ESP32-S3 `--flash_size 8MB` does not modify bootpartition.bin (ESPTOOL-431)

[Jason2866]

Operating System

macOS 12.3

Version

latest master

Python Version

3.8.12

Chip Description

ESP32-S3

Device Description

AI-Thinker ESPS3-12K (NodeMCU)

Hardware Configuration

nothing

How is Esptool Run

VSC and directly via command line

Full Esptool Command Line that Was Run

esptool.py --chip esp32s3 write_flash --flash_size 8MB 0x0 bootloader.bin 0xe000 boot_app0.bin 0x8000 partition-table.bin 0x10000 app.bin

Esptool finishes normally.

Reading bootloader first bytes back
E903022F C0613B40 EE000000 09000000
so this is still the orig. 4MB bootloader provided from Arduino framework
Correct for 8MB would be
E903023F C0613B40 EE000000 09000000

More Information

No response

Other Steps to Reproduce

Flashing a 8MB ESP32-S3 device with this Arduino bootpartition.bin

I Have Read the Troubleshooting Guide

• I confirm I have read the troubleshooting guide.

[radimkarnis]

Hello @Jason2866,

esptool is not updating the image header, because it doesn't think it is a bootloader image. This is because you are flashing the bootloader at offset 0x0, but it should be flashed at 0x1000.

The check in question is here. You can see it skips updating the image header if its offset is not 0x1000.

To verify, try flashing the bootloader to 0x1000, the flash_size byte should be updated.

Let me verify if this value is right or should be updated for ESP32-S3 (for instance ESP32-C3 bootloader goes to 0x0).

[Jason2866]

@radimkarnis The bootloader for S3 is indeed at 0x0 and has to be changed.

Edit: Did the needed change. S3 does now boot :-) Thx for the hint where to search!

[dobairoland]

Closed by #728.