffs image with the time
field = 32 bits then this option cannot be applied in this case. Erase it first before using this op-
tion. To resolve the Y2K38 problem for the spiffs, use a toolchain with support time_t 64 bits (see
SDK_TOOLCHAIN_SUPPORTS_TIME_WIDE_64_BITS).
Default value:
• No (disabled) if CONFIG_SPIFFS_META_LENGTH >= 8
Debug Configuration Contains:
• CONFIG_SPIFFS_DBG
• CONFIG_SPIFFS_API_DBG
• CONFIG_SPIFFS_CACHE_DBG
• CONFIG_SPIFFS_CHECK_DBG
• CONFIG_SPIFFS_TEST_VISUALISATION
• CONFIG_SPIFFS_GC_DBG
CONFIG_SPIFFS_DBG
Enable general SPIFFS debug
Found in: Component config > SPIFFS Configuration > Debug Configuration
Enabling this option will print general debug mesages to the console.
Default value:
• No (disabled)
Espressif Systems 1224
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