Partition table size is documented as 0xC00, but is set to 0x1000 (IDFGH-8377)

[axos88]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

master

Operating System used.

Linux

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

No response

What is the expected behavior?

With the default partition table offset at 0x8000, and the partition table length of 0xC00, the offset of the first partition should be able to start at 0x8C00, as documented here: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/partition-tables.html

What is the actual behavior?

esp-idf/components/partition_table/gen_esp32part.py

Line 26 in af28c1f

PARTITION_TABLE_SIZE = 0x1000 # Size of partition table

Steps to reproduce.

Using any example project, modify the partition table so that the first partition starts at offset 0x8C00, and attempt to build

Build or installation Logs.

CSV Error: First partition offset 0x8c00 overlaps end of partition table 0x9000

More Information.

Either the documentation needs to be updated, or the

esp-idf/components/partition_table/gen_esp32part.py

Line 26 in af28c1f

PARTITION_TABLE_SIZE = 0x1000 # Size of partition table

needs to be updated according to the actual size.

1K space is lost this way.

[igrr]

@axos88 the error message is misleading here, the actual reason why the partition can't start at 0x8c00 is that we don't support partitions which aren't aligned to SPI Flash erase sector size (0x1000).
We'll take a look at the tool and make changes so that the correct error is reported.

[axos88]

Ah thanks for updating the title. Yeah I can see why that would be a problem, but it indeed needs to throw a better error message, and it probably needs mention in the partition table documentation