kopia lustrzana https://github.com/espressif/esp-idf
28 wiersze
1.2 KiB
Markdown
28 wiersze
1.2 KiB
Markdown
# SPIFFS example
|
|
|
|
This example demonstrates how to use SPIFFS with ESP32. Example does the following steps:
|
|
|
|
1. Use an "all-in-one" `esp_vfs_spiffs_register` function to:
|
|
- initialize SPIFFS,
|
|
- mount SPIFFS filesystem using SPIFFS library (and format, if the filesystem can not be mounted),
|
|
- register SPIFFS filesystem in VFS, enabling C standard library and POSIX functions to be used.
|
|
2. Create a file using `fopen` and write to it using `fprintf`.
|
|
3. Rename the file. Before renaming, check if destination file already exists using `stat` function, and remove it using `unlink` function.
|
|
4. Open renamed file for reading, read back the line, and print it to the terminal.
|
|
|
|
## Example output
|
|
|
|
Here is an example console output. In this case `format_if_mount_failed` parameter was set to `true` in the source code. SPIFFS was unformatted, so the initial mount has failed. SPIFFS was then formatted, and mounted again.
|
|
|
|
```
|
|
I (195) example: Initializing SPIFFS
|
|
E (195) SPIFFS: mount failed, -10025. formatting...
|
|
I (4525) example: Opening file
|
|
I (4635) example: File written
|
|
I (4685) example: Renaming file
|
|
I (4735) example: Reading file
|
|
I (4735) example: Read from file: 'Hello World!'
|
|
I (4735) example: SPIFFS unmounted
|
|
```
|
|
|