Picotool load combined uf2 ignoring family ID

[ArendJan]

According to https://github.com/microsoft/uf2#family-id , the family ID is there to allow multiple uf2 files combined into one for different targets.
(and also some comments in #313 )
This works well with the RP2040 bootloader, when copying the uf2 ( cp test2.uf2 /media/arendjan/RPI-RP2/ ) then my board runs the correct firmware, either first or second part of the combined uf2.

When using picotool load -f combined.uf2, I get:

Tracking device serial number E6625C48934A7E32 for reboot
The device was asked to reboot into BOOTSEL mode so the command can be executed.

WARNING: Multiple family IDs in a single UF2 file - only using first one
WARNING: Multiple family IDs in a single UF2 file - only using first one
Loading into Flash:   [==============================]  100%

The device was asked to reboot back into application mode.

and the board either boots the code (when first part of uf2 is for it) or reconnects in bootloader mode (when correct blocks are in second part).

Using family flags ( --family rp2040 ) doesn't help.

I'd assume picotool would only upload the firmware for the connected device (or the bootloader would filter it).

(picotool build from current main)

RP2350 also not working:

UF2 correct part is second one:

Tracking device serial number DA72B1529E0666F5 for reboot
The device was asked to reboot into BOOTSEL mode so the command can be executed.

WARNING: Multiple family IDs in a single UF2 file - only using first one
Family ID 'rp2040' cannot be downloaded anywhere
ERROR: This file cannot be loaded onto a device with no partition table

UF2 correct part is first one:

WARNING: Multiple family IDs in a single UF2 file - only using first one
Family ID 'rp2350-arm-s' can be downloaded in absolute space:
  00000000->02000000
WARNING: Multiple family IDs in a single UF2 file - only using first one
Loading into Flash:   [==============================]  100%

[will-v-pi]

picotool load currently doesn't handle UF2s containing multpile family IDs - as the warning says:

WARNING: Multiple family IDs in a single UF2 file - only using first one

I did a bit of work to fix this on this branch - I will have a look at fixing that up and raise a PR

[will-v-pi]

PR raised #349 - does that fix the issue with your combined UF2?

[ArendJan]

@will-v-pi yes, it works great! Thank you!