24 lines
925 B
Markdown
24 lines
925 B
Markdown
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# SD Card example
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This example demonstrates how to use wear levelling library and FATFS library to store files in a partition inside SPI flash. Example does the following steps:
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1. Use an "all-in-one" `esp_vfs_fat_spiflash_mount` function to:
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- find a partition in SPI flash,
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- initialize wear levelling library using this partition
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- mount FAT filesystem using FATFS library (and format the filesystem, if the filesystem can not be mounted),
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- register FAT filesystem in VFS, enabling C standard library and POSIX functions to be used.
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2. Create a file using `fopen` and write to it using `fprintf`.
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3. Open file for reading, read back the line, and print it to the terminal.
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## Example output
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Here is an typical example console output.
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```
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Try to open file ...
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I (239) wear_level: Reading file
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Read from file: 'Hello User! I'm happy to see you!1'
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W (239) wear_levelling: wl_unmount Delete driver
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```
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