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Firmware m0801
Target
Purpose
Versions
Structure
OS and Libraries
Flashing
Interfaces
The firmware programs SoC which handles video encoding and flight control. Location of this chip:
- in WM230, Allwinner H3 SoC is on WM230 Main Core Processor board
- in WM240, Allwinner H3 SoC is on WM240 Core Board
- in other products, the location is unknown
Note that within WM220, the m0801 module identifier is used to store something different - there's m0901 instead. So the information on this page does not apply to WM220.
The module contains programming of a SoC which handles image sensor and video encoding, but also flight control. Additionally, it uses TrustZone to (semi)securely store cryptographic keys, and is the component which controls firmware update process on the drone.
TODO
The IM*H module within FW update package is always encrypted, with AES, using platform-specific UFIE key.
Decrypted firmware is a JAR file, which when unzipped reveals typical Android boot images (normal.img, recovery.img), and a 2nd stage bootloader (bootarea.img). It also contains new content for system and vendor partitions, as sparse filesystem images (*.new.dat, *.transfer.list).
The bootarea.img has the bootloader encrypted with TBIE key. Like the whole firmware file, it has IM*H format, though within the bootloader that part is preceded by a little chunk of unencrypted code.
Boot partitions (normal.img, recovery.img) are encrypted with TBIE key, and have IM*H format as well.
TODO
TODO
TODO
This page is created by drone enthusiasts for drone enthusiasts.
If you see a mistake, or you know more about specific subject, or you see an area for improvement for the wiki - create an issue in this project and attach your patch (or describe the change you propose).