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feat(storage): Add generic partition BDL example

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Add an example under examples/storage/generic_partition_bdl that
partitions a raw block device at run time using only the Block Device
Layer (BDL) interface.

The example obtains a whole-disk BDL (SPI flash data partition by
default, or an SD/eMMC card via menuconfig), writes an MBR partition
table onto it with the esp_ext_part_tables managed component (fetched
via idf_component.yml), then creates a generic-partition BDL for each
MBR entry with esp_blockdev_generic_partition_get() and mounts FATFS on
the FAT slice and LittleFS on the LittleFS slice.
This commit is contained in:
Adam Múdry
2026-09-08 14:38:16 +02:00
parent 9d8b1812fd
commit 98fee5a68a
17 changed files with 1182 additions and 0 deletions
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examples/storage/generic_partition_bdl/partitions_example.csv
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# Name, Type, SubType, Offset, Size, Flags
# Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
nvs, data, nvs, 0x9000, 0x6000,
phy_init, data, phy, 0xf000, 0x1000,
factory, app, factory, 0x10000, 1M,
# Whole-disk data partition. The example writes an MBR onto it at run time and
# splits it into a FAT and a LittleFS sub-partition using generic-partition BDLs.
storage, data, fat, , 2M,
1 # Name, Type, SubType, Offset, Size, Flags
2 # Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
3 nvs, data, nvs, 0x9000, 0x6000,
4 phy_init, data, phy, 0xf000, 0x1000,
5 factory, app, factory, 0x10000, 1M,
6 # Whole-disk data partition. The example writes an MBR onto it at run time and
7 # splits it into a FAT and a LittleFS sub-partition using generic-partition BDLs.
8 storage, data, fat, , 2M,